Company lists · Data refreshed September 2026
Top 25 Outsourced administration services based in the United States
RevenueBase identified 1,380 company matches for outsourced administration services associated with the United States as of September 2026 and tracks 21,195 professional contacts across them, including 4,264 with verified work emails. New York is the largest hub.
This list covers company matches for outsourced administration services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest outsourced administration services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 921 contacts → | ||||
Exact match “IST Management Services, Inc is an outsourcing company specializing in the life cycle management of your information: From incoming mail, to complex print jobs, to eDiscovery and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 2 | 586 contacts → | ||||
Exact match “CoAdvantage is now CoAd.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 558 contacts → | ||||
Exact match “GSA National has been helping government contractors ensure compliance and streamline costs since 1991.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 490 contacts → | ||||
Exact match “OBM is a leading business process management company in UAE which provides client driven business management solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 447 contacts → | ||||
Exact match “Velan Info Services is a leading multidisciplinary service provider with its clients across the globe.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 297 contacts → | ||||
Exact match “CogNet is a leading Business Process Management (BPM) company supporting our partners in the Human Resource Services industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 7 | 293 contacts → | ||||
Exact match “Pentegra is a leading provider of retirement plan and fiduciary outsourcing solutions nationwide.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 220 contacts → | ||||
Exact match “Stone Coast Fund Services delivers comprehensive fund administration to alternative investment managers who expect more.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 201 contacts → | ||||
Exact match “Seibels offers the Property and Casualty Insurance industry and Financial Services industry business process outsourcing (BPO) services, and third-party administration (TPA)…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 199 contacts → | ||||
Exact match “Viteos has been rebranded following the acquisition by Intertrust Group, a world-leader in specialised administration services to clients in over 30 jurisdictions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 184 contacts → | ||||
Exact match “Servicios Contables is an Executive Office company located in 115 Parker Rd, Houston, Texas, United States.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 160 contacts → | ||||
Exact match “Countsy provides outsourced Accounting, HR/People Operations, Equity Administration, FP & A, and more for startups, scaleups, and spinouts.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 149 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 142 contacts → | ||||
Exact match “As a national retirement services company, The Retirement Advantage (TRA) provides third party administration and fiduciary services to plan sponsors, financial advisors, wealth…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 142 contacts → | ||||
Exact match “Your Remote Assistant is the go-to partner of many investors and startups for administrative manpower because of our high caliber assistants who are smart, experienced, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 126 contacts → | ||||
Exact match “GLC Business Services provides professional organizations with customer service focused on-site support.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 17 | 123 contacts → | ||||
Exact match “Avitus Group is a worldwide company that simplifies, strengthens and grows businesses by providing administrative support (Payroll, accounting, taxes, HR and much more.) When a…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 122 contacts → | ||||
Exact match “POMCO is one of the nation’s largest third party administrators offering customized, fully - integrated benefits programs to a broad spectrum of organizations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 104 contacts → | ||||
Exact match “driasi is a leading provider of outsourced administrative solutions tailored to the insurance industry, and a preferred partner to many of North America's best-known brands.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 20 | 90 contacts → | ||||
Exact match “A company that provides business services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 82 contacts → | ||||
Exact match “Cobalt MedPlans is an outsourcing partner with core competencies in high end Claims Administration and Contact Center services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 81 contacts → | ||||
Exact match “In 2022, as businesses worldwide faced growing pressures, we realized that the biggest challenge wasn’t lack of talent or ideas-it was lack of support.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 23 | 80 contacts → | ||||
Exact match “AdvanStaff HR takes the headache out of HR so busy owners and lean HR teams can focus on running the business, not juggling paperwork.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 79 contacts → | ||||
Exact match “We believe that every business leader should have the opportunity to focus on serving their clients and growing their business, leaving the administrative duties of being an…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 25 | 78 contacts → | ||||
Exact match “HealthNow Administrative Services (HNAS) is a national administrator of custom-designed insured employee benefit programs.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “outsourced administration services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 1,380 outsourced administration services based in the United States
See the full list, filter by size, metro and specialty, and access 4,264 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Outsourced administration services based in the United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,380 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “outsourced administration services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 4,264 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Outsourced administration services by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “outsourced administration services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many outsourced administration services are there based in the United States?
RevenueBase identified 1,380 company matches for outsourced administration services associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
IST Management tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most outsourced administration services?
New York leads with 43 company records, followed by Houston (37) and Atlanta (30).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,264 professional contacts with verified work emails tracked across these 1,380 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,380 outsourced administration services based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Outsourced administration services by geography
- Outsourced administration services based in Sao Paulo, Brazil
- Outsourced administration services based in Ahmedabad, India
- Outsourced administration services based in Mumbai, India
- Outsourced administration services based in Houston, United States
- Outsourced administration services based in New York, United States
- Outsourced administration services based in Australia
- Outsourced administration services based in Belgium
- Outsourced administration services based in Brazil
- Outsourced administration services based in Canada
- Outsourced administration services based in Chile
- Outsourced administration services based in Colombia
- Outsourced administration services based in Denmark
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Outsourced administration services based in Sao Paulo, Brazil
- Outsourced administration services based in Ahmedabad, India
- Outsourced administration services based in Mumbai, India
- Outsourced administration services based in Houston, United States
- Outsourced administration services based in New York, United States
- Outsourced administration services based in Australia
Company intelligence · public preview
Top 25 outsourced administration services based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,380 matching company records for outsourced administration services based in the United States, with 21,195 tracked contacts and 4,264 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 outsourced administration services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  IST Managementistmanagement.comHQ: Atlanta, GA, United StatesReported employees: 1,001-5,000 | Atlanta, GA, United States | 1,001-5,000 | Exact match | 921 contacts → |
“IST Management Services, Inc is an outsourcing company specializing in the life cycle management of your information: From incoming mail, to complex print jobs, to eDiscovery and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Coadvantagecoad.comHQ: Bradenton, FL, United StatesReported employees: 201-500 | Bradenton, FL, United States | 201-500 | Exact match | 586 contacts → |
“CoAdvantage is now CoAd.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  GSA Nationalgsanational.comHQ: Fairfax, VA, United StatesReported employees: 201-500 | Fairfax, VA, United States | 201-500 | Exact match | 558 contacts → |
“GSA National has been helping government contractors ensure compliance and streamline costs since 1991.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  OWN Business Managementobmworldwide.comHQ: Ajman Free Zone, United StatesReported employees: Not recorded | Ajman Free Zone, United States | Not recorded | Exact match | 490 contacts → |
“OBM is a leading business process management company in UAE which provides client driven business management solutions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Velan Info Servicesvelaninfo.comHQ: Dover, DE, United StatesReported employees: 201-500 | Dover, DE, United States | 201-500 | Exact match | 447 contacts → |
“Velan Info Services is a leading multidisciplinary service provider with its clients across the globe.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Cognetcognethro.comHQ: Orlando, FL, United StatesReported employees: 501-1,000 | Orlando, FL, United States | 501-1,000 | Exact match | 297 contacts → |
“CogNet is a leading Business Process Management (BPM) company supporting our partners in the Human Resource Services industry.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Pentegra Retirement Servicespentegra.comHQ: White Plains, NY, United StatesReported employees: 201-500 | White Plains, NY, United States | 201-500 | Exact match | 293 contacts → |
“Pentegra is a leading provider of retirement plan and fiduciary outsourcing solutions nationwide.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Stone Coast Fund Servicesstone-coast.comHQ: Portland, ME, United StatesReported employees: 201-500 | Portland, ME, United States | 201-500 | Exact match | 220 contacts → |
“Stone Coast Fund Services delivers comprehensive fund administration to alternative investment managers who expect more.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Seibelsseibels.comHQ: Columbia, SC, United StatesReported employees: 51-200 | Columbia, SC, United States | 51-200 | Exact match | 201 contacts → |
“Seibels offers the Property and Casualty Insurance industry and Financial Services industry business process outsourcing (BPO) services, and third-party administration (TPA)…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Viteos Fund Servicesviteos.com HQ: Somerset, NJ, United StatesReported employees: 501-1,000 | Somerset, NJ, United States | 501-1,000 | Exact match | 199 contacts → |
“Viteos has been rebranded following the acquisition by Intertrust Group, a world-leader in specialised administration services to clients in over 30 jurisdictions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Servicios Contablessccalop.com HQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 184 contacts → |
“Servicios Contables is an Executive Office company located in 115 Parker Rd, Houston, Texas, United States.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Countsycountsy.comHQ: Mountain View, CA, United StatesReported employees: 51-200 | Mountain View, CA, United States | 51-200 | Exact match | 160 contacts → |
“Countsy provides outsourced Accounting, HR/People Operations, Equity Administration, FP & A, and more for startups, scaleups, and spinouts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Insource Services, INCinsourceservices.com HQ: Wellesley, MA, United StatesReported employees: 51-200 | Wellesley, MA, United States | 51-200 | Exact match | 149 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 |  The Retirement Advantage, Inc. TRAtra401k.comHQ: Appleton, WI, United StatesReported employees: 201-500 | Appleton, WI, United States | 201-500 | Exact match | 142 contacts → |
“As a national retirement services company, The Retirement Advantage (TRA) provides third party administration and fiduciary services to plan sponsors, financial advisors, wealth…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Your Remote Assistantyourremoteassistant.comHQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 142 contacts → |
“Your Remote Assistant is the go-to partner of many investors and startups for administrative manpower because of our high caliber assistants who are smart, experienced, and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | GLC Business Servicesglcbs.com HQ: Rochester, NY, United StatesReported employees: 201-500 | Rochester, NY, United States | 201-500 | Exact match | 126 contacts → |
“GLC Business Services provides professional organizations with customer service focused on-site support.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Avitus Groupavitusgroup.comHQ: Billings, MT, United StatesReported employees: 201-500 | Billings, MT, United States | 201-500 | Exact match | 123 contacts → |
“Avitus Group is a worldwide company that simplifies, strengthens and grows businesses by providing administrative support (Payroll, accounting, taxes, HR and much more.) When a…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Pomco Grouppomco.com HQ: Syracuse, NY, United StatesReported employees: 501-1,000 | Syracuse, NY, United States | 501-1,000 | Exact match | 122 contacts → |
“POMCO is one of the nation’s largest third party administrators offering customized, fully - integrated benefits programs to a broad spectrum of organizations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Driasidriasi.comHQ: Chanhassen, MN, United StatesReported employees: 51-200 | Chanhassen, MN, United States | 51-200 | Exact match | 104 contacts → |
“driasi is a leading provider of outsourced administrative solutions tailored to the insurance industry, and a preferred partner to many of North America's best-known brands.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Clutch Groupmoraeglobal.comHQ: Houston, TX, United StatesReported employees: Not recorded | Houston, TX, United States | Not recorded | Exact match | 90 contacts → |
“A company that provides business services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Cobalt Medplanscobaltmedplans.comHQ: Overland Park, KS, United StatesReported employees: 201-500 | Overland Park, KS, United States | 201-500 | Exact match | 82 contacts → |
“Cobalt MedPlans is an outsourcing partner with core competencies in high end Claims Administration and Contact Center services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Yuvii Consultancy Private Limitedyuviiconsultancy.com HQ: Acworth, GA, United StatesReported employees: 51-200 | Acworth, GA, United States | 51-200 | Exact match | 81 contacts → |
“In 2022, as businesses worldwide faced growing pressures, we realized that the biggest challenge wasn’t lack of talent or ideas-it was lack of support.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Advanstaff HRadvanstaff.comHQ: Las Vegas, NV, United StatesReported employees: 51-200 | Las Vegas, NV, United States | 51-200 | Exact match | 80 contacts → |
“AdvanStaff HR takes the headache out of HR so busy owners and lean HR teams can focus on running the business, not juggling paperwork.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Xenium HRxeniumhr.com HQ: Tualatin, OR, United StatesReported employees: 51-200 | Tualatin, OR, United States | 51-200 | Exact match | 79 contacts → |
“We believe that every business leader should have the opportunity to focus on serving their clients and growing their business, leaving the administrative duties of being an…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Blue Bell, PA, United StatesReported employees: 201-500 | Blue Bell, PA, United States | 201-500 | Exact match | 78 contacts → |
“HealthNow Administrative Services (HNAS) is a national administrator of custom-designed insured employee benefit programs.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,380 company matches
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Outsourced administration services: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,379 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,380 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Outsourced administration services by metro
Questions about this company list
What does Exact match mean for outsourced administration services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many outsourced administration services did RevenueBase find based in the United States?
The saved snapshot records 1,380 matching company records, 21,195 tracked contacts and 4,264 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Outsourced administration services by geography
- Outsourced administration services based in Sao Paulo, Brazil
- Outsourced administration services based in Ahmedabad, India
- Outsourced administration services based in Mumbai, India
- Outsourced administration services based in Houston, United States
- Outsourced administration services based in New York, United States
- Outsourced administration services based in Australia
- Outsourced administration services based in Belgium
- Outsourced administration services based in Brazil
- Outsourced administration services based in Canada
- Outsourced administration services based in Chile
- Outsourced administration services based in Colombia
- Outsourced administration services based in Denmark
Cite this list
RevenueBase Data Team. Top 25 outsourced administration services based in the United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/outsourced-administration-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Outsourced administration services based in Sao Paulo, Brazil
- Outsourced administration services based in Ahmedabad, India
- Outsourced administration services based in Mumbai, India
- Outsourced administration services based in Houston, United States
- Outsourced administration services based in New York, United States
- Outsourced administration services based in Australia
Company intelligence · public preview
Top 25 outsourced administration services based in the United States
RevenueBase records 1,380 matching company records for outsourced administration services based in the United States, with 21,195 tracked contacts and 4,264 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 outsourced administration services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | IST Managementistmanagement.com HQ: Atlanta, GA, United StatesReported employees: 1,001-5,000 | Atlanta, GA, United States | 1,001-5,000 | Exact match | 921 contacts → |
“IST Management Services, Inc is an outsourcing company specializing in the life cycle management of your information: From incoming mail, to complex print jobs, to eDiscovery and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Coadvantagecoad.com HQ: Bradenton, FL, United StatesReported employees: 201-500 | Bradenton, FL, United States | 201-500 | Exact match | 586 contacts → |
“CoAdvantage is now CoAd.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | GSA Nationalgsanational.com HQ: Fairfax, VA, United StatesReported employees: 201-500 | Fairfax, VA, United States | 201-500 | Exact match | 558 contacts → |
“GSA National has been helping government contractors ensure compliance and streamline costs since 1991.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | OWN Business Managementobmworldwide.com HQ: Ajman Free Zone, United StatesReported employees: Not recorded | Ajman Free Zone, United States | Not recorded | Exact match | 490 contacts → |
“OBM is a leading business process management company in UAE which provides client driven business management solutions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Velan Info Servicesvelaninfo.com HQ: Dover, DE, United StatesReported employees: 201-500 | Dover, DE, United States | 201-500 | Exact match | 447 contacts → |
“Velan Info Services is a leading multidisciplinary service provider with its clients across the globe.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Cognetcognethro.com HQ: Orlando, FL, United StatesReported employees: 501-1,000 | Orlando, FL, United States | 501-1,000 | Exact match | 297 contacts → |
“CogNet is a leading Business Process Management (BPM) company supporting our partners in the Human Resource Services industry.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Pentegra Retirement Servicespentegra.com HQ: White Plains, NY, United StatesReported employees: 201-500 | White Plains, NY, United States | 201-500 | Exact match | 293 contacts → |
“Pentegra is a leading provider of retirement plan and fiduciary outsourcing solutions nationwide.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Stone Coast Fund Servicesstone-coast.com HQ: Portland, ME, United StatesReported employees: 201-500 | Portland, ME, United States | 201-500 | Exact match | 220 contacts → |
“Stone Coast Fund Services delivers comprehensive fund administration to alternative investment managers who expect more.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Seibelsseibels.com HQ: Columbia, SC, United StatesReported employees: 51-200 | Columbia, SC, United States | 51-200 | Exact match | 201 contacts → |
“Seibels offers the Property and Casualty Insurance industry and Financial Services industry business process outsourcing (BPO) services, and third-party administration (TPA)…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Viteos Fund Servicesviteos.com HQ: Somerset, NJ, United StatesReported employees: 501-1,000 | Somerset, NJ, United States | 501-1,000 | Exact match | 199 contacts → |
“Viteos has been rebranded following the acquisition by Intertrust Group, a world-leader in specialised administration services to clients in over 30 jurisdictions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Servicios Contablessccalop.com HQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 184 contacts → |
“Servicios Contables is an Executive Office company located in 115 Parker Rd, Houston, Texas, United States.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Countsycountsy.com HQ: Mountain View, CA, United StatesReported employees: 51-200 | Mountain View, CA, United States | 51-200 | Exact match | 160 contacts → |
“Countsy provides outsourced Accounting, HR/People Operations, Equity Administration, FP & A, and more for startups, scaleups, and spinouts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Insource Services, INCinsourceservices.com HQ: Wellesley, MA, United StatesReported employees: 51-200 | Wellesley, MA, United States | 51-200 | Exact match | 149 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 | The Retirement Advantage, Inc. TRAtra401k.com HQ: Appleton, WI, United StatesReported employees: 201-500 | Appleton, WI, United States | 201-500 | Exact match | 142 contacts → |
“As a national retirement services company, The Retirement Advantage (TRA) provides third party administration and fiduciary services to plan sponsors, financial advisors, wealth…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Your Remote Assistantyourremoteassistant.com HQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 142 contacts → |
“Your Remote Assistant is the go-to partner of many investors and startups for administrative manpower because of our high caliber assistants who are smart, experienced, and…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | GLC Business Servicesglcbs.com HQ: Rochester, NY, United StatesReported employees: 201-500 | Rochester, NY, United States | 201-500 | Exact match | 126 contacts → |
“GLC Business Services provides professional organizations with customer service focused on-site support.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Avitus Groupavitusgroup.com HQ: Billings, MT, United StatesReported employees: 201-500 | Billings, MT, United States | 201-500 | Exact match | 123 contacts → |
“Avitus Group is a worldwide company that simplifies, strengthens and grows businesses by providing administrative support (Payroll, accounting, taxes, HR and much more.) When a…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Pomco Grouppomco.com HQ: Syracuse, NY, United StatesReported employees: 501-1,000 | Syracuse, NY, United States | 501-1,000 | Exact match | 122 contacts → |
“POMCO is one of the nation’s largest third party administrators offering customized, fully - integrated benefits programs to a broad spectrum of organizations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Driasidriasi.com HQ: Chanhassen, MN, United StatesReported employees: 51-200 | Chanhassen, MN, United States | 51-200 | Exact match | 104 contacts → |
“driasi is a leading provider of outsourced administrative solutions tailored to the insurance industry, and a preferred partner to many of North America's best-known brands.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Clutch Groupmoraeglobal.com HQ: Houston, TX, United StatesReported employees: Not recorded | Houston, TX, United States | Not recorded | Exact match | 90 contacts → |
“A company that provides business services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Cobalt Medplanscobaltmedplans.com HQ: Overland Park, KS, United StatesReported employees: 201-500 | Overland Park, KS, United States | 201-500 | Exact match | 82 contacts → |
“Cobalt MedPlans is an outsourcing partner with core competencies in high end Claims Administration and Contact Center services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Yuvii Consultancy Private Limitedyuviiconsultancy.com HQ: Acworth, GA, United StatesReported employees: 51-200 | Acworth, GA, United States | 51-200 | Exact match | 81 contacts → |
“In 2022, as businesses worldwide faced growing pressures, we realized that the biggest challenge wasn’t lack of talent or ideas-it was lack of support.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Advanstaff HRadvanstaff.com HQ: Las Vegas, NV, United StatesReported employees: 51-200 | Las Vegas, NV, United States | 51-200 | Exact match | 80 contacts → |
“AdvanStaff HR takes the headache out of HR so busy owners and lean HR teams can focus on running the business, not juggling paperwork.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Xenium HRxeniumhr.com HQ: Tualatin, OR, United StatesReported employees: 51-200 | Tualatin, OR, United States | 51-200 | Exact match | 79 contacts → |
“We believe that every business leader should have the opportunity to focus on serving their clients and growing their business, leaving the administrative duties of being an…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | HQ: Blue Bell, PA, United StatesReported employees: 201-500 | Blue Bell, PA, United States | 201-500 | Exact match | 78 contacts → |
“HealthNow Administrative Services (HNAS) is a national administrator of custom-designed insured employee benefit programs.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,380 company matches
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Outsourced administration services: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,379 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,380 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Outsourced administration services by metro
Questions about this company list
What does Exact match mean for outsourced administration services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many outsourced administration services did RevenueBase find based in the United States?
The saved snapshot records 1,380 matching company records, 21,195 tracked contacts and 4,264 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Outsourced administration services by geography
- Outsourced administration services based in Sao Paulo, Brazil
- Outsourced administration services based in Ahmedabad, India
- Outsourced administration services based in Mumbai, India
- Outsourced administration services based in Houston, United States
- Outsourced administration services based in New York, United States
- Outsourced administration services based in Australia
- Outsourced administration services based in Belgium
- Outsourced administration services based in Brazil
- Outsourced administration services based in Canada
- Outsourced administration services based in Chile
- Outsourced administration services based in Colombia
- Outsourced administration services based in Denmark
Cite this list
RevenueBase Data Team. Top 25 outsourced administration services based in the United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/outsourced-administration-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Outsourced administration services based in Ahmedabad, India
- Outsourced administration services based in Mumbai, India
- Outsourced administration services based in Houston, United States
- Outsourced administration services based in New York, United States
- Outsourced administration services based in Australia