Company lists · Data refreshed September 2026

Top 25 Administrative support services based in the United States

Name: Administrative support services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 543 companies tracked

RevenueBase identified 543 administrative support services headquartered in the United States as of September 2026 and tracks 3,146 professional contacts across them, including 296 with verified work emails. Atlanta is the largest hub.

This list covers administrative support services headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

543Companies

3,146Contacts tracked

296Verified emails

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The 25 largest administrative support services based in the United States

Ranked by team size

Top 25 of 543 administrative support services based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to administrative support services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Servicios Contables	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	201-500	184 contacts →
	Indirect evidence “Servicios Contables is an Executive Office company located in 115 Parker Rd, Houston, Texas, United States.” Source: RevenueBase Database · checked Sep 19, 2026
2	GLC Business Services	Partial evidence	Rochester, NY, United StatesHQ checked Sep 19, 2026	201-500	126 contacts →
	Partial evidence “GLC Business Services provides professional organizations with customer service focused on-site support.” Source: RevenueBase Database · checked Sep 19, 2026
3	Alliance For Nonprofit Resources	Partial evidence	Butler, PA, United StatesHQ checked Sep 19, 2026	51-200	73 contacts →
	Partial evidence “Alliance for Nonprofit Resources (ANR) was founded to provide affordable administrative services to businesses and nonprofits of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
4	Legal & Administrative Assistants, INC	Partial evidence	New London, MN, United StatesHQ checked Sep 19, 2026	n/a	63 contacts →
	Partial evidence “LAA provides high-quality experienced administrative assistance on an as-needed basis with emphasis and specialization in the legal field.” Source: RevenueBase Database · checked Sep 19, 2026
5	Chaves Consulting, INC	Indirect evidence	Baker City, United StatesHQ checked Sep 19, 2026	51-200	30 contacts →
	Indirect evidence “Application Administrator Oregon Secretary of State Chaves Consulting, Inc: Beyond the Call®: Chaves Consulting, Inc.'s (CCI) state-of-the-art technology and superior customer…” Source: RevenueBase Database · checked Sep 19, 2026
6	Compmanagement Health Systems, INC	Indirect evidence	Dublin, OH, United StatesHQ checked Sep 19, 2026	51-200	20 contacts →
	Indirect evidence “Compmanagement Health Systems, Inc is an executive office company based out of Calle Laguna del Marquesado Nª 19, Nave 16 Edificio Adriana 1ª Planta, Polígono Industrial La Resina…” Source: RevenueBase Database · checked Sep 19, 2026
7	Virtual Office VA Staffing LLC	Strong evidence	Concord, NC, United StatesHQ checked Sep 19, 2026	11-50	19 contacts →
	Strong evidence “Professional Administrative Assistance - administrative & customer support, bookkeeping, data entry, answering service, research assistant, computer/software tech support…” Source: RevenueBase Database · checked Sep 19, 2026
8	CL Support Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	11-50	18 contacts →
	Partial evidence “CL Support Services offers business support services and consulting.” Source: RevenueBase Database · checked Sep 19, 2026
9	Diamond Solutions, INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 19, 2026	51-200	16 contacts →
	Partial evidence “Established in 2002, Diamond Solutions, Inc.(DSI) is a minority-owned and operated, certified 8(a) company based in Washington, DC that offers a diverse range of administrative…” Source: RevenueBase Database · checked Sep 19, 2026
10	ADR Support, LP	Partial evidence	Miami, FL, United StatesHQ checked Sep 19, 2026	11-50	15 contacts →
	Partial evidence “ADR Support is the ultimate "back office" support team built “by mediators for mediators”.” Source: RevenueBase Database · checked Sep 19, 2026
11	Total Solutions, INC	Partial evidence	Davenport, IA, United StatesHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial evidence “Total Solutions takes care of time-consuming administrative services so you can get back to growing your business with your creative vision.” Source: RevenueBase Database · checked Sep 19, 2026
12	Atomus Partners	Partial evidence	Dallas, United StatesHQ checked Sep 19, 2026	11-50	13 contacts →
	Partial evidence “Your organization deserves financial and people operations that support growth, not slow it down.” Source: RevenueBase Database · checked Sep 19, 2026
13	Valley Administrative Services, LLC	Strong evidence	Luray, VA, United StatesHQ checked Sep 19, 2026	1-10	9 contacts →
	Strong evidence “Valley Administrative Services, LLC is committed to providing its clients with reliable, professional administrative support and solutions that will give them the time and support…” Source: RevenueBase Database · checked Sep 19, 2026
14	VIS Alliance	Partial evidence	Toledo, OH, United StatesHQ checked Sep 19, 2026	1-10	8 contacts →
	Partial evidence “VIS Alliance supports all of your business needs.” Source: RevenueBase Database · checked Sep 19, 2026
15	Conversance Business Solutions LLC	Strong evidence	Rochester, NY, United StatesHQ checked Sep 19, 2026	1-10	8 contacts →
	Strong evidence “Conversance Business Solutions is an administrative support and consultancy firm that saves business people time and money by allowing them to outsource their administrative work…” Source: RevenueBase Database · checked Sep 19, 2026
16	Grace Dougan Consulting	Partial evidence	Novato, CA, United StatesHQ checked Sep 19, 2026	1-10	7 contacts →
	Partial evidence “Remote bookkeeping, scheduling, and administrative work.” Source: RevenueBase Database · checked Sep 19, 2026
17	Prudential Business Services	Partial evidence	Detroit, MI, United StatesHQ checked Sep 19, 2026	11-50	7 contacts →
	Partial evidence “High-level admin support to help you scale, without the overhead.” Source: RevenueBase Database · checked Sep 19, 2026
18	Targeted Solutions, LLC	Strong evidence	Fredericksburg, VA, United StatesHQ checked Sep 19, 2026	1-10	7 contacts →
	Strong evidence “Targeted Solutions, LLC provides world-class technical and administrative services and product support to public and private sector clients.” Source: RevenueBase Database · checked Sep 19, 2026
19	Your Admin Ninja	Indirect evidence	Dfw, TX, United StatesHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “If there are tasks that you have to do to allow your business to grow that you are not very good at, don't enjoy but need to be done (just not by you)- please consider reaching…” Source: RevenueBase Database · checked Sep 19, 2026
20	Project Pros	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Partial evidence “The Project Pros is a Tempe, Arizona based administrative services company founded in 2015 by Founder and CEO Lauri Erickson.” Source: RevenueBase Database · checked Sep 19, 2026
21	Jane Barr Horstman & Associates	Partial evidence	Fort Washington, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Partial evidence “We are administration and project management experts offering virtual and in-person personal assistance to small businesses, professionals and seniors.” Source: RevenueBase Database · checked Sep 19, 2026
22	Smartwork Service LLC	Indirect evidence	Atlanta, United StatesHQ checked Sep 19, 2026	11-50	6 contacts →
	Indirect evidence “A near shore staffing services company” Source: RevenueBase Database · checked Sep 19, 2026
23	Angie's At Your Service Virtual Assistance	Indirect evidence	Somerdale, NJ, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Do you know your $13 per hour employee may be costing you around $40 an hour (https://bizfluent.com/how-8098041-calculate-cost-per-hour-rate.html)?” Source: RevenueBase Database · checked Sep 19, 2026
24	The Operations Group	Indirect evidence	Venice, FL, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “We are experts at turning chaos into calm.” Source: RevenueBase Database · checked Sep 19, 2026
25	Office Mercenary Services	Partial evidence	Lakewood, CO, United StatesHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “Office Mercenary supports businesses and their owners in a wide range of tasks from basic admin to project and process development.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: administrative support services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names administrative support services.
Partial evidence: Its own public description names part of administrative support services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name administrative support services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 543 administrative support services based in the United States

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Administrative support services based in the United States at a glance

As of Sep 19, 2026

9.4%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · Atlanta

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

479

11-50

51-200

201-500

1,001-5,000

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 543 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among administrative support services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “administrative support services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names administrative support services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among administrative support services, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 296 across the full list. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names administrative support services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many administrative support services are there based in the United States?

RevenueBase identified 543 administrative support services headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Servicios Contables, headquartered in Houston, tops this list with the largest team on record.

Which city has the most administrative support services?

Atlanta leads with 17 headquartered companies, followed by Houston (12) and Los Angeles (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 296 verified decision-maker contacts tracked across these 543 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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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 Smart Search, 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.