Company lists · Data refreshed September 2026
Top 25 Inbound call centers based in the United States
RevenueBase identified 698 inbound call centers headquartered in the United States as of September 2026 and tracks 39,261 professional contacts across them, including 3,151 with verified work emails and 8,627 with mobile numbers. Houston is the largest hub.
This list covers inbound call centers 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 inbound call centers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,125 | ||||
“Email: info@Telvista.com Telvista is a premier provider of contact solutions that drive customer loyalty and create competitive advantage for our clients.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,779 | ||||
“Advanced Call Center Technologies, LLC (ACT) is a premier provider of domestic (USA), near shore and far shore outsourced call center services to the financial services, mortgage…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,024 | ||||
“Human-Led, Tech-Powered Customer Service For over 25 years, Liveops has redefined customer support by combining technology with real human connection.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,773 | ||||
“InfoCision is an award-winning contact center partner trusted by leading brands for over 40 years.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,044 | ||||
“Valor Global is a global leader in providing extraordinary customer experiences for clients across the globe.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 905 | ||||
“Our Company Inktel is a leading business process outsourcer that specializes in creating personalized call center solutions which enable our clients to increase market share…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 892 | ||||
“If you are interested in growing your business or increasing efficiency, AnswerNet has the expertise, technology, and people to help you take your company to new heights!” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | Nexrep, LLCPartial evidence | 861 | |||
“NexRep is a leader in virtual contact center solutions, with more than 100 years of combined contact center leadership.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 838 | ||||
“CBE Companies is the parent organization of CBE Customer Solutions and CBE Group.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 793 | ||||
“Focus was founded in 1995.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 542 | ||||
“We are customer service experts.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 513 | ||||
“ContactUs Communications is a U.S.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 508 | ||||
“Coast is a top-performing call center services company that specializes in onshore omni-channel solutions, accounts receivable management, and back-office functions for public and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 480 | ||||
“Activus Connect is a premium provider of Customer Experience Outsourced Solutions, operating across the Continental US & Puerto Rico.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 452 | ||||
“SupportZebra is a business process outsourcing company based in the Philippines, with headquarters in the Houston,TX region, that specializes in: Sales & Marketing Retention |…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 429 | ||||
“About : Ansafone is the leading outsourced contact center solution provider for companies in the US and Canada and maintains international alliances for global reach.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 353 | ||||
“For over 35 years, The Connection has made a name for ourselves becoming one of the top industry partners to Fortune 500 companies looking to outsource their contact center…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | Five Star Call CentersStrong evidence | 312 | |||
“Five Star Call Centers is a onshore and nearshore contact center outsourcer where we deliver outrageously amazing customer experiences for our clients and their customers.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | Teledirect Call CentersStrong evidence | 309 | |||
“TeleDirect provides 24/7 U.S-based call center and answering services for organizations that cannot afford to miss important calls.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 288 | ||||
“Current Vertical Focus: Real Estate - Lead Generation, Lead Conversion, Lead Qualification, Agent Recruiting Mortgage - Lead Conversion, Lead Qualification Insurance - Lead…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 254 | ||||
“Boomsourcing (A Fusion CX Company) is a call center established in 2007.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | Rocket ConnectionsPartial evidence | 248 | |||
“Rocket Connections is a sales and support platform specializing in contact center services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 235 | ||||
“CONTACT CENTER SERVICES INNOVATIVE, HIGH-PERFORMANCE SOLUTIONS THAT WORK Mass Markets executes domestic omni-channel, inbound and outbound contact center services on behalf of…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 216 | ||||
“Schedule your FREE Consultation here: http://bit.ly/2gUckQb Anomaly Squared is a contact center services provider.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 200 | ||||
“Ceequence is an ISO 27001 company that operates a 250-seat call center in Chennai, India, with state-of-the-art technology and experienced customer service professionals for…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 698 inbound call centers based in the United States
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Inbound call centers based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 inbound call centers, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “inbound call centers”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among inbound call centers, 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 an evidence 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, 3,151 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 3, 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
How many inbound call centers are there based in the United States?
RevenueBase identified 698 inbound call centers 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?
Telvista, headquartered in Dallas, tops this list with the largest team on record.
Which city has the most inbound call centers?
Houston leads with 22 headquartered companies, followed by Miami (17) and Los Angeles (13).
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 3,151 verified decision-maker contacts tracked across these 698 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 3, 2026.
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Inbound call centers by geography
- Inbound call centers based in the United Kingdom
- Inbound call centers based in Italy
- Inbound call centers based in Canada
- Inbound call centers based in Germany
- Inbound call centers based in Brazil
- Inbound call centers based in France
- Inbound call centers based in the Netherlands
- Inbound call centers based in Mexico
- Inbound call centers based in Spain
- Inbound call centers based in South Africa
- Inbound call centers based in Poland
- Inbound call centers based in Australia
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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 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.