Company lists · Data verified August 2026
Top 11 Call centers based in Houston, United States
Use this directory to identify 29 call centers based in Houston, United States, with 1,405 listed contacts and 122 listed email addresses. The directory was last updated in August 2026; New York is the single most-represented city among the companies on the list.
Call centers handle inbound and outbound phone interactions for clients, including customer service, sales, technical support, appointment setting, and other business communications. This list covers companies that provide call center services directly to businesses or organizations, including inbound, outbound, customer service, sales, support, and appointment-setting operations. Ranked by team size, largest first. Data current as of August 28, 2026.
The 11 largest call centers based in Houston, United States
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 |  The Call Center Doctors | 5 |
| 2 |  Supportzebra | 99 |
| 3 |  S4 Communications | 4 |
| 4 |  Jasper IT Pvt.Ltd | 1 |
| 5 |  Atpoint | 3 |
| 6 |  Great Virtual Services | 2 |
| 7 |  DFS Worldwide | 1 |
| 8 |  NEW Wave Power LLC | 1 |
| 9 |  V Assist PRO INC | 1 |
| 10 |  Callbright Corporation | 1 |
| 11 | Ad2 Telecommunication Corporation | 1 |
Showing 11 of 29 call centers based in Houston, United States
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Call centers based in Houston, United States at a glance
As of Aug 28, 2026Companies by employee count
Call centers by metro in the United States
| Metro | Companies |
|---|---|
| Call centers in New York | 30 |
| Call centers in Miami | 30 |
| Call centers in Houston | 29 |
| Call centers in Atlanta | 21 |
| Call centers in Los Angeles | 19 |
| Call centers in Orlando | 17 |
| Call centers in Sheridan | 17 |
How this list was built
- Source
- The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
- Inclusion
- Companies whose own business descriptions match “call centers”, with match quality audited by blind human judging, and headquartered in Houston, United States.
- 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
- Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
- Refresh
- Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.
Frequently asked
How many call centers are listed based in Houston, United States?
29 call centers are listed based in Houston, United States, with 1,405 contacts and 122 email addresses provided.
Which city has the most call centers in this list?
New York is the single most-represented city among the companies on the list.
How can I contact call centers in this directory?
The directory includes 1,405 listed contacts and 122 listed email addresses for the call centers included.
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Call centers by geography
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About this data
RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.