Company lists · Data refreshed September 2026
Top 25 Quality assurance companies for contact centers based in the United States
RevenueBase identified 144 quality assurance companies for contact centers headquartered in the United States as of September 2026 and tracks 5,836 professional contacts across them, including 874 with verified work emails. Los Angeles is the largest hub.
This list covers quality assurance companies for contact 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 29, 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.
The 25 largest quality assurance companies for contact centers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 478 contacts → | ||||
Strong evidence “Alvaria CX, the global leader in contact center solutions, emerged from the 2021 merger of Noble Systems and Aspect, bringing over 50 years of CX innovation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 415 contacts → | ||||
Indirect evidence “For 15 years, Astegic has been helping Fortune 500 through startup companies with their Testing & QA needs.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 329 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 264 contacts → | ||||
Indirect evidence “ExpertCallers (a division of Flatworld Solutions) is a global consulting and outsourcing company, with a wealth of experience in providing operational and strategic excellence to…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 249 contacts → | ||||
Partial evidence “Quality in An AI Driven World.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 235 contacts → | ||||
Strong evidence “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: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 211 contacts → | ||||
Partial evidence “Pro QC International provides tailored quality solutions with a human touch in 100 countries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 182 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 171 contacts → | ||||
Strong evidence “Zero Variance by Ubiquity is a leader in Contact Center Solutions, specializing in BPOaaS, AI Technology, CX Services, Business Intelligence, Data Analytics, and QA Professional…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 161 contacts → | ||||
Strong evidence “J.Lodge first opened its doors in and has become the recognized leader in the science of contact center monitoring and analysis.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 155 contacts → | ||||
Strong evidence “BPA Quality is a woman owned business that provides contact centers with the insights to engineer great customer experiences every time through our expertise in quality…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 140 contacts → | ||||
Indirect evidence “LimoLink doesn’t just provide the best service in the industry; we provide the best service in any industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 97 contacts → | ||||
Strong evidence “CCS provides around-the-clock contact center services for businesses of every size in all industries.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 80 contacts → | ||||
Strong evidence “Tech-Enabled Outsourcing Experts for Your Contact Center Needs Premier NX (formerly Stafford Communications) provides world-class contact center outsourcing services globally…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 78 contacts → | ||||
Partial evidence “SQM GROUP SQM Group is a software company specializing in automated QA for call center agents.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 58 contacts → | ||||
Partial evidence “Mktg, Inc, with 31 years of data collection expertise, has always had a reputation for quality data collection.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 49 contacts → | ||||
Strong evidence “Concentra Solutions maximizes contact center performance through Quality Assurance, specializing in Compliance and Customer Experience.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 41 contacts → | ||||
Partial evidence “We believe in quality without compromise, and resolve quality issues more efficiently, and accurately, by holding ourselves to a documented, higher standard.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 27 contacts → | ||||
Strong evidence “Quality Contact Solutions provides quality call center solutions that achieve sales results.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 25 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 24 contacts → | ||||
Partial evidence “Company Overview: Founded in 2004, DCC / CCR is a 200-seat call center located in Superior, Wisconsin sitting right across the bay from Duluth, Minnesota on Lake Superior.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 23 contacts → | ||||
Strong evidence “Customer Research, Inc.(CRI) has provided customer satisfaction measurement, customer loyalty, market research, and contact center solutions since 1967.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 contacts → | ||||
Partial evidence “HQC provides services for Call Centers, DME's and Pharmacies across the US and Canada.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 21 contacts → | ||||
Strong evidence “MiaRec is an AI-native conversation intelligence platform that helps contact centers turn customer interactions into actionable business insights.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 20 contacts → | ||||
Strong evidence “Contact Center Compliance Solved.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: quality assurance companies for contact centers. 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 quality assurance companies for contact centers.
- Partial evidence
- Its own public description names part of quality assurance companies for contact centers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name quality assurance companies for contact centers. 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 144 quality assurance companies for contact centers based in the United States
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Quality assurance companies for contact centers based in the United States at a glance
As of Sep 29, 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 144 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 quality assurance companies for contact centers, 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 “quality assurance companies for contact centers”. 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 quality assurance companies for contact centers), 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 quality assurance companies for contact 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 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, 874 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 29, 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 quality assurance companies for contact centers, 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 quality assurance companies for contact centers are there based in the United States?
RevenueBase identified 144 quality assurance companies for contact 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?
Alvaria CX, headquartered in Atlanta, tops this list with the largest team on record.
Which city has the most quality assurance companies for contact centers?
Los Angeles leads with 4 headquartered companies, followed by New York (4) and Atlanta (3).
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 874 verified decision-maker contacts tracked across these 144 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 29, 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.
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