Company lists · Data refreshed September 2026
Top 25 Api testing tools based in the United States
RevenueBase identified 91 company matches for api testing tools associated with the United States as of September 2026 and tracks 5,309 professional contacts across them, including 2,058 with verified work emails. San Francisco is the largest hub.
This list covers company matches for api testing tools 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 19, 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 api testing tools based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,269 contacts → | ||||
Exact match “Postman is the world’s leading API platform.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 2 | 969 contacts → | ||||
Exact match “SmartBear delivers application integrity for modern tech stacks, ensuring continuous, measurable assurance that software just works as intended – with governance to operate at AI…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 3 | 382 contacts → | ||||
Exact match “Katalon True Platform - the AI Platform for Software Quality.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 4 | 221 contacts → | ||||
Exact match “ACCELQ is the only cloud-based continuous testing platform that seamlessly automates API and web testing without writing a single line of code.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 5 | 221 contacts → | ||||
Exact match “Parasoft helps organizations continuously deliver quality software with its market-proven, integrated suite of automated software testing tools.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 6 | 119 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 7 | 92 contacts → | ||||
Exact match “mabl is the agentic testing platform that gives you coverage that builds itself, runs itself, and recovers itself so teams can ship at the speed of AI coding agents with…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 8 | 91 contacts → | ||||
Exact match “Cypress is a quality testing platform that brings together the open-source Cypress App tool and the Cypress Cloud platform, supporting the entire testing lifecycle.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 9 | 90 contacts → | ||||
Exact match “Founded in and located in metro Denver, Colorado, iBeta Quality Assurance specializes in “QA on Demand” for software: functionality, compatibility, security, load/performance…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 10 | 87 contacts → | ||||
Exact match “Verifaya is the new-age automated testing software provider that helps businesses overcome their testing challenges and accelerate business growth.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 11 | 49 contacts → | ||||
Exact match “Karate is the only open-source tool to combine API test-automation, mocks, performance-testing and even UI automation into a single, unified framework.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 12 | 46 contacts → | ||||
Exact match “Cycle Labs delivers enterprise-grade automated testing solutions that accelerate software delivery and reduce risk across complex systems.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 13 | 34 contacts → | ||||
Exact match “Here at Qameta Software, we work hard to deliver the best software quality solutions for professionals.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 14 | 21 contacts → | ||||
Exact match “Better Code Through Automation 3Qi Labs launched in 2010 with a simple goal: Help enterprise application development and QA teams use test automation effectively.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 15 | 21 contacts → | ||||
Exact match “Ranorex offers innovative test automation solutions that help more than users worldwide deliver high-quality desktop, web and mobile applications.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 16 | 20 contacts → | ||||
Exact match “Radically simplifying Web and API Security Testing NightVision brings application security testing into the modern development workflow.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 17 | 17 contacts → | ||||
Exact match “Loadmill builds AI agents that test mobile applications like real users.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 18 | 17 contacts → | ||||
Exact match “APIContext provides outside-in application testing that replicates how your users access your apps.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 19 | 15 contacts → | ||||
Exact match “tracetronic inc delivers a modular framework with streamlined solutions for software test automation, execution, orchestration, and analysis for end-to-end software development.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 20 | 14 contacts → | ||||
Exact match “Covlant is transforming how software teams approach quality assurance, making it smarter and more efficient with AI.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 21 | 14 contacts → | ||||
Exact match “At PFLB, we're dedicated to helping technology teams scale and optimize their applications with our robust performance testing platform and professional engineering services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 22 | 13 contacts → | ||||
Exact match “Skyramp is an AI-driven testing platform that acts like a personal QA engineer for your development team.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 23 | 13 contacts → | ||||
Exact match “Kerno autonomously writes, runs and maintains integration tests in your IDE covering every corner of your backend codebase so you can ship fast without breaking anything.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 24 | 11 contacts → | ||||
Exact match “AI creates your API collections and writes Automation tests without any manual efforts.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 25 | 9 contacts → | ||||
Exact match “Early is for engineering, QA, and release leaders at organizations where a production regression is expensive to diagnose and slow to recover from.” Recorded in the RevenueBase company graph · Sep 19, 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 “api testing tools”. 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 91 api testing tools based in the United States
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Api testing tools based in the United States at a glance
As of Sep 19, 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 91 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 “api testing tools” 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 2,058 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 19, 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.
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 “api testing tools”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many api testing tools are there based in the United States?
RevenueBase identified 91 company matches for api testing tools 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?
Postman tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most api testing tools?
San Francisco leads with 13 company records, followed by New York (5) and Austin (4).
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 2,058 professional contacts with verified work emails tracked across these 91 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 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 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.
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Company intelligence · public preview
Top 25 api testing tools 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 91 matching company records for api testing tools based in the United States, with 5,309 tracked contacts and 2,058 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 19, 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 api testing tools 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 |  Postmanpostman.comHQ: San Francisco, CA, United StatesReported employees: 501-1,000 | San Francisco, CA, United States | 501-1,000 | Exact match | 2,269 contacts → |
“Postman is the world’s leading API platform.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Smartbearsmartbear.comHQ: Somerville, MA, United StatesReported employees: 501-1,000 | Somerville, MA, United States | 501-1,000 | Exact match | 969 contacts → |
“SmartBear delivers application integrity for modern tech stacks, ensuring continuous, measurable assurance that software just works as intended – with governance to operate at AI…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Katalonkatalon.comHQ: Atlanta, GA, United StatesReported employees: 201-500 | Atlanta, GA, United States | 201-500 | Exact match | 382 contacts → |
“Katalon True Platform - the AI Platform for Software Quality.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Accelqaccelq.comHQ: Dallas, TX, United StatesReported employees: 201-500 | Dallas, TX, United States | 201-500 | Exact match | 221 contacts → |
“ACCELQ is the only cloud-based continuous testing platform that seamlessly automates API and web testing without writing a single line of code.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Parasoftparasoft.comHQ: Monrovia, CA, United StatesReported employees: 201-500 | Monrovia, CA, United States | 201-500 | Exact match | 221 contacts → |
“Parasoft helps organizations continuously deliver quality software with its market-proven, integrated suite of automated software testing tools.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Appperfect Corpappperfect.comHQ: Cupertino, CA, United StatesReported employees: 51-200 | Cupertino, CA, United States | 51-200 | Exact match | 119 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 7 |  MABLmabl.comHQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 92 contacts → |
“mabl is the agentic testing platform that gives you coverage that builds itself, runs itself, and recovers itself so teams can ship at the speed of AI coding agents with…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  cypress.iocypress.ioHQ: Atlanta, GA, United StatesReported employees: 51-200 | Atlanta, GA, United States | 51-200 | Exact match | 91 contacts → |
“Cypress is a quality testing platform that brings together the open-source Cypress App tool and the Cypress Cloud platform, supporting the entire testing lifecycle.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Ibeta Quality Assuranceibeta.comHQ: Aurora, CO, United StatesReported employees: 51-200 | Aurora, CO, United States | 51-200 | Exact match | 90 contacts → |
“Founded in and located in metro Denver, Colorado, iBeta Quality Assurance specializes in “QA on Demand” for software: functionality, compatibility, security, load/performance…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Verifaya Corporationverifaya.comHQ: Milpitas, CA, United StatesReported employees: 51-200 | Milpitas, CA, United States | 51-200 | Exact match | 87 contacts → |
“Verifaya is the new-age automated testing software provider that helps businesses overcome their testing challenges and accelerate business growth.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Karate Labskaratelabs.ioHQ: Sugar Land, TX, United StatesReported employees: Not recorded | Sugar Land, TX, United States | Not recorded | Exact match | 49 contacts → |
“Karate is the only open-source tool to combine API test-automation, mocks, performance-testing and even UI automation into a single, unified framework.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Cycle Labscyclelabs.ioHQ: Raleigh, NC, United StatesReported employees: 11-50 | Raleigh, NC, United States | 11-50 | Exact match | 46 contacts → |
“Cycle Labs delivers enterprise-grade automated testing solutions that accelerate software delivery and reduce risk across complex systems.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Qameta Softwareqameta.ioHQ: Fairfax, VA, United StatesReported employees: 11-50 | Fairfax, VA, United States | 11-50 | Exact match | 34 contacts → |
“Here at Qameta Software, we work hard to deliver the best software quality solutions for professionals.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  3qi Labs3qilabs.comHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 21 contacts → |
“Better Code Through Automation 3Qi Labs launched in 2010 with a simple goal: Help enterprise application development and QA teams use test automation effectively.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Ranorexranorex.comHQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 21 contacts → |
“Ranorex offers innovative test automation solutions that help more than users worldwide deliver high-quality desktop, web and mobile applications.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Nightvisionnightviz.aiHQ: Remote, United StatesReported employees: 11-50 | Remote, United States | 11-50 | Exact match | 20 contacts → |
“Radically simplifying Web and API Security Testing NightVision brings application security testing into the modern development workflow.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Loadmillloadmill.com HQ: Palo Alto, CA, United StatesReported employees: 11-50 | Palo Alto, CA, United States | 11-50 | Exact match | 17 contacts → |
“Loadmill builds AI agents that test mobile applications like real users.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Apicontextapicontext.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 17 contacts → |
“APIContext provides outside-in application testing that replicates how your users access your apps.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Tracetronic INCtracetronic.com HQ: Troy, MI, United StatesReported employees: 11-50 | Troy, MI, United States | 11-50 | Exact match | 15 contacts → |
“tracetronic inc delivers a modular framework with streamlined solutions for software test automation, execution, orchestration, and analysis for end-to-end software development.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Covlantcovlant.ai HQ: Sacramento, CA, United StatesReported employees: 1-10 | Sacramento, CA, United States | 1-10 | Exact match | 14 contacts → |
“Covlant is transforming how software teams approach quality assurance, making it smarter and more efficient with AI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | PFLBpflb.us HQ: Mountain View, CA, United StatesReported employees: 1-10 | Mountain View, CA, United States | 1-10 | Exact match | 14 contacts → |
“At PFLB, we're dedicated to helping technology teams scale and optimize their applications with our robust performance testing platform and professional engineering services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Skyrampskyramp.dev HQ: Sf Bay, United StatesReported employees: 11-50 | Sf Bay, United States | 11-50 | Exact match | 13 contacts → |
“Skyramp is an AI-driven testing platform that acts like a personal QA engineer for your development team.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  KERNOkerno.ioHQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 13 contacts → |
“Kerno autonomously writes, runs and maintains integration tests in your IDE covering every corner of your backend codebase so you can ship fast without breaking anything.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | qodex.aiqodex.ai HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 11 contacts → |
“AI creates your API collections and writes Automation tests without any manual efforts.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Early Technologiesstartearly.ai HQ: Wilmington, DE, United StatesReported employees: 11-50 | Wilmington, DE, United States | 11-50 | Exact match | 9 contacts → |
“Early is for engineering, QA, and release leaders at organizations where a production regression is expensive to diagnose and slow to recover from.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 91 company matches
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Api testing tools: dataset insights
September 19, 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
91 records in the displayed employee bands.
0 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 91 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 19, 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 ↗
Questions about this company list
What does Exact match mean for api testing tools?
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 api testing tools did RevenueBase find based in the United States?
The saved snapshot records 91 matching company records, 5,309 tracked contacts and 2,058 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 19, 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
Api testing tools by geography
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 api testing tools based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/api-testing-tools/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
- Api testing tools based in India
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
Company intelligence · public preview
Top 25 api testing tools based in the United States
RevenueBase records 91 matching company records for api testing tools based in the United States, with 5,309 tracked contacts and 2,058 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 19, 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 api testing tools 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 | Postmanpostman.com HQ: San Francisco, CA, United StatesReported employees: 501-1,000 | San Francisco, CA, United States | 501-1,000 | Exact match | 2,269 contacts → |
“Postman is the world’s leading API platform.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Smartbearsmartbear.com HQ: Somerville, MA, United StatesReported employees: 501-1,000 | Somerville, MA, United States | 501-1,000 | Exact match | 969 contacts → |
“SmartBear delivers application integrity for modern tech stacks, ensuring continuous, measurable assurance that software just works as intended – with governance to operate at AI…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Katalonkatalon.com HQ: Atlanta, GA, United StatesReported employees: 201-500 | Atlanta, GA, United States | 201-500 | Exact match | 382 contacts → |
“Katalon True Platform - the AI Platform for Software Quality.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Accelqaccelq.com HQ: Dallas, TX, United StatesReported employees: 201-500 | Dallas, TX, United States | 201-500 | Exact match | 221 contacts → |
“ACCELQ is the only cloud-based continuous testing platform that seamlessly automates API and web testing without writing a single line of code.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Parasoftparasoft.com HQ: Monrovia, CA, United StatesReported employees: 201-500 | Monrovia, CA, United States | 201-500 | Exact match | 221 contacts → |
“Parasoft helps organizations continuously deliver quality software with its market-proven, integrated suite of automated software testing tools.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Appperfect Corpappperfect.com HQ: Cupertino, CA, United StatesReported employees: 51-200 | Cupertino, CA, United States | 51-200 | Exact match | 119 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 7 | MABLmabl.com HQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 92 contacts → |
“mabl is the agentic testing platform that gives you coverage that builds itself, runs itself, and recovers itself so teams can ship at the speed of AI coding agents with…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | cypress.iocypress.io HQ: Atlanta, GA, United StatesReported employees: 51-200 | Atlanta, GA, United States | 51-200 | Exact match | 91 contacts → |
“Cypress is a quality testing platform that brings together the open-source Cypress App tool and the Cypress Cloud platform, supporting the entire testing lifecycle.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Ibeta Quality Assuranceibeta.com HQ: Aurora, CO, United StatesReported employees: 51-200 | Aurora, CO, United States | 51-200 | Exact match | 90 contacts → |
“Founded in and located in metro Denver, Colorado, iBeta Quality Assurance specializes in “QA on Demand” for software: functionality, compatibility, security, load/performance…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Verifaya Corporationverifaya.com HQ: Milpitas, CA, United StatesReported employees: 51-200 | Milpitas, CA, United States | 51-200 | Exact match | 87 contacts → |
“Verifaya is the new-age automated testing software provider that helps businesses overcome their testing challenges and accelerate business growth.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Karate Labskaratelabs.io HQ: Sugar Land, TX, United StatesReported employees: Not recorded | Sugar Land, TX, United States | Not recorded | Exact match | 49 contacts → |
“Karate is the only open-source tool to combine API test-automation, mocks, performance-testing and even UI automation into a single, unified framework.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Cycle Labscyclelabs.io HQ: Raleigh, NC, United StatesReported employees: 11-50 | Raleigh, NC, United States | 11-50 | Exact match | 46 contacts → |
“Cycle Labs delivers enterprise-grade automated testing solutions that accelerate software delivery and reduce risk across complex systems.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Qameta Softwareqameta.io HQ: Fairfax, VA, United StatesReported employees: 11-50 | Fairfax, VA, United States | 11-50 | Exact match | 34 contacts → |
“Here at Qameta Software, we work hard to deliver the best software quality solutions for professionals.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | 3qi Labs3qilabs.com HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 21 contacts → |
“Better Code Through Automation 3Qi Labs launched in 2010 with a simple goal: Help enterprise application development and QA teams use test automation effectively.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Ranorexranorex.com HQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 21 contacts → |
“Ranorex offers innovative test automation solutions that help more than users worldwide deliver high-quality desktop, web and mobile applications.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Nightvisionnightviz.ai HQ: Remote, United StatesReported employees: 11-50 | Remote, United States | 11-50 | Exact match | 20 contacts → |
“Radically simplifying Web and API Security Testing NightVision brings application security testing into the modern development workflow.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Loadmillloadmill.com HQ: Palo Alto, CA, United StatesReported employees: 11-50 | Palo Alto, CA, United States | 11-50 | Exact match | 17 contacts → |
“Loadmill builds AI agents that test mobile applications like real users.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Apicontextapicontext.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 17 contacts → |
“APIContext provides outside-in application testing that replicates how your users access your apps.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Tracetronic INCtracetronic.com HQ: Troy, MI, United StatesReported employees: 11-50 | Troy, MI, United States | 11-50 | Exact match | 15 contacts → |
“tracetronic inc delivers a modular framework with streamlined solutions for software test automation, execution, orchestration, and analysis for end-to-end software development.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Covlantcovlant.ai HQ: Sacramento, CA, United StatesReported employees: 1-10 | Sacramento, CA, United States | 1-10 | Exact match | 14 contacts → |
“Covlant is transforming how software teams approach quality assurance, making it smarter and more efficient with AI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | PFLBpflb.us HQ: Mountain View, CA, United StatesReported employees: 1-10 | Mountain View, CA, United States | 1-10 | Exact match | 14 contacts → |
“At PFLB, we're dedicated to helping technology teams scale and optimize their applications with our robust performance testing platform and professional engineering services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Skyrampskyramp.dev HQ: Sf Bay, United StatesReported employees: 11-50 | Sf Bay, United States | 11-50 | Exact match | 13 contacts → |
“Skyramp is an AI-driven testing platform that acts like a personal QA engineer for your development team.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | KERNOkerno.io HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 13 contacts → |
“Kerno autonomously writes, runs and maintains integration tests in your IDE covering every corner of your backend codebase so you can ship fast without breaking anything.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | qodex.aiqodex.ai HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 11 contacts → |
“AI creates your API collections and writes Automation tests without any manual efforts.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Early Technologiesstartearly.ai HQ: Wilmington, DE, United StatesReported employees: 11-50 | Wilmington, DE, United States | 11-50 | Exact match | 9 contacts → |
“Early is for engineering, QA, and release leaders at organizations where a production regression is expensive to diagnose and slow to recover from.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 91 company matches
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Api testing tools: dataset insights
September 19, 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
91 records in the displayed employee bands.
0 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 91 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 19, 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 ↗
Questions about this company list
What does Exact match mean for api testing tools?
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 api testing tools did RevenueBase find based in the United States?
The saved snapshot records 91 matching company records, 5,309 tracked contacts and 2,058 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 19, 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.
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Cite this list
RevenueBase Data Team. Top 25 api testing tools based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/api-testing-tools/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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