Company lists · Data refreshed September 2026

Top 25 Machine learning testing platforms worldwide

RevenueBase identified 203 machine learning testing platforms worldwide as of September 2026 and tracks 4,192 professional contacts across them, including 1,007 with verified work emails. The United States is the largest market and San Francisco the largest hub.

This list covers machine learning testing platforms worldwide, 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 28, 2026. Country and city lists for machine learning testing platforms follow the table.

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 28, 2026 86% judged on-target in blind review
203Companies
4,192Contacts tracked
1,007Verified emails
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The 25 largest machine learning testing platforms worldwide

Ranked by team size
Top 25 of 203 machine learning testing platforms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to machine learning testing platforms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceSingapore, CA, United StatesHQ checked Sep 28, 2026201-500770 contacts →

Indirect evidence

“Thoth AI is a global AI data solutions company with R&D operations in Silicon Valley, working with AI teams to support the design, development, and deployment of production-grade…”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceParis, United StatesHQ checked Sep 28, 2026n/a608 contacts →

Indirect evidence

“The AI community building the future.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceMountain View, CA, United StatesHQ checked Sep 28, 202651-200401 contacts →

Indirect evidence

“Build Super Accurate AI with us.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceAuckland, New ZealandHQ checked Sep 28, 2026201-500261 contacts →

Indirect evidence

“Straker is an AI technology company transforming enterprise data into intelligent systems.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceSan Mateo, CA, United StatesHQ checked Sep 28, 202651-200166 contacts →

Indirect evidence

“Fireworks is the fastest way to build, tune, and scale AI on open models.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidenceNew York, NY, United StatesHQ checked Sep 28, 202651-200140 contacts →

Partial evidence

“The AI development platform - From idea to AI, Lightning fast.”

Source: RevenueBase Database · checked Sep 28, 2026
7Partial evidenceWilmington, DE, United StatesHQ checked Sep 28, 202651-200103 contacts →

Partial evidence

“Clarifai is an independent artificial intelligence company providing a full-stack AI platform designed to help teams create, manage, and deploy AI workloads on any compute.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceBurlingame, CA, United StatesHQ checked Sep 28, 202651-20092 contacts →

Indirect evidence

“Galileo Technologies Inc, now part of Cisco, has fully transitioned to be a part of the Cisco brand.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceNew York, NY, United StatesHQ checked Sep 28, 202651-20085 contacts →

Indirect evidence

“Comet has been building AI developer tools since 2017, first for teams training their own models, and later for those building LLM-powered agents.”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceSan Francisco Bay, CA, United StatesHQ checked Sep 28, 202651-20081 contacts →

Indirect evidence

“RagaAI builds AI agents for healthcare and clinical research, taking the manual, repetitive work off teams so they can focus on patients and outcomes.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 202651-20078 contacts →

Indirect evidence

“HumanSignal enables data science teams to build AI models with their company DNA.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceMountain View, United StatesHQ checked Sep 28, 202651-20066 contacts →

Partial evidence

“One platform to build, test, and train anything (still in ~stealth, more to come soon)”

Source: RevenueBase Database · checked Sep 28, 2026
13Strong evidenceLondon, United KingdomHQ checked Sep 28, 202651-20065 contacts →

Strong evidence

“Since 2014, Seldon has been at the forefront of developing global infrastructure that enables enterprises to take control of complexity in machine learning.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 28, 202611-5061 contacts →

Indirect evidence

“At Aligned, we believe that as AI models become more sophisticated, deep subject-matter expertise becomes essential to push the frontier of AI performance and ensure these systems…”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceAustin, NC, United StatesHQ checked Sep 28, 202651-20057 contacts →

Indirect evidence

“In 36 months, agentic AI systems will be an operating reality across major institutions.”

Source: RevenueBase Database · checked Sep 28, 2026
16Partial evidence千代田区, JapanHQ checked Sep 28, 202611-5044 contacts →

Partial evidence

“Empowering Your Potential” Society5.0 AISIGNATE® AISIGNATESIGNATE Competition SIGNATEAISIGNATE Partners TaaSTalent as a Service SIGNATEDXSIGNATE Cloud e-learning DXSaaSSoftware as…”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidenceParis, FranceHQ checked Sep 28, 202611-5039 contacts →

Indirect evidence

“At Craft AI, we are convinced that the future of artificial intelligence lies in the democratisation of MLOps.”

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceCA, United StatesHQ checked Sep 28, 202611-5029 contacts →

Indirect evidence

“End-to-end AI engineering stack We started as a Python validation library.”

Source: RevenueBase Database · checked Sep 28, 2026
19Partial evidenceSan Francisco, United StatesHQ checked Sep 28, 202611-5029 contacts →

Partial evidence

“Essential AI is on a mission to make frontier AI more accessible through an open, collaborative platform.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceSaarbrücken, GermanyHQ checked Sep 28, 202611-5029 contacts →

Indirect evidence

“Unreliable AI doesn’t belong in production.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceUnited StatesHQ checked Sep 28, 202611-5025 contacts →

Indirect evidence

“HPC-AI Tech is a startup focusing on improving the efficiency of enterprise AI model training and deployment.”

Source: RevenueBase Database · checked Sep 28, 2026
22Partial evidenceNoida, IndiaHQ checked Sep 28, 202611-5023 contacts →

Partial evidence

“LLUMO AI is the leading platform for debugging and ensuring the reliability of Agentic AI systems.”

Source: RevenueBase Database · checked Sep 28, 2026
23Strong evidenceUnited StatesHQ checked Sep 28, 202611-5022 contacts →

Strong evidence

“Tensorleap is a deep-learning debugging and explainability platform that helps AI teams deeply understand how their models behave and fix failures before they hit production.”

Source: RevenueBase Database · checked Sep 28, 2026
24Partial evidenceUnited StatesHQ checked Sep 28, 202611-5018 contacts →

Partial evidence

“ReSim is a test orchestration and evaluation platform for physical AI.”

Source: RevenueBase Database · checked Sep 28, 2026
25Indirect evidenceRaleigh, NC, United StatesHQ checked Sep 28, 20261-1018 contacts →

Indirect evidence

“UbiAI accelerates task-specific model training from months to days.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 203 machine learning testing platforms worldwide

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Machine learning testing platforms worldwide at a glance

As of Sep 28, 2026
24.0%Verified-email coverage
20.7Average contacts per company
1-10Median size (employees)
12.3%Largest-city concentration · San Francisco
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
135
11-50
46
51-200
18
201-500
3
501-1,000
1

Email recency is reported on each country list linked below.

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 machine learning testing platforms, 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.
Coverage
Every country. Country and city lists for machine learning testing platforms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “machine learning testing platforms”. 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 machine learning testing platforms), 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 machine learning testing platforms, and records with no verified work email.
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, 1,007 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 28, 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.

Machine learning testing platforms by location

2 lists · largest first

Every Machine learning testing platforms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 machine learning testing platforms, 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 machine learning testing platforms are there worldwide?

RevenueBase identified 203 machine learning testing platforms worldwide 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?

Thoth AI, headquartered in San Mateo, tops this list with the largest team on record.

Which country has the most machine learning testing platforms?

The United States leads with 76 companies. Every machine learning testing platforms list by country and city is linked on this page.

Which city has the most machine learning testing platforms?

San Francisco leads with 25 headquartered companies, followed by Paris (6) and London (5).

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 1,007 verified decision-maker contacts tracked across these 203 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 28, 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.