Company lists · Data refreshed September 2026
Top 25 Model training platforms based in the United States
RevenueBase identified 330 model training platforms headquartered in the United States as of September 2026 and tracks 42,368 professional contacts across them, including 6,378 with verified work emails and 4,407 with mobile numbers. San Francisco is the largest hub.
This list covers model training platforms 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 5, 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 model training platforms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | APPENStrong evidence | 19,890 | |||
“Appen has been a leader in AI training data for over 25 years, providing high-quality, diverse datasets that power the world's leading AI models.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 6,538 | ||||
“iMerit is a leader in expert data solutions for training, tuning and evaluating AI models and computer vision systems.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 4,886 | ||||
“TELUS Digital AI & Data Solutions partners with a diverse and vibrant community to help our customers enhance their AI and machine learning models.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,510 | ||||
“Dataiku is the Platform for AI Success, the enterprise orchestration layer for building, deploying, and governing AI.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 967 | ||||
“Snorkel AI is the frontier AI data lab, helping teams build the data and environments behind high-performing frontier and agentic AI.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 766 | ||||
“Anyscale enables Python developers to build and run all their AI-from data prep to training and inference-at any scale.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 525 | ||||
“Anaconda, the leader in advancing AI innovation, is the trusted foundation for AI-native development that empowers builders and enterprises to secure, orchestrate, and accelerate…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 441 | ||||
“Labelbox builds and operates reinforcement learning data factories for the world’s leading AI labs and enterprises, powering the next generation of frontier models and AI…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 405 | ||||
“Founded in 2012, H2O.ai is on a mission to democratize AI.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 401 | ||||
“Build Super Accurate AI with us.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 357 | ||||
“Weights & Biases: the AI developer platform.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 304 | ||||
“Together AI is the AI Native Cloud, purpose-built for AI engineers and researchers with a full suite of tooling across inference, model shaping, and pre-training.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 183 | ||||
“The next-generation AI developer platform unifying the development and deployment of AI for the world.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | Telus International AI Data SolutionsPartial evidence | 173 | |||
“TELUS International AI Data Solutions partners with a diverse and vibrant community to help our customers enhance their AI and machine learning models.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 166 | ||||
“Fireworks is the fastest way to build, tune, and scale AI on open models.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 140 | ||||
“The AI development platform - From idea to AI, Lightning fast.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 131 | ||||
“webAI helps enterprises build, deploy, and operate custom AI on infrastructure they own, not in someone else’s cloud.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 131 | ||||
“The connectivity layer for AI.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 110 | ||||
“CYPHER Learning is the AI-native platform built to power modern training operations.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 103 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 95 | ||||
“GMI Cloud’s mission is to empower anyone to deploy and scale AI effortlessly.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 93 | ||||
“The Voltage Park AI Factory: a fully integrated hardware and software platform that eliminates the learning curve, vendor lock-in, and data privacy tradeoffs holding companies…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 93 | ||||
“Flatiron builds AI systems from the ground up.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 89 | ||||
“io.net is the intelligent stack for powering AI.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 85 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 330 model training platforms based in the United States
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Model training platforms based in the United States at a glance
As of Sep 5, 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 model training platforms, 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 “model training platforms”. 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 model training platforms, 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, 6,378 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 5, 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.
Model training platforms by metro
- Model training platforms in San Francisco62
- Model training platforms in New York34
Frequently asked
How many model training platforms are there based in the United States?
RevenueBase identified 330 model training platforms 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?
APPEN, headquartered in Kirkland, tops this list with the largest team on record.
Which city has the most model training platforms?
San Francisco leads with 62 headquartered companies, followed by New York (34) and Palo Alto (17).
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 6,378 verified decision-maker contacts tracked across these 330 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 5, 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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