Company lists · Data refreshed August 2026
Top 12 AI model fine-tuning platforms based in San Francisco, United States
There are 32 AI model fine-tuning platforms headquartered in San Francisco, United States (RevenueBase, August 2026). RevenueBase tracks 1,873 professional contacts across them, including 614 with verified work emails and 527 with mobile numbers. San Francisco is the largest hub.
This list covers AI model fine-tuning platforms headquartered in San Francisco, 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 August 30, 2026.
The 12 largest AI model fine-tuning platforms based in San Francisco, United States
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 | “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 Aug 30, 2026Thanks. The Data Team will review it. | 141 |
| 2 | “Weights & Biases: the AI developer platform.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 76 |
| 3 | “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 Aug 30, 2026Thanks. The Data Team will review it. | 192 |
| 4 | “Merge is the connective infrastructure for production AI.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 83 |
| 5 | “Runpod is the AI Developer Cloud for teams building, training, and scaling AI applications.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 43 |
| 6 | “HumanSignal enables data science teams to build AI models with their company DNA.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 33 |
| 7 | “Prime Intellect makes frontier AI training accessible to every company.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 17 |
| 8 | “Runloop provides the infrastructure platform for developers building the future of software engineering.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 11 |
| 9 | “Langfuse is an open source AI engineering platform.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 12 |
| 10 | “Network3 is a revolutionary technology that builds a dedicated AI Layer2.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 1 |
| 11 | “Okareo offers the most comprehensive LLM evaluation and fine-tuning platform to ensure AI application developers can deliver high-quality LLM-powered applications fast.” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 4 |
| 12 | “At PropulsionAI, we’re on a mission to redefine the AI model training landscape by providing AI developers with an advanced platform that's not just powerful but also…” Source: company website · checked Aug 30, 2026Thanks. The Data Team will review it. | 1 |
Showing 12 of 32 AI model fine-tuning platforms based in San Francisco, United States
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AI model fine-tuning platforms based in San Francisco, United States at a glance
As of Aug 30, 2026Companies by employee count
AI model fine-tuning platforms by metro in the United States
| Metro | Companies |
|---|---|
| AI model fine-tuning platforms in San Francisco | 32 |
| AI model fine-tuning platforms in Austin | 7 |
| AI model fine-tuning platforms in Palo Alto | 5 |
| AI model fine-tuning platforms in New York | 4 |
| AI model fine-tuning platforms in Chicago | 3 |
| AI model fine-tuning platforms in San Mateo | 3 |
| AI model fine-tuning platforms in Wilmington | 3 |
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 AI model fine-tuning 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: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
- What qualifies
- Companies headquartered in San Francisco, United States whose own description of what they do matches “AI model fine-tuning 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 AI model fine-tuning platforms, and records with no verified work email. Companies headquartered outside San Francisco 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.
- 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, 614 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 August 30, 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
How many AI model fine-tuning platforms are there based in San Francisco, United States?
There are 32 AI model fine-tuning platforms headquartered in San Francisco, United States as of August 2026 (RevenueBase).
What is the largest company on this list?
Anyscale, headquartered in San Francisco, tops this list with the largest team on record.
Which city has the most AI model fine-tuning platforms?
San Francisco leads with 32 headquartered companies, followed by Austin (7) and Palo Alto (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 614 verified decision-maker contacts tracked across these 32 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 2026.
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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.
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