Bespoke Labs
Data curation for frontier AI
About Bespoke Labs
Bespoke Labs is an applied AI research company building infrastructure that helps enterprises and frontier AI labs create more reliable AI agents.
Its platform focuses on reinforcement learning environments, automated data curation, prompt optimization, and evaluation systems that improve how large language models perform in real-world production workflows. The company serves Fortune 500 organizations as well as leading AI research teams working on next-generation agentic systems.
The company has developed several widely adopted open research projects, including OpenThoughts, one of the leading open reasoning datasets with more than 10,000 monthly downloads on Hugging Face, Terminal-Bench, an environment-based benchmark cited by Anthropic, OpenAI, and Google DeepMind, and GEPA, a prompt optimization algorithm used by 200+ research teams in production.
Founders
Funding History
Frequently Asked Questions
What does Bespoke Labs do?
Bespoke Labs builds AI infrastructure that helps companies generate, curate and evaluate high-quality post-training datasets for large language models and AI agents.
Who founded Bespoke Labs?
Bespoke Labs was founded in 2024 by Mahesh (Maheswaran) Sathiamoorthy, former Google DeepMind engineer, and Alex Dimakis, Professor at UC Berkeley and Chief Scientist at the company.
When was Bespoke Labs founded?
Bespoke Labs was founded in 2024 and is headquartered in San Francisco, California, United States.
How much funding has Bespoke Labs raised?
As of July 2026, Bespoke Labs has raised a total of $40 million across a Seed round and a Series A round.
What is Bespoke Labs' valuation?
Bespoke Labs has not publicly disclosed its valuation following either its Seed or Series A financing.
Who invested in Bespoke Labs?
Its investors include Wing VC, 8VC, Mayfield, The House Fund, HubSpot Ventures, Character, Extension Fund, Banter Capital, MVP Ventures, Charge Ventures, Ritual Capital, Ambush Capital, Tristan Handy, Jeff Dean, Spiros Xanthos, Dheeraj Pandey and several angel investors from Anthropic, OpenAI and Meta.
