Stainless (Acquired by Anthropic)

Stainless helps you deliver world-class developer interfaces for your API. Generate robust and idiomatic SDKs in popular programming languages, token-efficient MCP servers, and SDK-native documentations that evolve with your OpenAPI spec.

AI coding and devtoolsDeveloper tools and cloud

Stainless (Acquired by Anthropic) raised $25M in a Series A round announced December 10, 2024, according to fundraiseinsider.com. Investors in that round: Andreessen Horowitz.

Raise history

1. September 29, 2026
   First seen by Recent Funding
   via startups.gallery
2. December 10, 2024
   Series A · $25M
   AAndreessen Horowitz (lead)
   Source: fundraiseinsider.com (startups.gallery listing)

Investors

• Aa16z
• AAndreessen Horowitz
• FFelicis
• SSequoia
• TThe General Partnership

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Every amount links to the page it came from. How Recent Funding sources and verifies funding data. The same data as JSON: /api/v1/companies/stainless-acquired-by-anthropic.