Speakeasy is a developer-tools company focused on the API integration layer — the SDKs, documentation, and tooling that determine how easily developers can adopt a company's API. Building and maintaining high-quality client libraries across many programming languages is expensive and error-prone, and hand-written SDKs drift out of sync with the API as it evolves. Speakeasy automates this by treating the OpenAPI specification as the single source of truth and generating idiomatic, production-ready SDKs, documentation, and tests from it.
The platform produces client libraries that feel hand-crafted in each target language, complete with type safety, retries, pagination, and authentication handled correctly — rather than the thin, generic output of older code generators. Because everything derives from the spec, regenerating keeps SDKs, docs, and the API itself consistent as changes ship. Speakeasy also supports modern needs such as generating MCP servers, letting AI agents interact with an API through the Model Context Protocol.
This matters because the SDK and docs are often the first thing a developer touches when evaluating an API product; a clunky integration experience costs adoption. Speakeasy's customer base reflects this, spanning API-first companies that treat developer experience as a competitive advantage. By eliminating the maintenance burden of multi-language SDKs, Speakeasy lets small platform teams ship a polished, enterprise-grade integration surface.
Speakeasy raised a $15M Series A led by FPV Ventures, with participation from GV (Google Ventures) and Quiet Capital, plus angel investors from companies like Prisma and Cribl. The funding accelerates its roadmap as APIs become not only the connective tissue between software but increasingly the interface through which AI agents act on the world.