
API and AI tool developer platform
speakeasyapi.dev (opens in a new tab)Speakeasy began in developer tooling, building a toolchain for API developer experience, and has since expanded into helping teams build, secure, observe and distribute AI tools across an organisation through its AI Control Plane. That expansion followed the launch of MCP, which turned internal APIs into things agents can call and created a governance problem nobody previously had. Customers today include Mistral AI, Vercel, PlanetScale, Verizon and Docusign. Founded in 2021, the company has hit significant revenue milestones with a team split between San Francisco and London.