Speakeasy
AI SDK generation platform that creates type-safe client libraries in TypeScript, Python, Go, Java, and Ruby from any OpenAPI specification automatically.
Speakeasy is a developer platform that generates production-quality, type-safe SDKs in multiple programming languages directly from an OpenAPI specification, eliminating the manual effort of maintaining hand-written client libraries across languages. APIs that previously required separate developer teams to build and maintain clients in TypeScript, Python, Go, Java, Ruby, C#, and Swift can instead publish Speakeasy-generated SDKs that update automatically when the API spec changes. The generated SDKs include pagination handling, retry logic, authentication, error types, and inline documentation that match the quality of hand-written libraries. Companies including Cohere, ReadMe, and Mistral use Speakeasy to ship and maintain developer SDKs without dedicated SDK engineering headcount. Founded in 2022, Speakeasy operates on a freemium model with paid team plans.
Key Features
- OpenAPI to SDK generation in TypeScript, Python, Go, Java, Ruby, C#, and Swift from a single spec file with no manual code writing
- Production-quality output with pagination handling, retry logic with exponential backoff, auth flows, and strongly typed error classes built in
- GitHub Actions integration that regenerates and publishes updated SDKs automatically whenever the OpenAPI spec changes in CI/CD
- SDK documentation generation that produces usage examples and method reference docs matching the generated library structure exactly
- Terraform provider generation for APIs that need infrastructure-as-code integration alongside language SDK delivery
- Custom SDK branding with namespace, package name, and code style conventions that match the API provider's existing developer experience
Use Cases
- API companies shipping client libraries across 5+ languages without dedicated SDK engineering teams maintaining each language by hand
- Developer tools startups who want to offer a polished TypeScript and Python SDK on launch day without spending months writing them
- Platform engineering teams maintaining internal APIs used across multiple language stacks who need consistent client interfaces across all consumers
- AI model providers who need to ship SDKs as fast as they ship new model capabilities without SDK maintenance becoming a bottleneck
Pros
- Generated SDKs match the quality of hand-written libraries - including pagination, retries, and auth - not just thin wrapper stubs
- Automatic regeneration on spec change means SDK consumers always have up-to-date types without anyone manually tracking API updates
- Multi-language output from a single workflow eliminates the 3-6 month engineering effort of building and maintaining per-language SDK teams
Cons
- Free tier covers only a single SDK target language - teams needing SDKs in 3+ languages require a paid plan immediately
- Generated SDK code is idiomatic but occasionally requires customization for edge cases that fall outside what OpenAPI specs can express clearly
- Paid plans starting at $250/month are justified for teams with active API products but hard to justify for internal-only or experimental APIs
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