These tools competes with

FernvsSpeakeasy

OpenAPI in, idiomatic SDKs and API docs out versus OpenAPI → idiomatic SDKs, MCP servers, and contract tests

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Choose Fern when…

  • •You want type-safe SDKs and docs from your API spec
  • •You need SDKs in TypeScript, Python, Go, and more
  • •You want a Stripe-quality SDK without the manual work

Choose Speakeasy when…

  • •You want auto-generated SDKs from your OpenAPI spec
  • •You're publishing a developer-facing API with multiple SDKs
  • •SDK quality and type safety across languages matter

Side-by-side comparison

Field
Fern
Speakeasy
Category
Specifications
Specifications
Type
Open Source
Commercial
Free Tier
✓ Yes
✓ Yes
Pricing Plans
Managed: Custom
Growth: $250/mo
GitHub Stars
⭐ 3,000
—
Health
●75 — Active
●65 — Slowing

Fern

Takes an OpenAPI spec and generates hand-crafted-quality SDKs across TypeScript, Python, Go, Java, Ruby, C#, and PHP, plus integrated documentation sites. SDKs and docs stay in sync from a single source of truth. Used by Cohere, ElevenLabs, and Merge.

Website ↗GitHub ↗

Speakeasy

Takes an OpenAPI spec and generates polished, type-safe client SDKs across multiple languages, Terraform providers, and MCP servers for AI agent integration. Handles pagination, retries, webhooks, and streaming out of the box. Increasingly positioning itself as the API platform for the agent era.

Website ↗GitHub ↗

Shared Connections5 tools both integrate with

StainlessOpenAPI GeneratorSwagger / OpenAPIRedoclyStoplight

Only Fern (2)

MintlifySpeakeasy

Only Speakeasy (3)

FernMCP SDK (TypeScript)MCP SDK (Python)

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