oasdiff

oasdiff is ranked #7 of 24 in api design tools on The Geeks Club. It runs on API, Linux, macOS, Self-hosted, Web, Windows. There is a free plan. A free trial is offered. Paid plans start at $100/mo.

oasdiff plans and pricing

All plans

Free Free Free forever CLI diff, breaking changes and changelog · GitHub Action inline PR annotations · side-by-side review · encrypted spec storage · no account required oasdiff.com · 1 Oct 2026

Pro $100/mo $100/month Approval workflow · audit trail · merge gate · up to 5 reviewers across 5 repositories oasdiff.com · 1 Oct 2026

Enterprise Not published Custom Unlimited repositories and reviewers · SLA · dedicated support · optional no-upload GitHub mode oasdiff.com · 1 Oct 2026

Compared on api design tools

Free plan: Yes
AsyncAPI support: No

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oasdiff

Purpose: oasdiff compares OpenAPI specifications, generates changelogs, and detects breaking changes before release.
OpenAPI support: oasdiff supports OpenAPI 3.0, 3.1, and 3.2.
Change coverage: oasdiff detects 755 distinct breaking and non-breaking API changes.
CLI installation: The CLI is available through Homebrew, a shell installer, Docker, and pre-built Linux, macOS, and Windows binaries.
Output formats: CLI output supports text, JSON, YAML, HTML, Markdown, and GitHub Actions annotations.
GitHub integration: The GitHub Action compares pull-request and base-branch specifications and adds inline breaking-change annotations.
AI integrations: oasdiff provides a hosted MCP server that works with Claude, Cursor, and other Streamable HTTP MCP clients.
Browser tool: The web diff tool compares OpenAPI or Swagger specifications without installation or sign-up and exports text, YAML, JSON, Markdown, and HTML.
Encryption: Specs and changelogs are encrypted client-side before upload, and servers retain only ciphertext that oasdiff cannot read.
Review retention: Free review links expire after 7 days, while Pro reviews remain for the life of the pull request.
Enterprise privacy: Enterprise can load specs directly from GitHub at review time using each reviewer's access without uploading or storing specs.
Open source: The oasdiff engine, including its CLI and GitHub Action, is open source under the Apache 2.0 license.
Microservices: Composed mode compares collections of OpenAPI files together for APIs split across multiple services.
Support: oasdiff provides support and security or procurement contact through [email protected].
Price from: $100/mo

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Where it ranks on The Geeks Club

Best API Design Tools in 2026#7 of 24
Best API Governance Software in 2026#5 of 22
Best Contract Testing Tools in 2026#7 of 21

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Sources

oasdiff.com· checked 1 Oct 2026
oasdiff.com/docs/getting-started· checked 1 Oct 2026
oasdiff.com/docs/github-action· checked 1 Oct 2026
oasdiff.com/docs/mcp· checked 1 Oct 2026
oasdiff.com/diff· checked 1 Oct 2026
oasdiff.com/security· checked 1 Oct 2026
oasdiff.com/docs/enterprise· checked 1 Oct 2026
oasdiff.com/docs/microservices· checked 1 Oct 2026
oasdiff.com/pricing· checked 1 Oct 2026