What happened to Optic API diff tool?

Optic was archived January 12 2026. Atlassian acquired it in April 2024 but never integrated it into Compass. The last release was August 2025.

How do I detect breaking changes in OpenAPI specs in CI now that Optic is gone?

oasdiff is the main open-source CLI alternative. SpecShield and APInotes offer paid SaaS replacements. None match Optic's combination of MIT license, clean CLI, CI integration, and rule system.

Is there an open source Optic alternative for OpenAPI breaking change detection?

oasdiff (900 stars) is the closest but lacks Optic's CI dashboard UX. No maintained MIT-licensed drop-in with full Optic feature parity exists as of June 2026.

What is OpenAPI breaking change detection?

Automatically comparing two OpenAPI spec versions to flag changes that would break existing API consumers — removed fields, changed types, stricter validation, removed endpoints.

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Optic archived Jan 2026, no maintained CLI for OpenAPI breaking-change detection in CI

Optic (the open-source default for OpenAPI breaking-change detection, 1.5k stars, YC-backed) was archived January 12 2026 after Atlassian acquisition. No community fork emerged. oasdiff exists but is raw CLI with no CI integration UX. SpecShield and APInotes are paid SaaS. Builders using Optic in CI have no maintained drop-in replacement.

Product Idea from this Signal

A CLI tool that catches OpenAPI breaking changes in CI before they reach production

2.6k ▲

Optic was archived in January 2026 and left thousands of teams without a maintained CLI for catching OpenAPI breaking changes in their CI pipelines. oasdiff provides raw diff output but ships with no PR integration, no policy enforcement, and no migration guidance. Teams are either manually diffing specs, running brittle shell scripts around oasdiff, or migrating to paid SaaS they don't want.

openapiapi-contractsci-cdbreaking-changesdeveloper-toolsgithub-actionsrest-api

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