These alternatives were identified from Postman’s pricing changes as recommended replacements.
Free OSS
Free OSS (MIT). Git-based offline API client — REST, GraphQL, collections stored as files in your repo.
API Development
Read and confirmed 2026-10-30
Free
Open-source API client for designing and testing REST, GraphQL, gRPC, WebSocket, and SSE APIs. Local-first with Git sync and optional cloud storage.
API Development
Read and confirmed 2026-11-10
Free
Thunder Client is a lightweight REST API client. The Free plan is $0 per user/month, no credit card required.
API Development
Read 2026-11-03 · catalogue date 2026-08-28
Free OSS
Free OSS (MIT). API development ecosystem — REST, GraphQL, WebSocket, SSE, Socket.IO, MQTT testing.
API Development
Read 2026-10-25 · catalogue date 2026-07-29
−1 stale_verification Our last read of the vendor's pricing page, on 2026-10-25, could read no amount, tier or rate on the page. This is our confidence in the record, not a change by the vendor.
Free
API design, debugging, testing, and documentation platform — free tier: up to 4 users, unlimited projects, unlimited APIs, unlimited requests. API mocking included.
API Development
Read 2026-10-29 · catalogue date 2026-07-31
−1 stale_verification Our last read of the vendor's pricing page, on 2026-10-29, found the page different from the terms we hold. This is our confidence in the record, not a change by the vendor.