head to head
Postman vs Insomnia
Insomnia is the open source alternative to Postman — api development and testing platform. Here is the honest comparison.
Yes — Insomnia is a viable free replacement for Postman. Insomnia is open source under Apache-2.0, written in TypeScript, with 40,021 GitHub stars, 2,365 forks and 874 open issues; it was last pushed 13 hours ago. Postman costs from $14, while self-hosting Insomnia carries no licence fee — the trade is your operational time instead of a subscription. 2 other open source Postman alternatives are tracked here, led by Hoppscotch at 80,331 stars. Insomnia ranks #3 of 3 tracked open source Postman alternatives by stars. The tracked set, by adoption: Hoppscotch (80,331 stars), Bruno (47,022 stars). Replacement criteria on this page: 4 reasons to move to Insomnia and 3 reasons to stay on Postman.
choose Insomnia if
- Your Postman bill is growing with seats or usage
- You need your data in a format and server you control
- Your compliance posture requires auditing the code that touches sensitive data
- You have (or can rent) a server and basic Docker comfort
stick with Postman if
- You need the polished onboarding and support SLAs of a commercial vendor
- Your team has zero capacity to operate software, even self-hosted-simple
- You depend on a Postman integration ecosystem that the OSS alternatives have not replicated
Side by side
| Insomnia (open source) | Postman | |
|---|---|---|
| Price | Free (self-hosted) | $14-$49/user/month |
| License | Apache-2.0 | Proprietary |
| Source code | Public, auditable | Closed |
| Self-hosting | Yes — Kong/insomnia | Cloud only |
| Data ownership | Your server, your format | Vendor's cloud |
| Community | ★ 40K · ⑂ 2.4K | — |
| Built with | TypeScript | — |
Why people look for a Postman alternative
About Insomnia
Insomnia is an open source, cross platform API client built with Electron and TypeScript for developing and testing APIs across multiple protocols including REST, GraphQL, WebSockets, SSE, and gRPC. It runs on macOS, Windows, and Linux and is distributed under the Apache 2.0 license. The project serves as a direct open source alternative to Postman, offering similar core functionality without vendor lock in or mandatory cloud usage.
read the full Insomnia overview →
Other open source alternatives to Postman
last updated nightly · ranking method: github stars, live-tracked
Frequently asked questions
Is Insomnia a good replacement for Postman?
Insomnia is an open source alternative to Postman (API development and testing platform). It is written in TypeScript and licensed under Apache-2.0, with 40,021 GitHub stars.
Is Insomnia free compared to Postman?
Yes. Insomnia is open source — there is no licence fee, and you can self-host it. Postman is typically a paid subscription, so the trade-off is licence cost against the operational work of running it yourself.
How do I migrate from Postman to Insomnia?
Migration effort depends on the data formats involved. Check Insomnia's documentation for import options, and compare the feature table above to confirm the capabilities you depend on are covered before switching.