head to head · open source
Insomnia vs WebApiClient
Insomnia has 40,022 GitHub stars, 2,366 forks, 874 open issues and last shipped yesterday. WebApiClient has 2,136 stars, 445 forks, 14 open issues and last shipped 2 months ago. Insomnia leads on adoption by 1,774% (40,022 vs 2,136 stars). Insomnia is written in TypeScript under Apache-2.0; WebApiClient is written in C# under MIT. Insomnia has attracted 6% as many forks as stars, WebApiClient 21%. Insomnia was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Insomnia | WebApiClient | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 2.1K |
| License | Apache-2.0 | MIT |
| Written in | TypeScript | C# |
| Last push | 2026-09-18 | 2026-07-17 |
| Forks | ⑂ 2.4K | ⑂ 445 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Insomnia if
- You weight community size — 40K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick WebApiClient if
- You want the WebApiClient feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and WebApiClient fits your workflow better
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 →
About WebApiClient
WebApiClient is an MIT licensed C REST API client library for .NET developers who declare HTTP endpoints as interfaces instead of hand writing HttpClient plumbing.
read the full WebApiClient overview →
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Frequently asked questions
Is Insomnia or WebApiClient more popular?
Insomnia has 40,022 GitHub stars and WebApiClient has 2,136. Insomnia has the larger community by that measure.
Are Insomnia and WebApiClient free?
Both are open source. Insomnia is licensed under Apache-2.0 and WebApiClient under MIT. Neither carries a licence fee.
What is the difference between Insomnia and WebApiClient?
Insomnia is written in TypeScript and WebApiClient in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Insomnia or WebApiClient?
Choose Insomnia if you want the larger community (40,022 stars) or its Apache-2.0 licence terms. Choose WebApiClient if its feature set, stack or MIT licence fits better. Both are self-hostable.