head to head · open source
Insomnia vs WireMock.Net
Insomnia has 40,021 GitHub stars, 2,365 forks, 874 open issues and last shipped yesterday. WireMock.Net has 1,680 stars, 240 forks, 21 open issues and last shipped 8 days ago. Insomnia leads on adoption by 2,282% (40,021 vs 1,680 stars). Insomnia is written in TypeScript under Apache-2.0; WireMock.Net is written in C# under Apache-2.0. Insomnia has attracted 6% as many forks as stars, WireMock.Net 14%. 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 | WireMock.Net | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 1.7K |
| License | Apache-2.0 | Apache-2.0 |
| Written in | TypeScript | C# |
| Last push | 2026-09-17 | 2026-09-10 |
| Forks | ⑂ 2.4K | ⑂ 240 |
| 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 WireMock.Net if
- You want the WireMock.Net feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches C#
- You evaluated both and WireMock.Net 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 WireMock.Net
WireMock.Net is an open source C .NET library and mock server for stubbing and mocking web HTTP responses. It lives in the .NET ecosystem and is a developer tool for API development and testing. The project is based on mock4net and mimics functionality from the original Java based WireMock, while providing extended and different functionality. Documentation is available at wiremock.org/dotnet.
read the full WireMock.Net overview →
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Frequently asked questions
Is Insomnia or WireMock.Net more popular?
Insomnia has 40,021 GitHub stars and WireMock.Net has 1,680. Insomnia has the larger community by that measure.
Are Insomnia and WireMock.Net free?
Both are open source. Insomnia is licensed under Apache-2.0 and WireMock.Net under Apache-2.0. Neither carries a licence fee.
What is the difference between Insomnia and WireMock.Net?
Insomnia is written in TypeScript and WireMock.Net 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 WireMock.Net?
Choose Insomnia if you want the larger community (40,021 stars) or its Apache-2.0 licence terms. Choose WireMock.Net if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.