head to head · open source
Bruno vs OpenAPI.NET
Bruno has 47,046 GitHub stars, 2,894 forks, 1,831 open issues and last shipped yesterday. OpenAPI.NET has 1,610 stars, 286 forks, 31 open issues and last shipped 2 days ago. Bruno leads on adoption by 2,822% (47,046 vs 1,610 stars). Bruno is written in JavaScript under MIT; OpenAPI.NET is written in C# under MIT. Bruno has attracted 6% as many forks as stars, OpenAPI.NET 18%. Bruno was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (openapi), so they are genuine substitutes rather than adjacent tools.
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
| Bruno | OpenAPI.NET | |
|---|---|---|
| GitHub stars | ★ 47K | ★ 1.6K |
| License | MIT | MIT |
| Written in | JavaScript | C# |
| Last push | 2026-09-18 | 2026-09-17 |
| Forks | ⑂ 2.9K | ⑂ 286 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Bruno if
- You weight community size — 47K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick OpenAPI.NET if
- You want the OpenAPI.NET feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and OpenAPI.NET fits your workflow better
About Bruno
Bruno is a lightweight, open source API client and IDE for exploring and testing APIs, built for developers and teams who want their request collections stored as plain text in a folder on their own filesystem rather than in a vendor's cloud.
read the full Bruno overview →
About OpenAPI.NET
OpenAPI.NET is the Microsoft maintained .NET SDK that provides a shared object model for OpenAPI descriptions, together with readers and writers that convert OpenAPI JSON and YAML documents into and out of that model, and it is aimed at C and .NET developers who build, validate, or transform OpenAPI documents in code.
read the full OpenAPI.NET overview →
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Frequently asked questions
Is Bruno or OpenAPI.NET more popular?
Bruno has 47,046 GitHub stars and OpenAPI.NET has 1,610. Bruno has the larger community by that measure.
Are Bruno and OpenAPI.NET free?
Both are open source. Bruno is licensed under MIT and OpenAPI.NET under MIT. Neither carries a licence fee.
What is the difference between Bruno and OpenAPI.NET?
Bruno is written in JavaScript and OpenAPI.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, Bruno or OpenAPI.NET?
Choose Bruno if you want the larger community (47,046 stars) or its MIT licence terms. Choose OpenAPI.NET if its feature set, stack or MIT licence fits better. Both are self-hostable.