head to head · open source
Bruno vs OpenAPI.NET
Bruno has 47,992 GitHub stars, 3,068 forks, 1,831 open issues and last shipped yesterday. OpenAPI.NET has 1,616 stars, 291 forks, 31 open issues and last shipped 6 days ago. Bruno leads on adoption by 2,870% (47,992 vs 1,616 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 | ★ 48K | ★ 1.6K |
| License | MIT | MIT |
| Written in | JavaScript | C# |
| Last push | 2026-11-02 | 2026-10-28 |
| Forks | ⑂ 3.1K | ⑂ 291 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Bruno if
- You weight community size — 48K 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 Opensource IDE for exploring and testing APIs. English Українська Русский Türkçe Deutsch Français Português (BR) 한국어 বাংলা Español Italiano Română Polski 简体中文 正體中文 العربية 日本語 ქართული Nederlands فارسی Bruno is a new and innovative API client, aimed at revolutionizing the status quo represented by Postman and similar tools out there. Bruno stores your collections directly in a folder on your filesystem. We use a plain text markup language, Bru, to save information about API requests. You can use Git or any version control of your choice to collaborate over your API collections. Bruno is offline only. There…
read the full Bruno overview →
About OpenAPI.NET
OpenAPI.NET The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model. See more information on the OpenAPI specification and its history here: OpenAPI Initiative Project Objectives: Provide a single shared object model in .NET for OpenAPI descriptions. Include the most primitive Reader for ingesting OpenAPI JSON and YAML documents in both V2 and V3 formats. Provide OpenAPI description writers for both V2 and V3 specification formats. Enable developers to create Readers that translate different data…
read the full OpenAPI.NET overview →
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Frequently asked questions
Is Bruno or OpenAPI.NET more popular?
Bruno has 47,992 GitHub stars and OpenAPI.NET has 1,616. 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 (47,992 stars) or its MIT licence terms. Choose OpenAPI.NET if its feature set, stack or MIT licence fits better. Both are self-hostable.