head to head · open source
Bruno vs NSwag
Bruno has 47,992 GitHub stars, 3,068 forks, 1,831 open issues and last shipped yesterday. NSwag has 7,369 stars, 1,363 forks, 2,057 open issues and last shipped 2 months ago. Bruno leads on adoption by 551% (47,992 vs 7,369 stars). Bruno is written in JavaScript under MIT; NSwag is written in C# under MIT. Bruno has attracted 6% as many forks as stars, NSwag 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 | NSwag | |
|---|---|---|
| GitHub stars | ★ 48K | ★ 7.4K |
| License | MIT | MIT |
| Written in | JavaScript | C# |
| Last push | 2026-11-02 | 2026-09-07 |
| Forks | ⑂ 3.1K | ⑂ 1.4K |
| 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 NSwag if
- You want the NSwag feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and NSwag 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 NSwag
NSwag: The Swagger/OpenAPI toolchain for .NET, ASP.NET Core and TypeScript NSwag NJsonSchema Apimundo Namotion.Reflection :point right: Announcing Apimundo: An API documentation system based on NSwag and NJsonSchema :point left: NSwag is a Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, .NET Core, Web API, ASP.NET Core, TypeScript (jQuery, AngularJS, Angular 2+, Aurelia, KnockoutJS and more) and other platforms, written in C . The OpenAPI/Swagger specification uses JSON and JSON Schema to describe a RESTful web API. The NSwag project provides tools to generate OpenAPI specifications from existing ASP.NET Web API…
read the full NSwag overview →
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Frequently asked questions
Is Bruno or NSwag more popular?
Bruno has 47,992 GitHub stars and NSwag has 7,369. Bruno has the larger community by that measure.
Are Bruno and NSwag free?
Both are open source. Bruno is licensed under MIT and NSwag under MIT. Neither carries a licence fee.
What is the difference between Bruno and NSwag?
Bruno is written in JavaScript and NSwag 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 NSwag?
Choose Bruno if you want the larger community (47,992 stars) or its MIT licence terms. Choose NSwag if its feature set, stack or MIT licence fits better. Both are self-hostable.