head to head · open source
Bruno vs karate
Bruno has 47,992 GitHub stars, 3,068 forks, 1,831 open issues and last shipped yesterday. karate has 9,002 stars, 2,048 forks, 18 open issues and last shipped yesterday. Bruno leads on adoption by 433% (47,992 vs 9,002 stars). Bruno is written in JavaScript under MIT; karate is written in Java under MIT. Bruno has attracted 6% as many forks as stars, karate 23%. Bruno was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (api-testing, automation, developer-tools), 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 | karate | |
|---|---|---|
| GitHub stars | ★ 48K | ★ 9.0K |
| License | MIT | MIT |
| Written in | JavaScript | Java |
| Last push | 2026-11-02 | 2026-11-02 |
| Forks | ⑂ 3.1K | ⑂ 2.0K |
| 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 karate if
- You want the karate feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Java
- You evaluated both and karate 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 karate
Karate The open source tool that combines API testing, mocks, performance testing, and UI automation into a single, unified framework. 📖 Documentation: docs.karatelabs.io Looking for the old README? The previous README monolith is preserved at: github.com/karatelabs/karate/tree/v1.5.2.RC2 Anchor links (e.g. syntax guide , configuration ) can be appended to navigate directly to specific sections. Karate v2 development notes See README V2.md for v2 module descriptions, feature highlights, and migration notes.
read the full karate overview →
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Frequently asked questions
Is Bruno or karate more popular?
Bruno has 47,992 GitHub stars and karate has 9,002. Bruno has the larger community by that measure.
Are Bruno and karate free?
Both are open source. Bruno is licensed under MIT and karate under MIT. Neither carries a licence fee.
What is the difference between Bruno and karate?
Bruno is written in JavaScript and karate in Java. 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 karate?
Choose Bruno if you want the larger community (47,992 stars) or its MIT licence terms. Choose karate if its feature set, stack or MIT licence fits better. Both are self-hostable.