head to head · open source
Bruno vs karate
Bruno has 47,022 GitHub stars, 2,888 forks, 1,831 open issues and last shipped yesterday. karate has 8,957 stars, 2,044 forks, 18 open issues and last shipped yesterday. Bruno leads on adoption by 425% (47,022 vs 8,957 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 | ★ 47K | ★ 9.0K |
| License | MIT | MIT |
| Written in | JavaScript | Java |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 2.9K | ⑂ 2.0K |
| 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 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 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 karate
Karate is an open source, MIT licensed Java framework that combines API testing, mocks, performance testing and UI automation into a single unified tool, aimed at teams that need to test APIs and services without stitching several separate tools together.
read the full karate overview →
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Frequently asked questions
Is Bruno or karate more popular?
Bruno has 47,022 GitHub stars and karate has 8,957. 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 (47,022 stars) or its MIT licence terms. Choose karate if its feature set, stack or MIT licence fits better. Both are self-hostable.