head to head · open source
Bruno vs arex-agent-java
Bruno has 47,992 GitHub stars, 3,068 forks, 1,831 open issues and last shipped yesterday. arex-agent-java has 572 stars, 143 forks, 74 open issues and last shipped 2 months ago. Bruno leads on adoption by 8,290% (47,992 vs 572 stars). Bruno is written in JavaScript under MIT; arex-agent-java is written in Java under Apache-2.0. Bruno has attracted 6% as many forks as stars, arex-agent-java 25%. Bruno was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (api-testing), 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 | arex-agent-java | |
|---|---|---|
| GitHub stars | ★ 48K | ★ 572 |
| License | MIT | Apache-2.0 |
| Written in | JavaScript | Java |
| Last push | 2026-11-02 | 2026-09-02 |
| Forks | ⑂ 3.1K | ⑂ 143 |
| 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 arex-agent-java if
- You want the arex-agent-java feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and arex-agent-java 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 arex-agent-java
AREX An Open Source Testing Framework with Real World Data Introduction Building Getting Started Contributing License Introduction As your application evolves more complex, the effort required to thoroughly test against it also becomes tremendous. Arex is a framework designed around a quite straightforward principle of leveraging your real world data(i.e. database record, service payload, cache items etc.) for regression testing. Simple is powerful. The idea behind makes it incredibly powerful. AREX provides an out of box agent file that could be attached to any applications with Java 8+ and dynamically weaves…
read the full arex-agent-java overview →
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Frequently asked questions
Is Bruno or arex-agent-java more popular?
Bruno has 47,992 GitHub stars and arex-agent-java has 572. Bruno has the larger community by that measure.
Are Bruno and arex-agent-java free?
Both are open source. Bruno is licensed under MIT and arex-agent-java under Apache-2.0. Neither carries a licence fee.
What is the difference between Bruno and arex-agent-java?
Bruno is written in JavaScript and arex-agent-java 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 arex-agent-java?
Choose Bruno if you want the larger community (47,992 stars) or its MIT licence terms. Choose arex-agent-java if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.