head to head · open source
Zen Browser vs Browser Operator
Zen Browser has 44,481 GitHub stars, 1,754 forks, 689 open issues and last shipped yesterday. Browser Operator has 508 stars, 83 forks, 15 open issues and last shipped 6 months ago. Zen Browser leads on adoption by 8,656% (44,481 vs 508 stars). Zen Browser is written in C++ under MPL-2.0; Browser Operator is written in TypeScript under BSD-3-Clause. Zen Browser has attracted 4% as many forks as stars, Browser Operator 16%. Zen Browser was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| Zen Browser | Browser Operator | |
|---|---|---|
| GitHub stars | ★ 44K | ★ 508 |
| License | MPL-2.0 | BSD-3-Clause |
| Written in | C++ | TypeScript |
| Last push | 2026-09-17 | 2026-03-19 |
| Forks | ⑂ 1.8K | ⑂ 83 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Zen Browser if
- You weight community size — 44K stars and counting
- You want the MPL-2.0 license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick Browser Operator if
- You want the Browser Operator feature set and don't need the biggest community
- You prefer the BSD-3-Clause license terms
- Your stack matches TypeScript
- You evaluated both and Browser Operator fits your workflow better
About Zen Browser
Zen Browser is a privacy focused, open source web browser built on Firefox’s Gecko engine. It inherits Firefox’s compatibility and extension ecosystem while introducing a streamlined interface and productivity oriented features. The project lives in the desktop browser ecosystem, targeting users who want a Firefox based experience with reduced clutter and enhanced customization.
read the full Zen Browser overview →
About Browser Operator
Browser Operator is an open source, privacy focused AI browser with a built in multi agent platform, aimed at anyone who wants to run research, analysis and web automation locally on macOS or Windows rather than inside a hosted AI browser.
read the full Browser Operator overview →
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Frequently asked questions
Is Zen Browser or Browser Operator more popular?
Zen Browser has 44,481 GitHub stars and Browser Operator has 508. Zen Browser has the larger community by that measure.
Are Zen Browser and Browser Operator free?
Both are open source. Zen Browser is licensed under MPL-2.0 and Browser Operator under BSD-3-Clause. Neither carries a licence fee.
What is the difference between Zen Browser and Browser Operator?
Zen Browser is written in C++ and Browser Operator in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Zen Browser or Browser Operator?
Choose Zen Browser if you want the larger community (44,481 stars) or its MPL-2.0 licence terms. Choose Browser Operator if its feature set, stack or BSD-3-Clause licence fits better. Both are self-hostable.