head to head · open source
Zen Browser vs percy
Zen Browser has 45,517 GitHub stars, 1,946 forks, 689 open issues and last shipped yesterday. percy has 2,315 stars, 84 forks, 44 open issues and last shipped 15 days ago. Zen Browser leads on adoption by 1,866% (45,517 vs 2,315 stars). Zen Browser is written in C++ under MPL-2.0; percy is written in Rust under Apache-2.0. Zen Browser has attracted 4% as many forks as stars, percy 4%. 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 | percy | |
|---|---|---|
| GitHub stars | ★ 46K | ★ 2.3K |
| License | MPL-2.0 | Apache-2.0 |
| Written in | C++ | Rust |
| Last push | 2026-11-02 | 2026-10-19 |
| Forks | ⑂ 1.9K | ⑂ 84 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Zen Browser if
- You weight community size — 46K 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 percy if
- You want the percy feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Rust
- You evaluated both and percy fits your workflow better
About Zen Browser
Zen Browser Zen is a firefox based browser with the aim of pushing your productivity to a new level! Download • Website • Documentation • Release Notes Firefox Versions Release Is currently built using Firefox version 155.0.1 ! Twilight Is currently built using Firefox version RC 155.0.1 ! Contributing If you'd like to report a bug, please do so on our GitHub Issues page and for feature requests, you can use GitHub Discussions. Zen is an open source project, and we welcome contributions from the community! Please take a look at the contribution guidelines before getting started! Partners Thanks to all the…
read the full Zen Browser overview →
About percy
Percy ===== Build frontend browser apps with Rust + WebAssembly. Supports server side rendering. The Percy Book This README gives a light introduction to Percy. Check out [The Percy Book] for a full walk through. [The Percy Book]: Stable Rust Percy compiles on stable Rust with one caveat: On nightly Rust you can create text nodes without quotes. On stable Rust, quotation marks are required. This difference will go away once span locations are stabilized in the Rust compiler Rust tracking issue. Getting Started The best way to get up to speed is by checking out The Percy Book, but here is a very basic example to…
read the full percy overview →
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Frequently asked questions
Is Zen Browser or percy more popular?
Zen Browser has 45,517 GitHub stars and percy has 2,315. Zen Browser has the larger community by that measure.
Are Zen Browser and percy free?
Both are open source. Zen Browser is licensed under MPL-2.0 and percy under Apache-2.0. Neither carries a licence fee.
What is the difference between Zen Browser and percy?
Zen Browser is written in C++ and percy in Rust. 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 percy?
Choose Zen Browser if you want the larger community (45,517 stars) or its MPL-2.0 licence terms. Choose percy if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.