Waterfox vs Zen Browser
| Waterfox | Zen Browser | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | $5/mo | — |
| Open source | Yes | Yes |
| Platforms | Android, extension, Linux, macOS, Windows | Windows, macOS, Linux |
| Free plan | Yes | Yes |
| Supported platforms | both | desktop |
| Browser engine | gecko | — |
| Built-in ad blocking | Yes | — |
| Tracking protection | advanced | standard |
| Cross-device sync | Yes | Yes |
| Open source | Yes | Yes |
Both are listed in Best Web Browsers. On Freedom251, Waterfox scores higher on our published basis.