Helium Browser vs SeaMonkey Mail
| Helium Browser | SeaMonkey Mail | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | Free | — |
| Open source | Yes | No |
| Platforms | Windows, macOS, Linux | Windows, macOS, Linux |
| Free plan | Yes | Yes |
| Supported platforms | both | both |
| Browser engine | chromium | gecko |
| Built-in ad blocking | Yes | — |
| Extension support | chrome_store | own_store |
| Cross-device sync | No | — |
| Open source | Yes | Yes |
Both are listed in Best Web Browsers. On Freedom251, Helium Browser scores higher on our published basis.