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