SigmaOS vs Tor Browser
| SigmaOS | Tor Browser | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | Free |
| Open source | No | Yes |
| Platforms | macOS | Android, Linux, macOS, Windows |
| Free plan | Yes | Yes |
| Paid from | $20/mo | — |
| Supported platforms | desktop | both |
| Browser engine | webkit | — |
| Built-in ad blocking | Yes | — |
| Extension support | both | — |
| Cross-device sync | Yes | — |
| Open source | — | Yes |
Both are listed in Best Web Browsers. On Inferse, Tor Browser scores higher on our published basis.