DuckDuckGo Browser vs SigmaOS
| DuckDuckGo Browser | SigmaOS | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | No | No |
| Paid from | $8.33/mo | — |
| Open source | No | No |
| Platforms | Android, iOS, macOS, Windows | macOS |
| Free plan | Yes | Yes |
| Paid from | $9.99/mo | $20/mo |
| Supported platforms | both | desktop |
| Built-in ad blocking | Yes | Yes |
| Cross-device sync | Yes | Yes |
| Browser engine | — | webkit |
| Extension support | — | both |
Both are listed in Best Web Browsers. On Samsung Mobile US Press, DuckDuckGo Browser scores higher on our published basis.