Tor Browser vs Vivaldi Comparison
| Feature | ||
|---|---|---|
| Overview | ||
| Rating | 8.3 | 5.9 |
| Established | 2008 | 2016 |
| Platforms |  Windows macOS Linux Android | WindowsmacOSLinuxAndroidiOS |
| Privacy | ||
| Source code | Fully open source | Partly open source |
| Telemetry | No telemetry | Always on |
| Anti-fingerprinting | Aggressive | Basic |
| Ad/tracker block built-in | No | Yes |
| End-to-end encrypted sync | No | Yes |
| Independent security audit | Cure53 2023Show audit detailsHide audit details72-day penetration test and code audit of Tor Browser and the censorship-circumvention tools around it (bridge connection methods, OONI Probe, rdsys, BridgeDB, Conjure); two high-severity issues, both in bridge-distribution backends rather than the browser, fixed afterwards | None on record |
| Technical | ||
| Engine | Firefox ESR | Chromium |
| Default search | DuckDuckGo | Varies by locale (Bing on mobile) |
| Built-in VPN/proxy | Not specified | Yes |
