Mercer | Mettl vs OpenLock
| Mercer | Mettl | OpenLock | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Web | Linux |
| Free plan | — | Yes |
| Supported platforms | — | Linux |
| Blocks app switching | — | Yes |
| Blocks copy and printing | — | Yes |
| Blocks screen capture | — | Yes |
Both are listed in Best Lockdown Browser Software. On Samsung Mobile US Press, OpenLock scores higher on our published basis.