| Price from | $5/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Self-hosted | — | Yes |
| Plans published | 5 | 1 |
| Spec score · Online whiteboards | 9.2 (#7) | 8.0 (#25) |
| Spec score · Online Whiteboard Tools | 9.0 (#9) | 7.8 (#32) |
| Product | Limnu is an online whiteboard for sketching, sharing, brainstorming, and real-time collaboration. | SAGE3 is an open-source collaborative workspace for people to work together and with AI. |
| Support | Limnu offers email support at [email protected] and a support form. | The maker directs users to its Discord channel for help. |
