| Price from | $5/mo | Free |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 5 | 3 |
| Spec score · Online whiteboards | 9.2 (#7) | 8.0 (#24) |
| Spec score · Online Whiteboard Tools | 9.0 (#9) | 7.6 (#42) |
| Founded | Limnu says it was founded in 2015 by two former film-studio employees. | 2022 |
| Headquarters | San Mateo, California, United States | London, United Kingdom |
| Integrations | A Slack integration can create a shared Limnu board from a Slack slash command. | The SDK can use other real-time data backends; the docs name Liveblocks as one example. |
| Product | Limnu is an online whiteboard for sketching, sharing, brainstorming, and real-time collaboration. | tldraw is a React SDK for building infinite-canvas apps such as whiteboards, diagrams, and canvas tools. |
| Self-hosting | Official API material says Limnu hosts user sessions, uploaded files and other whiteboard operations, with no self-hosting option described. | For production, tldraw sync can be hosted on Cloudflare or integrated into a JavaScript backend that supports WebSockets. |
| Support | Limnu offers email support at [email protected] and a support form. | The pricing page says support is available, and the company directs developers to its Discord community for help. |
