Best AI Diagram Generators in 2026
Updated
32ranked
3free plans on this page
$4.17/molowest paid tier
11 Oct 2026last checked
3 of 3 with known pricing have a free tier;0 apps show full bars: free, open, on most devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 26 | yUMLWeb · Self-hosted · API | Two bars | 1 of 6 | $4.17/mo | 6.4 | ||
| 27 | AutoUMLWeb | Two bars | 1 of 6 | Free | 6.3 | ||
| 28 | diagram.chWeb | Two bars | 1 of 6 | Free | 6.3 | ||
| 29 | FlowChartAIWeb | One bar | 1 of 6 | 5.5 | |||
| 30 | FlowCraftWeb · Extension | One bar | 1 of 6 | $7.99/mo | 5.4 | ||
| 31 | SciDrawWeb | One bar | 1 of 6 | $20/mo | 5.4 | ||
| 32 | ArchiWeb | One bar | 1 of 6 | 5.3 |
Compare all 7 in a table
| # | App | Score | From | Free plan | Paid from | AI diagram limit | Mermaid support |
|---|---|---|---|---|---|---|---|
| 26 | yUML | 6.4 | $4.17/mo | Yes | 5 /user/mo | Yes | |
| 27 | AutoUML | 6.3 | Free | Yes | |||
| 28 | diagram.ch | 6.3 | Free | Yes | Yes | ||
| 29 | FlowChartAI | 5.5 | Yes | ||||
| 30 | FlowCraft | 5.4 | $7.99/mo | Yes | Yes | ||
| 31 | SciDraw | 5.4 | $20/mo | No | 60 /mo | ||
| 32 | Archi | 5.3 | Yes |