Best OnUML Alternatives in 2026
Updated
20 platforms from AI diagram generators ranked against OnUML on the same published basis.
- 1OnUML vs ArchitectureDiagram.ai
- 2OnUML vs Archway
- 3OnUML vs Creately
- 4OnUML vs Eraser
- 5OnUML vs OpenCharts
- 6OnUML vs AI Diagram Maker
- 7OnUML vs Diagrams.so
- 8OnUML vs flow-chart.io
- 9OnUML vs LetDraw
- 10OnUML vs Mermaid Chart
- 11OnUML vs yUML
- 12OnUML vs Nimbalyst
- 13OnUML vs sysdraw
- 14OnUML vs AI Flowchart
- 15OnUML vs InfraSketch
- 16OnUML vs Lucid Train
- 17OnUML vs OpenFlowKit
- 18OnUML vs Splotch
- 19OnUML vs AutoUML
- 20OnUML vs diagram.ch
OnUML alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | ArchitectureDiagram.ai | 7.4 | Free plan | $4.99/mo | API, Web |
| 2 | Archway | 7.4 | Free plan | $12/mo | API, self-hosted, Web |
| 3 | Creately | 7.4 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 4 | Eraser | 7.4 | Free plan | $15/mo | API, Browser, self-hosted, Web |
| 5 | OpenCharts | 7.4 | Free plan | $9.99/mo | API, Mac, Web, Windows |
| 6 | AI Diagram Maker | 7.3 | Free plan | $10/mo | API, Web |
| 7 | Diagrams.so | 7.3 | Free plan | $0.83/mo | API, Web |
| 8 | flow-chart.io | 7.3 | Free plan | $19/mo | API, Web |
| 9 | LetDraw | 7.3 | Free plan | $5/mo | API, self-hosted, Web |
| 10 | Mermaid Chart | 7.3 | Free plan | $12/mo | API, Browser, Web |
| 11 | yUML | 7.3 | Free plan | $4.17/mo | API, self-hosted, Web |
| 12 | Nimbalyst | 6.0 | Free plan | $16.67/mo | iOS, Linux, Mac, Windows |
| 13 | sysdraw | 6.0 | Free plan | $6/mo | Web |
| 14 | AI Flowchart | 5.9 | Free plan | $9/mo | Web |
| 15 | InfraSketch | 5.9 | Free plan | Free | Linux, Mac, Web, Windows |
| 16 | Lucid Train | 5.9 | Free plan | $2.50/mo | Linux, Mac, Windows |
| 17 | OpenFlowKit | 5.9 | Free plan | Free | Web |
| 18 | Splotch | 5.9 | Free plan | $0.92/mo | Browser, Web |
| 19 | AutoUML | 5.8 | Free plan | Free | Web |
| 20 | diagram.ch | 5.8 | Free plan | Free | Web |
Make your platform an alternative to OnUML
See the priceThe sponsored alternative slot on this page is labelled Sponsored.
Questions about OnUML alternatives
What is the best alternative to OnUML?
ArchitectureDiagram.ai, number 1 in AI diagram generators with a score of 7.4 out of 10. The others here: Archway, Creately, Eraser and 16 more.
What is the best free alternative to OnUML?
ArchitectureDiagram.ai is the best-ranked alternative with a free plan. 20 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.