At a glance
| Mermaid + MermaidViewer | Lucidchart | |
|---|---|---|
| Price | Free (Pro optional) | Paid plans for full features |
| Editing | Code + AI | Visual canvas |
| Lives next to code in Git | Yes | No |
| Real-time whiteboarding | No | Yes |
| Renders in GitHub/Notion/Obsidian | Yes | Via exports/embeds |
Why engineers switch to Mermaid
- Diagrams stay accurate because updating them is fast.
- No per-seat licenses for every engineer who needs to edit a diagram.
- AI can generate and update Mermaid diagrams from descriptions or code.
Frequently asked questions
Can I replace Lucidchart with Mermaid?
For technical documentation (flows, sequences, data models, architecture), usually yes. For freeform whiteboarding and highly designed visuals, a canvas tool remains more suitable.