Excalidraw vs Tettra — Which One Wins?
A detailed, side-by-side comparison of Excalidraw and Tettra to help you pick the right tool for your workflow.
Quick Verdict
Excalidraw takes the lead with a 4.7 rating and is best for developers wanting quick, informal technical diagrams. Tettra (4.1) is the better pick if you need slack-heavy teams who want instant ai-powered answers from their knowledge base..
Side-by-Side Comparison
| Criteria | Excalidraw | Tettra |
|---|---|---|
| Rating | ★★★★★ 4.7(110) | ★★★★ 4.1(45) |
| Pricing Model | free | freemium |
| Starter Price | Free | $8.33/user/mo (Scaling) |
| Free Tier | Yes | Yes |
| Platforms | Web, VS Code Extension | web |
| Learning Curve | Easy | easy |
| API Available | Yes | Yes |
| Best For | Developers wanting quick, informal technical diagrams | Slack-heavy teams who want instant AI-powered answers from their knowledge base. |
| Verdict | Best Free Whiteboard | situational |
Feature Checklist
| Feature | Excalidraw | Tettra |
|---|---|---|
| Hand-Drawn Style | — | |
| Real-Time Collaboration | — | |
| Library System | — | |
| Encryption | — | |
| Open Source | — | |
| AI answers in Slack | — | |
| Knowledge verification reminders | — | |
| Question routing to experts | — | |
| Documentation suggestions | — | |
| Simple editor | — | |
| Analytics on knowledge gaps | — |
Excalidraw
Pros
- ✓Completely free and open-source
- ✓Charming hand-drawn aesthetic
- ✓Zero setup — works in browser
Cons
- ✕Not for professional diagrams
- ✕Limited shape library
- ✕Collaboration features basic vs Miro
Tettra
Pros
- ✓Slack-native AI answers team questions instantly
- ✓Question routing ensures knowledge gaps get filled
- ✓Verification reminders keep documentation current
Cons
- ✕Value proposition tied to Slack usage
- ✕Wiki features are basic compared to Confluence or Notion
- ✕Smaller platform with limited customization
The Bottom Line
Both Excalidraw and Tettra are solid tools in the Cloud Storage & Collaboration space. Excalidraw edges ahead with a stronger overall rating (4.7 vs 4.1) and is the better choice for developers wanting quick, informal technical diagrams. However, if you prioritize slack-heavy teams who want instant ai-powered answers from their knowledge base., Tettra is worth serious consideration. We recommend trying the free tier or trial of each before committing.