Eraser
Lark
| Feature | Eraser | Lark |
|---|---|---|
| Pricing | Free / from $10/mo | Free / from $12/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.5 / 5 | 4.3 / 5 |
| Best For | engineering-teams, solution-architects, technical-documentation, system-design | startups, asian-market-teams, small-businesses, cross-functional-teams |
| Founded | 2022 | 2019 |
| Diagrams As Code | ✓ | ✗ |
| Ai Diagrams | ✓ | ✗ |
| Whiteboarding | ✓ | ✗ |
| Documentation | ✓ | ✗ |
| Version History | ✓ | ✗ |
| Templates | ✓ | ✗ |
| Collaboration | ✓ | ✗ |
| Messaging | ✗ | ✓ |
| Video Conferencing | ✗ | ✓ |
| Documents | ✗ | ✓ |
| Spreadsheets | ✗ | ✓ |
| Project Management | ✗ | ✓ |
| Approval Workflows | ✗ | ✓ |
✓ Eraser Pros
- AI-generated diagrams from text descriptions
- Code-first diagrams with version control
- Combines docs and diagrams in one canvas
- Purpose-built for technical architecture docs
✗ Eraser Cons
- Limited general-purpose whiteboarding features
- Smaller template library than Miro/Lucidchart
- Not suited for non-technical teams
✓ Lark Pros
- All-in-one suite (chat, docs, video, tasks)
- Very generous free tier
- Fast and responsive
- Built-in approval workflows
✗ Lark Cons
- ByteDance ownership raises data concerns
- Less popular in Western markets
- Some features feel overwhelming
The Verdict
Eraser is built for engineering teams and solution architects, with a focus on diagrams-as-code and ai-diagrams. Lark targets startups and asian market teams and leads with messaging and video-conferencing.
Pricing is close: Eraser starts at $10/mo versus $12/mo for Lark — not a deciding factor on its own.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Feature-wise, Eraser offers broader built-in capabilities (7 features vs 6), while Lark takes a more focused approach — which can mean a simpler, faster onboarding experience.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.