Cal.com vs Outline
Is it time to switch? We break down the differences so you can stop bleeding money.
Choose Cal.com.
If you want to own your data, save money, and avoid vendor lock-in, Cal.com is more popular among developers.
What Actually Matters
No fluff — just the differences that affect your decision
Both open source, different licenses: Cal.com uses MIT, Outline uses Other. Check the fine print if you're building commercial.
Both can run on your own metal with Docker. Full data ownership, no cloud dependency. We have deploy guides for each.
Cal.com leads at 49.0k stars vs 40.9k, but both have solid communities. You won't be alone with either choice.
Both written in TypeScript. Same ecosystem, same talent pool — makes switching easier if you ever need to.
Try both — most offer free tiers. The right pick depends on your stack size, team, and tolerance for DevOps.
Cal.com
The open-source Calendly alternative. Take control of your scheduling.
Why Choose Cal.com
- ✓Self-hosted scheduling — no data leaves your server
- ✓Deeply extensible with a plugin architecture and API
- ✓Round-robin, collective, and managed event types
Drawbacks
- ×Can be overkill for simple use cases
Outline
Fast, collaborative, knowledge base for your team built using React and Markdown.
Why Choose Outline
- ✓Sub-second search across all documents
- ✓Beautifully designed editor with Markdown shortcuts
- ✓Integrates with Slack, Figma, and 20+ tools out of the box
Drawbacks
- ×Hard to self-host (complex storage requirements)
Related Comparisons
Explore alternatives for other tools in Productivity