Cal.com
Open-source scheduling
Best for: Developers and privacy-focused teams who want to self-host
Pros
- Full open-source code, self-hostable on your own infrastructure
- Active roadmap and modern UI on par with Calendly
- Workflows and routing forms included in free tier
Cons
- Self-hosting takes real devops time — not zero-config
- Managed cloud pricing has climbed closer to Calendly over 2025-2026
Pricing: Free self-hosted · Cloud from $15/user/mo