Cal.com

You share a link, they pick a slot, it shows up on your calendar, and unlike Calendly, you can self-host the entire thing.

The free tier on their cloud gives you one event type, one calendar connection, and unlimited bookings. That's enough for a solo consultant or freelancer. Self-hosting removes all limits: unlimited everything, forever, for the cost of a $5/mo VPS.

Paid plans start at $12/user/mo (Team) for round-robin routing, team scheduling, and multiple event types. Enterprise ($25/user/mo) adds SAML SSO, audit logs, and SLA support.

The catch: self-hosting Cal.com is a real project. It runs on Next.js with Prisma and PostgreSQL. If those words don't mean anything to you, stick with the cloud version. And while the core scheduling works great, some of the polish features (custom branding, advanced routing) are behind the paywall. Calendly is more polished if you don't care about owning the infrastructure.