Use the vendor’s own cloud
Cal.com also sells a hosted product at cal.com.
Deploy Cal.com
Booking pages you can host, in the same job as Calendly.
Run it with Docker
A docker-compose.yml file is in the repository. You still pay for a server.
Done for you by SeatLess
SeatLess installs this and hands the system over. Price is quoted per project. This does not pin the app above higher scores.