Cal.com vs calrs

Comparing two open source alternatives to Calendly. Use the comparison below to decide which one fits your needs.

Cal.com

AGPL-3.0

Open-source scheduling infrastructure — a self-hostable alternative to Calendly for booking meetings and appointments.

AGPL-3.0

A fast, self-hostable scheduling platform written in Rust, like Cal.com but without Node.js or a database server.

	Cal.com	calrs
License	AGPL-3.0	AGPL-3.0
Self-hostable	Yes	Yes
GitHub Stars	48,603	257
Forks	15,190	37
Open Issues	1,430	34
Last Commit	Sep 20, 2026	Sep 20, 2026
First Released	Mar 22, 2021	Mar 9, 2026
Categories	Collaboration & Communication Tools	Appointment Scheduling
Tags	#project management #scheduler	#self hosted #rust #scheduler #calendar #scheduling

Cal.com48,603

calrs

Open source Calendly alternative that runs on Cloudflare’s free tier with Google Calendar and Outlook sync.

Free, self-hostable meeting scheduler built on Google Apps Script — a Cal.com and Calendly alternative for Gmail users.