calrs vs Someday

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

calrs

AGPL-3.0

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

MIT

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

	calrs	Someday
License	AGPL-3.0	MIT
Self-hostable	Yes	Yes
GitHub Stars	207	1,058
Forks	25	58
Open Issues	31	5
Last Commit	Aug 2, 2026	Jul 20, 2026
First Released	Mar 9, 2026	Nov 1, 2024
Categories	Appointment Scheduling	Marketing Automation Time & Task Management Tools
Tags	#self hosted #rust #scheduler #calendar #scheduling	—

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

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