Scheduling and meetings

Cal.com Teams alternatives

3 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

calcom/cal.diythe vendor’s own source47,278MITScheduling infrastructure for absolutely everyone.Open on GitHub schej-it/timeful.app1,682AGPL-3.0Web scheduling platform for finding group meeting times with calendar integration and availability polling.Open on GitHub rbbydotdev/someday1,058MITSelf-hosted calendar availability picker and booking UI built to integrate with Google accounts.Open on GitHub

What you give up either way

Hosted Cal Video (in-house video conferencing)
Cal.ai / managed AI phone agent features
Enterprise SLA, dedicated support & onboarding
Built-in compliance attestations and managed SOC2/HIPAA assurances
Automatic product updates and uptime guarantees

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Cal.com Teams, and it does not prove anyone has run it for a month. How we decide.