Cal.com
Open source scheduling infrastructure. The Calendly alternative you can self-host.
What it is
Cal.com is a scheduling platform that lets you share a link, get booked, and let your calendar handle the rest. It started as a Calendly clone in 2021 and has since grown into a complete scheduling infrastructure used by 200K+ users, with features Calendly still charges extra for (team scheduling, payments, workflows).
Why we recommend it
It's the most-loved open source scheduling tool because it has every feature Calendly has and a few Calendly doesn't (white-label self-hosting, custom workflows, native Stripe integration, advanced routing). The free Cloud tier is generous; the self-hosted Docker image is one container; the paid tiers are 50–70% cheaper than Calendly's per-seat pricing.
When to use it
- Individuals who are tired of paying Calendly $8–$16/user/mo
- Teams that need round-robin, collective, or pool scheduling (Calendly charges extra)
- SaaS apps that want to embed scheduling (Cal.com has a robust API + embed SDK)
- Companies that want to white-label scheduling (self-host, replace the Cal.com brand with yours)
Quickstart
Run this in your terminal. Self-hosts locally with Docker or your preferred setup.
$ git clone https://github.com/calcom/cal.com.git && cd cal.com && yarn installSetup
Tags
Integrates with
Common use cases
- →personal-scheduling
- →team-scheduling
- →saas-embed
- →white-label
Pricing
Self-host: free, AGPL. Cloud Free: 1 calendar, unlimited bookings. Teams: $15/user/mo. Enterprise: custom.
Related projects
Activepieces
by Activepieces
Activepieces is an open source no-code automation platform. 300+ integrations, visual flow builder, TypeScript pieces, self-hostable, the modern open source Zapier/Make alternative.
Apache Airflow
by Apache Foundation
Apache Airflow is the original open source workflow orchestrator. Python-defined DAGs, rich UI, 1000+ providers, scalable execution, used by Airbnb, Google, Amazon, and every data team.
Apache Hop
by Apache Foundation
Apache Hop is an open source data orchestration tool. Visual pipeline designer, multi-engine (Spark, Flink, Google Dataflow), metadata injection, Hop GUI for developers. The Pentaho successor.