What is the best open-source alternative to Calendly?

The best open-source alternative to Calendly depends on the use case. The highest-PopScore candidates on GitPop are cal.com, n8n.

Is Calendly open source?

No, Calendly is a closed-source product by Calendly LLC. The open-source alternatives on this page are listed by GitPop PopScore (momentum, activity, and noise-filtered).

2 candidates

Open source alternatives to Calendly

Scheduling tool with calendar sync, routing, and team availability. · Calendly LLC

Pricing: Free for individuals; paid from $10/seat/mo

Calendly is the default 'book a meeting' link. The open-source path is to self-host Cal.com (full Calendly replacement) or use the lighter N8N / Activepieces automation stacks. Cal.com is the most direct Calendly replacement in 2026 with a mature self-hosted edition; if you need a more general automation platform that includes scheduling, n8n is the right pick.

The 2 candidates, ranked by PopScore

#01calcom/cal.com
Open-source scheduling platform. The most direct Calendly replacement in 2026, with self-hosting, payments, and routing.
GitHub
#02n8n-io/n8n
Workflow automation with a scheduling node. The right pick when you want scheduling as part of a broader automation pipeline.
GitHub

Related alternatives

Looking for a side-by-side comparison of two open-source projects? The compare matrix has 60+ "X vs Y" pages. Looking for a curated "best of" list for a specific category? See Best AI tools 2026 (and the 7 other category editions).