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Cal.com free for open source

What Cal.com gives open source projects, who qualifies, and how to apply. 1 verified offer, last checked 2026-09-07.
FOS-0027 ACTIVE verified 2026-09-07

Cal.com

Cal.com OSS sponsorship (sponsored team plan)
project managementmore tools
What you get
Sponsored (free) access to Cal.com's paid team offering for open source projects (applicants provide their Cal.com team slug); exact plan tier is not specified on the page. In exchange the project must display a "Book us with Cal.com" banner in its footer and README with UTM-tagged links.
Applies to
the project , not individual maintainers
Requirements
no stated requirements
How to apply
Email peer@cal.com with project description, confirmation of criteria, why the free tier is insufficient, your Cal.com team slug, and a link to the repository.
Provenance
Confirmed against cal.com/help/event-types/sponsor on 2026-09-07, matched anchor “Can Cal.com sponsor my open source project”.
Open program page ↗Check your repo →

Verified 2026-09-07. Details changed? Fix it on GitHub. Not sure you qualify? Match your repo against all 176 offers, or browse project management, more tools.