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Cal.com Open Source Sponsorship

by Cal.com

Cal.com sponsors open source projects with free access to their scheduling platform. Projects must display a 'Book us with Cal.com' banner in their README and website footer.

Apply NowView Cal.com program details

Perks

Free Scheduling Platform

Full access to Cal.com's scheduling infrastructure beyond the free tier and open core for qualifying open source projects.

Potential Angel Investment

Commercial open source companies under $2M ARR may also receive a small angel investment from Cal.com's team.

Eligibility

  • The project must be open source.
  • Non-commercial or a commercial open source company with less than $2M in ARR.
  • Must include a 'Book us with Cal.com' banner in the repository README linking to a Cal.com booking link.
  • Must include the same banner in the project website footer.
  • Must use the UTM tag format: ?utm_source=banner&utm_campaign=oss.
  • The free tier or open core must be insufficient for the project's needs.

How to Apply

  1. Ensure your project meets all sponsorship criteria.
  2. Send an email to peer@cal.com explaining your project and confirming eligibility.
  3. Include your Cal.com team slug and a link to your open source repository.
  4. Requests are reviewed on a monthly basis.

Tags

schedulingbookingcalendardeveloper-tools