[md5wasp]

I've contributed to this repo (and I also self host Calendly) and didn't have to sign anything.

It _is_ a pain to self-host, but unlike claims elsewhere in this thread I do also self-host the API and database.

[pcthrowaway]

> and I also self host Calendly)

Is the core of Calendly open-source?

I skimmed their repos but it looks like they don't include the "secret sauce" to self-hosting your own event+booking platform: https://github.com/orgs/calendly/repositories