C
Cal.com does what Calendly does, with the difference that the code is open and you can self-host it, which matters if you do not want your availability data on someone else's server. It handles multiple event types, round-robin routing, and calendar sync with Google and Outlook. The hosted free tier is usable for individuals.
Where it falls short
Self-hosting is real work, and setup is more involved than the commercial alternative.
Alternatives in Productivity
- NotionDocuments, databases, and wikis in one flexible workspace.
- ObsidianLocal-first notes that are just Markdown files.
- LinearIssue tracking that is fast enough to use without thinking.