Calendly
calendly.com
Send a link and let people book a slot your calendar says is free
Free tier
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cal.com
Open-source scheduling links you can run on your own server.
Cal.com does the same job as Calendly — a booking page backed by your real calendar — but the application is open source, so you can self-host it and keep the booking data. The hosted free tier is unusually generous with event types, buffers and connected calendars, and it plugs into the usual video tools. Team round-robin, routing forms and removing the branding move you onto a paid plan.
Questions
A genuinely usable free tier with paid plans for volume or team features. Team scheduling, routing forms and white-labelling are paid — only the individual booking page is free.
Yes. Cal.com sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
Team scheduling, routing forms and white-labelling are paid — only the individual booking page is free.
Alternatives
Same category or same task, ordered by how closely they overlap.
calendly.com
Send a link and let people book a slot your calendar says is free
doodle.com
Propose several times and let a group tick the ones that work for them
easyretro.io
Runs a retro as a board of cards people add, vote on and group
meet.jit.si
Open-source video meetings guests join in a browser with nothing installed
mentimeter.com
Live polls and word clouds that build on screen as people answer
mural.co
A shared canvas of sticky notes for running a workshop remotely