Cal.com
Scheduling infrastructure for absolutely everyone
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Cal.com - Scheduling infrastructure for absolutely everyone

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Cal.com (formerly Calendso) is the open source Calendly alternative. Self host it, or have it hosted by us. Integrate it seamlessly into your business with advanced customization and the open API.
Designed to be a joy to use for you and your visitors.

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Definitely needed - kudos to Bailey and Peer for the development velocity! Can't wait to see the project unfold 🚀
Maker
Thank you very much Johannes, we managed to get this built in about a month and a half, and we have huge plans going forward for the future. 📈
Finally I found something as an alternative to Calendly! I would work on the monetisation system more properly though, as now it looks like you are not going to earn good money with the product. Good luck guys.
Maker
We've mainly been focused on just getting this launched and available for everyone as open source. We'll be focusing on our SaaS offering, enterprise support and custom integrations (all monetisation methods) soon.
sounds great!
Congrats on the launch! :) Great to see a OS alternative to Calendly. A minor thing I noticed: You can actually confirm a booking without entering any information and just clicking on the "book" button (tried it with demo)
Maker
Thanks! We’re soon implementing more input validation to fix this
Wow, pretty impressive. nice idea with open source! For sure I will contact with you to have a discussion regarding open-source idea.
Maker
Thanks! Feel free to drop us a message at or join our Slack (link is on our website footer). We look forward to speaking with you :)
!Calendso can connect billions of people around the world with open source running their daily business scheduling events - trusted. You guys (, ) are crazy and it feels amazing being part of that. Love to contribute.
Maker
Thanks very much for your kind words! Super glad to have you onboard.
Congrats!! I like that it's open source
Maker
We made it open source because we believe that calendar scheduling should be available to anyone, without cost being a limitation.
I love Open Source alternatives for popular tools! Upvoted!
Maker
Thanks for your support Jacek!
Congrats Calendso team!
Maker
Thanks Janel!
I was so tired of all the different schedulers attempts to fit everyone’s idiosyncratic needs all at once. “Open source Calendly”? Yes, please! Thanks for being awesome
So proud to be an early supporter of
Great, I love that it's open source! 🙌🏼
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