I need to add booking to my website. I stumbled upon cal.com which seemed great. However I’ve run into 2 issues.
My current options for calendars are Protonmail and cpanel/webmail/roundcube.
cal.com doesn’t really work with either of these. For proton its mostly on proton’s side, their calendars are read-only externally + a bit buggy: https://github.com/calcom/cal.com/issues/5756
Roundcube uses caldav, and cal.com’s support is still in beta with most caldev’s being unsupported: https://github.com/calcom/cal.com/issues/3457
Roundcube got me the farthest but the booking emails just don’t get sent and the calendar event pops up maybe an hour later + there’s 75% the booking just doesn’t work. I was told this was the calendars fault 😂.
SO
Are there any selfhosted calendar implementations that support ics feed, external viewing ,etc etc that I can throw on a standard webserver?
Or are there any better foss booking systems?
I just need to book clients and connect it back to a working calendar that’s not locked to a desktop. I thought this would be a solved problem in 2026…
I’m not trying to pay for yet ANOTHER software on top of business mail, and a webserver.
Thanks.


Now shitty paid software? I could rant for days.
I’m saving nextcloud for when I need to scale and have more hardware.
I bought an old Lenovo hotel front desk computer I was going to turn into a router, but it didn’t have a pcie slot. So after I got the right computer and turning that into my router, I used that wrong computer as my nextcloud host (Debian, docker, AIO Nextcloud). It works well enough for people seeing my availability, family calendar, file server front end, and CardDAV. I don’t think it of be able to handle video/audio calls because of the hardware though.