Cal.diy: open-source community edition of cal.com

Post by luckydata » Wed, Apr 22, 2026, 12:58 AM UTC

preya2k wrote: post #33

_ache_ wrote: post #18

I just installed calrs, a recent alternative to cal.diy. It absolutely rocks! The only downside is that it requires me to activate STARTTLS as force-TLS-SMTP isn't supported (I had to check the source code). It’s young, very promising, and honestly, I don't know what I could ask for more. I also replaced Radical with rustical, and I gained free push updates. https://cal.rs/ and https://github.com/lennart-k/rustical A…

Seems to be mostly vibe coded.

Post by holistio » Wed, Apr 22, 2026, 2:15 AM UTC

singiamtel wrote: post #34

conradev wrote: post #31

Tempted to buy cal.zone or cal.sucks just to add the paid features to cal.diy. They even made a list! Teams, Organizations, Insights, Workflows, SSO/SAML, and other EE-only features have been removed cal.ws is $630 on Namecheap... the tokens required to build this are cheaper than the domain.

I'm surprised cal.zone is not taken already

Post by Reubend » Wed, Apr 22, 2026, 3:30 AM UTC

Ethee wrote: post #8

FlamingMoe wrote: post #5

From the docs, "It is strictly recommended for personal, non-production use." Wow what a 180 from just a year ago when their blog said, "For companies that handle sensitive information, deploying open-source scheduling software on-premises can offer an extra layer of security. Unlike cloud services controlled by external vendors, on-prem installations let teams maintain full ownership of their infrastructure. " ¹ I j…

I think this is less a bait and switch and more just a legal liability shield. They're not saying you 'cant' use it that way. They just don't recommend you do, and they won't support you at all for doing so. Which I think is completely fair. Also, these two things aren't in contradiction. Deploying on prem does offer more security, but then it's up to you to use it correctly.

Post by sreekanth850 » Wed, Apr 22, 2026, 3:44 AM UTC

pastel8739 wrote: post #44

theturtletalks wrote: post #36

Earlier quoted context omitted.

Not impossible though, I run a directory of open-source alternatives and rarely do you see what Cal.com did. Projects gets abandoned yes, but a pure bait and switch like this really grinds my gears. This is from someone who is self hosting Cal.com right now and now they are going to strip even more features.

Are you really claiming you would rather the project get abandoned?

Post by cortesoft » Wed, Apr 22, 2026, 4:19 AM UTC

bee_rider wrote: post #22

rectang wrote: post #11

Earlier quoted context omitted.

I'm unpersuaded by the assertion that closing the source is an effective security bulwark. From that page: > Today, AI can be pointed at an open source codebase and systematically scan it for vulnerabilities. Yeah, and AI can also be pointed at closed source as soon as that source leaks. The threat has increased for both open and closed source in roughly the same amount. In fact, open source benefits from white hat s…

How are LLMs at reading assembly? I assumed they’d be able to read assembly about as well as any other language… Is there such a thing as a closed source program anymore?