Cal.com announced in 2026 that it is going closed-source: new versions are proprietary, and the only free self-hostable option is now cal.diy, a separate MIT fork scoped to personal use. Tymeslot is open source and self-hostable, with the complete product in every install.
Updated September 15, 2026
Until 2026, Cal.com was the best-known open-source scheduler - AGPLv3 open core and self-hostable, with a deep API. That changed: Cal.com moved its production code closed-source (v6.2, from March 2026, was the last AGPL release), so new versions are proprietary. The free self-hostable option is now cal.diy, a separate MIT community fork scoped to personal, non-production use that drops teams, organisations, SSO, workflows and routing forms. Tymeslot is the open-source alternative that keeps what people came to Cal.com for: self-hostable end to end, CalDAV-first, EU-based, one Elixir app plus Postgres, flat pricing, and the complete product free to self-host.
The differences that tend to matter when you're choosing between them.
Tested on September 15, 2026: we loaded Cal.com's own demo booking page and a Tymeslot booking page in a fresh browser, without accepting any cookies, and recorded every host contacted. The Cal.com demo page
Sources: Cal.com pricing Cal.com is going closed source What was removed from cal.diy The cal.diy repository Cal.com CalDAV app (beta) cal.eu closing on 1 November 2026
Tymeslot is a single Elixir/Phoenix app plus Postgres: one container, a five-minute setup, sensible defaults. Self-hosting Cal.com means running its full Next.js stack and infrastructure.
Tymeslot is built for non-technical users: set up event types and a booking page without touching code. Cal.com is developer-first, with a steeper learning curve.
Tymeslot Pro is a flat €9/month, and self-hosting is free with full feature parity. Cal.com's managed plans are billed per user, so cost grows with your team.
Tymeslot's self-hosted build ships the complete product: payments, automation, themes, embeds and i18n, with nothing gated. Cal.com's own production code is now closed-source, so the only free self-host route is cal.diy.
cal.diy, the MIT community fork, is scoped to personal, non-production use and drops teams, organisations, SSO/SCIM, workflows, routing forms and analytics. Tymeslot self-hosts the whole product for free.
Tymeslot ships ready-made booking flows and guidance for specific professions - coaches, therapists, photographers and more - rather than a blank, build-it-yourself platform.
Tymeslot booking pages load no advertising pixels or third-party analytics: visits are counted by our own self-hosted, cookieless analytics, and connected calendars only ever expose busy/free - never event details.
For a long time this was the comparison where the headline differentiators cancelled out: both open source, both self-hostable, both CalDAV, both EU. That stopped being true in 2026. Cal.com moved its production code closed-source, so new versions are proprietary, and the only free self-hostable option is now cal.diy - a separate MIT fork scoped to personal use that drops teams, organisations, SSO, workflows and routing forms. Cal.com is also closing cal.eu, its EU-hosted cloud, on 1 November 2026.
So the four things people came to Cal.com for no longer all hold. Tymeslot keeps every one of them: open source under the GNU AGPLv3 - the same licence Cal.com left behind - self-hostable end to end with the full product included, CalDAV as a first-class provider, and EU hosting or self-host anywhere. On top of that it is the smaller stack (one Elixir app and Postgres), a five-minute setup, and flat pricing instead of per-seat.
Choose Cal.com, or its paid cloud, if you want its developer platform and large API and don't mind a proprietary production codebase. Choose Tymeslot if you want scheduling you can still self-host in full, for free, with your data and the source in your hands.
No tool wins for everyone. Here's how they split.
Choose Tymeslot if…
Choose Cal.com if…
Cal.com pricing in USD. Per-user tiers shown at the annual rate; month-to-month is higher. Cal.com moved to closed source in April 2026; v6.2 was its last AGPL release. Prices checked on September 15, 2026. Tymeslot prices in EUR; VAT may apply. See Cal.com's current pricing
Tymeslot is the lighter option: a single Elixir/Phoenix app plus PostgreSQL, deployable via Docker, Cloudron or Railway in roughly five minutes, with the full product included. Cal.com's production code is now closed-source, so the free self-host route is cal.diy (MIT, personal use), which runs the full Next.js stack and leaves out teams, SSO and workflows.
Not for its production product. In April 2026 Cal.com moved its production codebase closed-source; v6.2 was the last AGPL release, and newer versions are proprietary. The remaining free, self-hostable option is cal.diy, a separate MIT community fork scoped to personal, non-production use that drops teams, organisations, SSO, workflows and routing forms. Tymeslot's core is open source under the GNU AGPLv3 - the same licence Cal.com just left - free to use, self-host, modify and redistribute, with share-alike the only obligation, and its self-hosted build ships the whole product with nothing gated.
Tymeslot Pro is a flat €9/month (€90/year) regardless of team size, with a free plan and free self-hosting. Cal.com's managed plans are billed per user ($12/user/mo Teams and up, billed annually), so cost scales with headcount.
Yes, though not to the same degree. Cal.com offers a CalDAV app, still marked beta, verified with servers such as Nextcloud, Radicale and Baïkal. Tymeslot treats CalDAV as a first-class provider alongside Google and Outlook, with guided setup for Nextcloud, Radicale, Baïkal, Zimbra, mailbox.org and Apple iCloud.
Tymeslot. It's built so anyone can set up event types and a booking page without code, and ships profession-tuned booking flows out of the box. Cal.com is developer-first, with a steeper learning curve.
I put out the first version of Tymeslot two days ago. I built it because the scheduling tools I tried were either dated or too heavy to run myself.
Luka Breitig
January 04, 2026 · 3 min read
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