Calenso is the Swiss scheduling platform for enterprises with strict data protection needs. Tymeslot is the open-source alternative for individuals and small businesses, with a free plan, one published price and booking pages without ad trackers.
Updated 13 November 2026
Calenso is a proprietary Swiss SaaS built for organisations in insurance, financial services, healthcare and the public sector: servers in Switzerland, ISO/IEC 27001 certification, branch and room management, Swiss payment methods such as TWINT, and CRM and ERP integrations rolled out with its implementation team. It publishes no prices: after a 14-day trial, you subscribe on a quote. Both products take GDPR seriously, so hosting is not the deciding difference. Tymeslot is open source and self-hostable, has a free plan with unlimited event types and a single published Pro price, and keeps ad trackers off its booking pages.
The differences that tend to matter when you're choosing between them.
Tested on 13 November 2026: we loaded Calenso's own demo booking page and a Tymeslot booking page in a fresh browser, without accepting any cookies, and recorded every host contacted. The Calenso demo page
Sources: Calenso plans and pricing Calenso Business plan Calenso Enterprise plan Calenso features Calenso integrations Calenso calendar synchronisation Calenso security and hosting Calenso data processing agreement Calenso online payments Calenso booking page languages Calenso room and resource booking
Tymeslot's free plan has unlimited event types and calendar connections, and you can keep using it for as long as you like. Calenso offers a 14-day trial, after which you need a paid subscription.
Tymeslot Pro is a flat €9/month, listed on the pricing page, and you can upgrade without talking to anyone. Calenso publishes no prices: each plan is an individual offer.
Tymeslot's core is open source under the GNU AGPLv3, so anyone can read how it handles your data, and you can self-host it with every feature included. Calenso is closed software, and the only version it offers publicly is its own hosted service on servers in Switzerland.
Both take data protection seriously. Calenso runs on servers in Switzerland with ISO/IEC 27001 certification. Tymeslot is hosted in the EU (Germany) by an EU company registered in Estonia, and if you self-host, you choose the server yourself.
Tymeslot booking pages load no advertising pixels or third-party analytics: visits are counted by our own self-hosted, cookieless analytics. Calenso offers Google Analytics, Google Tag Manager and Meta Pixel as integrations for its booking widget. On tymeslot.app, Google reCAPTCHA loads once a client starts the booking form, to block spam bookings.
Tymeslot's booking pages, dashboard and emails are available in nine languages. Calenso says its booking widget offers five.
Calenso is a strong product for what it is built for. An insurer with fifty branches, a canton's citizen services or a financial services provider that needs appointments flowing into Salesforce or Microsoft Dynamics will find branch management, room and resource booking, round-robin assignment, SSO and an ISO-certified Swiss data centre, with a team that helps set it all up.
That weight is the trade-off for everyone else. There is no free plan, only a 14-day trial, and no published price: the plans page asks you to request an individual offer. The code is closed, so you cannot inspect it, and the only version Calenso offers publicly is its own hosted service on servers in Switzerland.
Tymeslot is built for people who take their own bookings: consultants, coaches, therapists, tutors and small practices. You can start on a free plan with unlimited event types, see the one Pro price before you sign up, read the source code under the GNU AGPLv3, and self-host it with every feature included. Its booking pages carry no ad trackers, and they speak nine languages. Data protection is a given on both sides; the real difference is how open, how simple and how affordable the tool is.
No tool wins for everyone. Here's how they split.
Choose Tymeslot if…
Choose Calenso if…
Calenso publishes no prices on its website; each plan is quoted on request. Prices checked on 13 November 2026. Tymeslot prices in EUR, including VAT where it applies. See Calenso's current pricing
For individuals and small businesses, yes. Tymeslot covers the core job (booking links, two-way calendar sync, automatic video links, reminders, paid bookings and an embeddable widget) with a free plan, one published price and open-source code you can self-host. For a large organisation that needs branch management, room booking and enterprise CRM integrations, Calenso is the better fit.
No. Calenso offers a 14-day free trial of its Business plan, and after that you need a paid subscription. Tymeslot has a free plan with unlimited event types and calendar connections that does not expire.
Tymeslot Pro is a flat €9/month (€90/year), and self-hosting is free. Calenso does not publish prices on its website; its Business and Enterprise plans are quoted individually, so you need to contact its sales team for a figure.
No. Calenso is proprietary, and the only version it offers publicly is its own hosted service on servers in Switzerland. Tymeslot's core is open source under the GNU AGPLv3 and self-hostable via Docker, Cloudron or Railway, with every feature included.
On tymeslot.app, Tymeslot runs on Netcup servers in Germany and is operated by an EU company registered in Estonia; the Terms include a data processing agreement under Article 28 GDPR. Calendars you connect, such as Google or Outlook, keep their data with their own provider. Calenso runs on servers in Switzerland and has a DPA under both the GDPR and the Swiss data protection act. If you self-host Tymeslot, you decide where it runs.
Yes. Calenso syncs with CalDAV alongside Google, Exchange, Microsoft 365 and iCloud. Tymeslot treats CalDAV as a first-class provider too, so Nextcloud, Radicale, Baïkal, Zimbra, mailbox.org and other CalDAV servers get the same two-way sync as Google, Outlook and Exchange.
When you schedule for a whole organisation: many branches or rooms, round-robin assignment across a team, SSO, PayPal alongside Stripe, or integrations with Salesforce, Microsoft Dynamics or SAP set up by the vendor. Calenso is built for that, and Tymeslot is not.
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
4 January 2026 · 3 min read
Sign up free, connect your calendar and share your first booking link in about five minutes. Upgrade to Pro only when you need payments or automation.