Both tools sync calendars across Google, Outlook, and Apple. The real differences are in privacy, pricing, and where your data lives. Here's an honest look.
Caltsu never stores event titles or descriptions on its servers. We sync availability, not your data. OneCal processes event data through US-based servers.
All Caltsu infrastructure runs in the EU. For European professionals and companies with data residency requirements, this matters.
Changes propagate the moment a calendar event is created or modified. No background polling intervals. Truly real-time.
Start with up to 3 calendars for free, forever. Pro is €8/month. OneCal has no free plan and starts at ~$8.30/mo when billed annually.
OneCal has been around longer and integrates with more third-party tools and platforms beyond core calendar sync.
OneCal bundles scheduling/booking link features. If you need Calendly-style links alongside sync, OneCal has you covered.
OneCal offers team plans with shared calendars and org-level management. Caltsu currently focuses on individual professionals.