Calendar tool (formerly Cron) acquired by Notion (US) in 2022.
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Ordered by feature parity and migration friction, which is weighted higher than feature breadth.
Figure 1Closest matches to Notion Calendar
Danish circular annual-planner (Visma Plandisc A/S, Højbjerg, 2012), Visma-owned, hosted on Microsoft Azure in Sweden, ISAE 3000.
US-incorporated open-source Calendly alternative (Cal.com Inc, SF) founded by EU developers; production code moving closed-source in 2026.
Nottingham UK developer-API-first calendar / scheduling platform (Cronofy, founded 2013), ISO 27001 + SOC 2; Wise / GoCardless / Indeed customers.
All 3 alternatives, benchmarked against Notion Calendar.
Danish circular annual-planner (Visma Plandisc A/S, Højbjerg, 2012), Visma-owned, hosted on Microsoft Azure in Sweden, ISAE 3000.
US-incorporated open-source Calendly alternative (Cal.com Inc, SF) founded by EU developers; production code moving closed-source in 2026.
Nottingham UK developer-API-first calendar / scheduling platform (Cronofy, founded 2013), ISO 27001 + SOC 2; Wise / GoCardless / Indeed customers.
Beyond compliance: how these alternatives compare on the capabilities you actually use day to day.
| Feature | Plandisc | Cal.com | Cronofy |
|---|---|---|---|
| Payment collection | Not assessed | Yes | Not assessed |
| White-label | Not assessed | Yes | Yes |
| Workflow automation | No | Not assessed | Not assessed |
| Kanban boards | No | Not assessed | Not assessed |
| Gantt / timeline | No | Not assessed | Not assessed |
| Time tracking | No | Not assessed | Not assessed |
| Sprints / agile | No | Not assessed | Not assessed |
| Task dependencies | No | Not assessed | Not assessed |
| Guest / client access | Yes | Not assessed | Not assessed |
| Calendar sync | Not assessed | Yes | Yes |
| Round-robin / team | Not assessed | Yes | Yes |
| Group bookings | Not assessed | Yes | Yes |
| Video integration | Not assessed | Yes | Yes |
| Automated reminders | Not assessed | Yes | Yes |
| Free tier | No | Yes | No |
Source: vendor documentation, as of Aug 2026.
Listed for transparency. Every product on this page is benchmarked against this baseline.
Listed for transparency. Every product on this page is benchmarked against this baseline.
Calendar tool (formerly Cron) acquired by Notion (US) in 2022.
For every product we read the public DPA, sub-processors document, hosting region declaration, and corporate ownership records. Each is timestamped. Signals are editorial, re-verified quarterly. We never accept self-attestation.
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