Prime Calendar vs Morgen, OneCal and CalendarBridge
Morgen, OneCal and CalendarBridge exist to get calendars from different providers to agree with each other. Prime Calendar syncs Google and Microsoft 365 too, then adds tasks, routines and automation on top.
| Product | Plan | List price | Per month | At a glance | Source |
|---|---|---|---|---|---|
| Prime Calendar | User | Free plan availableUser: €40 + VAT / yearor €4 + VAT a month, billed monthly | ≈ €3.33 + VAT | Up to 4 screens, unlimited calendars, automation and AI agents (MCP). Browser only for now, no app store app yet. | – |
| Morgen | Individuals | $15 / monthper account, billed yearly | ≈ €13.35 | 14-day trial, no card. | [1] |
| OneCal | Starter | $5 / monthper seat, billed yearly | ≈ €4.45 | 14-day trial, no card. No free plan. | [2] |
| CalendarBridge | Basic | $4 / month†per account, billed yearly | ≈ €3.56 | Trial without a card. | [3] |
Prices as listed on 2026-10-21. Dollar prices converted at that day's ECB rate (1.1234 USD to the euro). Competitors before tax, ours plus VAT. † The vendor page doesn't state this plainly, so check it yourself before relying on it.
Where Prime Calendar makes more sense
You want sync and planning in the same place, and a free plan to start on. How many external accounts you can connect depends on the plan.
Getting started
- Connect your Google or Microsoft 365 account.
- Choose which calendars show up, and in which colour.
- Add the tasks and automation that should run on top.
Where they are the better pick
Sync is their specialty. Morgen and OneCal give you 14 days without a card, and CalendarBridge starts its trial without one as well.
Start on Free. When you need more screens, agents or sync accounts, User is the next step.
Sources
- morgen.so/pricing read 2026-10-21
- onecal.io/pricing read 2026-10-21
- calendarbridge.com/pricing read 2026-10-21
- ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml read 2026-10-21, ECB reference rate
Spotted a mistake? Email info@primecal.eu and we'll fix it within five working days.
All product and company names are trademarks of their respective owners. Using them here does not imply any affiliation with or endorsement by them.