OneCal Pricing 2026: Plans, Costs & Cheaper Alternatives

OneCal pricing starts at $5/month for individuals and has no permanent free tier. A 7-day trial is available, after which you pay or lose access. If you only need Google Calendar and Outlook sync, SYNCDATE starts free — 2 calendars, 2 accounts, no credit card — and the Starter plan is €1.99/month for up to 9 calendars, roughly 60% cheaper than OneCal at the equivalent tier. According to Atlassian's 2024 State of Teams report, 76% of knowledge workers manage events across multiple calendar systems, so pricing and sync reliability matter.

OneCal Plans at a Glance (March 2026)

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Pricing sourced from OneCal.io as of March 2026. Plans may change.

What Each OneCal Plan Includes

Starter (~$5/month)

OneCal Starter targets individual users syncing between Google Calendar and Outlook. Setup is straightforward: connect your accounts, pick which calendars to sync, and OneCal handles the rest. The sync runs on a polling interval — OneCal checks for changes every few minutes, not in real time.

This plan covers a simple one-person workflow. If you need more calendar connections or multiple Google/Outlook accounts, you'll need to upgrade.

Premium (~$10/month)

Premium unlocks more calendar connections and more accounts. It's designed for users who juggle multiple work and personal calendars across both Google and Outlook. A freelancer with two Google Workspace accounts and a personal Gmail would typically land here.

At $10/month, the annual cost is ~$120/year.

Team (Custom pricing)

The Team plan adds multi-user billing and presumably admin controls, though specific features and pricing require contacting OneCal's sales team. There's no published per-user rate.

The Hidden Costs of OneCal

No free tier means a hard deadline to evaluate

OneCal's 7-day trial gives you one week to decide if it works for your workflow. Calendar sync reliability often takes longer to assess — you want to see what happens when a meeting gets moved last-minute or when a sync fails silently. After 7 days, you're paying whether you're confident or not.

Polling sync introduces a lag window

All OneCal plans use polling-based sync. The service periodically checks each calendar for changes, then propagates them. The practical result: if you create a meeting at 9:01am, your synced calendar might not reflect it for several minutes.

This matters if you use scheduling tools like Calendly, Cal.com, or Google's "Find a Time" feature. A stale calendar opens a window where someone can book the slot you just filled, causing a double-booking. Google Calendar's push notification API and Microsoft Graph change notifications both support near-instant webhook delivery — SYNCDATE uses both for ~4-second sync. OneCal does not.

No iCal support

OneCal syncs between Google Calendar and Outlook only. If you subscribe to an external .ics feed — a team sports schedule, a conference agenda, a shared project calendar — you cannot bring it into an OneCal sync. SYNCDATE supports iCal feeds (read-only) as a sync source, so you can pull external calendars into your Google or Outlook without manual work.

Pricing grows with your calendar footprint

OneCal's plan structure means that adding accounts or calendars pushes you to the next tier. A solo user with two Gmail accounts and one Outlook account may outgrow the Starter plan before they've gotten full value from it.

The Math for Common Scenarios

If you sync 2 calendars (one Google, one Outlook):

• OneCal Starter: ~$5/month = ~$60/year
• SYNCDATE: Free. Forever. No credit card.

If you sync 5 calendars across 3 accounts:

• OneCal Premium: ~$10/month = ~$120/year
• SYNCDATE Starter: €1.99/month = ~€24/year

If you sync 10+ calendars across multiple accounts:

• OneCal Premium or Team: $10+/month = $120+/year
• SYNCDATE Pro: €8.99/month = ~€108/year

If you also need iCal feed sync:

• OneCal: Not supported at any tier
• SYNCDATE Starter: Included (iCal as read-only source)

When OneCal Is Worth the Price

OneCal earns its place in specific situations:

You want a very simple, opinionated setup. OneCal's interface is intentionally minimal — connect two accounts, pick calendars, done. If you find SYNCDATE's per-sync configuration model more involved than you want, OneCal's setup is genuinely faster.

You're already paying for it and it works. If your current workflow has no double-booking issues and you're not hitting plan limits, switching incurs friction. Evaluate before switching.

Your team needs a managed multi-user deployment. The Team plan (custom pricing) may suit organizations that need centralized billing and account management.

When OneCal Isn't Worth It

You want to try before committing. Seven days is a short window for evaluating sync reliability. SYNCDATE's free tier lets you test indefinitely with 2 calendars before paying anything.

You need real-time sync. OneCal's polling approach introduces a lag. SYNCDATE uses Google Calendar webhooks and Microsoft Graph change notifications to propagate changes in ~4 seconds. If you use scheduling tools, this difference prevents double-bookings.

You subscribe to iCal feeds. OneCal has no iCal support. If you want to bring a .ics feed into your sync — a team roster, a conference schedule, a client's shared calendar — SYNCDATE is the better fit. See how calendar sync works with iCal for more detail.

You care about data location. SYNCDATE runs on Hetzner's Germany-based infrastructure, is GDPR-compliant, and encrypts OAuth tokens with AES-256-GCM. OneCal doesn't publish equivalent infrastructure details.

You're price-sensitive at scale. SYNCDATE Starter at €1.99/month is roughly 60% cheaper than OneCal's entry paid tier. Over a year, that's ~€36 vs ~$60 for similar calendar coverage. See the calendar sync pricing guide for a full market comparison.

How to Switch from OneCal to SYNCDATE

1. Sign up for SYNCDATE at syncdate.app — free, no credit card required
2. Connect your Google and/or Outlook accounts via OAuth
3. Create syncs matching your OneCal configuration (source and target calendars, direction)
4. Let SYNCDATE run for a day and verify events are appearing correctly on both sides
5. Cancel OneCal once you're satisfied — events already synced remain on your calendars
6. SYNCDATE picks up syncing from that point forward

The migration takes about 15 minutes of setup. Using SYNCDATE's free tier to verify before cancelling OneCal means no overlap cost and no risk.

Related: [OneCal vs SYNCDATE full comparison](/compare/onecal-alternative), [Best calendar sync tools compared](/compare/best-calendar-sync-tool-comparison), [CalendarBridge pricing breakdown](/compare/calendarbridge-pricing), [Reclaim.ai alternative comparison](/compare/reclaim-alternative)