OGCS alternative
An OGCS alternative that runs in the cloud, on every device
Outlook Google Calendar Sync is a well-loved free tool - if you run classic desktop Outlook on Windows and don't mind being your own administrator. SyncThemCalendars is the managed version of that job: cloud-based, iCloud included, support included.
Start for free14-day free trial · No credit card required
At a glance
| Criteria | SyncThemCalendars | Outlook Google Calendar Sync (OGCS) |
|---|---|---|
| Price | From $3.99/month billed yearly - 14-day free trial | Free and open source |
| Platform | Cloud service - any browser, any OS | Windows desktop app alongside classic Outlook |
| Supported calendars | Google, Outlook / Microsoft 365, Apple iCloud | Google and Outlook |
| Sync engine | Push-based, continuous - works with your PC off | Runs on your PC on a schedule you configure |
| Maintenance | None - we run and monitor the service | You configure, update and troubleshoot it yourself |
| Support | Email support from the team | Community support via GitHub |
Comparison based on each product's public pricing pages and documentation as of July 2026. All trademarks belong to their respective owners. Spotted something outdated or unfair? Contact us and we'll fix it.
Why people pick SyncThemCalendars
No PC babysitting
OGCS syncs when your Windows machine is on and the app is running. A cloud service keeps your calendars aligned around the clock, from any device.
Works without classic desktop Outlook
Microsoft 365, Outlook.com, the new Outlook, Mac - we talk to Microsoft's cloud APIs directly, so no desktop install is required anywhere.
Apple iCloud in the same setup
OGCS is Google-and-Outlook only. If your personal life lives on an Apple calendar, it joins the same sync setup here.
When OGCS might fit you better
OGCS is free, open source and actively maintained. If you run classic desktop Outlook on a Windows PC, don't need iCloud, and enjoy owning the configuration, it can absolutely do the job - the price is unbeatable. We're for people who'd rather have it handled.
Switching takes minutes
Start your free trial
14 days, no credit card. Connect your Google, Outlook or Apple iCloud accounts in your browser.
Recreate your syncs
Pick each source and target calendar, choose one-way or two-way, and set your privacy options. About 2 minutes per sync.
Turn off the old tool
Once you see events flowing, pause or cancel your previous tool so the two don't copy the same events side by side.
Frequently asked questions
Why pay for SyncThemCalendars when OGCS is free?
You're paying for the job being done in the cloud, continuously, without a Windows PC running - plus Apple iCloud support, privacy busy-blocks, and someone to email when a calendar does something strange.
Does it need desktop Outlook like OGCS does?
No. We sync the Microsoft 365 / Outlook.com calendar itself via Microsoft's cloud APIs, so every Outlook client - desktop, new Outlook, web, mobile - sees the result.
Is migration painful?
No - connect your accounts, recreate the sync pairs, then disable OGCS so both tools aren't copying the same events. Most people are done in under 10 minutes.
Ready for calendar sync that just works?
Set up your first sync in 2 minutes. Google, Outlook and Apple iCloud, one-way or two-way, with your privacy protected.
Start for free14-day free trial · No credit card required