+++ NEWS +++
The newest versions of Google APIs client Library for .NET dropped support for .NET 4.0.
Minimum requirement for GO Contact Sync Mod (starting with v3.10.0) is .NET 4.5 which is not working on Windows XP.

GO Contact Sync Mod synchronizes your Microsoft Outlook contacts with your Google Mail address book, including pictures, categories and notes.
Since version 3.7.0 it also syncs your Outlook Calendar Appointments on demand to Google Calendar. This Mod fork adds many enhancements and bug fixes to the obviously dead project 'Go Contact Sync'.

Please find some guidelines how to sync your mobile phone contacts with Google Contacts here: http://www.google.com/mobile/sync


  • Full support of OAuth2 - no need for your password!
  • Outlook Contacts sync
  • Outlook Calendar Appointments sync
  • Automatic syncing
  • Contact Pictures support
  • Categories support
  • Supports Outlook 2003, 2007, 2010, 2013 and 2016 (32 and 64 bit)
  • No Support for Outlook Express
  • Select Outlook folder to sync
  • Sync with multiple GoogleMail accounts

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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
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design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5

User Reviews

  • Great Product BUT..... clearly the code is now unsupported. No response from the developers since the end of 2016. It stopped working a few days ago but a suggestion from another company fixed the problem. SO great as long as it works but if there is a problem, or some change in the outlook app or google contacts, then you're unlikely to solve it. If you have a critical dependency on the contacts syncing then find another product that is supported. Sync2 works, with some odd behaviours, but is expensive. But worth it if you need outlook and google sync'd.

  • Do *not* use this. It generated a gazillion new calendar entries at odd dates and times and with no subject. I now face a huge cleanup job killing dummy calendar entries. Also, it makes duplicates of the real appointments now and then. Worst. App. EVER

  • Crashes on Sync. Unusable in current state. My bug logged by many others too - error syncing google calendar :( [Error saving EXISTING Google appointment...] Would LOVE for this to be fixed and to start loving this. Looks very promising...

  • version 3.8 reinstalled not only unable to sync appointments, but contacts conflict (both modified on google and outlook) not working and stopping sync process

  • Gmail requires OAuth and this s/w doesn't support that so after installation, i could not log into Gmail to initiate sync. I've found a paid application (no mention out of respect for this team) that does support the OAuth method of authentication. Google requires a 2nd step for authorization of access through a web page so you have to initially 2-step the authen/author process for these kinds of apps to work. Back to the drawing (or should i say coding) board.

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Additional Project Details



Intended Audience

End Users/Desktop

User Interface


Programming Language