Gmail

Description

Zapier has an amazing drag-and-drop interface for automatically pushing data between over 350 popular apps or tasks, including Gmail.

If Zapier can ‘zap’ it, then you can pretty much set it up using our respective API keys and forget about it. You can also create zaps in each direction – say, to create a new contact in Gmail when a subscriber is added, or vice versa. You can also receive a customized plain-text email or SMS whenever a new subscriber is added to your list, by simply creating a zap.

Also worth mentioning is Zapier’s ability to automatically unsubscribe people from your lists – for example, if their email address features in a Google Spreadsheet. This is very useful when cleaning your lists, say, to remove competitors or to process manually-received unsubscribe requests.
Zapier is priced according to the number of zaps and synchronization frequency you need. For more information and to give it a try, zip over to Zapier.