Sidekick is described as 'Email tracking plugin for Gmail' and is an app in the Business & Commerce category. There are more than 10 alternatives to Sidekick for a variety of platforms, including Online / Web-based, Windows, Google Chrome, Microsoft Office Outlook and Chrome OS. The best alternative is Salesflare. It's not free, so if you're looking for a free alternative, you could try SalesHandy or Mailcastr. Other great apps like Sidekick are InStream (Paid), Pointofmail.com (Paid), Vocus.io (Paid) and Yesware (Freemium).
The Intelliverse Email Tracker application lets you know WHEN your email was opened, WHERE it was opened, and on WHAT device. With these insights, you can more strategically plan when to follow up on your email.
STOP Spending Hours Every Day Sending Emails ... Guaranteed! You’re tired of paying for an expensive email service provider, but you want to send all the emails you need each day. So it’s time you met Outflash. Use software you already use.