Mailtrack vs. Mixmax

Mailtrack is an email tracking tool for Gmail. It has been running since 2013 and has more than 3 million users. It adds double check marks to your Sent folder — one for delivered, two for read — so you know whether the message you just sent has landed, without leaving Gmail or changing how you work.

Mixmax works inside Gmail so nothing falls through the cracks. Founded in 2014, it's used by people who handle their own outreach — founders, agency owners, recruiters, consultants, fundraisers and small business owners — and by the teams they work with. When you send an email, Mixmax keeps track of it. You can see when someone opens it or clicks a link. If they don't reply, Mixmax reminds you, or sends your next email for you. By default, follow-ups stop the moment the person writes back, so nobody gets another nudge after they've answered.