Hi, I'm Niraj, Founder, Mailflo. Answers to your questions below: 1. How it works is answered in detail here: https://mailflo.io/help#underthehood https://mail

Hi, I'm Niraj, Founder, Mailflo. Answers to your questions below: 1. How it works is answered in detail here: https://mailflo.io/help#underthehood https://mailflo.io/help#underthehood. Essentially, we use a browser extension to add labels in Gmail, and use our backend to sync labels across Gmail accounts over IMAP. Its based on what we built for our other product GrexIt (http://grexit.com http://grexit.com), which is a very popular tool for Gmail. It needs full IMAP access. And IMAP is enough for Mailflo to work. We do not use any unofficial or Google specific API. 2. Is it free: For now. And we'll always have a free plan. Very similar to what we have done for GrexIt. 3. It works great with multiple accounts (both with 'plain' Gmail and Google Apps accounts). The key motivation for us was to let teams collaborate on customer support by assigning tasks and looking at who is doing what. Glad that you find it useful. Do try it out and let us know if you need any help.