It&#x27;s not just a regular client-- we&#x27;ve built out features like mail merge, open tracking, link tracking, behavior analytics, Rapportive-like sidebars, send later, emojis, snoozing, templated replies, calendar invites, and more. Nylas Pro also gives you unlimited accounts, so you can connect multiple addresses.<p>Folks using Nylas N1 are coming from the productivity world of ToutApp or YesWare. We&#x27;re really not replacing Office 365 or Google Apps. We&#x27;re looking at building new powerful workflows for people who live in their mailbox, calendar, and address book.<p>(I work at Nylas.)