Nylas Pro
The extensible, open source mail app.
Nylas Pro launched on April 25, 2016 with 375 votes, #30 of 4,301 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 10 years on.
In plain words
Nylas Pro is an open source email application for Mac that emphasizes extensibility. Built for developers and technical users who want customizable email functionality, it allows users to modify and extend the application's capabilities. The software prioritizes openness and flexibility over a locked-down user experience, making it suitable for those comfortable working with open source tools who need a mail client that can be adapted to specific workflows.
written from the facts on this page · September 2026
From the sources
Nylas API lets you integrate with 250+ email, calendar and meeting providers (including Gmail, Microsoft, IMAP, Zoom and others) in 5 minutes. We also provide agent accounts for giving unique identities to your AI Agents under the same API platform.
Capture, transcribe, and extract structured data from meetings. A real inbox and calendar for every AI agent, in one API call. Email, calendar, and meeting data aren't separate integrations. They're one connected layer your product and your AI agents use to read and send across every provider, not just one. Send, receive, thread, and parse across Gmail, Microsoft Graph, Exchange, and any IMAP server. One normalized JSON schema, zero provider-specific branches, first send in five minutes. Google, Microsoft, Exchange, and iCloud through one schema. Embeddable booking components, plus Virtual Calendars for rooms and equipment that have no provider account. Provision both in one API…from nylas.com
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