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Software · Internet & communication

Mailspring

The best email app for people and teams at work.

  • Limited free plan
  • Windows, macOS and Linux
  • Open source
  • No account

Overview

Mailspring is an email client, available on Windows, macOS and Linux.

Features described in its GitHub repository: plugins and add-ons.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Mailspring is a fast, native email client for Mac, Windows, and Linux — with read receipts, link tracking, send later, grammar checking, and more.” — official website, 10 November 2026
  • “Mailspring's UI is open source (GPLv3) and written in TypeScript with Electron and React - it's built on a plugin architecture and was designed to be easy to extend.” — GitHub, 10 November 2026

At a glance

Mailspring offers a limited free plan; advanced features or heavier use are paid.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Plans and conditions

  • Free plan: basic features are free; others are reserved for paid plans.
  • Paid subscriptions from 8 $ per month (price read on the official page).

Strengths

  • Open source code
  • No account needed
  • No credit card asked
  • Commercial use allowed

Weaknesses

  • Limited free plan

About

Mailspring is a new version of Nylas Mail maintained by one of the original authors. It's faster, leaner, and shipping today! It replaces the JavaScript sync code in Nylas Mail with a new C++ sync engine based on Mailcore2. It uses roughly half the RAM and CPU of Nylas Mail and idles with almost zero "CPU Wakes", which translates to great battery life. It also has an entirely revamped composer and other great new features. Mailspring comes packed with powerful features like Unified Inbox, Snooze, Send Later, Mail Rules, Templates and more. Mailspring Pro, which you can unlock with a monthly subscription, adds even more features for people who send a ton of email: link tracking, read receipts, mailbox analytics, contact and company profiles. All of these features run in the client - Mailspring does not send your email credentials to the cloud.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Unspecified source (platforms) —
  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (limits, free status, commercial use) —
  • Facts collected from Winget (Windows Package Manager) (credit card, account, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Homebrew (platforms) —
  • Facts collected from Wikidata (platforms) —
  • Last technical check: 5 November 2026
  • Description from Flathub — AppStream (Flathub)

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