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SPECIFICTION
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Mailspring

getmailspring.com

Free plan WindowsmacOSLinux
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Spec score 9.0 #9 of 142 in Email clients

What it is

Mailspring is a desktop email client for Linux, macOS, and Windows, with support for multiple accounts in one inbox. It connects to Gmail, iCloud, Office 365, Fastmail, Outlook.com, Yahoo!, and IMAP/SMTP providers, and indexes email for advanced Gmail-style searches across connected accounts. The client works offline and supports scheduled sending. Its free features include undo send, spell and grammar checking, custom themes, dark mode, and localization. Pro adds read receipts, link tracking, send later, follow-up reminders, templates, contact profiles, snoozing, and mailbox insights. Mailspring connects to mail providers through IMAP and to calendars and contacts through CalDAV and CardDAV, though calendar tools are not included in the app. It can translate drafts into Spanish, Russian, simplified Chinese, French, and German, and offer to translate incoming messages. Mailspring says credentials are kept in the system keychain and email is not processed in the cloud. The free plan is available; Pro costs $8 a month, billed monthly.

Spec sheet

Product
Mailspring is a native desktop email client for people who take email seriously.Read 4 Oct 2026 · getmailspring.com
Platforms
Downloads are offered for Windows, macOS, and Linux, including Windows ARM64, Apple Silicon, and Linux ARM packages.Read 4 Oct 2026 · getmailspring.com
Free plan
YesRead 21 Sep 2026 · getmailspring.com
Integrations
Mailspring syncs directly with mail providers using IMAP and with calendars and contacts using CalDAV and CardDAV.Read 4 Oct 2026 · getmailspring.com
Security
Email credentials are stored in the system keychain, and Mailspring says it does not transmit, store, or process email in the cloud.Read 4 Oct 2026 · getmailspring.com
Support
For security vulnerability reports, the maker gives [email protected] and says users can expect a response within a few hours.Read 4 Oct 2026 · getmailspring.com
Headquarters
San Francisco, California, United StatesRead 28 Sep 2026 · getmailspring.com
Company
Mailspring is built and maintained by Foundry376, described by the maker as a small, independent team with no outside investors.Read 4 Oct 2026 · getmailspring.com
Accounts
It supports multiple accounts, including Gmail, iCloud, Office 365, Fastmail, Outlook.com, Yahoo!, and IMAP/SMTP providers, in a unified inbox.Read 4 Oct 2026 · getmailspring.com
App coverage
desktopRead 21 Sep 2026 · getmailspring.com
Calendar tools
NoRead 21 Sep 2026 · getmailspring.com
Cloud data
Mailspring says it provides a way to delete information it stores in the cloud in compliance with GDPR.Read 4 Oct 2026 · getmailspring.com
Free features
The free client includes undo send, spell checking, grammar checking, custom themes, dark mode, and localization.Read 4 Oct 2026 · getmailspring.com
Offline access
YesRead 21 Sep 2026 · getmailspring.com
Open source
The maker says the full codebase is open source under the MIT license.Read 4 Oct 2026 · getmailspring.com
Pro features
Pro includes read receipts, link tracking, send later, follow-up reminders, templates, contact profiles, snoozing, and mailbox insights.Read 4 Oct 2026 · getmailspring.com
Scheduled sending
YesRead 21 Sep 2026 · getmailspring.com
Search
Mailspring indexes email to support advanced Gmail-style searches across connected accounts.Read 4 Oct 2026 · getmailspring.com
Translation
Mailspring can translate draft messages into Spanish, Russian, simplified Chinese, French, and German, and can offer to translate incoming messages.Read 4 Oct 2026 · getmailspring.com
Unified inbox
YesRead 21 Sep 2026 · getmailspring.com

Plans and prices

Basic Price not published Unlimited accounts Read 21 Sep 2026 · getmailspring.com
Mailspring Pro $8 a month Billed monthly Unlimited snooze · Unlimited send later · Follow-up reminders · Read receipts · Link tracking · Templates Read 21 Sep 2026 · getmailspring.com
Free Free Free email client and features · Pro features can be tried a few times each week Read 4 Oct 2026 · getmailspring.com
Mailspring Pro $8 a month $8/mo Templates · contact profiles · follow-up reminders · read receipts · link tracking · send later · grammar check · company overviews · snooze messages · mailbox insights Read 4 Oct 2026 · getmailspring.com

Every Mailspring plan and price →

Strong points and limits

Strong points

  • Combines multiple providers in a unified inbox
  • Indexes mail for advanced cross-account searches
  • Works offline and supports scheduled sending
  • Free plan includes spell and grammar checking

Limits

  • Calendar tools are not included in the app
  • Pro costs $8 a month, billed monthly

Who it suits

Mailspring suits people who manage several email accounts from a desktop inbox and want offline access and indexed search. Pro may suit users who need read receipts, follow-up reminders, or templates.

Verdict

Mailspring combines multi-account email, offline access, and indexed search across Linux, macOS, and Windows. The free client covers core features, while read receipts, reminders, and other listed extras require Pro.

Where Specifiction places it

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