Last checked October 16, 2026
Mailspring
Mailspring is a mail app for Mac, Windows, and Linux. It talks to Gmail, Outlook, and other IMAP accounts. The free app can snooze and track opens a few times a week. There is no phone app.
Open source means you can use, change, and share the code.
The license file in the code is GPL-3.0. The marketing site says MIT. This page follows the license file in the code.
Free plan
The Mac, Windows, and Linux apps are free. A free Mailspring ID can use snooze, send later, reminders, and read receipts a few times a week.
They host it
Mailspring Pro is $8 USD a month, or $85 USD a year. Pro is the unlimited snooze and tracking plan. The mail app itself stays free.
Run it yourself
You put the app on a computer you control. You do not host the mail. Pro features use Mailspring servers.
How close is it?
100 means it does everything the paid app does.
Where we looked
Keep Mailspring correct?
If a license, a price, or a feature mark is wrong, send a correction. A labeled featured listing is $149/mo. Paying never changes rankings or scores, and it cannot take the #1 spot.
https://ditchly.co/software/mailspring