Posteo alternatives · Email
Posteo alternatives with a Linux app
The Posteo listing does not include a Linux app. 13 of the 73 other email apps in this directory list a Linux app.
Posteo is a paid product, starting at €1 per month, prepaid (minimum top-up €12). 10 of them are free or have a free plan.
13 tools · Listings checked up to Nov 12, 2026 · Where the facts come from
The 12 closest to Posteo
- Free plan · from €3/mo
Tuta Mail
End-to-end encrypted email and calendar from Germany
- Tuta Mail starts at €3 per month, paid yearly (lowest paid personal plan). Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Tuta Mail has a free plan. Posteo does not.
- Only Tuta Mail lists Windows, macOS, Linux, iOS and Android apps.
- Posteo also covers notes.
- Free plan · from $3.99/mo
Proton Mail
End-to-end encrypted email service based in Switzerland
- Proton Mail starts at $3.99 per month, billed every 12 months ($47.88); $4.99 billed monthly. Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Proton Mail has a free plan. Posteo does not.
- Only Proton Mail lists macOS, Windows, Linux, iOS and Android apps.
- Posteo also covers notes.
- Free
Thunderbird
Free, open-source email app for Windows, macOS, Linux and Android
- Thunderbird is free. Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Thunderbird has a free plan. Posteo does not.
- Only Thunderbird lists Windows, macOS, Linux and Android apps.
- Only Posteo lists a web app.
- Free plan · from $35.99/yr
BlueMail
Cross-platform email client with a unified inbox and built-in AI
- BlueMail starts at $35.99 per year (Plus, shown as $3 per month billed annually). Posteo starts at €1 per month, prepaid (minimum top-up €12).
- BlueMail has a free plan. Posteo does not.
- Only BlueMail lists iOS, Android, macOS, Windows and Linux apps.
- Only Posteo lists a web app.
- Paid
Zimbra
Self-hosted email, calendar and file sharing for organizations
- Only Zimbra lists Windows, macOS, Linux, iOS and Android apps.
- Zimbra is self-hostable, according to its own site.
- Posteo is end-to-end encrypted, according to its own site.
- Zimbra also covers tasks.
- Free
Evolution
GNOME's free mail, calendar and address book app
- Evolution is free. Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Evolution has a free plan. Posteo does not.
- Only Evolution lists a Linux app.
- Only Posteo lists a web app.
- Free
Betterbird
A fork of Thunderbird with extra features and bug fixes
- Betterbird is free. Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Betterbird has a free plan. Posteo does not.
- Only Betterbird lists Windows, macOS and Linux apps.
- Only Posteo lists a web app.
- Free trial · from $99/yr
HEY
Email service and calendar with sender screening, from 37signals
- HEY starts at $99 per year (HEY for You, annual billing only). Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Only HEY lists macOS, Windows, Linux, iOS and Android apps.
- Posteo is open source and end-to-end encrypted, according to its own site.
- HEY also covers templates.
- Free trial · from $3/mo
Fastmail
Paid, ad-free email with calendar, contacts and custom domains
- Fastmail starts at $3 per user / month, billed yearly (Basic); Individual is $5, billed yearly. Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Only Fastmail lists Windows, macOS, Linux, iOS and Android apps.
- Posteo is open source and end-to-end encrypted, according to its own site.
- Posteo also covers notes.
- Free plan · from $1/mo
Zoho Mail
Ad-free business email hosting with calendar, tasks and notes
- Zoho Mail starts at $1 per user / month, billed annually (Mail Lite, 5 GB). Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Zoho Mail has a free plan. Posteo does not.
- Only Zoho Mail lists macOS, Windows, Linux, iOS and Android apps.
- Posteo is open source and end-to-end encrypted, according to its own site.
- Free plan · from $8/mo
Mailspring
Open-source desktop email client for Mac, Windows and Linux
- Mailspring starts at $8 per month, or $85 per year (Mailspring Pro). Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Mailspring has a free plan. Posteo does not.
- Only Mailspring lists macOS, Windows and Linux apps.
- Only Posteo lists a web app.
- Free plan · from $5/mo
Newton Mail
Cross-platform email app with read receipts, snooze and send later
- Newton Mail starts at $5 per month, billed annually ($6.99 billed monthly). Posteo starts at €1 per month, prepaid (minimum top-up €12).
- Newton Mail has a free plan. Posteo does not.
- Only Newton Mail lists macOS, Windows, Linux, iOS and Android apps.
- Only Posteo lists a web app.
Common questions
Which Posteo alternatives have a Linux app?
Tuta Mail, Proton Mail, Thunderbird, BlueMail, Zimbra, Evolution, Betterbird, HEY and 5 more list a Linux app.
Does Posteo have a Linux app?
The Posteo listing does not include a Linux app. It lists Web.
Which of these email apps are free?
Tuta Mail, Proton Mail, Thunderbird, BlueMail, Evolution, Betterbird, Zoho Mail, Mailspring and 2 more are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 4, 2026 to Nov 12, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Posteo: the alternatives its listing names first, then the tools that share the most features with it.