Posteo Alternatives

Posteo is described as 'Web- and IMAP-based email service. 2GB cost 1€/month. Information is hosted on encrypted hard drives. Electricity from renewable resources is used' and is a popular webmail provider in the office & productivity category. There are more than 50 alternatives to Posteo, not only websites but also apps for a variety of platforms, including Android, iPhone, iPad and Android Tablet apps. The best Posteo alternative is Proton Mail, which is both free and Open Source. Other great sites and apps similar to Posteo are Gmail, Tuta Mail, Disroot and mailbox.

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Posteo alternatives page was last updated Dec 1, 2025

Yahoo Mail
121 likes
It's time to get stuff done with the Yahoo Mail app. Get organized with the help of the Mail app.
66 Yahoo Mail alternatives
Cost / License
Freemium (Subscription)
Proprietary
Application types
WebMail Provider
Email Client
Origin
United States
Platforms
Online
Android
iPhone
Android Tablet
iPad
Kindle Fire
+9
Is Yahoo Mail a good alternative to Posteo?
Vivaldi Mail
34 likes
Vivaldi Mail is a free email service with no ads and no strings attached developed by Vivaldi Technologies. It also offers contacts and calendar features, search capabilities, folders management, WEB/POP/IMAP access, 10GB of storage capacity, 20 MB of maximum attachment size...
101 Vivaldi Mail alternatives
Cost / License
Free
Proprietary
Application types
WebMail Provider
Email Client
Origin
Norway
Platforms
Online
Vivaldi
+2
Is Vivaldi Mail a good alternative to Posteo?
Kolab Now
42 likes
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
78 Kolab Now alternatives
Cost / License
Subscription
Open Source
Application types
WebMail Provider
Mail Server
Origin
Switzerland
Platforms
Online
Software as a Service (SaaS)
DAVx5
Is Kolab Now a good alternative to Posteo?
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Fastmail
Fastmail offers secure email hosting with comprehensive webmail services, including IMAP, POP, and SMTP protocols. It supports file sharing, shared folders, large mailboxes, instant messaging, and is compatible with popular email...

https://www.fastmail.com
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Hushmail
19 likes
Commercial email service emphasizing OpenPGP message encryption, SSL/TLS security, two-step authentication, file storage, custom domains, iOS support, spam filtering, ad-free web interface, and secure communications accessible via browsers and existing clients.
Cost / License
Subscription
Proprietary
Application type
WebMail Provider
Origin
Canada
Platforms
Online
iPhone
iPad
Is Hushmail a good alternative to Posteo?
Lavabit
36 likes
This webmail offers great functionality as email without the fluff and intrusion of privacy that other email providers offer. And its free version is comparable to most.
Cost / License
Subscription
Proprietary
Application type
WebMail Provider
Origin
United States
Platforms
Online
Is Lavabit a good alternative to Posteo?
Onion Mail
4 likes
The power of simplicity. Onion Mail can manage emails in the normal network and in the Tor. Onion Mail protect your privacy and anonymity.
31 Onion Mail alternatives
Cost / License
Freemium
Open Source
Application types
WebMail Provider
Email Client
Origin
Italy
EU
Platforms
Online
Android
Is Onion Mail a good alternative to Posteo?
Runbox
6 likes
Runbox offers email hosting, domain hosting, and web hosting services, as well as custom-made email solutions
57 Runbox alternatives
Cost / License
Subscription
Proprietary
Application type
WebMail Provider
Origin
Norway
Platforms
Online
OpenPGP
+2
Is Runbox a good alternative to Posteo?
GMX
76 likes
GMX Mail is a German-based free webmail service provided by GMX (Global Mail Exchange). In addition to an e-mail address, each GMX account includes a Mail Collector, Address Book, Organizer, and File Storage.
62 GMX alternatives
Cost / License
Free
Proprietary
Application types
WebMail Provider
Calendar App
Origin
Germany
EU
Platforms
Online
Android
iPhone
Android Tablet
iPad
+1
Is GMX a good alternative to Posteo?
HEY Email
9 likes
Hey is a new hosted email service launched by the makers of Basecamp , which aims to organize your email inbox. Since they don’t sell ads, or invade your privacy, they charge $99/year for HEY
102 HEY Email alternatives
Cost / License
Subscription
Proprietary
Application types
WebMail Provider
Email Client
Origin
United States
Platforms
Mac
Windows
Linux
Online
Android
iPhone
Android Tablet
iPad
Snapcraft
Is HEY Email a good alternative to Posteo?
Forward Email
5 likes
Forward Email is the best email service, encrypted email service, and fastest email service. It supports unlimited domains and aliases for no extra cost. It uses quantum safe ChaCha20-Poly1305 encryption and offers SMTP, IMAP, POP3, email webhooks, email regular expressions...
Cost / License
Freemium (Subscription)
Open Source
Application type
WebMail Provider
Origin
United States
Platforms
Self-Hosted
Online
Is Forward Email a good alternative to Posteo?
Swisscows.email
5 likes
Swisscows.email is another product of Swisscows AG. This product offers you secure email traffic. With Swisscows.email you can send your emails encrypted so that absolutely no one can read them. The service is comparable to a letter that is protected from prying eyes in an...
60 Swisscows.email alternatives
Cost / License
Subscription
Open Source
Application types
WebMail Provider
Email Client
Origin
Switzerland
Platforms
Online
iPhone
iPad
Android
Android Tablet
+6
Is Swisscows.email a good alternative to Posteo?
AOL Mail
21 likes
FREE e-mail account with IMAP, spam and virus protection with UNLIMITED storage (GMail max. 15 GB). Because of this AOL WebMail is ideal as E-mail archive or E-Mail-Backup utility for other Mail accounts.
Cost / License
Free
Proprietary
Application types
WebMail Provider
Email Client
Origin
United States
Platforms
Windows
Online
Android
iPhone
+1
Is AOL Mail a good alternative to Posteo?

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