Alternatives to Posteo
German ad-free email provider with calendar, address book and notes, run on green energy. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Posteo
German ad-free email provider with calendar, address book and notes, run on green energy.
Replacements
Listings that take over the same core job as Posteo.
Mailfence
Encrypted email service from Belgium with OpenPGP support, calendars, contacts and document storage.
Mailfence is a Belgian service with a free tier, OpenPGP in the browser, IMAP, POP and SMTP access, and custom domains, with advanced features on paid plans.
StartMail
Paid private email service from the Netherlands with unlimited aliases and one-click encryption.
StartMail is a paid Dutch service adding unlimited disposable aliases and password-based encryption to any recipient, with business plans available.
Proton Mail
Official Proton Mail apps for reading and sending end-to-end encrypted email on phones, desktops and the web.
Proton Mail adds a free tier and end-to-end encryption by default with its own apps, but standard mail apps need the paid Bridge to connect.
Disroot
Donation-funded platform offering free email, cloud storage, XMPP chat and other privacy-focused online services.
Disroot is free and donation-funded, bundling email with cloud storage and chat, works with IMAP clients, but depends on a small team.
Tuta Desktop
The desktop client for Tuta's encrypted mail service, with end-to-end encrypted mail, calendar and contacts.
Tuta encrypts mail, subject lines, calendar and contacts end to end with a free tier, but offers no IMAP, so existing mail apps cannot be used.
Fastmail
A paid, privacy-focused email, calendar and contacts service with web and mobile apps.
Fastmail is a paid email, calendar and contacts service with EU or USA data residency, custom domains and its own Android and iOS apps.
mailbox.org
A German email and workspace service with mail, cloud storage, video meetings and office tools.
mailbox.org is a paid German provider hosting data under GDPR that adds cloud storage, video meetings and office tools to email.
Gmail
Google's email service, used on the web and through Android and iOS apps.
Gmail is a free, widely supported account with strong spam filtering and AI drafting, but it is a closed service tied to a Google account.
Also worth comparing
These listings name Posteo as their own alternative, so the relationship runs both ways.
HEY
An email and calendar service from 37signals that screens senders before they reach your inbox.
Posteo is a paid German ad-free provider with calendar, address book and IMAP access, a low fixed monthly price and signup without personal details.
Hushmail
An encrypted email service with secure forms and e-signatures, aimed at healthcare and small practices.
Posteo is a low-cost German provider with optional stored-data encryption and IMAP access, aimed at general users rather than healthcare practices.
Migadu
Email hosting for custom domains, priced by usage rather than by mailbox, with webmail.
Posteo is an inexpensive German provider with IMAP, calendar and contact sync, but it is aimed at personal addresses rather than custom domains.
Purelymail
Low-cost email hosting for your own domains, with IMAP, POP3, SMTP and optional webmail.
Posteo is a low fixed-price German provider with calendar and contact sync and signup without personal details, but only 4 GB base storage.
Runbox
A paid, ad-free email service hosted in Norway and powered by renewable energy.
Posteo is a low-cost German provider on green energy, with signup without personal details and optional stored-data encryption.
Yahoo Mail
Yahoo's free web and mobile email service with inbox organisation and AI-assisted features.
Posteo is a paid, ad-free German provider with a low fixed monthly price, signup without personal details, and standard IMAP and POP3 access.
Similar software
Related functionality, not a direct replacement.
Thunderbird
Mozilla’s desktop mail client, with calendar, contacts and a unified inbox, funded by donations rather than ads.
Apple Mail
The email app built into macOS, iOS and iPadOS for reading mail from several providers.
Zoho Workplace
An online suite from Zoho combining mail, team chat, meetings, file storage and office editors.
