What is Posteo used for?

Posteo is an ad-free, privacy-focused email provider that also offers synchronized calendars and address books, powered by renewable energy. It is a good fit for leaving an ad-supported mail provider; and keeping email, calendar and contacts in sync privately.

How much does Posteo cost?

Paid plans for Posteo start at €1 per seat per month, and there is no free plan.

Is Posteo open source?

No. Posteo is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Posteo include Tuta, Forward Email and docker-mailserver.

What are some alternatives to Posteo?

Posteo competes with mailbox.org, Proton Mail and Fastmail. For open-source options, see Enlisted's ranked list of open-source Posteo alternatives.

Posteo: features, pricing and alternatives

About Posteo

Posteo is an independent email provider that emphasizes sustainability, privacy and an ad-free service. Accounts come with email, calendar and address book that can be synchronized across devices, and the company says it applies comprehensive encryption.

Its site highlights topics such as anonymised payment options, a transparency report, encryption features and its green energy approach, and it supports passkey login. The company is based in Germany and operates a lab in Berlin. The interface is available in German, French, Spanish and English.

Posteo is a hosted, paid service whose business model does not rely on advertising. It suits individuals who want a no-frills private mailbox with calendar and contacts rather than a full office suite.

Key features

Email with synchronized calendar and address book
No advertising in the service
Comprehensive encryption options
Anonymised payment methods
Passkey login support

Good fit for

→Leaving an ad-supported mail provider
→Keeping email, calendar and contacts in sync privately

Tags: email; privacy; ad-free; encryption; calendar; contacts; sustainability

Posteo: questions and answers

What is Posteo used for?: Posteo is an ad-free, privacy-focused email provider that also offers synchronized calendars and address books, powered by renewable energy. It is a good fit for leaving an ad-supported mail provider; and keeping email, calendar and contacts in sync privately.
How much does Posteo cost?: Paid plans for Posteo start at €1 per seat per month, and there is no free plan.
Is Posteo open source?: No. Posteo is proprietary (closed-source) software and can't be self-hosted. Open-source alternatives to Posteo include Tuta, Forward Email and docker-mailserver.
What are some alternatives to Posteo?: Posteo competes with mailbox.org, Proton Mail and Fastmail. For open-source options, see Enlisted's ranked list of open-source Posteo alternatives.