Posteo

Posteo is an independent, privacy-focused email service based in Berlin, Germany, that has operated since 2009 with a singular mission: providing secure, sustainable email with the absolute minimum data collection. What makes Posteo exceptional is its radical commitment to data minimization—they don’t just promise not to track you, they’ve architected their entire system to make tracking technically impossible.

Posteo stands alone in the email industry for its approach to payment anonymization. When you pay by credit card, PayPal, or bank transfer, Posteo manually separates your payment information from your account record. This means there is no link between your payment method and your email account—achieving near-anonymous operation even with non-anonymous payment methods. Cash payments by mail are also accepted for complete anonymity.

The company was a pioneer in email security innovation. In 2014, Posteo became the first company in the world to implement DANE (DNS-Based Authentication of Named Entities), preventing man-in-the-middle attacks on email delivery. That same year, they became the first German company to publish a transparency report—a practice that has since become an industry standard.

All Posteo infrastructure runs on 100% renewable energy, and the company is entirely self-financed with no external investors, loans, or debt. This independence means Posteo answers only to its users, not shareholders or investors who might pressure them to monetize data. The service costs just €1/month, making it one of the most affordable privacy-focused email options available.

Posteo was awarded the German Fairness Award in the email providers category in October 2024, recognizing their commitment to ethical business practices. The service includes email, calendar, contacts, and notes—all protected by strong encryption and their industry-leading privacy practices.

Key Features

• Anonymous Payments: Payment info manually separated from accounts
• IP Stripping: IP addresses never attached to outgoing emails
• DANE Pioneer: First worldwide implementation for secure email delivery
• 100% Renewable Energy: Climate-neutral operation since founding
• No Data Retention: No traffic data or IP addresses stored
• €1/Month Flat Rate: Simple, affordable pricing
• Calendar & Contacts: Encrypted calendar and address book included

Privacy Highlights

Posteo’s data reduction policy is among the strictest in the industry. They collect no user data at registration beyond an email address (which can be any address), require no name or personal information, and retain no traffic data such as IP addresses in connection with accounts. Your IP address is never attached to outgoing emails through automatic IP stripping.

All connections use TLS with Perfect Forward Secrecy for IMAP, POP3, webmail, CardDAV, and CalDAV. Servers implement strong AES encryption to protect against unauthorized access. The company’s 2014 transparency report established a standard that many privacy companies now follow.

Privacy Breakdown

Data Residency (Score: 100)

Pros:

• All servers located in Germany
• Full GDPR compliance
• Outside Five Eyes jurisdiction
• Independent German company with no foreign ownership

Cons:

• None identified

Confidence: High — verified through company documentation.

Open Source (Score: 75)

Pros:

• Uses open source Roundcube webmail (modified)
• Only open source JavaScript used
• Recommends open source tools (FreeOTP)
• Transparent about technology stack

Cons:

• Backend systems not fully open source
• Custom modifications not publicly auditable
• Less transparent than fully open source alternatives

Confidence: Medium — based on public documentation.

Privacy Policy (Score: 95)

Pros:

• Industry-leading data minimization
• No IP address retention whatsoever
• Payment information separated from accounts
• No data collection beyond technical minimum
• Transparency report pioneer (2014)

Cons:

• None significant identified

Confidence: High — policy reviewed January 2026, German Fairness Award 2024.

Trackers (Score: 98)

Pros:

• Zero third-party trackers
• No advertising or analytics
• IP stripping on all outgoing mail
• No tracking pixels or web beacons

Cons:

• None identified

Confidence: High — service design prevents tracking.

Terms of Service (Score: 78)

Pros:

• User-friendly terms
• Minimal data requirements
• Clear explanation of service limits
• No broad licensing claims on user content

Cons:

• Standard service limitations
• No free tier (limits accessibility testing)
• Limited features compared to larger providers

Confidence: High — ToS reviewed January 2026.