Posteo

Posteo is an independent email provider based in Berlin that prioritizes privacy, sustainability, and security. It operates without ads or tracking and is self-financed by user credits, offering email, calendar, address book, and notes with strong encryption options. All data can be encrypted at the touch of a button, and the service runs on 100% green energy from Green Planet Energy.

• Email, calendar, address book, notes with webmail and a web app supporting 12 colors and Dark Mode
• 2 GB storage per account, upgradeable (up to 20 GB)
• Two-factor authentication (TOTP) and multiple encryption options (crypto mail storage, inbound encryption, end-to-end encryption with S/MIME or OpenPGP)
• TLS with PFS and DANE/TLSA for secure transport
• Anonymous signup and anonymous payment; ad-free and no tracking
• Open-source software with Cure53 external security audit
• Migration service for moving from other providers; aliases; calendars and address books encryption
• Daily backups and encrypted hard disks (dm-crypt/LUKS)

• Privacy-first: no collection of personal data, no tracking, ad-free
• Strong security: end-to-end encryption, crypto mail storage, inbound encryption, S/MIME/OpenPGP
• Sustainability: 100% green energy, no flights, sustainable operations
• Independent financing: self-financed by users; no investors
• European hosting and data protection: servers in German data centres; TLS/DANE; extended security certificate
• Anonymous signup and payment; open-source software; transparency

• 1 EUR per month for full features
• Additional storage: 0.25 EUR per GB per month (2 GB included)
• Additional alias addresses: 0.10 EUR per month (two included)
• Additional calendars: 0.10 EUR per month (three included)
• Optional S/MIME certificate: 3.65 EUR per year