Posteo vs mailbox

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Posteo compared with mailbox
Detail	Posteo	mailbox
What it does	Green, Secure, Ad-free Email Service	Your digital workspace with email, cloud, office and video conferencing
Stage	Established	Not given
Founded	2009	Not given
Based in	DE	DE
Pricing model	subscription	subscription
Pricing	1 EUR per month with 4 GB storage, upgradeable. Includes email account, calendar, address book, and free support.	Private plans: Light €1/month, Standard €4/month (€3/month annually), Premium €12/month (€9/month annually). Business plans: Silver €25/month, Gold €75/month, Platinum €250/month. Free 30-day trial available.
Key features	4 GB email storage, upgradeable Two-factor authentication (TOTP) Encrypted email, calendar and address book Calendar synchronization via CalDAV Address book synchronization via CardDAV PGP and S/MIME encryption Self-developed migration service Crypto mail storage for entire mailbox Anonymous payment option Multiple colors and Dark Mode	Spam and virus protection Email encryption with PGP and S/MIME Cloud storage with guest access Video conferencing Online office collaboration Calendar and contacts Custom domain names Email aliases Two-factor authentication Centralized admin console
What makes it different	100% ad-free with no user tracking or data trading Powered by 100% green energy from Green Planet Energy Anonymous signup and payment without personal data collection Comprehensive encryption at the touch of a button for laypeople and professionals Self-developed encrypted migration service with no third-party involvement	Hosted exclusively in German data centers subject to GDPR and German data protection law No data analysis, advertising, or tracking - you don't pay with your data Operated with 100% renewable energy BSI C5-certified and ISO 27001-certified security standards Open source foundation with active community contribution
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	73 no change since last check	75 no change since last check
Trust Flow (Majestic)	36	37
Citation Flow (Majestic)	50	52
Referring domains (Majestic)	3509	6236

6 details filled in for both companies.

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