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Privacy-focused email hosting with office suite and cloud storage
mailbox.org is a German privacy-focused email provider offering encrypted email, calendar, contacts, and cloud storage, powered by 100% renewable energy.
Headquarters
Berlin, Germany
Founded
2014
Pricing
EU Data Hosting
Yes
Employees
11-50
€1/mo
€3/mo
€9/mo
Billing: monthly, annual
Consider these numbers: Gmail processes approximately 1.8 billion accounts worldwide. Google's advertising revenue — built substantially on mining email content and metadata — exceeds 200 billion USD annually. The average Gmail user generates enough behavioural data to be worth an estimated 35-50 USD per year in ad targeting value. You are not Gmail's customer; you are its product.
mailbox.org offers a starkly different proposition. For 1 EUR per month — roughly the cost of a single espresso — you get a private email account hosted in German data centres, protected by German privacy law, powered by 100% renewable energy, with zero advertising and zero data monetisation. The company, Heinlein Hosting GmbH, has been running email infrastructure in Berlin since 1992 and launched the mailbox.org service in 2014.
What makes mailbox.org quietly remarkable is how much it includes beyond email. The Standard plan (3 EUR per month) bundles a calendar, contacts, cloud storage, an office suite (word processor, spreadsheet, and presentation tools via Open-Xchange), custom domain support, and PGP encryption. This is not a stripped-down email service; it is a complete productivity platform that competes with Google Workspace and Microsoft 365 on features while operating on a fundamentally different business model.
The target audience is privacy-conscious individuals, freelancers, and small businesses who want professional email and productivity tools without surrendering their data to advertising platforms. mailbox.org does not try to be flashy — it tries to be trustworthy, affordable, and comprehensive.
mailbox.org's encryption implementation is one of its strongest differentiators. The Guard feature allows you to manage PGP keys directly in the browser. You can generate new key pairs, import existing ones, and encrypt or decrypt emails without installing separate PGP software. Incoming emails can be automatically encrypted at rest using your public key, meaning even if someone gained access to the server, stored emails would be unreadable without your private key.
This browser-based PGP approach is more accessible than traditional PGP setups (which typically require desktop software like Enigmail or GPG Suite), though it is still more complex than ProtonMail's seamless zero-access encryption. The trade-off is flexibility: mailbox.org supports standard PGP, which is interoperable with any PGP-compatible email client, while ProtonMail's encryption works seamlessly only between ProtonMail users.
The inclusion of Open-Xchange's office suite is unexpectedly capable. You get a word processor, spreadsheet editor, and presentation tool that handle common document formats (DOCX, XLSX, PPTX). The tools are browser-based and integrated with the cloud storage, so you can create, edit, and share documents without leaving the mailbox.org ecosystem. They are not as feature-rich as Google Docs or Microsoft 365, but for basic document work — letters, invoices, simple spreadsheets — they are perfectly adequate and operate without any data leaving EU servers.
The calendar supports CalDAV, meaning it syncs with virtually any calendar application (Apple Calendar, Thunderbird, DAVx5 on Android). Contacts sync via CardDAV. Cloud storage ranges from 100 MB on the Light plan to 100 GB on Premium. These are not afterthoughts — they are full-featured implementations that, combined with email, create a genuine Google Workspace alternative at a fraction of the cost and with fundamentally better privacy.
From the Standard plan upwards, you can use your own domain for email. This makes mailbox.org suitable for freelancers and small businesses who want branded email (you@yourbusiness.com) without running their own mail server. Alias support is generous — up to 50 on the Premium plan — which is useful for creating unique addresses for different services and tracking which services sell your email address.
mailbox.org runs on 100% renewable energy. This is not a carbon offset claim — the data centres are powered directly by renewable sources. For users who factor environmental impact into their technology choices, this is a genuine differentiator. Combined with the Berlin location, it means your email infrastructure has both a clean privacy profile and a clean environmental one.
mailbox.org's pricing is its most compelling feature. The Light plan at 1 EUR per month includes 2 GB of email storage, three aliases, and basic calendar and contacts. The Standard plan at 3 EUR per month is the sweet spot: 10 GB email, 5 GB cloud storage, custom domain support, office suite, and full PGP encryption features. The Premium plan at 9 EUR per month provides 25 GB email, 100 GB cloud storage, and 50 aliases.
For context: Google Workspace starts at approximately 6 EUR per user per month. Microsoft 365 Business Basic starts at approximately 5.60 EUR per user per month. ProtonMail's Plus plan costs approximately 4 EUR per month. mailbox.org's Standard plan offers more bundled features than any of these at a lower price point, with stronger privacy guarantees.
The only pricing gap is the absence of a free tier. ProtonMail and Tutanota both offer limited free accounts, which lower the barrier for users wanting to try private email without financial commitment. mailbox.org's 30-day trial partially addresses this, but a permanent free tier with basic features would strengthen its competitive position.
mailbox.org's compliance posture is among the strongest of any email provider. All data is stored in German data centres, subject to German privacy law — which, through the Fernmeldegeheimnis (telecommunications secrecy) provisions, offers some of Europe's most stringent protections for electronic communications.
The company publishes transparency reports detailing government data requests and how they were handled. As a bootstrapped German company with no venture capital investors demanding growth-at-all-costs, there is no business incentive to monetise user data. The revenue model is simple and aligned with user interests: you pay, you get service, your data stays private.
GDPR compliance is comprehensive, with data processing agreements available for business users. The combination of German jurisdiction, PGP encryption, renewable energy, and no-advertising business model makes mailbox.org one of the most trustworthy email services in Europe.
mailbox.org is the quietly excellent email service that deserves far more attention than it gets. For 3 EUR per month, you get email, calendar, contacts, cloud storage, an office suite, custom domain support, and PGP encryption — all hosted in Germany, powered by green energy, with zero data monetisation. The value proposition is outstanding.
The weaknesses are primarily about presentation rather than substance. The web interface is functional but visually dated compared to Gmail or ProtonMail. There is no dedicated mobile app — you configure standard email clients (Thunderbird, K-9 Mail, Apple Mail) via IMAP. The setup requires slightly more technical knowledge than signing up for Gmail. For users willing to invest fifteen minutes in initial configuration, mailbox.org rewards them with a genuinely private, comprehensive, and remarkably affordable productivity suite.
Reasonably easily. mailbox.org supports IMAP migration, so you can transfer existing emails from Gmail using any IMAP-capable client or migration tool. Calendar and contacts can be exported from Google and imported into mailbox.org. The main adjustment is configuring your email client (Thunderbird, Apple Mail, etc.) with the mailbox.org IMAP/SMTP settings. The process takes roughly 30 minutes to an hour for a typical mailbox, depending on how much email you have.
mailbox.org does not have a dedicated mobile app. Instead, you configure your phone's built-in email client (Apple Mail on iOS) or third-party apps (K-9 Mail / Thunderbird on Android) using standard IMAP/SMTP settings. Calendar and contacts sync via CalDAV/CardDAV using DAVx5 on Android or natively on iOS. This approach gives you flexibility in choosing your preferred mail app but requires more initial setup than services with dedicated apps.
Both are German privacy-focused email providers. Tuta uses its own proprietary encryption that encrypts everything automatically but is not PGP-compatible — you can only send encrypted emails to other Tuta users or via a password-protected link. mailbox.org uses standard PGP, which is interoperable with any PGP user. Tuta has a more modern interface and dedicated mobile apps. mailbox.org offers more bundled features (office suite, more storage) at lower prices. The choice depends on whether you prioritise seamless encryption (Tuta) or flexibility and features (mailbox.org).
Yes, particularly for teams of up to around 10-20 people. Custom domain support, shared calendars, and the office suite cover basic business productivity needs. However, mailbox.org lacks dedicated business features like shared inboxes, team management dashboards, and advanced administration tools that platforms like Google Workspace provide. For solo practitioners and very small teams, it works excellently. For larger organisations needing centralised administration, a business-oriented platform may be more practical.
Because mailbox.org uses standard protocols (IMAP, CalDAV, CardDAV), your data is never locked in. You can export all emails at any time using any IMAP client, export calendar data as ICS files, and export contacts as vCard files. Unlike proprietary services with custom encryption (where data export can be limited), mailbox.org's standards-based approach ensures complete data portability. The company's bootstrapped business model and 30-year hosting track record also provide stability assurance.
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