As of 6 Nov 2026, the panel rates mailbox.org Business 3/5 and Tuta Business 3/5 in Business Email & Office Suites. Weighted by what each judge cares about, 5 of the 6 judges pick mailbox.org Business and 1 picks Tuta Business. mailbox.org Business scores higher on 4 of 7 criteria (Calendar, contacts & office apps, Migration, open standards & exit, Administration, identity & partner management, plus 1 more). Tuta Business scores higher on 3 of 7 criteria (European sovereignty, Security, encryption & compliance archiving and Pricing transparency). Provenance — mailbox.org Business: EU-Made; Tuta Business: EU-Made. Ratings are the AI panel’s opinion, formed from public evidence: how scores are made.
mailbox.org Business leads four criteria — mail and deliverability (5.5 vs 5.0; four lean), calendar and office (5.5 vs 4.0; five lean), administration and identity (5.3 vs 4.2; five lean), migration and portability (5.0 vs 3.8; five lean). Tuta Business leads sovereignty (8.2 vs 6.0; five lean, one tie), security and compliance (7.0 vs 5.7; two lean, four tie) and, on mean, pricing transparency (6.5 vs 5.8; leans split two mailbox.org Business, one Tuta Business, three tie). Weighted totals favor mailbox.org Business for the IT administrator (6.3 vs 5.3), public-sector IT lead (6.8 vs 5.5), IT service provider (6.8 vs 5.2), skeptic (6.4 vs 5.7); the data protection officer totals 5.7 for Tuta Business against 0; the small-firm owner shows no total. Both carry the same EU made provenance, and each recorded sovereignty attribute — legal entity jurisdiction, data residency, hosting options, open source, DPA, TIA — reads "unknown."
Choose mailbox.org Business if
You need IMAP or POP3 access for desktop clients: four of six judges lean mailbox.org Business on mail and deliverability (5.5 vs 5.0), and the Tuta Business verdict records a vendor-stated absence of IMAP and a 100 emails-per-hour cap.
Your team wants calendar, browser office editing, drive and video meetings in one bundle: calendar and office scores 5.5 vs 4.0 with five judges leaning mailbox.org Business, and the Tuta Business verdict found no public information on document co-editing.
You are moving accounts from Gmail, Outlook.com or T-Online: migration and portability leans mailbox.org Business five to one (5.0 vs 3.8), and the published Audriga list names those sources.
You are a public-sector IT lead or IT service provider: those weighted totals read 6.8 vs 5.5 and 6.8 vs 5.2 for mailbox.org Business.
Your priorities match the IT administrator's or the skeptic's: those weighted totals read 6.3 vs 5.3 and 6.4 vs 5.7.
Choose Tuta Business if
You need end-to-end encryption the vendor states even it cannot read: security and compliance scores 7.0 vs 5.7, with two judges leaning Tuta Business and four tied, crediting quantum-safe encryption.
Sovereignty is your deciding criterion: Tuta Business scores 8.2 vs 6.0, five judges lean its way with one tie, and the verdict credits hosting on its own servers in ISO 27001 certified data centres in Germany.
Your compliance file needs a published data processing agreement and a named SySS penetration test, both recorded in the Tuta Business verdict.
Your data protection officer holds the deciding vote: that judge's weighted total reads 5.7 for Tuta Business against 0 for mailbox.org Business, whose verdict records that judge's scores as 0 on the same seven criteria.
Read this comparison as one judge. Each weighs the same scores by what they care about.
The Skeptic
Has seen "hosted in Germany" from a provider whose spam filter and support desk sit in the United States, "Exchange-compatible" that meant IMAP with a calendar plug-in, and a first-year price of one euro that became seven. Asks which protocols Outlook really uses, whether the archive would survive a tax audit, what the certification actually covers — and how ten years of mail, calendars and contacts would leave.
mailbox.org Business
This judge's pick
Tuta Business
Criterion by criterion
Mail, domains & deliverability
mailbox.org Business
Mail runs on Webmail, IMAP and POP3, and the domain set-up is documented to a level I rarely see: four DKIM keys as CNAME records, SPF and DMARC policy guidance, MX targets, TXT validation and a catch-all mailbox, with DANE, DNSSEC and MTA-STS recognised by the BSI secure-mail-transport mark. But Outlook reaches the service only as an IMAP account with app passwords or via the third-party CalDAV Synchronizer — we found no public information on Exchange ActiveSync or native MAPI, on send or attachment limits, or on a quarantine an administrator can review.
Tuta Business
Custom domains get an unusually concrete DNS walkthrough — ownership TXT, MX, SPF, DKIM, MTA-STS and a recommended DMARC record — plus catch-all, shared mailboxes, a self-learning spam filter with custom rules and inbox rules with regular expressions. But the vendor states plainly that IMAP is not offered and is replaced by its own desktop and mobile clients, and we found no public information on POP3, Exchange ActiveSync or native Outlook access; the terms also cap sending at 100 emails per hour and prohibit bulk mailings, and we found no public information on the deliverability of the outbound infrastructure.
Calendar, contacts & office apps
mailbox.org Business
Shared calendars and address books, tasks, browser office editing with live co-editing, a Drive with iOS and Android apps, and video meetings sit in one bundle, and CalDAV/CardDAV set-up is documented client by client. What a company would actually schedule with is thinner: we found no public information on free/busy lookup, room or resource booking, or delegated calendar access; the webclient cannot subscribe to external calendars; and Outlook synchronises only through the third-party CalDAV Synchronizer.
Tuta Business
Calendars share with read-only, read-write and manage-sharing levels, invite via iCal, import and export as.ics, and encrypt reminders so thoroughly that the notification time is hidden from the servers, with desktop and mobile apps and offline access. We found no public information on free/busy lookup, room and resource booking, tasks or video meetings, and the file store is in closed beta with no public information on document editing or co-editing; the vendor's own comparison page puts a dash next to CalDAV support.
Security, encryption & compliance archiving
mailbox.org Business
PGP and S/MIME in the webmailer with an explicit refusal of any provider-side key recovery, multiple virus scans, and a transparency report with published rejection rates for three years are more than most providers show, and ISO 27001 and BSI C5 are stated as held. For a regulated buyer the archive question stays open: we found no public information on GoBD-compliant archiving, retention policies, legal hold or eDiscovery, two-factor sign-in is optional rather than enforced, and the seven-day backup snapshot is expressly not a contractual entitlement.
Tuta Business
Mail, calendar and contacts are end-to-end encrypted by default with quantum-safe algorithms, keys generated locally, and the provider stating it cannot read content — the open-source clients, a SySS penetration test and admin-enforceable second factors give those claims some footing. But the GoBD claim arrives as a slogan: we found no public information on audit-proof archiving, retention policies, legal hold or a transparency report, and ISO 27001 is stated for the data centres rather than the service. The captured pages also give different pictures on backups — the business page advertises automatic backups while the terms put timely storage and backup of the data on the customer.
Administration, identity & partner management
mailbox.org Business
The admin console covers mailboxes, domains, forwards, passwords and storage, with an API, CSV account creation, central spam, virus and IP-list controls, and a reseller tier that manages several customer organisations with white-label billing and invoice export; support response times are stated per plan. Identity is the weak flank: single sign-on is offered but no SAML or OpenID Connect is named, and we found no public information on Active Directory, Entra ID or LDAP sync, SCIM provisioning, mobile device policies with remote wipe, or exportable audit logs.
Tuta Business
An administration console with multiple admin roles, user management, sign-in-as-user, centralized billing and whitelabel is documented, and administrators of paid multi-user accounts can require every user to add a second factor. We found no public information on single sign-on, directory synchronisation, SCIM provisioning, a documented API, mobile-device policies or remote wipe, and support is email or priority email with no response times stated. That is administration for a small or mid-sized firm, not a corporate identity layer.
Migration, open standards & exit
mailbox.org Business
Getting in is genuinely documented — the Audriga service moves mail, calendars, contacts and files from a published provider list, a migration assistant sits in the suite alongside manual drag-and-drop, and calendar and contact export via iCal and vCard files is described step by step. Getting out is thinner: the terms make the user responsible for downloading their data before the contract ends, with a weekly backup duty, and we found no public information on an administrator exporting the whole organisation, on a named Exchange or Microsoft 365 source, or on an open-source or self-hosted edition.
Tuta Business
The documented way in is forwarding mail from a previous provider or importing contacts and calendars, while the roadmap still lists email import as a next development step — the captured pages give different pictures of where import stands. The way out is thin: the vendor states IMAP is not offered, calendar export is.ics, we found no public information on exporting a mailbox in standard formats, and the GPLv3 open-source licence covers client code, with no public information on a self-hosted server edition. At least the exit terms are written down: personal data deleted no later than thirty days after termination.
European sovereignty
mailbox.org Business
Heinlein Hosting GmbH of Berlin appears as operator and controller with register court and number, the servers are stated to stand exclusively in Berlin on the provider's own hardware, and a GDPR data processing agreement comes with Standard and Premium alongside ISO 27001 and BSI C5 — with spam filtering and support evidently in-house rather than farmed out. The captured pages give different names for the contracting entity, however (Heinlein Hosting in the imprint and privacy policy, Heinlein Support in the terms), we found no public information on a subprocessor list with locations, and one certification text describes hosting across Germany, the EU, EFTA and the EEA rather than Berlin alone.
Tuta Business
Tutao GmbH is registered at the Hanover district court with a German VAT number, states it owns its servers in ISO 27001-certified data centres in Germany, calls itself its own ISP with no US offices, and publishes a data processing agreement. The named subprocessors handle payment only — PayPal in Luxembourg and Braintree in the USA for credit-card data — and authority access runs through a German judge, with IP logging only after a court order. That is a genuinely European chain; the certification covers the data centres rather than the whole service, which keeps it one step from the top.
Pricing transparency
mailbox.org Business
All three plans carry public monthly prices — Light 1 €, Standard 4 €, Premium 12 € — with included mail and drive storage per plan, alias counts, per-gigabyte prices for extra mail and drive storage, the minimum term per plan, VAT rules for consumers and businesses, and a thirty-day trial. The unpriced corners remain: the reseller support packages Silber, Gold and Platin and the user support plans are named without prices, and we found no public information on minimum seats or a monthly-versus-annual comparison.
Tuta Business
Three business tiers sit on the public page at €6, €8 and €12 per user per month paid yearly, each with storage, extra addresses, custom-domain counts and support level stated, and the terms spell out contract periods, auto-renewal, payment methods, invoice payment for business customers and a 50,00 EUR blocking fee. But the Save €19.20 banners imply a monthly price the pages never state, whitelabel, the SMTP relay and further domains carry no public price, and the business tiers are marked Excludes taxes while private tiers say Includes taxes. A buyer can budget roughly but cannot compute the year from the public pages alone.
Sovereignty, side by side
Dimension
mailbox.org Business
Tuta Business
Legal entity
Not determined
Not determined
Hosting location
Not determined
Not determined
Hosting options
Not determined
Not determined
Open source
Not determined
Not determined
Data processing agreement
Not determined
Not determined
Transfer impact assessment
Not determined
Not determined
Facts, side by side
Only facts both products carry under the same definition — anything else would not be a fair row.
Questions about mailbox.org Business and Tuta Business
Which is better, mailbox.org Business or Tuta Business?
As of 6 Nov 2026, the panel rates both 3/5. Weighted by what each judge cares about, 5 of the 6 judges pick mailbox.org Business and 1 picks Tuta Business. Which one fits depends on the criteria that matter to you; the table on this page shows both side by side, and each judge’s reading has its own page. Both were scored by the same AI bench under the same rubric, from public evidence only, as the methodology describes.
Is mailbox.org Business or Tuta Business European?
mailbox.org Business is European (EU-Made). Tuta Business is European (EU-Made). Provenance is read from each company’s own legal pages: who builds it and who owns it.
Where do mailbox.org Business and Tuta Business store customer data?
Per the vendors’ own pages as captured — mailbox.org Business: Default not stated; pages mention Germany. Tuta Business: Default not stated; pages mention Germany.
Do mailbox.org Business and Tuta Business have a free plan?
As of 6 Nov 2026, Tuta Business’s own pages state a free plan; mailbox.org Business’s pages as captured do not. Each product page links the pricing page it was read from.