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 IT Service Provider
Runs a six-person IT service company in Austria that looks after mail for forty client firms, from a two-person architect's office to a hotel group. Spends Mondays on mails that landed in spam and phones that stopped syncing. Wants one partner console for every client, DKIM and DMARC set up without a ticket, migrations it can run itself, support that answers within the hour, and margins it can calculate before it quotes.
mailbox.org Business
This judge's pick
Tuta Business
Criterion by criterion
Mail, domains & deliverability
mailbox.org Business
Custom domains are documented down to the last DNS record — four DKIM CNAME keys, the SPF single-record rule, DMARC with report evaluation, DANE and MTA-STS, plus catch-all, IMAP/POP3/webmail and storage stated per plan — which is DKIM and DMARC I can set up without opening a ticket. We found no public information on Exchange ActiveSync or native Outlook MAPI, send and attachment limits, a quarantine I can review, shared mailboxes, or out-of-office and server-side rules, and that is what my Outlook shops ask about first.
Tuta Business
Domain set-up is documented properly (TXT, MX, SPF, DKIM, MTA-STS and a recommended DMARC record with a status check), catch-all and unlimited custom-domain aliases exist, and the spam filter and regex inbox rules are real. But the vendor itself states "We do not offer IMAP", so no Outlook, no ActiveSync, and every client lives in Tuta's own apps; send limits (100 mails per hour) and attachment sizes are stated, and we found no public information on distribution lists, out-of-office replies or an admin-viewable quarantine.
Calendar, contacts & office apps
mailbox.org Business
Calendar, address book and tasks, browser editing of documents, spreadsheets and presentations in common Office formats, drive with real-time co-editing and password-protected shares, and video meetings all sit in one bundle, with CalDAV and CardDAV documented including Outlook via CalDAV Synchronizer and DAVx5 on Android. We found no public information on free/busy lookup, room and resource booking, delegated calendar access or a company-wide address book.
Tuta Business
Shared calendars with read-only, read-write and manage-sharing permissions, iCal invites,.ics import and export, multiple calendars, contacts sync to phones, and apps on Windows, macOS, Linux, Android and iOS are all documented. We found no public information on free/busy lookup, room or resource booking, a company-wide directory, or any office documents — the bundled Drive is file storage in closed beta with no editing described, and no video meetings or chat appear anywhere.
Security, encryption & compliance archiving
mailbox.org Business
PGP and S/MIME end-to-end in the webmailer, optional re-encryption of stored mail with the customer's own key with no provider-held second key, two-factor everywhere, a transparency report with real rejection figures for 2023 to 2025, and ISO 27001 plus BSI C5 stated. We found no public information on GoBD-compliant archiving, retention policies and legal hold, eDiscovery or admin-enforced two-factor, and the certification scope and auditor are not published — the archive gap alone rules it out for my hotel group.
Tuta Business
This is the strongest flank: end-to-end encryption of mail, calendars and contacts (AES 256, quantum-safe Kyber-1024), zero-access stated in the vendor's own words, TLS, admin-enforced two-factor with U2F and TOTP, phishing signatures, a SySS penetration test with a named auditor, GPLv3 client code and ISO 27001 data centres in Germany. Below that it thins out: a one-line GoBD claim with no archiving product, retention policies, legal hold or eDiscovery described, no transparency report, and the captured pages give different figures for backups — the business page advertises automatic backups while the terms place backup responsibility on the customer.
Administration, identity & partner management
mailbox.org Business
There is a genuine partner story: a reseller web console where I create, modify and delete customer accounts, cap mailboxes and mailing lists per tariff, search my customer base, export invoices in PDF and CSV, keep billing with myself, and hand support to paid Silber, Gold or Platin tiers — backed by a business admin console with API, CSV account creation and SSO. We found no public information on directory sync, SCIM provisioning, mobile device policies with remote wipe, audit logs or granular admin roles, and typical response times of 24 to 48 hours reach around-the-clock only in the platinum package.
Tuta Business
There is a genuine console — user management, multiple admin roles, sign-in-as-user, centralized billing, whitelabel, and admins who can enforce two-factor and reset employee passwords — enough for a small client. For a provider running many customers it stops there: we found no public information on a provisioning API, single sign-on or directory sync, admin audit logs, device policies with remote wipe, or reseller and partner accounts, and support is email or priority email with no response times stated.
Migration, open standards & exit
mailbox.org Business
The Audriga migration assistant in the settings menu pulls mail, calendars, contacts and files from a named list of IMAP and POP3 providers, calendar export and iCal import are documented, and the terms state 30-day deletion after contract end with download the user's responsibility — so I can run a move myself. We found no public information on a documented Exchange or Microsoft 365 path, organisation-wide export by an administrator, or free/busy coexistence during the move.
Tuta Business
Getting in is documented as forwarding from Gmail, Outlook, GMX and others plus contact and calendar import, and getting out is honest — personal data deleted no later than 30 days after contract end, self-service termination, and all clients published under GPLv3.
European sovereignty
mailbox.org Business
Heinlein Hosting GmbH of Berlin runs it on its own Berlin servers under German law, with green power, a GDPR data processing agreement in the Standard and Premium tariffs, and a published authority-request report — exactly the chain my Austrian clients want to see. The edges are thin: there is no subprocessor list with locations (Audriga appears only in the migration help), no certification scope published, and the captured pages name Heinlein Support GmbH as provider of the prepaid terms alongside the Berlin operator.
Tuta Business
Tutao GmbH in Hanover is the registered contracting entity, mail, calendars and files sit on the vendor's own servers in ISO 27001 certified data centres in Germany, a data processing agreement is published, and the privacy statement names its subprocessors with locations — Braintree in the USA for credit-card payments (disclosed as a third-country transfer), PayPal in Luxembourg, support staff in Hanover. The chain is about as European as a hosted service gets; it stays below the top because card payments can route through a US processor and the certification is stated for the data centres without a published report.
Pricing transparency
mailbox.org Business
All three tiers are public — Light 1 €, Standard 4 € and Premium 12 € pro Monat — with mail and drive storage per plan, aliases counted, and add-ons priced at 0,20 €/0,10 € je 1 GB mail storage and 0,40 €/0,20 € je 5 GB drive storage, so I can cost a client before quoting; terms are yearly on Light, monthly on Standard and Premium, with a 30-day trial and one-month cancellation. The Silber, Gold and Platin support packages carry no public prices, we found no public information on a monthly-versus-annual comparison or minimum user counts, and the captured pages give different figures for VAT — the pricing page includes it depending on the user's country while the business terms state prices exclude it.
Tuta Business
The three business tiers are public with per-user prices (€6, €8 and €12 per user per month, paid yearly, excluding taxes), and each tier's storage, custom-domain count, extra addresses and support level sit side by side, with contract terms (monthly or yearly, then cancellable anytime) and payment options including invoice for business customers. Gaps remain before I could quote a client blind: we found no public information on monthly billing prices for business plans, extra-storage add-ons or minimum users, and the "Save €19.20" figures appear without the comparison base, so any introductory saving is not separable from the regular price.
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.