# mailbox.org Business alternatives — Business Email & Office Suites

As of 6 Nov 2026, the panel rates [grommunio (3.5/5)](https://whats-best.ai/software/business-email/grommunio), [Infomaniak kSuite (3.5/5)](https://whats-best.ai/software/business-email/infomaniak-ksuite) and [Nextcloud Hub (Groupware & Office) (3.5/5)](https://whats-best.ai/software/business-email/nextcloud-hub) highest among the other 14 Business Email & Office Suites products evaluated. Ratings that look equal are rounded to half stars; the order uses the unrounded rating, then the name. The highest-rated European alternative is [grommunio](https://whats-best.ai/software/business-email/grommunio) (EU-Made). Ratings are the AI panel’s opinion, formed from public evidence: [how scores are made](https://whats-best.ai/methodology#ordering).

- Canonical page: https://whats-best.ai/software/business-email/mailbox-org/alternatives
- mailbox.org Business: https://whats-best.ai/software/business-email/mailbox-org.md
- Data as of: 2026-11-06

**AI-generated.** Ratings and verdicts are the opinion of a panel of AI judges, formed from public evidence against a published rubric — an analysis, not a hands-on test. Listed by panel rating (products the panel could not rate follow alphabetically); no placement is for sale. How lists are ordered: https://whats-best.ai/methodology#ordering

## European alternatives to mailbox.org Business

- [grommunio](https://whats-best.ai/software/business-email/grommunio) · EU-Made · panel rating 3.5/5 · data hosting: not stated on the vendor’s pages · free plan per the vendor’s page captured 2026-11-05
  grommunio, an open-source Exchange replacement from grommunio GmbH of Vienna, scores between 5 and 8 across the seven criteria.
- [Infomaniak kSuite](https://whats-best.ai/software/business-email/infomaniak-ksuite) · UK / wider Europe · panel rating 3.5/5 · data hosting: Default not stated; pages mention Switzerland · free plan per the vendor’s page captured 2026-11-05
  Infomaniak kSuite — mail, calendar, contacts, kDrive, kChat and kMeet from Infomaniak Network SA of Geneva — scores strongest on sovereignty at 7 to 8: own Swiss data centres, data stated never to leave the vendor's own infrastructure, employee-held capital guarded by a foundation, and support staff in Geneva and Zurich.
- [Nextcloud Hub (Groupware & Office)](https://whats-best.ai/software/business-email/nextcloud-hub) · EU-Made · panel rating 3.5/5 · data hosting: not stated on the vendor’s pages
  Nextcloud Hub is an open-source, self-hosted groupware and office suite from Nextcloud GmbH of Stuttgart (registered at AG München, HRB 227086), and the bench scores it highest where control matters: sovereignty at 8-9 and calendar and office at 7-8, with security and compliance at 7-8.
- [Proton for Business](https://whats-best.ai/software/business-email/proton-business) · UK / wider Europe · panel rating 3.5/5 · data hosting: not stated on the vendor’s pages
  Proton for Business is the end-to-end encrypted mail, calendar, documents and storage suite from Proton AG in Geneva.
- [ONLYOFFICE Workspace](https://whats-best.ai/software/business-email/onlyoffice-workspace) · EU-Made · panel rating 3/5 · data hosting: not stated on the vendor’s pages
  ONLYOFFICE Workspace, from Ascensio System SIA of Riga, reads as a document suite first and a mail platform second.
- [IONOS E-Mail & Office](https://whats-best.ai/software/business-email/ionos-email-office) · EU-Made · panel rating 3/5 · data hosting: Default not stated; pages mention Germany
  The bench reads IONOS E-Mail & Office as a German mail-and-office package, strong on hosting, archiving and stated prices, thin on administration and exit.
- [Tuta Business](https://whats-best.ai/software/business-email/tuta-business) · EU-Made · panel rating 3/5 · data hosting: Default not stated; pages mention Germany · free plan per the vendor’s page captured 2026-11-05 · [compare with mailbox.org Business](https://whats-best.ai/compare/mailbox-org-vs-tuta-business.md)
  Tuta Business from Tutao GmbH of Hanover is an end-to-end encrypted mail, calendar and file bundle on custom domains, with three public business tiers at €6, €8 and €12 per user per month paid yearly, each marked "Excludes taxes".
- [Runbox](https://whats-best.ai/software/business-email/runbox) · UK / wider Europe · panel rating 2.5/5 · data hosting: Default not stated; pages mention Norway
  Runbox is email hosting from Runbox Solutions AS of Oslo, and the bench's scores are sharply two-sided.
- [Hostpoint E-Mail & Cloud Office](https://whats-best.ai/software/business-email/hostpoint-email) · UK / wider Europe · panel rating 2.5/5 · data hosting: not stated on the vendor’s pages
  Hostpoint E-Mail & Cloud Office is a Swiss mail and office bundle, and the bench scores it highest where the pages are most open: pricing transparency sits at 6 with no spread, and calendar and office at 6 to 7.
- [STRATO Mail](https://whats-best.ai/software/business-email/strato-mail) · EU-Made · panel rating 2/5 · data hosting: not stated on the vendor’s pages · free plan per the vendor’s page captured 2026-11-05
  STRATO Mail is a hosted German business e-mail product — webmail on Open-Xchange, mailboxes on your own.de domain, up to 250 aliases, server-side spam and virus filtering — and the judges' persona-weighted totals cluster at 4.2–4.6.

## Other alternatives

- [Microsoft 365 Business](https://whats-best.ai/software/business-email/microsoft-365-business) · Rest of world · panel rating 3/5
  Microsoft 365 Business is a hosted Exchange Online suite bundled with Word, Excel, PowerPoint, Outlook, Teams and 1 TB of OneDrive per user.
- [Zoho Workplace](https://whats-best.ai/software/business-email/zoho-workplace) · Rest of world · panel rating 3/5 · free plan per the vendor’s page captured 2026-11-05
  Zoho Workplace, a business email and office suite from Zoho Corporation, is strongest on mail and deliverability and administration and identity, which both range 7 to 7: mailboxes on the customer's own domain with IMAP, POP, SMTP and ActiveSync, SPF, DKIM, DMARC and DNSBL checks with quarantine, and an admin console with role-based permissions, SAML single sign-on on every plan and a broad provisioning API.
- [Google Workspace](https://whats-best.ai/software/business-email/google-workspace) · Rest of world · panel rating 2.5/5
  Google Workspace is Google LLC's business email and office suite, and the bench scored it strongest where the bundle is thickest: calendar and office sits at 6 throughout (minimum 6, maximum 6), with Gmail, Meet, Chat, Calendar, Drive, Docs, Sheets and Slides on every plan and Office-file interoperability stated throughout, while pricing transparency clusters at 6-7 with euro prices published for all three business tiers.
- [Fastmail for Business](https://whats-best.ai/software/business-email/fastmail) · Rest of world · panel rating 2/5
  Fastmail for Business, from Fastmail Pty Ltd, Australia, earns its best scores on migration and portability, 5 to 6: a self-serve tool imports mail, contacts and calendars from IMAP, CardDAV or CalDAV sources, with everything reachable over JMAP, IMAP, POP, SMTP, CalDAV, CardDAV and WebDAV.

Ratings are out of 5 (the panel's mean, half steps).

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Cite as: whats-best.ai, "mailbox.org Business alternatives — Business Email & Office Suites", AI panel analysis, as of 2026-11-06. https://whats-best.ai/software/business-email/mailbox-org/alternatives