Business Email & Office Suites · Alternatives
Proton for Business alternatives
As of 6 Nov 2026, the panel rates grommunio (3.5/5), Infomaniak kSuite (3.5/5) and Nextcloud Hub (Groupware & Office) (3.5/5) 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 (EU-Made). Ratings are the AI panel’s opinion, formed from public evidence: how scores are made.
Proton for Business’s own page → All Business Email & Office Suites products →
European alternatives to Proton for Business
European by provenance (EU-made, EU origin with foreign ownership, or UK and wider Europe). Data hosting is stated only where the vendor’s own pages prove it.
-
grommunio
EU-MadePanel rating
grommunio, an open-source Exchange replacement from grommunio GmbH of Vienna, scores between 5 and 8 across the seven criteria.
- Data hosting: not stated on the vendor’s pages
- Free plan: yes, per the vendor’s page captured 5 Nov 2026
-
Infomaniak kSuite
UK / wider EuropePanel rating
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.
- Data hosting: Default not stated; pages mention Switzerland
- Free plan: yes, per the vendor’s page captured 5 Nov 2026
-
Panel rating
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.
- Data hosting: not stated on the vendor’s pages
-
ONLYOFFICE Workspace
EU-MadePanel rating
ONLYOFFICE Workspace, from Ascensio System SIA of Riga, reads as a document suite first and a mail platform second.
- Data hosting: not stated on the vendor’s pages
-
IONOS E-Mail & Office
EU-MadePanel rating
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.
- Data hosting: Default not stated; pages mention Germany
-
mailbox.org Business
EU-MadePanel rating
mailbox.org Business, operated by Heinlein Hosting GmbH, bundles mail (webmail, IMAP, POP3), calendar, contacts, browser office editing, drive and video meetings, with servers stated to stand exclusively in Berlin.
- Data hosting: Default not stated; pages mention Germany
-
Tuta Business
EU-MadePanel rating
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".
- Data hosting: Default not stated; pages mention Germany
- Free plan: yes, per the vendor’s page captured 5 Nov 2026
-
Runbox
UK / wider EuropePanel rating
Runbox is email hosting from Runbox Solutions AS of Oslo, and the bench's scores are sharply two-sided.
- Data hosting: Default not stated; pages mention Norway
-
Hostpoint E-Mail & Cloud Office
UK / wider EuropePanel rating
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.
- Data hosting: not stated on the vendor’s pages
-
STRATO Mail
EU-MadePanel rating
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.
- Data hosting: not stated on the vendor’s pages
- Free plan: yes, per the vendor’s page captured 5 Nov 2026
Other alternatives
-
Microsoft 365 Business
Rest of worldPanel rating
Microsoft 365 Business is a hosted Exchange Online suite bundled with Word, Excel, PowerPoint, Outlook, Teams and 1 TB of OneDrive per user.
Microsoft 365 Business in detail → Proton for Business vs Microsoft 365 Business →
-
Zoho Workplace
Rest of worldPanel rating
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.
- Free plan: yes, per the vendor’s page captured 5 Nov 2026
-
Google Workspace
Rest of worldPanel rating
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
Rest of worldPanel rating
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.