Compare -> The best Proton Workspace alternatives for business
The best Proton Workspace alternatives for business
Proton Workspace is a great encrypted, EU-based suite. But alternative means different things depending on what you need: encrypted email, a full office suite, or a place to actually run your business. Here are the honest options, who each is for, and where ReefOffice fits.
Last reviewed: August 2026
1. ReefOfficeOur pick for running a business
A managed business back office on a reserved EU VM: Nextcloud, Dolibarr, Paperless-ngx, automation, Open WebUI and Hermes.
Best for: Freelancers, agencies and teams who need a managed business environment, not just email and office tools.
2. Google Workspace / Microsoft 365
The Big-Tech incumbents. Deep features and polish, but US jurisdiction, proprietary formats and data-practice concerns.
Best for: Teams that prioritize feature depth and accept Big-Tech tradeoffs.
3. Tuta (Tutanota)
A German encrypted email and calendar provider. Privacy-first like Proton, but narrower in scope.
Best for: Individuals or teams who want encrypted EU email and little else.
4. Mailbox.org / Infomaniak kSuite
European productivity suites for mail, calendar, drive and office. More than email, less than a business back-office.
Best for: EU teams wanting hosted office tools without US Big Tech.
5. Self-hosted Nextcloud (DIY)
Run the open-source stack yourself. Maximum control, but you manage updates, backups and security.
Best for: Technical users who want to own everything and be their own sysadmin.
How to choose
- • Just need encrypted email and calendar? Stay with Proton, or look at Tuta / Mailbox.org.
- • Want a hosted office suite without US Big Tech? Proton, Infomaniak kSuite, or Mailbox.org.
- • Need CRM, invoicing, documents and automation in a managed environment reserved for your organisation? That is ReefOffice.
- • Happy to be your own sysadmin? Self-host Nextcloud yourself or use Cloudron.
Frequently asked questions
Is ReefOffice more expensive than Proton Workspace? +
For a solo who only needs email and docs, Proton can be cheaper. ReefOffice Team is EUR119/mo flat for up to 10 named users and includes CRM, invoicing, document management and automation that Proton does not offer.
Is ReefOffice as secure as Proton? +
Different model, different guarantee. Proton has true end-to-end zero-access encryption for mail/drive/calendar. ReefOffice provides a reserved encrypted VM, a zero-access password vault, air-gap options, and business apps that need server-side access to work.
Does ReefOffice include an AI agent, or just chat? +
ReefOffice includes Open WebUI and Hermes. You can use your own compatible API key or add Managed AI as a separate subscription. Dedicated AI requires a design review. Hermes actions are governed and advanced modes are introduced progressively.
Can I keep using Proton Mail and still use ReefOffice? +
Yes. Many clients keep their existing email provider and run CRM, invoicing, documents, files, automation and private AI on ReefOffice.
What happens to my data if I want to leave ReefOffice? +
You export everything and can self-host the same open-source stack. There is no proprietary format to escape.
Do I need to be technical to run ReefOffice? +
No. ReefOffice is fully managed: no terminal, no server administration.
Where does ReefOffice run its AI? +
Managed EU AI uses approved European routes; Dedicated uses isolated GPU hardware managed for your workspace. Office plans can connect a supported provider API key. Local indexing keeps the full document corpus on your server.
A managed private business workspace
ReefOffice brings files, CRM, invoicing, document management and automation to a reserved EU VM. The stack is open source and exportable.