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: July 2026
1. ReefOfficeOur pick for running a business
A managed business back-office on a dedicated server you own: Nextcloud, Dolibarr, Paperless-ngx, automation, private local AI and Hermes.
Best for: Freelancers, agencies and teams who need to run a business, not just email, on infrastructure they own.
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 to run a business with CRM, invoicing, documents, automation and AI on infrastructure you own? 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 Core Team is EUR89/mo flat for unlimited users (fair use) 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 gives you a dedicated encrypted server, 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? +
Both. ReefOffice includes private AI chat and Hermes, an autonomous AI agent with persistent memory that can act across approved workflows.
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? +
On AI plans, locally on your own GPU. On Office plans, you can connect your own AI provider key. Your documents are never used to train anyone else’s model.
A private workspace you actually own
ReefOffice runs your whole business on a dedicated EU server: files, CRM, invoicing, documents, automation, local AI and an AI agent. Open-source, flat price, no lock-in.