Reviewed by the NexaToolkit team · Last reviewed June 2026. Proton’s privacy claims are backed by open-source code and zero-access encryption — a genuine differentiator we don’t overstate. NexaToolkit may earn a commission from links on this page — it never changes what we recommend.
If you don’t want your email, files, and AI chats mined for ads or model training, the mainstream productivity suites are the wrong home. Proton has built a privacy-first workspace — encrypted mail, drive, calendar, and now an AI assistant — that’s a real alternative. Here’s how to set it up, what it costs, and where its limits are, with real 2026 pricing.
Step 1: the Proton Unlimited bundle
Proton Unlimited is €12.99/month (€9.99/month billed annually) and bundles the Plus versions of Proton Mail, Calendar, Drive, Pass, VPN, and Wallet — plus access to the free tier of Proton’s AI, Lumo. A free Proton tier exists if you want to test the basics first.
Step 2: add Lumo, the private AI assistant
Lumo is Proton’s privacy-first AI: zero-access encryption means saved chats decrypt only on your device, conversations aren’t used to train models, and the code is open source. Free with guest mode or a Proton account; Lumo Plus is $12.99/month for higher limits (included in Proton Visionary).
Step 3: migrate the essentials
Move email and calendar with Proton’s import tools, store sensitive files in Drive, and use Pass for credentials. The win is one encrypted ecosystem instead of scattering data across ad-funded services.
The honest limits
Proton trades some convenience for privacy: no deep third-party app ecosystem like Google Workspace, fewer real-time collaboration features, and Lumo is less powerful than frontier models like Claude or ChatGPT ($20). Privacy-first means accepting those trade-offs deliberately.
Privacy workspace options compared
| Tool | Price | Best for |
|---|---|---|
| Proton Unlimited | €9.99–12.99/mo | Full encrypted suite + free Lumo |
| Lumo Plus | $12.99/mo | Private AI with higher limits |
| Google Workspace | From ~$7/user | Convenience, not privacy |
| Claude / ChatGPT | $20 | More capable AI (less private) |
A real scenario
A consultant handling sensitive client data who refuses to keep it in ad-funded clouds: Proton Unlimited (€9.99/mo annual) gives them encrypted mail, an encrypted Drive for client files, Pass for credentials, and VPN — one ecosystem where Proton itself can’t read the contents. They use Lumo for AI tasks involving confidential material because the chats stay private. For heavy-duty reasoning they’ll still reach for Claude ($20), accepting it’s less private — a deliberate split: private workspace by default, frontier AI only for non-sensitive work. That trade-off, made consciously, is the whole point.
Frequently asked questions
How much does Proton Unlimited cost?
€12.99/month, or €9.99/month billed annually. It bundles Plus versions of Proton Mail, Calendar, Drive, Pass, VPN, and Wallet, plus access to the free tier of Lumo, Proton’s AI assistant.
Is Proton Lumo actually private?
Yes, by design — zero-access encryption means saved chats decrypt only on your device, conversations aren’t used for model training, and the code is open source so the claims are verifiable. Lumo Plus ($12.99/mo) adds higher usage limits.
What are Proton’s downsides?
Fewer third-party integrations and real-time collaboration features than Google Workspace, and Lumo is less capable than frontier models like ChatGPT or Claude. It’s a deliberate privacy-for-convenience trade.
More: see our AI tools for remote teams and AI productivity tools.
