Lumo (Proton) Prices, limits and access
Private AI chat by Proton, per the vendor with no logs and no training on chats.
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At a Glance
Lumo (Proton) is an AI tool for Assistants & workspaces (category: Productivity). Free access: Free plan. Documented: 2 plans with prices and limits.
- Category
- Assistants & workspaces
- Paid from
- $9.99 per month billed annually ($12.99 monthly) / Monat (Plus)
- Free Option
- Free plan
- Plans
- 2
- Sources
- 3 verified sources
Category: Productivity · Assistants & workspaces
Features
Lumo is the AI assistant by Proton AG in Geneva. Per the vendor, open-source language models run on servers Proton controls, and chats are neither logged nor used for training.
Free costs nothing with limited usage. Per the pricing page, Plus costs $12.99 monthly or $9.99 per month billed yearly and adds more messages, more image generation and unlimited projects.
- Per the vendor no logs of conversations
- Per the vendor no training on chats
- Per the vendor open-source models on servers Proton controls
Prices and plans
US dollar prices only
| Tier | Price | Period | What you get |
|---|---|---|---|
| Free | freeBilling period: monthly | Monat | Limited Max model usage Limited messages and chat history Limited image generations 1 project |
| Plus | $9.99 per month billed annually ($12.99 monthly)Billing period: monthly | Monat | More Max model usage More messages and chat history More image generations Unlimited projects Unlimited custom Lumos 30-day money-back guarantee |
Prices as stated by the provider, usually plus statutory VAT. The final price depends on your country and is shown by the provider.
Prices last checked: 2026-10-30
Data & privacy
Data handling per the vendor, by plan. General information based on vendor statements, not legal advice. Whether your use is permitted depends on the purpose and the data you process.
| Plans | Data handling per the vendor | Details |
|---|---|---|
| Free, Plus | Not established Not established for personal data | Storage location: not established DPA: not established Training on inputs: no |
Per the vendor, the models run on servers Proton controls; based in Switzerland (not an EU member). Storage location and DPA for these plans not sourced.
Sources (vendor pages): proton.me (checked on 2026-10-30)
More information per the vendor
| Topic | Per the vendor |
|---|---|
| Sub-processors | No vendor information found (checked on 2026-10-31) |
| Transfers outside the EU | Per the vendor: adequacy decision, standard contractual clauses proton.me (checked on 2026-10-31) |
| Retention | Per the vendor: Once the query has been processed and the response generated, the data is erased. proton.me (checked on 2026-10-31) |
| Audits and certificates the vendor names | No vendor information found (checked on 2026-10-31) |
| Professional secrecy (Section 203 German Criminal Code) | No vendor information found (checked on 2026-10-31) |
How we check vendor data statements
Independent price alert from AI Compare Ninja
How we compare
We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.
Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first; neither is a quality ranking. The vendor page always wins.
Edited and checked by the AI Compare Ninja team
Sources
All details regarding plans, limits, and features are based on official vendor documentation and the primary sources verified below.
- lumo.proton.me/about
- proton.me/support/lumo-privacy
- proton.me/legal/terms
FAQ
Is Lumo (Proton) available for free?
Yes. A permanently free plan is published, not a time-limited trial.
Where is the vendor of Lumo (Proton) based?
Proton AG is based in Switzerland. Regardless of that location, data processing and privacy terms are governed by the vendor's own contract.
How is Lumo (Proton) billed?
Per the pricing page: Plus $12.99 monthly or $9.99 per month billed yearly ($119.88 every 12 months). The page offers CHF, EUR and USD; the USD view was checked. Business plans not checked.
What is “Proton AG” on my bank or card statement?
According to our catalog data, Proton AG is the company behind Lumo (Proton), so a charge under this name may come from a subscription or purchase at Lumo (Proton). The exact wording on a bank or card statement is set by the vendor and its payment provider; it can differ and is not recorded here. The invoices in your Lumo (Proton) account help to match the charge; for an unknown charge, contact your bank.
What plans does Lumo (Proton) offer?
The catalog documents 2 plans with price, billing period, and included features.
Is Lumo (Proton) currently available?
Lumo (Proton) is active.
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Lumo (Proton) and related names are trademarks or identifiers of their respective owners (Proton AG). They are named solely for descriptive purposes in an independent comparison. AI Compare Ninja has no business relationship, partnership or affiliation with Proton AG.