Lumo

Key facts, partly checked

Price

Free, then from €12.99 / month

Lumo Plus: €12.99 a month billed monthly, €9.99 a month billed annually (€119.88 a year). Business plan: Lumo Professional at €14.99 per user per month billed monthly, €11.99 billed annually. The page states: “Taxes may apply”.

Where your data is hosted Hosting to be checked

Swiss vendor. The official pages say “Designed and based in Europe” and mention servers controlled by Proton, without stating which country the servers are in. Proton’s data processing agreement limits transfers, as far as possible, to Switzerland, the EU and countries recognised as offering adequate data protection.

Your data and AI training No training on your data

Lumo does not use conversations to train models and does not keep logs of them. Exception: if you choose to send feedback, an anonymised version may be used to improve a model. The same rule applies to the free and paid plans.

Data processing agreement (GDPR contract) Data processing agreement available

Proton’s data processing agreement (DPA) applies to any business or organisation using its services and is part of its general terms. Lumo is not mentioned in it by name.

Language

Interface in French

Last checked

8 October 2026, partly checked

Get started in 10 minutes

1. Open Lumo from proton.me/lumo and create a free Proton account.
2. Try a simple request, for example rewording a customer email.
3. For a team, compare the Lumo Professional plan with the free plan before rolling it out to everyone.

Rewrite this invoice reminder email in a polite but firm tone, in under 120 words. Restate the invoice number and the due date. Offer a phone call if needed.

Replace the parts in square brackets. Do not paste any personal data without a data processing agreement.