Proton
A private alternative to ChatGPT
Encrypted chats that are never used to train models.
- Start free, no credit card
- Plus is $9.99/month billed yearly
- 30-day money-back on Plus
People type work worries, health questions and family matters into AI chat without a second thought. If you would rather those words never sit in a database tied to ads or training, Lumo is built for that.
Chats are stored with zero-access encryption and can only be decrypted on your own device. Not even Proton staff can open them.
On the official comparison table Lumo is marked yes for never training on your data, not logging chats and not sharing data with anyone. The code is open source, so anyone can verify those claims.
The service is run by Proton in Switzerland and follows the European GDPR, and you can delete your account at any time.
Switching costs little. Start on the free plan, and move to Plus when you need more usage.
Deals you can use now
| Deal | Code | Conditions |
|---|---|---|
| FreeStart on the free plan with no card | — | The free plan limits Max model usage, messages and chat history, and image generations, with 1 Project. |
See Proton Lumo in detailThe AI chat that keeps chats privateTurn a description into an image · Pick Lite or Max for the job · Pull insights from confidential data · Turn a messy to-do list into a planFAQ
Does it have web search like ChatGPT?
Yes. Built-in web search brings current information into answers, and your queries are not used for targeted ads.
Is my data really not used for training?
Proton states that Lumo never uses your data to train AI models.
Are there apps?
Yes, iOS and Android apps plus a web app.
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