The confidential AI chat assistant
AI should empower you, not exploit you for your data
Your chats are yours and yours alone
The questions you ask Lumo — about your work, your health, or your ideas — aren’t accessible to us. So they can never be used to target ads, shape what you see online, or build a personal profile that third parties could exploit.
What makes Lumo different
Our approach proves AI can benefit society without compromising your data. See how Lumo compares with other AI chat assistants.
 Lumo |  Gemini |  Copilot |  OpenAI |  Claude | |
|---|---|---|---|---|---|
Never uses your data to train AI | Yes | No | No | No | No |
Does not log your chats | Yes | No | No | No | No |
Can’t share your data with anyone | Yes | No | No | No | No |
Has an ad-free business model | Yes | No | No | No | Yes |
Based in a high-privacy jurisdiction | Yes | No | No | No | No |
Opens source code to the public | Yes | No | No | No | No |
What Lumo can help you do
Reclaim hours lost to time-consuming tasks and give them back to what truly matters: your loved ones, your passions, your peace of mind. Lumo empowers you with AI, while keeping your data strictly yours.
Get even more from Lumo
Upgrade to Lumo Plus to get unlimited chats and the fastest responses — and to support our mission to build an internet that empowers digital freedom.
Free
No credit card required
Limited Max model usage
Limited messages & chat history
Limited image generations
1 Project
Lumo AI Plus
30-day money-back guarantee
More Max model usage
More messages & chat history
More image generations
Unlimited Projects
Unlimited Custom Lumos
Trusted by our community
@recant731
on X
Just got Lumo to help plan out a road trip, with detailed routes and budgets for stays and my car on fuel. @ProtonPrivacy already had me stoked and now @asklumo has too.
@markruffalo
via Instagram comment
There are other chat apps you can use that are actually just as good, cheaper or more private that don’t fund evil in the world. Lumo from ProtonMail comes to mind
@banasnap.bsky.social
on Bluesky
Promising premise: a privacy-first AI is exactly what the current landscape was missing. With most services dominated by US and Chinese companies, having a European-based option, from a team already well-versed in online privacy, fills a much-needed gap. Looking forward to trying Lumo.
tintreack
on Reddit
This is pretty awesome, and the mascot is kind of adorable. I really love the branding of this. Also, as a visionary user who has to use ChatGPT for his workflow, thank you. I can finally get rid of that. I've been testing it out, it's pretty great! Nice job team.
Frequently asked questions
- What is the best AI chat assistant for privacy?
- Can I use Lumo as an AI chat without logging in or signing up?
- How does Lumo compare with other AI tools like ChatGPT?
- Is Lumo a safe and secure AI chat assistant?
- Which languages does Lumo understand?