Zero-access encrypted chat from the makers of Proton Mail/VPN — no account needed to start chatting
Proton Lumo is listed under General Purpose Chatbots, in the AI Chat & Assistants category on Flocci AI Tools. Zero-access encrypted chat from the makers of Proton Mail/VPN — no account needed to start chatting. It is freemium — a usable free tier with paid plans above it, and it lives at lumo.proton.me.
Proton Lumo is freemium: there is a free tier you can work in and paid plans above it. It is one of 391 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
Proton Lumo does 3 things the catalog singles out: Zero-access encrypted chat from the makers of proton mail/vpn — no account needed to start chatting; open-source client, no conversation logging or training on user data, by design; free tier includes web search and basic chat history, not just a stripped demo.
Alibaba Quark AI Assistant is the closest free alternative: it sits in the same General Purpose Chatbots sub-category and is free. Baichuan Bai Xiao Ying (百小应), Baidu Ernie Bot (Wenxin Yiyan) and Falcon LLM Chat (TII) also start free. The full list is on the alternatives page.
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