Privacy-focused productivity tools maker Proton released its AI assistant, called Lumo, which keeps no logs of conversations, has end-to-end encryption for storing chats, and offers a ghost mode for conversations that disappear as soon as you close the window. Lumo doesn’t require you to have an account to use the chatbot and ask questions. You can upload files to have the chatbot answer questions about them, and if you have a Proton Drive account, you can connect it with Lumo to access files stored in the cloud. While the chatbot has access to the web, it might not find you the latest results if you use it to search. Lumo is based on open source models, and will only depend on them for research and development going forward without utilizing user data to train its models. Lumo relies on zero-access encryption, an encryption method that other Proton products also use, to let users store their conversation history, which can be decrypted on the device. “Lumo is based upon open-source language models and operates from Proton’s European datacenters. This gives you much greater transparency into the way Lumo works than any other major AI assistant. Unlike Apple Intelligence and others, Lumo is not a partnership with OpenAI or other American or Chinese AI companies, and your queries are never sent to any third parties,” Proton said.