Plans to elevate your AI experience

Yes, Lumo is free to use and you can start chatting without even creating a Proton account. Lumo's free plan includes essential features that support your productivity, like basic chat history, web search, and the ability to upload individual small files — all while keeping your conversations private with zero-access encryption.

Lumo's Free plan offers essential features, but it comes with usage limitations on chats, favorites, uploads, images, and projects. Upgrading to Lumo Plus gives you more flexibility and advanced features while maintaining the same privacy guarantees. Upgrade to Plus to unlock unlimited chats, extended chat history, unlimited favorites and projects, plus the ability to upload multiple large files.

Yes. Lumo's Free plan has a cap on the number of chats you can send (what is the limitation?). Lumo Plus removes this limitation so that you can ask questions, refine ideas, and chat with Lumo without interruption.

Yes, Lumo for Business offers confidential AI for teams. It is available as a single solution, or as part of Proton Business Suite, a privacy-first suite of solutions including email, calendar, cloud storage, VPN, password manager, and video conferencing. Lumo for Business is great for tasks like drafting contracts, analyzing data, and brainstorming ideas while maintaining company and client confidentiality.

Your data stays yours and your chat history carries over seamlessly. Any conversations you've used with the Free version of Lumo will remain accessible and encrypted with zero-access encryption. The main difference is that with Plus, you'll gain extended history retention and the ability to save unlimited favorites and projects going forward.

Yes, you can upgrade, downgrade, or cancel your Lumo subscription at any time. If you downgrade from Plus to Free, you'll retain access to your saved chats, but you'll lose Plus features like unlimited chats and extended history once your current billing period ends. There are no long-term commitments or cancellation fees, so you're always in control of your subscription.