The best Large Language Model (LLM) alternative to Lumo by Proton is ChatGPT, which is free. If that doesn't suit you, our users have ranked more than 100 alternatives to Lumo by Proton and many of them are Large Language Model (LLM) Tools so hopefully you can find a suitable replacement. Other interesting Large Language Model (LLM) Tool alternatives to Lumo by Proton are DeepSeek, Mistral Le Chat, Google Gemini and DuckDuckGo AI Chat.
AI language model perfect for generating interactive human-like text in various styles. Built on architecture allowing real-time natural language generation, ideal for applications demanding fluent, relevant output over diverse topics broadened by extensive training data.
DeepSeek is a state-of-the-art AI assistant designed to provide intelligent, conversational support across diverse tasks. It leverages advanced natural language processing and machine learning to answer questions, generate creative content, solve complex problems, and offer...
Explore Mistral’s conversational tech with educational, fun interactivity. Customizable, unbiased models excel in performance benchmarks, supporting flexible deployment.
AI assistant offers writing, planning, learning support, generating images from text, and transforming text to speech. Utilizes large language models and syncs across devices without requiring coding skills. Supports dark mode and ad-free experience.
Duck.ai is a free feature that allows you to have private conversations with 3rd-party AI chat models, anonymized by us. It currently supports Anthropic’s Claude 3 Haiku, Meta’s Llama 4, Mistral AI’s Mistral Small 3, and OpenAI’s GPT-4o mini.
Cleaner; simpler; keeps offline history without a sign in. It's a tough contest with Duck winning out for user experience; but Proton winning out for privacy & sustainability (Proton's business model is distinctly freedom-privacy oriented; DuckDuckGo could suffer from drift)
But in Sep '25 usability is king - Duck.AI using Open Source models is good enough to get the job done.
Open-source offline AI platform supports local LLMs including Llama, Gemma, Qwen, GPT-oss, integrates cloud services like OpenAI and Anthropic, enables custom assistant creation, offers OpenAI-compatible API on localhost, operates across diverse hardware and ensures privacy.
Claude is a next-generation AI assistant based on Anthropic’s research into training helpful, honest, and harmless AI systems. Accessible through chat interface and API in our developer console, Claude is capable of a wide variety of conversational and text processing tasks...
Microsoft Copilot (previously know as Bing Chat) is a new Chatbot feature for Microsoft Bing which aim to revolutionize the search engine experience through AI-powered technology.
Open-source privacy-focused chatbot platform allowing unlimited document uploads, multi-user and single-user modes, AI-powered chat with documents, vector database and LLM compatibility, customizable interface, message history, secure desktop deployment, and full user controls.
Alpaca is an Ollama client where you can manage and chat with multiple models, Alpaca provides an easy and begginer friendly way of interacting with local AI.
Poe is a web-based AI platform that hosts multiple assistant bots—including Claude and various GPT and image/audio models—to provide conversational Q&A, image and audio generation, and automated AI workflows.
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They both have a similar goal, making a privacy respecting AI chat app, with the difference that DuckDuckGo offer multiple models.