The best open source alternative to Claude is Lumo by Proton. If that doesn't suit you, our users have ranked more than 100 alternatives to Claude and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Claude are DeepSeek, HuggingChat, Qwen and Jan.ai.
Privacy-first AI assistant utilizing zero-access encryption and open-source code, ensuring no data logging, profiling, or training on chats, providing user-controlled, encrypted conversations, with compliance under GDPR and no sharing with third parties.
Switzerland
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...
China
A groundbreaking open-source alternative to ChatGPT, offering code writing, email drafting, and more tasks in a privacy-friendly, ad-free environment without requiring sign-up.
United States
The Qwen team is dedicated to pursuing artificial general intelligence (AGI) and is focused on building generalist models, including large language models and large multimodal models.
China
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.
Singapore
Private offline AI chat using local language models on mobile and desktop, no accounts or tracking, open source Rust core, privacy-first design, cross-platform availability, ideal for confidential conversations, with end-to-end encrypted sync coming soon.
United States
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.
United States
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.
Costa Rica
Confidential AI chat assistant delivering writing, summarization, voice transcription, email handling, and document search tools, all hosted exclusively in Switzerland with open source models, data sovereignty, and compliance with GDPR and FADP standards.
Switzerland
Mellum-4b-base is JetBrains' first open-source large language model (LLM) optimized for code-related tasks.
Czechia
EU
As a fully open language model, Apertus allows researchers, professionals and enthusiasts to build upon the model and adapt it to their specific needs, as well as to inspect any part of the training process.
Switzerland
An open-source platform for seamless automation in engineering tasks, providing local execution and control. Customizable with any LLM for enhanced autonomy, enabling developers to efficiently handle debugging to deployment tasks while preserving privacy.
United States
