GitFounders6 Open Source Alternatives to ChatGPT
A list of 6 carefully selected open-source alternatives to ChatGPT.
The open-source alternatives are ranked based on our custom ranking system and score. This system takes into account various factors to determine the best alternatives.
If you’re looking for alternative features or workflows, here is a prepared detailed list of ChatGPT open-source alternatives — each with its own distinctive strengths and key features.
Khoj offers a powerful, self-hostable AI second brain designed to amplify your research and automation efforts. It empowers users with customized AI agents that extract answers from the web or personal documents, making it an indispensable tool for creators and researchers.
Key Features
- AI second brain for personalized support
- Self-hostable and fully customizable
- Integrates with commercial and open weight AI models
- Deep research across documents and the web
- Automated scheduling and event-based notifications
- Multimodal support including voice and visual outputs
- Transparent, explainable AI reasoning
Khoj is a dynamic AI-powered research copilot that leverages integration with various language models like GPT, Claude, Gemini, and more to deliver tailored answers and deep research. It features custom chat controls, multimodal capabilities, document understanding, voice chat, and automation tools to streamline repetitive tasks and provide timely notifications. Its customizable nature makes it suitable for individual users, teams, and enterprises.
Jan is an open source ChatGPT alternative that runs entirely offline on your computer, ensuring robust privacy and data security. It is designed to empower users with complete control over their AI interactions and customizable local deployment.
Key Features
- 100% offline operation for enhanced privacy
- Local model hub with support for popular LLMs like Llama3
- Seamless routing to cloud AI models when necessary
- One-click local API server setup
- Highly customizable with extendable features
- Completely open source with user-owned data
Jan delivers an offline AI chatting experience that mimics ChatGPT while eliminating privacy concerns. The tool supports local model execution with a comprehensive model hub for running popular LLMs, offers features like a one-click local API server, and can connect to cloud-based models when extra power is needed. Its highly customizable framework allows users to tailor the experience using extensions and third-party integrations.
LLMChat offers the most intuitive unified AI chat interface, connecting you seamlessly with a diverse range of AI models. Enjoy a feature-rich experience that empowers you to integrate custom API keys, personalize your interactions with plugins and memory, and even craft your own custom assistant.
Key Features
- Unified interface for multiple AI models
- Bring your own API keys and get started without sign-up
- Personalized experience with plugins and custom memory
- Custom assistant creation with specialized instructions
- Privacy-first design with secure local conversation storage
LLMChat centralizes access to multiple leading AI models including GPT-4, Anthropic, Ollama, Gemini, and Groq on a single platform. It lets you bring your own API keys to initiate chats without any sign-up, enhancing your conversation experience with plugins and personalized memory. Create custom assistants by providing specialized instructions and enjoy secure, locally stored conversations.
Leon is an open-source personal assistant that lives on your server, offering a flexible, modular approach to automating your digital life. It leverages AI technologies like NLP and integrates with various speech solutions to enhance user interaction.
Key Features
- Open-source under the MIT license for maximum freedom.
- Self-hosted for complete control over data and privacy.
- Modular design allows custom skill integration.
- Supports various AI technologies such as NLP, TTS, and STT.
- Integrates with popular cloud and offline solutions.
Leon acts as your virtual brain, executing commands and automating tasks based on your instructions. Its modular architecture lets you add custom skills and packages to tailor its capabilities, while built-in privacy controls ensure your data stays secure. The tool supports integrations with leading text-to-speech and speech-to-text platforms, providing extensive options for both online and offline use.
Fullmoon is a powerful tool that enables users to chat with private and local large language models. Designed to run fully offline and optimized for Apple Silicon, it brings a billion parameters into your pocket while maintaining privacy through its open source framework.
Key Features
- Fully offline operation for enhanced privacy
- Optimized for Apple Silicon and Metal 3
- Customizable interface with themes and fonts
- Supports multiple platforms: iOS, iPadOS, macOS, visionOS
- Open source framework ensuring transparency
Fullmoon allows you to interact with local large language models directly on your device across iOS, iPadOS, macOS, and visionOS. It runs offline without internet access and is optimized for Apple’s hardware using Metal 3 and Swift MLX. With a customizable interface including personalized themes, fonts, and system prompts, Fullmoon supports quick chats and integration with shortcuts. The app features several models such as Llama-3.2 and DeepSeek-R1 variations, ensuring a secure and efficient conversation experience.
Letta (formerly MemGPT) is a powerful framework for creating LLM services with built-in memory and stateful agents. It enables developers to build AI agents with infinite context and human-like memory, facilitating continuous learning and improvement over time.
Key Features
- Stateful agents with built-in, persistent memory
- Agent Development Environment (ADE) for real-time visualization and editing
- Infinite context support to avoid context window overflow
- Robust API and SDK integrations (Python, Node.js/TypeScript)
- Scalable deployment options with Docker and Kubernetes
Letta empowers users to design and deploy AI agents that maintain persistent memory and reasoning across sessions. The platform integrates an Agent Development Environment (ADE) offering a visual interface to iterate on prompts, tools, and model configurations in real time. With robust APIs, SDKs, and production-ready deployment options, Letta supports over 7,000 tools and ensures agents operate within optimized context windows to enhance performance.
Price comparison of ChatGPT open-source alternatives
| Tool | Tier 1 | Tier 2 | Tier 3 | Details |
|---|---|---|---|---|
 | $0 Humanist | $30 Futurist | $20 Team (> 4 people) | Learn more |
* Pricing shown is based on publicly available information and may not reflect current rates. Visit each tool's website for detailed pricing information and additional tiers.
About ChatGPT
Similar Alternatives
ChatGPT
A generative artificial intelligence chatbot developed by OpenAI and launched in 2022.