ChatGPT AlternativesOnly Open Source apps categorised as AI Writing Tools

The best open source AI Writing alternative to ChatGPT is DeepSeek. If that doesn't suit you, our users have ranked more than 100 alternatives to ChatGPT and many of them are open source AI Writing Tools so hopefully you can find a suitable replacement. Other interesting open source AI Writing Tool alternatives to ChatGPT are Lumo by Proton, Qwen, AnythingLLM and Alpaca - Ollama Client.

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ChatGPT alternatives are mainly AI Writing Tools, but if you're looking for AI Chatbots or Large Language Model (LLM) Tools you can filter on that. Other popular filters include Free, Open Source, Online + Free, Android + Free, Android, Grammar Check and Text Editors. You can also filter by region, for example EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to ChatGPT.
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Alternatives list

  1. DeepSeek icon
     152 likes

    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...

    225 DeepSeek alternatives

    Cost / License

    • Freemium
    • Open Source (MIT)

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
     
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    4
  2. Lumo by Proton icon
     132 likes

    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.

    143 Lumo by Proton alternatives

    Cost / License

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
     
  3. Qwen icon
     57 likes

    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.

    146 Qwen alternatives

    Cost / License

    Platforms

    • Mac
    • Windows
    • Online
    • Self-Hosted
    • Android
     
  4. AnythingLLM icon
     59 likes

    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.

    234 AnythingLLM alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Mac
    • Windows
    • Linux
    • Self-Hosted
    • Docker
     
  5. 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.

    193 Alpaca - Ollama Client alternatives

    Cost / License

    Platforms

    • Linux
    • Flathub
    • Flatpak
    • Linux Mobile
     
  6. Euria icon
     24 likes

    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.

    Cost / License

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Software as a Service (SaaS)
     
  7. Ollama App icon
     31 likes

    A modern and easy-to-use client for Ollama.

    158 Ollama App alternatives

    Cost / License

    Alerts

    • Discontinued

    Platforms

    • Windows
    • Linux
    • Android
    • F-Droid
     
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    1
  8. Apertus icon
     28 likes

    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.

    108 Apertus alternatives

    Cost / License

    Platforms

    • Online
    • Self-Hosted
     
  9. Meta Llama icon
     37 likes

    As part of Meta’s commitment to open science, today we are publicly releasing Llama (Large Language Model Meta AI), a state-of-the-art foundational large language model designed to help researchers advance their work in this subfield of AI.

    268 Meta Llama alternatives

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted
     
  10. Google Gemma icon
     30 likes

    A family of lightweight, state-of-the art open models built from the same research and technology that we used to create the Gemini models.

    Cost / License

    Platforms

    • Windows
     
  11. Khoj icon
     44 likes

    Open-source app offers local or cloud AI chat with major LLMs, advanced semantic search, automation, personal newsletters, document indexing, image generation, and text-to-speech. Access from web, Obsidian, Emacs, desktop, mobile, or messaging platforms.

    Cost / License

    Platforms

    • Mac
    • Windows
    • Linux
    • Self-Hosted
    • Python
    • Homebrew
    • Docker
     
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    1
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