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, Alpaca - Ollama Client, Qwen and Ollama App.

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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, Android + Free, Android, Grammar Check, EU 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

    DeepSeek

     101 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...

    147 DeepSeek alternatives

    Cost / License

    • Freemium
    • Open Source (MIT)

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    DeepSeek screenshot 1
     
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    4
    Comments about DeepSeek as an Alternative to ChatGPT
    Pilo-servusMariae
    3

    IA with Chinese Propaganda

    Redoodlev4
    Positive
    0

    for deeplevel reasoning,deepseek is better

    Boku Delorum
    Positive
    0

    Faster. Better answers for coding.

    Review by a new / low-activity user.
    3 of 4 comments
    DeepSeek icon
    DeepSeek icon
    • DeepSeek is Freemium and Open SourceChatGPT is Freemium and Proprietary
    • DeepSeek is LightweightChatGPT is not according to our users
  2. Lumo by Proton icon

    Lumo by Proton

     81 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.

    98 Lumo by Proton alternatives

    Cost / License

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    Lumo by Proton screenshot 1
     
  5. Ad
  7. Ollama App icon

    Ollama App

     25 likes

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

    Cost / License

    Application types

    Platforms

    • Windows
    • Linux
    • Android
    • F-Droid
    Ollama App screenshot 1
     
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    1
    Comments about Ollama App as an Alternative to ChatGPT
    Alternative Software
    Positive
    0

    While not a direct alternative to ChatGPT (it’s just a client for Ollama), it is my preferred GUI to use Ollama.

    Ollama App icon
    Ollama App icon
    • Ollama App is Free and Open SourceChatGPT is Freemium and Proprietary
    • Ollama App is Privacy focusedChatGPT is not according to our users
  8. Meta Llama icon

    Meta Llama

     35 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.

    239 Meta Llama alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted
    Meta Llama screenshot 1
     
  10. Apertus icon

    Apertus

     22 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.

    72 Apertus alternatives

    Cost / License

    Application types

    Platforms

    • Online
    • Self-Hosted
    Apertus screenshot 1
     
  12. Khoj icon

    Khoj

     38 likes

    Khoj is an open-source AI second brain that learns from your notes (Obsidian, EMACS), documents, and has access to the internet. It can replace your search engine, help you with reading papers, and get you transparent, fast answers.

    176 Khoj alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    chat with an image, see references
     
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    1
    Comments about Khoj as an Alternative to ChatGPT
    maurosoft391
    Negative
    0

    it's too slow to answer a simple question and sometimes it's buggy.

    Khoj icon
    Khoj icon
    • Khoj is Freemium and Open SourceChatGPT is Freemium and Proprietary
    • Khoj is Privacy focusedChatGPT is not according to our users
  13. Euria icon

    Euria

     12 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.

    63 Euria alternatives

    Cost / License

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Software as a Service (SaaS)
    Euria screenshot 1
     
  14. Private GPT icon

    Private GPT

     32 likes

    Ask questions to your documents without an internet connection, using the power of LLMs. 100% private, no data leaves your execution environment at any point. You can ingest documents and ask questions without an internet connection!

    238 Private GPT alternatives

    Cost / License

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    Private GPT screenshot 1
     
  15. Maid (AI) icon

    Maid (AI)

     11 likes

    Maid is a cross-platform Flutter app for interfacing with GGUF / llama.cpp models locally, and with Ollama and OpenAI models remotely.

    Cost / License

    • Free
    • Open Source (MIT)

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • Android Tablet
    • F-Droid
    Maid (AI) screenshot 1
     
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