The Best Open Source ChatGPT AlternativesTop AI Chatbots & Large Language Model (LLM) Tools like ChatGPT

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

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ChatGPT alternatives are mainly AI Chatbots, but if you're looking for Large Language Model (LLM) Tools or AI Writing Tools you can filter on that. Other popular filters include Free, Open Source, Android, Android + Free, Grammar Check, Text Editors and Android + Open Source. 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

     99 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...

    149 DeepSeek alternatives

    Cost / License

    • Freemium (Pay once or Subscription)
    • Open Source (MIT)

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    DeepSeek screenshot 1
     
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    4
    19
    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
    ChatGPT Icon
    DeepSeek icon

    • Almost everyone thinks DeepSeek is a great ChatGPT alternative.

    • DeepSeek is the most popular Open Source alternative to ChatGPT.

    • 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

     80 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

    • Freemium (Subscription)
    • Open Source (GPL-3.0)

    Application types

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    Lumo by Proton screenshot 1
     
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    11
  4. Jan.ai icon

    Jan.ai

     84 likes

    Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.

    181 Jan.ai alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Flathub
    • Flatpak
    • Online
    Jan.ai screenshot 1
     
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    1
    9
    Comments about Jan.ai as an Alternative to ChatGPT
    flintnpn
    Positive
    0

    Extremely easy to install, surprisingly lightweight private Chatbot that you can use either Locally or through the Web, better than trying to setup Ollama with a frontend like openwebui

    Review by a new / low-activity user.
    ChatGPT Icon
    Jan.ai icon

    • Almost everyone thinks Jan.ai is a great ChatGPT alternative.

    • Jan.ai is the most popular Linux alternative to ChatGPT.

    • Jan.ai is Free and Open SourceChatGPT is Freemium and Proprietary
    • Jan.ai is Privacy focused, Customizable and LightweightChatGPT is not according to our users
  5. Ad
    Screenshot
    Euria icon
    Euria

    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 wit...

    https://www.infomaniak.com
    Learn More
  6. Alpaca - Ollama Client icon

    Alpaca - Ollama Client

     30 likes

    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.

    140 Alpaca - Ollama Client alternatives

    Cost / License

    Application types

    Platforms

    • Linux
    • Flathub
    • Flatpak
    Chat with AI
     
  7. LibreChat icon

    LibreChat

     37 likes

    LibreChat is a free, open source AI chat platform. This Web UI offers vast customization, supporting numerous AI providers, services, and integrations. Serves all AI Conversations in one place with a familiar interface, innovative enhancements, for as many users as you need.

    111 LibreChat alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application types

    Platforms

    • Self-Hosted
    • Docker
    • npm
    LibreChat screenshot 1
     
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    1
    Comments about LibreChat as an Alternative to ChatGPT
    maurosoft391
    Negative
    2

    it's free and open-source, but it's too difficult to setup and install.

    ChatGPT Icon
    LibreChat icon

    • LibreChat is the most popular Self-Hosted alternative to ChatGPT.

    • LibreChat is Free and Open SourceChatGPT is Freemium and Proprietary
    • LibreChat is Privacy focusedChatGPT is not according to our users
  10. 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
    Ollama App screenshot 2
    Ollama App screenshot 3
     
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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.

    ChatGPT 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
  12. Meta Llama icon

    Meta Llama

     34 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.

    240 Meta Llama alternatives

    Cost / License

    • Free
    • Open Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted
    Meta Llama screenshot 1
     
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    7
  14. 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 of 80 ChatGPT alternatives