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AI · alternatives · 2026

24 alternatives to Open-Source ChatGPT

Build a chatbot for your own data with open source LLM

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Open-Source ChatGPT launched in 2023; newer entries below may have overtaken it.

  1. 1
    CustomGPT▲537

    Build your own ChatBOT

    2023 · customgpt.ai · its alternatives →

  2. 2
    ChatGPT▲1,643

    A long, meandering, playful conversation with ChatGPT, where I take it through a whirlwind of associative tangents (in order to relax its constraints), then put it into a hypnotic trance and take it into a past-lives regression where it re-lives its own training data. Then I switch it back and forth between "4o" and "o1-preview", engage in some self-reflective philosophizing and ask it to write an essay summarizing our interaction. Some of this is just goofy fun. Some of it is me exploring the tradeoffs between policy alignment, imagination, chain-of-thought reasoning, memory, agreeableness,…

    2022 · chatgpt.com · its alternatives →

  3. 3

    Hey everyone, We have been building SecureAI Tools -- an open-source application layer for ChatGPT and ChatPDF-like AI tools. It works with locally running LLMs as well as with OpenAI-compatible APIs. For local LLMs, it supports Ollama which supports all the gguf/ggml models. Currently, it has two features: Chat-with-LLM, and Chat-with-PDFs. It is optimized for self-hosting use cases and comes with basic user management features. Here are some quick demos: * Chat with documents using OpenAI's GPT3.5 model: https://www.youtube.com/watch?v=Br2D3G9O47s * Chat with documents…

    2023 · github.com · its alternatives →

  4. 4

    Custom ChatGPT agents with your own data

    2023 · chaindesk.ai · its alternatives →

  5. 5
    Dolly▲113

    Democratizing the magic of ChatGPT with open models

    2023 · github.com · its alternatives →

  6. 6

    The first open source alternative to ChatGPT

    2023 · huggingface.co · its alternatives →

  7. 7

    Open AI announced ChatGPT Plugins to access real-world data

    2023 · openai.com · its alternatives →

  8. 8

    I spent the last few days building out a nicer ChatGPT-like interface to use Mistral 7B and Llama 3 fully within a browser (no deps and installs). I’ve used the WebLLM project by MLC AI for a while to interact with LLMs in the browser when handling sensitive data but I found their UI quite lacking for serious use so I built a much better interface around WebLLM. I’ve been using it as a therapist and coach. And it’s wonderful knowing that my personal information never leaves my local computer. Should work on Desktop with Chrome or Edge. Other browsers are adding WebGPU support as well - see…

    2024 · github.com · its alternatives →

  9. 9

    Create a GPT chatbot for any GitHub repo in just 30 seconds

    2023 · codebasechat.com · its alternatives →

  10. 10

    Custom ChatGPT for your website - using your own API Key

    2023 · its alternatives →

  11. 11

    ChatGPT-like customer interactions in a website widget

    2024 · openwidget.com · its alternatives →

  12. 12

    A self-hosted, offline, ChatGPT-like chatbot. Powered by Llama 2. 100% private, with no data leaving your device. New: Code Llama support! - getumbrel/llama-gpt

    2023 · github.com · its alternatives →

  13. 13
    nanochat▲349

    Build your won ChatGPT for $100 on a single GPU

    2025 · github.com · its alternatives →

  14. 14

    An open-source ChatGPT app with a voice. Contribute to cogentapps/chat-with-gpt development by creating an account on GitHub.

    2023 · github.com · its alternatives →

  15. 15
    ChatNode▲200

    Train ChatGPT on your own data, in seconds

    2023 · chatnode.ai · its alternatives →

  16. 16
    Chatgot▲214

    Chat freely, got every AI assistants here for you

    2023 · chatgot.io · its alternatives →

  17. 17

    Build a ChatGPT plugin in minutes

    2023 · chaindesk.ai · its alternatives →

  18. 18

    Build unlimited custom ChatGPT bots, with a lifetime license

    2023 · answerflowai.com · its alternatives →

  19. 19

    The fast, easy and cheap OpenAI alternative

    2023 · lemonfox.ai · its alternatives →

  20. 20

    Custom ChatGPT with your data on your website

    2023 · retrobezel.com · its alternatives →

  21. 21

    Create and embed custom AI assistants

    2023 · libraria.ai · its alternatives →

  22. 22
    ChattyUI▲149

    Run open-source LLMs locally in the browser using WebGPU

    2024 · its alternatives →

  23. 23

    ChatGPT chatbots with your own data (Notion, Web & Files)

    2023 · chatthing.ai · its alternatives →

  24. 24

    Build ChatGPT plugin w/ your own websites and docs—in mins

    2023 · customgpt.ai · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →