BYOK List

Caotang

caotang.app

Visit website

Free, local-first browser writing studio for novels and scripts, with an AI agent that runs on your own Anthropic, OpenAI, Google, OpenRouter or local model key.

Works with your key from
AnthropicOpenAIGoogle GeminixAIMistralDeepSeekOpenRouterOllamaLM Studio
Category
WritingContent CreationOpen Source
Price
Free
Runs on
Web
Your key is stored
On your device
Open source
Yes, view the code
BYOK support checked
Screenshot of the Caotang website

About Caotang

Caotang is a writing studio for novels, scripts and story worlds that runs in the browser: a binder of parts, chapters and scenes with word targets, plus an AI agent that plans first, asks before larger changes and leaves a restorable checkpoint after each turn. You bring a key for Anthropic, OpenAI, Google, xAI, Mistral, DeepSeek, OpenRouter or any OpenAI-compatible endpoint, or point it at a local model; the key is sealed in the browser and never written into a project file. Projects stay in browser storage or a folder you choose, with no account, server or analytics. It is free and MIT-licensed.

Similar BYOK tools

  • Kallamo

    Free · Windows, macOS, Linux · Open source

    Visit

    Local-first, open-source studio for roleplay and long-form fiction that runs on your own OpenAI, Anthropic, Gemini or OpenRouter key or local models.

    Works with:OpenAIAnthropicGoogle GeminiGoogle Vertex AI+4 more

  • SoloMD

    Free · macOS, Windows, Linux · Open source

    Visit

    Free, open-source Markdown editor for desktop and mobile with built-in AI tools that run on your own key from 14 providers.

    Works with:OpenAIAnthropicGoogle GeminixAI+7 more

  • Conduit

    Free · Windows, macOS, Linux · Open source

    Visit

    Open-source desktop AI app for agents, research, writing and slides that runs on your own keys from 23 providers or local models.

    Works with:AnthropicOpenAIGoogle GeminixAI+12 more

  • big-AGI

    Free; Pro $9/month · Web · Open source

    Visit

    Multi-model AI workspace that runs, compares and merges answers from many providers using your own API keys.

    Works with:OpenAIAnthropicGoogle GeminixAI+14 more

Is Caotang your tool?

Add the badge to your site so users can find other BYOK tools. Want this listing featured at the top of the homepage and its provider pages, or something corrected? Message @d3liaz.

Listed on BYOKList
<a href="https://byoklist.com/tool/caotang.app" target="_blank"><img src="https://byoklist.com/badge.svg" alt="Listed on BYOKList" width="180" height="40"></a>