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Arco icon

Arco

Arco is a native Mac app for chatting with multiple AI models at once and comparing their answers side by side.

Ask once, reach every AI model. All staying private

Cost / License

  • Freemium
  • Proprietary

Application type

Platforms

  • Mac
Compare multiple AI models side by side (light-mode)
Summarize responses from multiple AI models to extract insights
+1
Compare multiple AI models side by side (dark-mode)
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Features

Properties

  1.  Privacy focused
  2.  AI-Powered

Features

  1.  AI Chatbot

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Arco information

  • Developed by

    Arco

  • Licensing

    Proprietary and Freemium product.

  • Pricing

    free version with limited functionality.

  • Alternatives

    10 alternatives listed

  • Badge

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  • Supported Languages

    • English

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Official Links

What is Arco?

Arco is a native Mac app for chatting with multiple AI models at once and comparing their answers side by side.

Ask one prompt, see every model's response in the same window, and use Summarize to pick a judge model that compares all replies and highlights the strongest answer. No more juggling ChatGPT, Claude, and Gemini in separate tabs.

Bring your own OpenRouter API key and get access to 400+ models with one connection. You pay OpenRouter directly for tokens used, with no markup from Arco and no monthly subscription. If a new model drops, you can add it instantly by pasting its model ID instead of waiting for a platform to support it.

Everything stays on your Mac. Conversations are stored locally on your device, not on Arco's servers, so your prompts and answers never leave your machine.

Key features:

  • Choose from 400+ AI models via OpenRouter (BYOK)
  • Side-by-side comparison with multiple layout options
  • Summarize: a judge model compares all replies and returns a structured breakdown
  • Local-first storage. Chats stay on your Mac
  • No monthly subscription. Pay only for the tokens you actually use
  • Add any new OpenRouter model instantly by ID
  • Native Mac app built for macOS 13+ on Apple Silicon

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