Arco is a native Mac app for chatting with and comparing AI models side by side, with access to 400+ models through OpenRouter. Bring your own key, pay providers directly with no markup, and keep every conversation local on your Mac. When a new model comes out, you can add it to Arco the same day. No monthly subscription. Free to download.
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Maker
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Hey! š
I'm Manoj. I built Arco because I got tired of opening ChatGPT, Claude, and Gemini in three tabs, pasting the same prompt three times, and trying to spot the differences myself while making a decision.
I also tried the other multi-model tools out there (ChatHub, Poe and ChatPlayground). The problem with all of them is the monthly subscription. I don't use this kind of tool every day, so paying a flat fee every month felt off.
The credit-based solutions drained fast.
So I made Arco work differently:
š Bring your own OpenRouter key. You pay them directly, and you get all 400+ models they support, including the ones that just came out this week.
š Your chats stay on your Mac. Only you can see them.
šø No monthly subscription. Free to download with everything included.
š Made for Mac. Apple Silicon, macOS 13+ required.
I'd love your feedback. What would make this more helpful for you? Especially curious to hear from anyone who's tried ChatHub, Poe, or ChatPlayground and felt like something was missing.