You re probably overpaying for everything you buy online. Not because you re careless, but because it s impossible to check every site. The same product can vary 10 30% across retailers. The internet made shopping convenient. It never made it optimal. That s why I built Rectangle. An AI shopping agent and researcher for tech & electronics: - Ask anything about a product. - Compare across hundreds of retailers. - Add everything to one cart and check out once. - Automatically track your warranties No tab hopping. No guesswork. No multiple carts. No multiple checkouts. Its live and I'd love for you to try it out for funzies or try buying a couple things you want. Any feedback is deeply appreciated, even if you hate the guts of it.
Rectangle is the first place where you can shop at multiple retailers like Amazon, Best Buy, Newegg, Walmart, and more. No switching tabs or losing track. We add AI on top: chat to find products, get recommendations, and use our Builder Studio to spec a full PC (CPU, GPU, RAM, etc.) with a budget and purpose in mind. Pick parts from live search results, add them to your build, and checkout once. One cart, one checkout. You decide, we execute.
Rectangle - Single Checkout for the WebYour AI-powered shopping agent. You decide, we execute.Feb 2026
