We're building Basement.
Sublevel is the company behind Basement, the browser whose job is shopping. It keeps every purchase you make anywhere on the web, gives you a personal shopper that knows what you already own, and lets it buy for you with a wallet you control.
Meet Basement
Basement
iOS · Chrome · Arc · Brave · SafariThe one place for everything you shop. Every purchase files itself into your Closet. Your shopper plans from what you already own, finds the better price, and checks out on the store's own site with a single-use card inside a budget you signed.
One product. Four pillars.
A shopping app sees one store. Your browser sees every store you buy from, so it's the only place that can keep the record of everything you own, and the only shopper that can act on it. Remember. Know. Act.
The Closet
LiveEvery purchase you make anywhere on the web, captured as you shop. Amazon knows what you bought on Amazon. Only your browser sees the whole closet.
The Stylist
LiveA personal shopper that plans from what you already own, not from a quiz. “Three days in the Bahamas. Pack it from my closet.”
The Checkout
LiveSign a budget with your passkey. Every order gets its own single-use card, scoped to one store. Your real card never leaves the vault.
The Reviews
NextProduct-page rooms where only real buyers can post, earning points merchants fund. A purchase is the one thing a bot can’t forge.
One founder. One obsession: make the browser the best place to shop.
The whole product, from the browser and the Closet to the shopper and the checkout, is built by one person and shipped daily, with an AI-native pipeline that moves like a funded team.
Luis Perrone
Founder & CEO · Miami10+ years building consumer and infra software. Led the design systems team at UKG, shipped Helium Mobile past 500,000 subscribers, co-founded DewiCats. Now building all of Basement solo, shipping daily.