Stable

Stable is an AI-powered virtual mailbox and business address service that turns the office mailroom into software. Founded in 2019 and part of Y Combinator's Winter 2020 batch, the company gives distributed and remote-first businesses a permanent U.S. address, scans and digitizes incoming physical mail, and automates downstream workflows like check deposits, registered agent filings, and routing. More than 15,000 businesses - from startups to enterprises like Gusto, Brex, and DoorDash - use Stable to handle mail from anywhere.