We built DoorStopper because
listing a room sucks

The problem

Rental platforms each have their own quirks. Craigslist wants plain text with specific section headers. Facebook Marketplace has character limits and wants emojis. Zillow wants professional copy. SpareRoom is all about roommate compatibility. Formatting a single listing for 10 platforms is genuinely tedious work that pulls landlords away from actually managing their properties.

On top of that, most landlords aren't professional copywriters. The difference between a listing that rents in 3 days and one that sits for 3 weeks often comes down to how it's written, the headline, the description, the way amenities are framed.

We knew AI could help with both problems. So we built DoorStopper.

What we built

DoorStopper is a guided wizard that collects everything about your rental - room details, amenities, house rules, your ideal tenant, contact info, and uses AI to generate compelling copy tailored for each platform. Then it pre-formats everything so you just copy, paste, and post.

We use Claude (by Anthropic) for content generation because it produces genuinely good, context-aware writing. Not boilerplate. Not generic filler. Actual descriptions that convert.

Who it's for

Individual landlords with one or two units. Small property managers with a growing portfolio. Anyone who has a room to rent and doesn't want to spend their weekend posting the same thing to ten different websites.

Built in Arizona

Get in touch

Questions, feedback, partnership inquiries, we read every email.