All Platforms at a Glance
| Platform | Compatibility | Seeker Cost | Landlord Cost | Safety |
|---|---|---|---|---|
| CoHabby | versioned, six-category Synergy Scores | Free | $2.99/mo | In-app messaging, privacy-first |
| SpareRoom | None | Free (limited) | Paid boost | Account-based |
| Roommates.com | Basic preferences | Free (very limited) | Subscription | Account-based |
| Craigslist | None | Free | Free | No verification |
| Facebook Marketplace | None | Free | Free | Rampant scams, profile exposed |
| Apartments.com | None | Free | ~$349/30 days | Professional platform |
| Roomi | Basic filters | Free (limited) | Varies | Declining activity |
| Diggz | Some matching | Free (limited) | Paid plans | Account-based |
Detailed Reviews
CoHabby
CoHabby uses a versioned compatibility heuristic across six weighted categories. Eligible pairs can receive a Synergy Score once both profiles have enough answered data. The score summarizes stated alignment and differences to discuss before deciding whether to continue a conversation.
The trade-off is scale. CoHabby is newer than Craigslist or SpareRoom, so the user base is still growing. It currently covers major US metros. Treat the score as one screening input, not a guarantee of fit, safety, or a successful living arrangement.
Full comparison: CoHabby vs Craigslist | CoHabby vs Facebook Marketplace
SpareRoom
SpareRoom is the go-to roommate platform in the UK and has been expanding into the US. Listings are well-structured, and the speed flatmating events are a genuinely useful feature for meeting potential roommates in person. The UK coverage is excellent; the US coverage is spottier.
No compatibility scoring. You filter by basics like budget and location, then read listing descriptions to gauge fit. Better than Craigslist's free-for-all, but you're still doing most of the screening yourself.
Roommates.com
Roommates.com is one of the oldest roommate platforms, with a large US database. Offers basic preference matching. The significant downside: the free tier barely lets you do anything. You can browse listings but can't view full profiles or send messages without paying. In a world where CoHabby offers full access for free (seekers), paying just to see who posted a room feels like a hard sell.
Craigslist
Still the largest room rental classifieds site in most US markets. Craigslist is free to post, free to browse. The problems are well-known: scam listings, no verification, no compatibility data, and the same interface since 2002. It works as a volume play. You'll get responses. Whether any of them are compatible housemates is entirely left to chance.
Full comparison: CoHabby vs Craigslist | Best Craigslist Alternatives
Facebook Marketplace
Massive reach thanks to Facebook's user base. Free. Also has a documented fraud problem that the FTC warns about. Stolen listing photos, fake landlord profiles, and deposit scams are common. Messaging someone about a room exposes your full Facebook profile. No compatibility matching. It's reach at the cost of safety.
Apartments.com
Professional-grade platform designed for apartment complexes. High listing quality, excellent search tools. But the pricing is prohibitive for individual landlords: approximately $349 for 30 days. That's fine for a 200-unit apartment building. It's absurd for someone renting a spare room. No roommate matching or compatibility features.
Roomi
Roomi was once a popular roommate app, particularly in New York. It offered background checks and some matching features. However, the platform has significantly scaled back operations and active listings are limited in most markets. If it's active in your area, it may still be worth checking, but don't rely on it as your primary search tool.
Diggz
Diggz offers some compatibility matching features and positions itself as a "Tinder for roommates." The matching is less detailed than CoHabby's six-category approach but more than what Craigslist or Facebook offer. Coverage varies by market, and the free tier has limitations. Worth trying alongside other platforms.
How to Choose the Right Roommate App
There's no single best platform for every housemate search. Here's a quick decision framework:
- You want compatible matches: Use CoHabby. It offers a versioned, six-category compatibility heuristic.
- You want maximum volume: Use Craigslist and Facebook Marketplace. Be prepared to screen heavily and watch for scams.
- You're in the UK: SpareRoom is the dominant platform there.
- You're a landlord on a budget: CoHabby at $2.99/month gives you compatibility-sorted housemate leads for less than a coffee.
- You want to compare channels: Check current inventory and features across CoHabby, Craigslist, Facebook, and other active platforms in your market.
About CoHabby
CoHabby is a compatibility-first roommate finder app available on iOS, Android, and the web. Founded by CJ Emerson and Fatine Bouanane. For eligible pairs with enough answered data, CoHabby's versioned compatibility heuristic summarizes profile and quiz signals across six weighted categories. The Synergy Score describes stated alignment and differences; it is a conversation starter, not a guarantee of how living together will go.
CoHabby is free for anyone looking for a roommate. Landlords listing rooms pay a subscription at $2.99 per month. The platform currently covers major US metro areas including New York, Los Angeles, Chicago, Seattle, Austin, Miami, and more.