Diggz is described as 'free roommate marketplace to find roommates, rooms for rent, or someone to find a new place with. Diggz connects you to like-minded prospective roommates with similar lifestyles and preferences, leveraging a proprietary matching algorithm'. There are five alternatives to Diggz, not only websites but also apps for iPhone. The best alternative is 4stay. It's not free, so if you're looking for a free alternative, you could try FlatMateMe or Roomi. Other great sites and apps similar to Diggz are Roombuddy (Freemium) and FLATIO (Free).
Roomi is a mobile platform that’s re-inventing how people search and connect in the rental industry. Users can post listings, search for rooms or roommates based on lifestyle preferences, connect via in-app chat, apply and pay rent—in one platform.