# Social

6 dead or acquired startups in Social with completed research reports.

## Every startup playbook in our database, ready to build

Each deep-dive includes a post-mortem, step-by-step rebuild plan, and a technical spec you can paste straight into Claude Code, Cursor, or Lovable.

### Ark
**Media**  
Ark organizes the world's social information.

### Couple
**Messaging**  
App that connects two phones and creates a private timeline to share…

### Datarank
**Analytics**  
Making sense of social data.  
(Acquired by SimplyMeasured.)

### Grouper
**Dating**  
We set up drinks between 2 groups of friends: 3 guys and 3 girls.

### Openland
**Community**  
Messenger for communities

### Tress
**Community**  
Tress is a social community for black women's hairstyles. We are…