# YC S12

4 dead or acquired startups from batch S12 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.

### Clever

**Clever**  
Education  
The platform that powers technology in the classroom.

### Fullstack Academy

**Fullstack Academy**  
Education  
Pioneer in immersive code education. Acquired by Zovio (NASDAQ: ZVO)…

### GoScale

**GoScale**  
SaaS  
Dynamical Scaling Virtual Machines as a Service

### Natero

**Natero**  
SaaS  
Data-driven customer success platform for B2B SaaS.