# YC S21

15 dead or acquired startups from batch S21 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.

### Abbot
  
**Industry:** Developer Tools  
**Description:** Your Customer Success Co-Pilot

### BlackOakTV
  
**Industry:** Entertainment  
**Description:** A video subscription platform serving black viewers and creators.

### Buzzle
  
**Industry:** AI-Enhanced Learning  
**Description:** Automatic voice-of-customer trends & metrics from sales conversations.

### Cache
  
**Industry:** Marketplace  
**Description:** Online convenience stores fulfilled by tiny, automated dark stores.

### Gobillion
  
**Industry:** E-commerce  
**Description:** Pinduoduo for India

### Level
  
**Industry:** Fintech  
**Description:** Fast and simple fintech financing

### Mentum
  
**Industry:** Artificial Intelligence  
**Description:** AI-Powered Assistant for Procurement and Strategic Sourcing

### Mindmesh
  
**Industry:** SaaS  
**Description:** Mindmesh is the virtual desk that puts you in control.

### Onsite Pro
  
**Industry:** Construction  
**Description:** Revolutionizing digital selling within HVAC

### Opkit
  
**Industry:** SaaS  
**Description:** AI phone calls for the US healthcare industry

### Positional
  
**Industry:** SaaS  
**Description:** A modern platform for content marketing & SEO.

### Quest
  
**Industry:** Community  
**Description:** Audio career advice

### Squire.ai
  
**Industry:** Artificial Intelligence  
**Description:** Never code alone.

### Telivy
  
**Industry:** Security  
**Description:** Automate your cyber security risk assessments

### Wabi
  
**Industry:** SaaS  
**Description:** We are Shopify for the $15B creator economy in LATAM