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YC S19

11 dead or acquired startups from batch S19 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.

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S19
Acquired
Bun logo

Bun

Developer Tools

Bun is an incredibly fast all-in-one JavaScript toolkit

S19
Acquired
Compound logo

Compound

Fintech

Compound is a wealth manager for people who work at tech companies.

S19
Inactive
Elpha logo

Elpha

Community

Professional network for women

S19
Inactive
Fit to Form logo

Fit to Form

E-Commerce

Fit to Form is a site where women shop for dresses based on their…

S19
Acquired
MyPetrolPump logo

MyPetrolPump

Logistics

On demand fuel delivery service in India

S19
Acquired
Palifer logo

Palifer

Artificial Intelligence

Predictive maintenance models for trains and heavy industry

S19
Acquired
PopSQL logo

PopSQL

Developer Tools

SQL editor for teams

S19
Inactive
RC

ReverCare

Health Tech

Concierge for elder care

S19
Inactive
Souffle Club logo

Souffle Club

Social Network

Souffle Club:10x better LinkedIn alternative with profiles >> resumes

S19
Acquired
TaxProper logo

TaxProper

Fintech

TaxProper helps large Real Estate owners manage their property taxes.

S19
Acquired
Voyage Biomedical logo

Voyage Biomedical

Hardware

Using cooling to end brain damage during stroke.

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