YC S15

10 dead or acquired startups from batch S15 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.

Afrostream

Video
AFROSTREAM is Netflix for African-American and African content…

Bistrobot

Food Service Robots & Machines
We make robots that make sandwiches.

Call9

Call9 delivers true Emergency Medicine and Palliative Care at patients' bedsides. Currently in Skilled Nursing Facilities, Call9 decreases the time patients wait to see an EM Physician from an average of 64 minutes to moments in emergency situations.

In tandem with 24/7 onsite Clinical Care Specialists*, offsite Emergency Medicine Physicians see, diagnose and treat patients at the bedside via the Call9 proprietary platform. Our focus goes beyond the medicine to assure premium patient-centered care by including patients, caregivers, and families in communications from the start.

Today, our proprietary technology-enabled services reduce cost and increase quality-of-care within elder-care facilities. Tomorrow, we redefine emergency medicine.
*Clinical Care Specialists(TM) are elite emergency responders. Excellent bedside manner and rigorous continuing emergency training make Call9, PC's CCSs a unique specialty.

CareLedger

Health Tech
CareLedger helps companies save money on healthcare expenses by…

Cloudstitch

Developer Tools
Power your website with Google Spreadsheets. Acquired by Instabase…

Gigster

Build and manage distributed teams

Reduced Energy Microsystems

Artificial Intelligence
Building the lowest-power silicon for embedded deep learning and…

Triplebyte

SaaS
Intelligent technical hiring.

VOIQ

SaaS
Conversational AI VoiceBots for Business

Willing

Documents
The best way to make your legal will.