Y-Bombinator is an agent built with 100x Bot designed specifically for Y Combinator applicants. The tool helps newer YC applicants find confidence in their merits and internally check where their strengths and weaknesses lie. It provides an independent audit of startup applications based on the experience of YC alumni.

The agent calculates founder-scores, validates market math, and flags competing YC startups to predict application chances. It provides detailed scoring across multiple categories including team score, founder evaluation, market assessment, and competitor analysis. The system generates comprehensive audit reports that break down application strengths and weaknesses.

Users install the 100x Bot Chrome Agent and run a specific prompt workflow to initiate the audit process. After installation, users execute the "@workflow:y-bombinator/audit-application" prompt and provide their startup details in a pop-up form. The agent then processes this information to generate personalized feedback.

The primary benefit is helping YC applicants understand their chances before submitting official applications. For applicants scoring above 75%, the service includes a 1:1 mentoring session with experienced founders. The tool aims to reduce application failures by providing data-driven insights based on real YC application criteria.

Y-Bombinator targets YC Spring 2026 applicants specifically and is built by founders with extensive entrepreneurship experience who have consulted with 25+ founders and optimized 25+ applications. The service integrates with the 100x Bot Chrome extension ecosystem.