Y-Bombinator is an agent built with 100x Bot by experienced founders who have applied to Y Combinator multiple times. The product helps newer YC applicants find confidence in their merits and internally check where their strengths and weaknesses lie. It provides independent audits generated by 100x.bot based on the experience of YC alumni.

The agent calculates your founder-score, validates the market math, and flags competing YC startups to predict your chances. It offers a streamlined workflow through a Chrome extension without needing a heavy, dedicated browser. Users can share their results online to receive free credits for continued use.

To use Y-Bombinator, users install the 100x Bot Chrome Agent and run a specific prompt called "execute @workflow:y-bombinator/audit-application" while adding their startup's details in a pop-up form. The system then generates an audit report that includes calculated scores and competitive analysis.

The benefits include getting a clear audit from people who've previously applied to YC, helping applicants avoid common mistakes. Use cases involve YC Spring 2026 applicants seeking to optimize their applications and improve their chances through data-driven insights.

The target users are newer YC applicants looking for mentorship and application optimization. The product integrates with 100x.bot's platform and requires installation of their Chrome extension for functionality.