Polymorph

Polymorph is a business-to-business software company developing artificial intelligence-based personalization infrastructure for consumer and self-serve applications. The platform enables software developers to seamlessly customize individual user experiences and automated push notifications, directly aiming to improve customer retention, lifetime value, and overall customer acquisition costs. This specialized technology replicates the complex, large-scale machine learning infrastructure typically built internally over several years by major technology corporations such as Meta, TikTok, and Google. Operating with a lean team of exactly three full-time employees, the startup currently supports over 3.5 million end users across its active customer base and has recorded up to a 3.6-times increase in conversion rates for its clients. Backed by Y Combinator as part of its Winter 2026 batch, the early-stage company leverages its team's prior engineering leadership experience at prominent firms including Scale AI.