Apparel Startups funded by Y Combinator (YC) 2026

PatternFast helps fashion companies and brands design and launch new collections in minutes instead of months. We save brands 90% of the time and 95% of the costs associated with the tedious, time-consuming, and complex process of garment design and development. Our AI software enables the instant design of over hundred billion of unique styles, complete with production-ready documentation, patterns, and automated sizing.

MTailor is an ipad or iphone service for men to capture their shirt size dimensions and have tailor made shirts made and delivered.

Vastrm Fashion™ (pronounced vas' trum) Vastrm was started to solve a basic problem: Shirts that don’t fit well! Mass produced shirts were meant to accommodate a wide variety of body types with one standard size, and different brands have different sizing standards, making shopping difficult--many men must shop in 4 - 5 different stores before finding a shirt that actually fits! By providing a home try on program and giving the ability to make custom fit adjustments to all of their apparel, Vastrm allows its customers to finally hone in on and find the perfect fit for their unique body types. Tang came up with the idea for Vastrm, which is a Sanskrit word for cloth, when a customer told him he had purchased a perfect shirt in Italy and has never been able to find the same fit again. He was considering flying back to Italy to track the shirt maker down, but Jonathan managed to adjust Vastrm shirts to the same fit.