Alejandro Rosas is Co-Founder and CTO at Didit (YC W26), an AI-native identity verification platform revolutionizing how businesses verify users and fight fraud. He is an identical twin who co-founded the company with his brother Alberto, bringing unique insight into identity challenges.

Alejandro studied Mathematics in the U.S. and played professional tennis before working as an AI engineer at Oracle in Silicon Valley. He also competed in several junior tennis events throughout Spain and played at New Mexico State University.

Alejandro is obsessed with tech and competition, combining his mathematical background with hands-on building experience. He made his first investment in Karumi (YC F25) and actively mentors other founders.

Didit raised approximately $2M and joined Y Combinator's Winter 2026 batch, growing at over 20% month-over-month. The company serves hundreds of businesses with state-of-the-art identity verification built from scratch.

Didit has built the fastest identity verification platform in the market with record-level security and transparent pricing. The platform processes identity checks with industry-leading conversion rates while remaining close to profitability with a lean team.