Y Combinator hosted its first-ever Spring Alumni Demo Day on June 8, 2025, showcasing 141 startups from the YC X25 batch. This batch, the first spring cohort in Y Combinator's history, demonstrated remarkable growth, with an average weekly revenue increase of 12%, marking the fourth consecutive batch to exceed 10% weekly growth. Several startups from this batch, including Better Auth, TextAI, Cactus AI, Approval AI, Den, and SynthioLabs, were highlighted by Forbes as top performers. The event drew attention to the accelerating pace at which startups are growing and raising capital, underscoring the strength of the YC X25 batch.