San Francisco Bay Area's dominance in seed funding intensified dramatically in 2025, capturing 45% of U.S. seed capital—up sharply from 33% in 2024. This concentration reflects a bifurcated landscape where capital flows increasingly to fewer deals in major hubs, leaving smaller ecosystems with shrinking slices of the funding pie.

New York maintained its steady position at approximately 17% of seed funding, while Greater Los Angeles and Greater Boston each accounted for about 5%. The rest of the country's share dropped to just 28%, the lowest on record. Deal counts followed similar patterns, with Bay Area startups securing roughly one-third of all seed rounds.

Despite this capital concentration, geography tells a more nuanced story. Two-thirds of U.S. seed-stage startups were based outside the Bay Area, demonstrating that while money concentrates, startup formation remains broadly distributed. Median seed round sizes were actually higher in other major hubs than in the Bay Area, which has seen typical deal sizes shrink.

This consolidation of capital in top metro areas creates challenges for founders outside these ecosystems. While the Bay Area attracts the largest rounds, entrepreneurs in secondary markets face increased competition for diminished funding pools, potentially accelerating the geographic divide in startup creation and innovation.