U.S. Series A Funding Hits $42 Billion, Up 60% — for Fewer Winners

By Grace Kim

U.S. startups have raised $42 billion in Series A rounds this year through October, up roughly 60% year over year — while the number of deals hasn't budged, according to Crunchbase data. More money is chasing the same number of companies, and the gap between winners and everyone else is widening.

The numbers frame an increasingly split early-stage market. AI is driving demand for capital and letting some startups grow at speeds nobody has seen. Others can't turn first customers into repeatable sales.

The trend line is stark. Series A bottomed in 2023 at $23 billion invested in U.S.-based startups. Annual totals have climbed every year since, and 2026 has doubled the 2023 figure.

Deal counts tell the opposite story. They've held steady at an average of 1,200 companies funded at Series A rounds of $1 million or more from 2023 through 2025. This year is tracking the same, give or take 100 deals.

What does the split mean for startups?

Investors are responding by moving in opposite directions. Some are writing much larger checks at seed to get ahead of the competition. Others wait until Series B or beyond for clearer evidence a business is taking off. Series B shows the same pattern of fewer but larger deals.

Companies still proving their growth potential face a Series A crunch even as capital floods the fastest-growing businesses.

"On the application side, it's a bit harder, and that's where I think there's more of a Series A crunch," said Siddharth Ramakrishnan, a partner at Scale Venture Partners, which primarily leads Series A and B rounds.

Go big and early — or wait

Competition among early-stage investors has intensified, and VCs increasingly pick one of two opposing strategies, Ramakrishnan said: write much larger checks much earlier, or hold back for later rounds.

Check sizes under the first strategy have ballooned. Seed deals of $10 million to $20 million are not uncommon, he noted.

"Instead of waiting till the Series A, where they have $4 million in revenue and growing, you're going to do it when they have $500,000 in revenue, they have a pilot, the team is smart," Ramakrishnan said.

The second camp reasons the opposite way. "'I'm not getting any new information by the time they're at $2 million in revenue from $500,000, so I'm just going to wait until they actually take off,' and then you're seeing a gap," he said. "People are putting in a lot of money at the Series B, Series C onwards, because that's when you get the signal that things are really working."

Scale Venture Partners itself expects more variance in its current fund. Its preference is to stay at the Series A and B risk profile — "potentially pulling a little bit earlier and a little bit later and recreating it in the aggregate," Ramakrishnan said.

The firm has more firepower to do it. Its most recent fund, Fund 8, is its largest to date at $900 million, up from its prior $600 million vehicle.

"We still think that Series A is a great place to be if you can make it happen, because it's at that point where you ideally have enough information to make an informed bet, but not enough that there's still some of the growth investors that are scared to come in," Ramakrishnan said. "And so you get great companies at great prices."

How big are the rounds getting?

Every quartile of U.S. Series A rounds has trended larger this year, Crunchbase data shows. In 2026 to date, 10% of Series A rounds come in at $75 million or more — up from the $50 million threshold in 2025.

Those bigger checks are producing hypergrowth. "Instead of going zero to $7 million, which in the old world would have been amazing numbers, now there's people going zero to $20 million, or zero to $30 million," Ramakrishnan said.

Why do some founders raise big while others stall?

For founders, landing a large Series A often hinges on converting a handful of early customers into a repeatable sales process. Many startups get stuck at that transition, even as investors compete to back the ones that break through.

"If you have the ambition to build a world-class company, then you also need to raise a big Series A to expand and go abroad, take on different types of markets," said Anke Huiskes of NP-Hard Ventures, a European seed investor in product-focused founders, speaking at the HumanX Amsterdam conference on AI earlier this year.

"I think the whole messy phase is in this go-to-market phase where you don't really know who your ideal customer profile is," Huiskes said. She's watched startups stall with a few customers but not enough growth. "A lot of the companies hang out here," she said.

For the rare startups that do build a repeatable sales cycle, VCs come calling fast. "And then I get a text, 'Can you please give me an intro?' And all of a sudden, I have 10 term sheets. So it's really black and white," Huiskes said.

The takeaway: Series A capital in 2026 isn't scarce — it's selective, and founders who crack repeatable sales before the round will keep capturing a growing share of a shrinking-pie market.