AI Venture Funding: North America Falls 35% as Megarounds Pause

A sharp drop that isn't a pullback

North American startup funding fell steeply in the third quarter. The headline number, though, overstates how much the market cooled.

Investors put $92 billion into seed- through growth-stage rounds for U.S. and Canadian startups in Q3. That is 35% less than the prior quarter but 50% more than the same period a year earlier. 2 The quarter-over-quarter decline mostly reflects something that didn't happen. OpenAI and Anthropic did not raise another giant round. Earlier in the year, those two companies pulled in financings of $110 billion and $65 billion. 2 Rounds that large distort any single quarter's totals, and the comparison suffers once they drop out.

The activity data supports the view that the market is still healthy. Deal volume stayed fairly steady, with late-stage and early-stage round counts close to prior-quarter levels. 2 Separate Crunchbase analysis found that active investors largely kept up or increased their dealmaking pace even as total dollars declined. 1 The overall picture is fewer mega-checks but roughly the same number of transactions.

AI still dominates the money

Artificial intelligence remained the main theme. About two-thirds of North American funding in the quarter went to AI-focused companies. 2 Much of that came from a few large rounds for Databricks, Safe Superintelligence and Crusoe. 2

The league table of lead investors shows the same concentration. Andreessen Horowitz and Nvidia ranked just behind the top spender. They led or co-led $6.5 billion and $6.3 billion in Q3 deals, respectively. 1

• Andreessen Horowitz: Much of its total came from two rounds, a $2 billion raise for Cognition and a $1.7 billion financing for Atoms. 1
• Nvidia: Its biggest deal was a $5 billion round for Safe Superintelligence. 1

That round also appears among the quarter's largest AI financings overall. 2 A single deal accounting for most of a major investor's quarterly total shows how much the rankings depend on a handful of outsized AI bets.

Nvidia's place near the top of a venture leaderboard deserves attention. A chipmaker leading AI startup rounds of this size blurs the line between strategic and financial investing. Nvidia's capital also likely flows back into demand for its own hardware. That is an interpretation rather than something either report states. Still, it is a structural feature of this AI cycle that investors should track.

Spending less, dealing more

The two reports agree on one notable split. The busiest lead investors generally picked up their pace in Q3. Yet the highest-spending among them appear to have deployed less capital than before. 1 This fits the broader data. Total dollars fell because the largest checks went unwritten, while deal counts held steady. 12

The picture differs somewhat across stages. Later-stage investment reached $66.45 billion in Q3. That is up about a third from a year ago but well below the first two quarters of the year, when the OpenAI and Anthropic rounds swelled the totals. 2 Early-stage funding showed a sharper decline, falling from a multiyear peak in the previous quarter. 2 This is the one area where the slowdown looks like more than a megaround effect. However, the steady round counts suggest the decline reflects smaller dollar amounts rather than fewer companies getting funded. 2

Seed activity holds its ground

Seed investors stayed busy, and the usual names remained at the top.

• Y Combinator led by a wide margin, taking part in at least 221 known seed rounds during the quarter. 1
• Antler followed with 31 reported seed deals. 1
• LvlUp Ventures and Rebel Fund recorded 24 and 23 deals, respectively. 1

The gap between Y Combinator and everyone else is large. It reflects the accelerator's batch model, which turns out deals at a scale few traditional funds can match. The stable seed rankings also suggest that the earliest stage of the market did not see much disruption this quarter.

What to make of it

It would be easy to read a 35% sequential drop as a sign that the AI funding boom is fading. The evidence points the other way. Funding is still up 50% year over year. 2 Deal volume is steady, and active investors are doing as many deals as before or more. 12 The decline comes mostly from comparing against a first half that included two of the largest private financings on record.

The more useful takeaway is how volatile the headline numbers have become. When one or two companies can raise tens of billions in a single round, quarterly totals say more about the timing of those raises than about the health of the wider startup economy. Crunchbase also notes that the largest AI companies are increasingly looking toward public markets. 2 If those firms go public instead of raising more private megarounds, quarterly totals could look smaller even while underlying activity stays strong.

The early-stage pullback is the trend most worth watching. For now, though, the market looks like it is in a lull between megarounds, not a retreat.