Funding benchmark · last 12 months

The typical Series B round in AI

From 255 Series B rounds announced in AI over the last twelve months, each read from a named source. Half of them raised between $38M and $120M.

See the roundsAll benchmarks

Series BAI
Median round$55M
$24M1 in 10 below$38M – $120Mmiddle half$250M1 in 10 above

255 rounds counted · recounted nightly

Rounds counted255Series B rounds in AI, last 12 months
Against worldwide+10%vs the $50M worldwide median
Since last round12 momedian gap, from 85 companies we saw raise before
Lead named89%of these rounds name the investor who led

The trend

Median Series B round, quarter by quarter

From $32M in 2024 Q4 to $60M in 2026 Q3. Quarters with fewer than five rounds are left blank.

$32M'24 Q421 rds
$55M'25 Q119 rds
$46M'25 Q226 rds
$44M'25 Q328 rds
$42M'25 Q436 rds
$60M'26 Q170 rds
$60M'26 Q263 rds
$60M'26 Q363 rds

Who leads

The most active leads

The firms that led the most Series B rounds in AI this year.

  1. 1General Catalyst7 led
  2. 2Accel6 led
  3. 3Insight Partners6 led
  4. 4Lightspeed Venture Partners5 led
  5. 5Battery Ventures5 led
  6. 6Sequoia Capital4 led

Recent examples

Series B rounds in AI, latest first

How to read these figures

They come from announced rounds. Large rounds are almost always announced and many small ones never are, so the true typical round is probably a little smaller than shown, most of all at pre-seed and seed. Every round behind them is in the record with its source. How we read rounds.

Other stages in AI

Pre-seed$2.1MSeed$7.0MSeries A$21MSeries C$110MSeries D$150MGrowth$150M

Series B elsewhere

United States$60MFintech$40MUnited Kingdom$43MHealthcare$46MBiotech$63MConstruction$40MCybersecurity$58MRobotics$63MEnterprise Software$49M

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Q&A

How big is a typical Series B round in AI?

The median is $55M, from 255 Series B rounds announced in AI in the last twelve months. Half of them raised between $38M and $120M; one in ten raised more than $250M.

Which rounds are counted?

Rounds announced in the last twelve months with a stated amount and stage, each read from a named article or filing. A page is only published where at least 30 rounds stand behind it.

Are these figures biased?

Towards larger rounds, yes. Big rounds are announced; many small ones never are. So the true typical round is probably a little smaller than the figure here, especially at pre-seed and seed.

How often does it change?

The figures are recounted from the record every night, as new rounds are read.