The legal-AI startup is in talks to raise at least $500m at a $15.5bn valuation, including the new money, The Information reported. That is a 40% jump on the $11bn it set only five months ago, when it raised $200m. Harvey, founded four years ago, now makes more than $350m in annualised revenue, up over 80% from $190m in January. Vertical AI is having a momentHarvey is the poster child for vertical AI, software built for one profession rather than everyone. A four-year-old company is worth more than most listed software firms, on the strength of a product lawyers did not know they wanted two years ago.