❯ Harvey raises $550 million at an official $15.5 billion valuation as legal AI expands into models and evaluation

Official figureLegal AI company Harvey announced $550 million in funding on September 9, co-led by Diffusion and Lightspeed. Its announcement gives a $15.5 billion valuation, compared with $15.6 billion in Bloomberg’s report. The official figure is about 41% above the $11 billion valuation in March, with a small difference between the two latest accounts.

Clients and toolsHarvey says 80% of Am Law 100 firms use its product, alongside five of the Fortune 10. The funding follows its first post-trained open-weight model and the Harvey LAB legal agent benchmark. The company is bringing industry workflows, model adaptation and testing into one product direction, with proceeds supporting hiring and capability development.

Buying criteriaAdoption by a law firm or legal department does not mean every practice is deeply using the product, and customer coverage does not substitute for revenue. Accuracy on legal tasks has to show up in research, documents and multistep delivery, while confidentiality and review costs influence deployment depth. Whether specialized models and evaluations reduce rework will matter more to expanded purchasing than adding another generic chat interface.

▪ SIGNALInstitutional purchasing must support legal AI valuations. Model and evaluation spending is more likely to win sustained expansion when it reduces review and rework costs.