Harvey has acquired AI startup Aida, its fifth acquisition this year, adding a team of search and machine learning engineers to its business.
The deal comes amid a wave of consolidation in legal AI, with rival Legora also completing five acquisitions in 2026 and Thomson Reuters expanding through acquisitions.
Harvey has snapped up its fifth company of the year, acquiring AI-native sales execution platform Aida as a wave of dealmaking gathers pace among some of legal technology's biggest players.
Harvey said the acquisition would help law firms make better use of the information stored across their documents and internal systems, giving AI tools a deeper understanding of a firm's work and making their outputs more relevant.
"Legal teams have decades of valuable knowledge locked away in documents and systems that are difficult to search and connect," said Harvey chief executive Winston Weinberg. "Unlocking that knowledge securely will fundamentally change how they work.”
Aida was founded by Piyush Prahladka, also a co-founder of enterprise AI search engine Glean, and Atish Das Sarma, who previously held senior engineering and data science roles at Patreon, Apple and X.
The founders and their team of search and machine learning engineers will join Harvey's product and engineering division. Financial terms of the deal were not disclosed.
Buying spree
The deal continues a busy year of acquisitions for Harvey, which bought AI security startup Guardrails AI in September and asset management platform Benchmark in July.
Earlier acquisitions included customer data startup Lume AI and product demonstration platform Hexus. The purchases have brought new engineering talent and technical capabilities into Harvey as it develops AI agents capable of carrying out increasingly complex legal work.
Harvey has also been raising substantial amounts of capital to fund its expansion. In September, it secured $550 million in fresh investment at a $15.5 billion valuation.
Its main rival Legora has been equally active in the acquisition market.
The Swedish company has also completed five acquisitions this year, including Canadian legal AI startup Walter and regulatory intelligence business Graceview and commercial real estate platform Cadastral.
In July, Legora acquired London-based litigation AI startup Wexler, whose technology is used by firms including Clifford Chance, Goodwin and Herbert Smith Freehills Kramer.
That deal brought Wexler's 18-person team into Legora and established a new engineering hub in London.
Turning deals into products
The acquisitions are already feeding into new products. On Thursday, Legora launched a new legal research capability built on technology developed by Qura, which it acquired in April.
The system maps relationships between legal sources, helping its AI identify when cases have been overturned or laws have changed. Legora said the technology makes its research agent 40% faster.
Established legal technology companies are also joining the acquisition wave. In February, Thomson Reuters acquired New York-based Noetica, an AI startup that analyses corporate transaction data to help lawyers compare deal terms and market practices.
Thomson Reuters said it planned to integrate Noetica's technology into its CoCounsel AI platform, allowing lawyers to access market intelligence while drafting and negotiating transactions.
The dealmaking reflects a broader push to bring more legal capabilities into a single AI platform, whether through acquisitions of specialist legal technology or teams with expertise in areas such as search, data management and AI reliability.
The acquisitions come as investors continue pouring money into legal AI. Earlier this month, Legora raised $550 million at a valuation of $8.8 billion, following Harvey’s funding round in September, giving both companies substantial financial resources to pursue further deals.
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