Kirkland & Ellis said Monday it will embed Syllo's litigation AI platform into its practice under an exclusive arrangement that gives the firm broad rights to build proprietary tools on top of the commercial system. The move, which follows a $500 million commitment to an in-house AI platform, marks the latest escalation in the firm's bid to fuse senior legal judgment with machine-driven analysis.
Syllo, a New York-based company legally known as TLA Tech Inc., builds what it calls "the first unified platform for case management, eDiscovery, legal research, analysis, and drafting." Kirkland litigation partner Elizabeth Hess, a member of the firm's executive committee, said the platform's capabilities stood apart. "The platform, knowledge infrastructure and agentic solutions for litigation are decisively ahead of every other solution we evaluated," Hess said.
Exclusive rights after multiyear review
Kirkland said it selected Syllo following a "multiyear" evaluation and secured exclusive custom-build rights "for a period of time." Andrew Kassof, who leads the firm's litigation practice and serves on the executive committee, said that exclusivity will let the firm shape how its lawyers use the technology. "Syllo's platform and our exclusive custom-build rights will allow us to bring our most senior judgment and proprietary know-how to bear in our development and deployment of litigation AI," Kassof said. The partnership reflects how AI for Legal Professionals is becoming a core competitive differentiator among major firms.
$500 million bet and litigation revenue growth
The Syllo deal comes a month after Kirkland disclosed it would spend $500 million to build its own AI platform. A week later, the firm announced a collaboration with Palantir aimed at its private fund practice. Those investments track the trajectory of Kirkland's litigation group, which now generates roughly $3 billion in annual revenue, Bloomberg Law has reported.
The firm has assembled over 180 AI engineers and data scientists, while more than 250 Kirkland attorneys-including about 100 equity partners-work inside "AI Pods" and on custom builds. The firm's stated goal is to use AI to put its collective knowledge and judgment at every lawyer's fingertips.
Syllo's Big Law pedigree
Syllo was founded in 2019 by Jeffrey Chivers and Theodore Rostow, both with backgrounds as litigators at Sullivan & Cromwell and Simpson Thacher & Bartlett. The company raised $30 million in growth capital last October from venture firms Venrock, Two Seas Capital, and other strategic investors. Ballard Spahr, Pillsbury, and Quinn Emanuel are among the firms that have used the platform.
Why this matters for legal professionals
Kirkland's exclusive arrangement with Syllo-backed by years of evaluation and a nine-figure AI commitment-signals that custom litigation AI is moving from experiment to operational backbone at the largest firms. For litigators, the takeaway is direct: when the highest-revenue firm in the world builds proprietary AI into its $3 billion practice, the technology isn't a side project. It's the standard against which opponents and co-counsel will be measured.
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