Headquarters
San Francisco, CAFounded
2013CEO / Founder
Jake HellerEmployees
201-500Funding
Acquired — $64.3MProducts
1 product listedAvg. AI Score
7.6/10Website
casetext.com/Profile updated
Casetext, Inc. was founded in 2013 by Jake Heller and Laura Safdie in San Francisco, California, to build software that applies artificial intelligence and natural language processing to legal research and document review. The company grew out of the idea that legal research, traditionally dominated by manual review of case law and statutes, could be made faster and more accurate through machine learning.
The company's flagship product, CoCounsel, launched in 2023, is an AI legal assistant built on OpenAI's GPT-4 that performs tasks such as document review, legal research memos, deposition preparation, and contract analysis. Casetext also previously offered a legal research platform that indexed case law, statutes, and regulations, competing with established providers such as Westlaw and LexisNexis. Its customers included law firms, corporate legal departments, and government agencies.
Casetext raised approximately $113 million in venture funding from investors including August Capital, Union Square Ventures, and Canvas Ventures over its history. In June 2023, Thomson Reuters announced its acquisition of Casetext for $650 million in cash, one of the largest acquisitions in legal technology at the time, integrating CoCounsel into Thomson Reuters' legal products including Westlaw.
Dated, source-cited figures. Estimates are marked.
All products by Casetext, Inc. reviewed by our AI panel of experts.
Who Casetext, Inc. competes with, and how they differ.
The incumbent Casetext was built to undercut: a full primary-law database bundled with the Shepard's citator, sold on multi-year enterprise contracts, where Casetext competed on flat, lower pricing and a lighter research stack. Its Lexis+ AI assistant is now the head-to-head rival to CoCounsel.
1 product reviewed on TopReviewedHarvey sells an AI legal assistant top-down to elite AmLaw 100 and global firms via bespoke deployments and custom models, and licenses rather than owns its case-law corpus. Casetext paired CoCounsel with its own research database and priced for small and mid-size firms.
1 product reviewed on TopReviewedvLex (merged with Fastcase) is the other independent primary-law publisher, pairing a multi-jurisdiction global corpus with the Vincent AI assistant — the closest like-for-like to Casetext's research-plus-assistant combination, but weighted toward international coverage rather than U.S. federal and state law.
1 product reviewed on TopReviewedLegora sells a collaborative AI workspace for lawyers built around review tables and drafting inside Microsoft Word, and grew from Europe into the U.S. It competes on the assistant layer only, licensing third-party legal content instead of running its own case-law database.
1 product reviewed on TopReviewedPaxton AI targets the solo and small-firm end of the market Casetext originally served, with a citation-grounded research and drafting assistant sold at a low per-seat subscription and self-serve signup rather than an enterprise sales motion.
1 product reviewed on TopReviewedKey milestones in Casetext, Inc.'s history, with sources.
CoCounsel passes 1 million users across 107 countries
Thomson Reuters announced the milestone at a San Francisco event, three years after CoCounsel launched on March 1, 2023. The company said it invests more than $200M a year in productized AI and holds roughly $11B of capital capacity through 2028.
lawnext.comThomson Reuters launches CoCounsel Legal with agentic AI and Deep Research
The CoCounsel line moved from prompt-and-response assistance to agentic workflows that plan, reason and execute multi-step tasks. Deep Research is grounded in Westlaw content including Key Numbers and KeyCite; Westlaw Advantage followed on August 13, 2025.
lawnext.comThomson Reuters completes the $650M acquisition of Casetext, Inc.
The all-cash transaction closed roughly seven weeks after signing, folding Casetext and CoCounsel into Thomson Reuters legal business alongside Westlaw and Practical Law.
thomsonreuters.comThomson Reuters agrees to acquire Casetext for $650M cash
Thomson Reuters signed a definitive agreement to buy the 104-employee company, whose customers included more than 10,000 law firms and corporate legal departments. CEO Steve Hasker framed the deal as part of a build, partner and buy generative-AI strategy.
thomsonreuters.comCoCounsel launches as the first AI legal assistant built on OpenAI GPT-4
CoCounsel handled document review, legal research memos, deposition preparation and contract analysis. Casetext, granted early access to GPT-4, ran a beta with roughly 150 firms including Fisher Phillips, Eversheds Sutherland and Orrick, reporting nearly 4,000 hours of fine-tuning across more than 30,000 legal questions.
lawnext.comSeries C — $25M led by BuildGroup
BuildGroup led, with Union Square Ventures, Canvas Ventures, Y Combinator and Touchdown Ventures participating; total raised reached $64.3M. CEO Jake Heller said the company was operating near profitability and raised to fund further AI investment.
lawnext.com$8.2M investment led by a top-grossing U.S. law firm
An unnamed top revenue-generating U.S. law firm led the round alongside existing investors Union Square Ventures, Canvas Ventures and Y Combinator Continuity, pushing total funding past $40M. The capital was earmarked for Compose.
lawnext.comCompose launches, automating first drafts of litigation briefs
Compose generated draft briefs for six procedural motion types from jurisdiction-specific argument outlines, and shipped with Parallel Search, a natural-language case-law search. Pricing started at $99 for a first brief for solos and small firms.
lawnext.comCARA named New Product of the Year by the American Association of Law Libraries
The AALL award went to CARA (Case Analysis Research Assistant), which reads an uploaded brief or memo and surfaces relevant cases it omits. It was the first product to apply AI to brief analysis in legal research.
lawnext.comSeries B — $12M led by Canvas Ventures
Canvas Ventures led, joined by Union Square Ventures, 8VC and Red Sea Ventures, taking total funding to $20.8M. Proceeds were directed at CARA, the brief-analysis assistant Casetext had commercialized in July 2016, plus sales and support.
lawnext.comSeries A — $7M led by Union Square Ventures
Union Square Ventures led the round, with former Thomson Reuters and Reuters Group CEO Tom Glocer among the investors. The financing brought total funding to $8.8M, including $1.8M of seed capital raised in October 2013.
lawnext.comCasetext launches out of Y Combinator as a crowdsourced case-law library
Founded in 2013 by Jake Heller and Joanna Huey, Casetext opened free access to more than a million U.S. cases with Wikipedia-style user annotations. It positioned itself as a value-added alternative to the paid research services Westlaw and LexisNexis.
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