Definely has partnered with OpenAI to bring its contract review technology directly into ChatGPT Enterprise through OpenAI for Law, giving lawyers access to specialized legal verification tools without leaving their AI workflow.
The London-based legal technology company focuses on helping lawyers review complex contracts more efficiently and accurately. Its new integration is designed around an emerging challenge in legal AI: while generative AI has dramatically accelerated drafting, lawyers still need to independently review and validate what those systems produce.
Definely argues that this shift is changing where the bottleneck sits in legal work.
Instead of spending most of their time generating first drafts, lawyers increasingly need tools that can verify contractual language, identify structural issues and confirm whether AI-generated work aligns with precedent and established legal standards.
That distinction could become more important as law firms, corporate legal departments, insurers and regulators scrutinize how AI-generated legal work is reviewed and approved. Definely’s position is that the same system responsible for creating legal content should not necessarily be the only system responsible for validating it.
The integration uses the Model Context Protocol, or MCP, to make Definely’s contract review capabilities available directly within ChatGPT Enterprise.
Lawyers can use the integration to perform defined-term validation, search their firm’s precedent bank, conduct structural proofreading and automatically generate issues lists without leaving the ChatGPT environment.
The approach effectively combines AI-assisted drafting with a separate review layer intended to produce more structured and auditable verification.
Definely’s tools were previously centered around its Microsoft Word add-in. Bringing the same capabilities into ChatGPT Enterprise expands the company’s presence into enterprise AI workflows while maintaining its focus on contract analysis and review.
The partnership reflects a broader change in how legal professionals are beginning to use generative AI.
As drafting becomes faster, legal teams may increasingly need technology that can inspect the structure and implications of documents created or modified by AI. That includes verifying defined terms, checking agreements against internal precedent and identifying potential inconsistencies before work is delivered to clients or approved internally.
Definely positions itself as an independent review layer within that process.
The company says its technology surfaces the full structure of complex contracts and helps lawyers understand the implications of individual changes, supporting negotiation and review while preserving human legal judgment.
Definely is already used by thousands of lawyers globally.
Its customers include major law firms such as A&O Shearman, Slaughter and May and DLA Piper, along with in-house legal teams at companies including IKEA and Samsung.
The company was founded in 2020 by Nnamdi Emelifeonwu and Feargus MacDaeid, who previously worked together at Freshfields.
Definely is also a launch partner for both Anthropic’s and OpenAI’s legal offerings, giving the company a role across multiple emerging enterprise AI ecosystems.
The OpenAI partnership extends Definely’s strategy of embedding its technology into the tools lawyers already use rather than requiring them to move into separate applications.
That model could become increasingly important as legal teams consolidate more research, drafting and analysis inside AI-enabled work environments.
By putting specialist contract review capabilities directly inside ChatGPT Enterprise, Definely is attempting to address one of the next major workflow challenges created by generative AI: not generating legal content faster, but verifying that the resulting work is accurate, consistent and defensible.
KEY QUOTES:
“We’re proud to be partnering with OpenAI for Law to bring Definely to ChatGPT Enterprise.”
“Where generation was once the bottleneck, it has now shifted to review.”
“This is why we continue to support our customers, enabling structured, credible and auditable review in the tools they use every day.”
Nnamdi Emelifeonwu, CEO of Definely
