Definely enters legal AI agent race with new contract review tool

Legal tech startup Definely has launched its own agentic AI product, marking the UK-founded company’s move into one of the most competitive frontiers in the legal AI space.

The new tool, known as "Enhance", announced this week, is being rolled out to Definely’s 100+ global customers, including A&O Shearman, Deloitte and Dentons. It promises to help lawyers tackle core contract review tasks faster, cutting workflow time by up to 70%, according to the company.

How it works

Unlike traditional AI that follows pre-defined steps, agentic systems operate more like autonomous legal assistants. Enhance deploys a team of specialist AI agents - each trained to handle a specific task, like clause analysis or summarisation - which work together to plan and execute reviews. Everything runs directly inside Microsoft Word, meaning lawyers don’t need to switch apps or upload files.

Lawyers stay in control, with the AI output monitored and improved using Definely’s own legal datasets and in-house legal expertise.

Built for lawyers

Definely co-founder Feargus MacDaeid - a former Freshfields lawyer - says the company has been deliberately measured in its AI rollout, focusing on real use cases and lawyer-led design.

"We’ve not rushed into building generic AI tools", said MacDaeid. “Instead, we’ve spent time identifying segments of the market that will derive the most value for lawyers."

Sigurjón Ísaksson, Definely’s head of AI, added: "We’re building AI agents that mirror how legal professionals approach their work today. The 'Enhance' product is interoperable with our Definely suite and can be used through a single natural language interface, which means lawyers don’t have to switch between multiple documents and files at the same time."

AI agents the next frontier

Definely, which raised $7 million in Series A funding last year from Octopus Ventures, now joins the growing pack of startups racing to build enterprise-grade, lawyer-friendly agentic AI systems to reshape legal workflows.

In April, A&O Shearman announced its own suite of AI agents in collaboration with Harvey, aimed at tasks like fund formation and antitrust filings.

For more on Definely's story, listen to our conversation with co-founder (and also former Freshfields lawyer) Nnamdi Emelifeonwu on The Non-Billable Podcast.