About Definely
Introduction
Definely is a London-based legal AI company, founded in 2017, that builds a suite of tools — Read, Proof, Cascade, Enhance, and Vault — for reviewing, proofing, and de-risking complex contracts directly inside Microsoft Word. It integrates with iManage, NetDocuments, and SharePoint, and is used by more than 150 law firms and in-house legal teams, including Magic Circle and White Shoe firms such as A&O Shearman, Slaughter and May, DLA Piper, and Dentons. The company has raised roughly $40 million to date, including a $30 million Series B in June 2025 backed by Revaia and Clio Ventures. Definely achieved ISO/IEC 42001:2023 certification for AI management systems in June 2026 and partnered with Anthropic on the May 2026 launch of Claude for Legal.
Contract Analysis
Definely's core strength is structured contract review: its Read and Cascade tools track definitions and cross-references through a document and flag the ripple effects when a clause changes, while Enhance layers AI-powered analysis on top to surface risk. Proof audits documents for drafting errors (undefined or unused terms, inconsistent numbering, broken cross-references) that are easy for a human reviewer to miss in long agreements.
Document Drafting
Because Definely lives inside Word, lawyers draft and revise in their normal environment rather than switching tools, and Vault adds secure indexing and precedent search so drafters can pull from prior firm or company documents while writing.
Pricing
Definely does not publish pricing; prospective customers must book a demo and receive a custom quote, which is typical for enterprise legal-tech sold to law firms and large in-house teams.
User Reviews and Ratings
Definely's individual products (Definely Draft, Definely Proof) are listed on G2, where user reviews highlight time saved catching drafting errors in long contracts, though no single aggregated public rating score was consistently available at the time of writing. Adoption by major law firms and continued enterprise-focused investment (Revaia, Clio) point to strong reception among its target market of large firms and corporate legal departments.
Verdict
Definely is a strong fit for law firms and in-house teams that live in Microsoft Word and need deep, structural contract review rather than a standalone CLM or chat-style assistant. It is less relevant for teams wanting an all-in-one contract lifecycle platform or transparent self-serve pricing.
Facts
- Jun 3, 2026Definely achieves ISO/IEC 42001:2023 certification for AI management systems.
- May 12, 2026Definely partners with Anthropic on the launch of Claude for Legal, bringing its contract-review tools to Claude.
- Apr 30, 2026Definely introduces the Definely MCP, connecting its contract-drafting tools to third-party AI assistants via the Model Context Protocol.
- Feb 19, 2026Definely launches Reincorporate, letting lawyers merge reviewed clause revisions back into a master document with one click.
- Sep 25, 2025Definely launches Cascade, an AI feature that tracks the ripple effects of a contract edit across up to three levels of impact.
- Jun 1, 2025Definely raises a $30 million Series B with Revaia, Alumni Ventures, Beacon VC, and Clio, twelve months after its Series A.
- Jun 1, 2024Definely raises a $7 million Series A (exact date approximate, per the company's own 2025 year-in-review).
Investments
| Date | Investor | Round | Amount |
|---|---|---|---|
| Jun 2025 | Revaia, Alumni Ventures, Beacon VC, Clio | Series B | $30,000,000 |
| Jun 2024 | Undisclosed lead (per company recap) | Series A | $7,000,000 |
| Total (disclosed amounts) | $37,000,000 | ||
Frequently Asked Questions
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About the Company
Definely Ltd
Founded in 2017Definely was founded in September 2017 in London by Nnamdi Emelifeonwu and Feargus MacDaeid, former Freshfields lawyers, to help legal teams read, proof, and de-risk complex contracts inside Microsoft Word. The company has raised roughly $40 million to date, including a $30 million Series B led by Revaia in June 2025 with participation from Clio Ventures, and is backed at earlier stages by Microsoft and Google.