Definely
Definely is a London-based LegalTech company offering AI-powered contract drafting, review, and proofreading tools built natively within Microsoft Word for large law firms and corporate legal departments handling complex transactions.
- Company typePrivate
- Founded2017
- HeadquartersLondon, United Kingdom
- Headcount101–250
- GTM typeB2B
- OfferingSoftware
What Definely does
Definely is a London-based legal technology company founded in 2017 by former Freshfields Magic Circle lawyers Nnamdi Emelifeonwu and Feargus MacDaeid. The company develops an AI-powered contract drafting and review suite built natively as a Microsoft Word add-in, targeting complex, high-risk transactional work at large law firms (Magic Circle, Am Law 100/200) and corporate legal departments. Its product suite comprises five modules: Definely Read (formerly Draft) for contract navigation, Definely Proof for automated proofreading, Definely Enhance for agentic AI-powered review, Definely Cascade for cross-document knock-on effect detection, and Definely Vault for AI-powered clause and precedent search across document management systems including iManage and NetDocuments.
The underlying technology combines rules-based logic, machine learning, and RAG-based generative AI with an agentic AI architecture using multiple specialized agents working under human lawyer oversight. Definely's MCP connector for Anthropic's Claude extends capabilities into third-party AI platforms. The company monetizes through enterprise SaaS subscriptions billed annually in advance, with a quote-based pricing model and a "Book a Demo" go-to-market approach for enterprise legal teams.
The company has raised approximately $40-42.5 million across multiple rounds, including a $30 million Series B led by Revaia in June 2025, a $7 million Series A led by Octopus Ventures in May 2024, a $3 million round led by Microsoft's M12 in 2021, and strategic investments from Raine Ventures, Google Ventures, and Clio Ventures, alongside a £585,000 Innovate UK grant. Definely serves 150+ enterprise customers across 30+ countries with 40,000+ active users, and has reported ARR nearly tripling in 2024 and approximately 90% revenue growth in 2025. Headcount stands at 104+ as of January 2026, with US market expansion underway following the Series B close.
Definely firmographics
Firmographics- Name
- Definely
- Legal name
- Defeyene Legal Solutions Limited
- Website
- https://definely.com
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Definely is a London-based LegalTech company offering AI-powered contract drafting, review, and proofreading tools built natively within Microsoft Word for large law firms and corporate legal departments handling complex transactions.
- Ownership category
- akta.pro rank
Definely industry classification
Industry- Product category
- Legal Technology (LegalTech Contract Review Software)
- NAICS
- Software Publishers (5132)
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Contract Lifecycle Management (CLM) & Document Automation (BPAEAPAD)
- akta.pro secondary industries
- Contract Lifecycle Management (CLM) & Document Generation/Templating (HDAEAGAL), eDiscovery, Litigation Support & Legal Hold (BPAEAPAE)
Keywords
Where Definely is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
Definely business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure, Others
Revenue model
- SaaS Subscription (Software License): Annual subscription-based software licensing model. Definely grants non-transferable, non-exclusive, limited license to install and use the software during the Licence Term. Fees are paid annually in advance per the terms of service.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | Enterprise subscription with annual billing |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels9 records
Definely product offering
Product offeringCore offering
Definely develops and sells an integrated suite of AI-powered legal contract drafting, review, and proofreading tools built natively within Microsoft Word. The suite comprises Definely Read (formerly Draft) for contract navigation and contextual review across linked documents, Proof for automated proofreading and error detection, Enhance for agentic AI-driven contract analysis and redline suggestions, Cascade for cross-document knock-on effect detection, and Vault for clause-level knowledge management and precedent search. The software is delivered to large law firms and corporate legal departments as annual SaaS subscriptions with deep integrations to iManage, NetDocuments, SharePoint, and Anthropic's Claude.
Product overview
Definely is a LegalTech company offering an integrated suite of AI-powered contract drafting and review tools built natively within Microsoft Word. The product suite comprises five core modules: Definely Read (formerly Draft) for contract navigation and editing, Definely Proof for automated proofreading, Definely Enhance for agentic AI-powered contract analysis, Definely Cascade for knock-on effect detection across related clauses, and Definely Vault for AI-powered clause library and precedent search. These tools work together within Word to help lawyers complete contract drafting, review, and negotiation workflows, with capabilities spanning definition identification, cross-reference mapping, contract consistency checking, issues list generation, and semantic precedent search. The suite is designed for complex, high-risk transactional work at major law firms and corporate legal departments.
Differentiator
Problem solved
Functional benefit
Brands
- Definely Draft (now Definely Read): Contract review and navigation tool providing instant complex contract insights, precedent gap analysis, and contextual review across multiple linked contracts without losing place in documents.
- Definely Proof
- Definely Enhance
- Definely Cascade
- Definely Vault
Products and services
- Definely Read (formerly Definely Draft) Contract review and navigation tool providing instant complex contract insights, precedent gap analysis, and contextual review across multiple linked contracts. Features double-click definitions that open in side panels, clause reference navigation, and cross-document analysis without losing place in documents. Designed for lawyers working on complex contracts in Microsoft Word.
- Definely Proof
Quantifiable outcome
- 40-70% speed improvement in contract review
- +4 more outcomes
Companies that use Definely
Customer profileNamed customers15 records
Segments4 records
Ideal customer profiles3 records
Definely technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration5 records
AI capability7 records
Feature6 records
Definely partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core.
- AsdacoreBritish supermarket chain deployed Definely's AI-powered contract review technology 'Proof' across its in-house legal team to automate document review, identify inconsistencies, and improve accuracy in complex contracts.
- AnthropiccorePartnership to integrate Definely's contract review tools into Anthropic's Claude AI via Model Context Protocol (MCP). Definely Connector available in Claude marketplace, enabling deterministic, rules-based contract review within Claude.ai, Claude Desktop, and Claude mobile.
- MicrosoftcoreDeep integration partnership with Microsoft Word for native add-in development. Additionally, Microsoft's venture fund M12 invested in Definely. Products are built natively within Microsoft Word.
- iManagecoreIntegration with iManage document management system, allowing Definely to connect with law firms' document management systems for semantic search and clause retrieval.
- NetDocumentscoreIntegration with NetDocuments document management platform, enabling connection to law firms' document management systems for knowledge access and precedent search.
Scale indicators10 records
Recent moves7 records
Expansion highlights6 records
Definely competitors and assessment
Company assessmentDirect peers
- Harvey AI: Harvey AI builds domain-specific generative AI for elite law firms and in-house legal teams, offering AI-powered legal research, drafting, and analysis. It is the most direct competitor to Definely in the Magic Circle / Am Law segment and pursues an overlapping buyer base with substantially larger funding.
- Spellbook: Spellbook is an AI contract drafting and review copilot for lawyers that integrates with Microsoft Word. It is one of Definely's closest competitors in AI-assisted contract review and redlining for transactional lawyers.
- Robin AI: Robin AI provides AI-powered contract drafting and review tools for in-house legal teams and law firms, with native Word integration. It is a directly comparable LegalTech peer competing for the same enterprise contract review buyers.
- Luminance: Luminance is a UK-based LegalTech company applying AI to contract review, analysis, and negotiation, originally spun out of the University of Cambridge. It is a direct UK-headquartered competitor serving enterprise and law firm buyers in the same category.
- Evisort: Evisort is an AI-powered contract lifecycle management and analysis platform serving corporate legal departments. It overlaps with Definely on AI-driven contract review and clause analysis for in-house legal teams.
Broad incumbents
- Ironclad: Ironclad is a leading contract lifecycle management (CLM) platform for in-house legal teams. It is broader than Definely across the full contract lifecycle but competes for the same in-house legal buyer and overlaps on AI-powered contract review.
- Icertis: Icertis is an enterprise CLM incumbent serving Fortune 500 legal and procurement teams. It is a broader incumbent in Definely's category with deeper enterprise reach but less surgical contract-drafting UX.
- Thomson Reuters CoCounsel: Thomson Reuters offers CoCounsel, an AI legal assistant combining legal research, drafting, and document review, alongside its broader legal information portfolio. It is a broad incumbent with overlapping contract review capabilities for the same enterprise buyers.
- LexisNexis Protege: LexisNexis (a RELX business) provides AI-enabled legal tools including Protege for legal AI workflows. It is a broad legal-tech incumbent with overlapping AI contract review capabilities and deep distribution into law firms.
Emerging players
- Kira Systems: Kira Systems offers AI-powered contract review and analysis for law firms and corporate legal departments. Now part of Litera, it is an emerging-to-mature peer with overlapping AI contract analysis capabilities but a different delivery model.
Market position
Strengths5 records
Competitive moat5 records
Key highlights7 records
Customer concentration
Definely social profiles
Digital presenceDefinely compliance and trust
Trust signalCompliance5 records
Definely financial estimates
Financial estimateRevenue estimate
Valuation estimate
Definely leadership team
Management profileNumber of profiles
Profiles10 records
Definely funding detail
Funding detailFunding overview
Funding rounds7 records
Investors14 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Definely M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Definely
What does Definely do?
Definely develops and sells an integrated suite of AI-powered legal contract drafting, review, and proofreading tools built natively within Microsoft Word. The suite comprises Definely Read (formerly Draft) for contract navigation and contextual review across linked documents, Proof for automated proofreading and error detection, Enhance for agentic AI-driven contract analysis and redline suggestions, Cascade for cross-document knock-on effect detection, and Vault for clause-level knowledge management and precedent search. The software is delivered to large law firms and corporate legal departments as annual SaaS subscriptions with deep integrations to iManage, NetDocuments, SharePoint, and Anthropic's Claude.
Is Definely a public or private company?
Definely is a private company. It is classified as venture growth investor backed and is currently operating.
When was Definely founded?
Definely was founded in 2017. It employs 101 to 250 people.
Where is Definely based?
Definely is headquartered in London, United Kingdom, in the Europe region.
How does Definely make money?
One revenue line is on record: saaS Subscription (Software License).
Who are Definely's main competitors?
Direct peers on record are Harvey AI, Spellbook, Robin AI, Luminance and Evisort. Broad incumbents are Ironclad, Icertis, Thomson Reuters CoCounsel and LexisNexis Protege. Kira Systems is listed as an emerging player.
Does Definely have an API?
Yes. Definely offers MCP (Model Context Protocol) integration via the Definely Connector for Claude. This enables Definely's legal AI tools to be accessed within Claude.ai, Claude Desktop, and Claude mobile applications. The connector provides deterministic, rules-based contract review capabilities including: Defined Terms (lists every capitalised or formally defined term), Undefined Terms (identifies terms used as if defined but never defined), Reference Report (maps cross-references and flags broken or circular ones), Ask From Document (Q&A about uploaded documents), Vault Search (semantic or keyword document library search), Issues List (generates drafting issues report from comments and track changes), and Proof Check (reviews clauses for errors and inconsistencies). Available via Anthropic's Claude marketplace. Requires active Definely licence (Cloud suite) and a Claude account. Developer documentation is at www.definely.com/llm-info.
What industry is Definely in?
Definely's product category is Legal Technology (LegalTech Contract Review Software). Its primary akta.pro industry code is BPAEAPAD, Contract Lifecycle Management (CLM) & Document Automation, with a secondary code of HDAEAGAL, Contract Lifecycle Management (CLM) & Document Generation/Templating. Its NAICS code is 5132 and its SIC code is 7372.