Summize
Summize is an AI-powered contract lifecycle management SaaS platform, founded in 2018 and headquartered in Manchester, UK, that serves in-house legal and business teams at mid-market and enterprise companies with AI contract review, repository, workflow and analytics embedded inside tools like Outlook, Teams, Word and Salesforce.
- Company typePrivate
- Founded2018
- HeadquartersManchester, United Kingdom
- Headcount51–100
- GTM typeB2B
- OfferingSoftware
What Summize does
Summize is an AI-powered Contract Lifecycle Management (CLM) SaaS platform founded in 2018 and headquartered in Manchester, United Kingdom. Its platform is architected as a "Contract Operations Layer" (intake, workflow, repository, analytics) topped by an "Agentic Activation Layer" of AI agents, including the SIA (Summize Intelligent Agent) and Review Pro, which delivers AI-driven redlining, redrafts, inserts and comments directly inside Microsoft Word via a native Word add-in. The product suite comprises Contract Creation Software, AI Contract Review (Review Pro), Contract Repository Software, Contract Analysis Software, and the AI Agents layer, complemented by a public multi-region REST API with regional gateways in the UK, US, UAE and Switzerland.
Summize firmographics
Firmographics- Name
- Summize
- Legal name
- Summize Ltd.
- Website
- https://summize.com
- Company type
- Private
- Founded year
- 2018
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Summize is an AI-powered contract lifecycle management SaaS platform, founded in 2018 and headquartered in Manchester, UK, that serves in-house legal and business teams at mid-market and enterprise companies with AI contract review, repository, workflow and analytics embedded inside tools like Outlook, Teams, Word and Salesforce.
- Ownership category
- akta.pro rank
Summize industry classification
Industry- Product category
- Contract Lifecycle Management Software
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (51821), Computer Systems Design and Related Services (54151)
- SIC
- Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)
- akta.pro primary industry
- Contract Lifecycle Management (CLM) & Document Generation/Templating (HDAEAGAL)
- akta.pro secondary industry
- Contract Lifecycle Management (CLM) & Document Automation (BPAEAPAD)
Keywords
Where Summize is headquartered
LocationHeadquarters
- HQ city
- Manchester
- HQ country
- United Kingdom
- HQ region
- Europe
Offices3 records
Markets served
Summize business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Infrastructure, Operations
Revenue model
- Summize CLM SaaS subscriptions: Recurring subscription revenue under per-seat/per-user SaaS licensing, organised into three roles/tiers (Requestor, Collaborator, Power User) with custom quote-based pricing tied to user count and required features. Contracts auto-renew in 12-month terms with capped annual price increases, generating over 100% ARR growth in each of the five most recent years and 97% ARR growth in H2 2025.
- Implementation, customer success and enterprise CLM services: Implementation services and customer success engagements bundled with enterprise deployments, including migration of existing contracts and ongoing premium support delivered by Customer Success and a global services organisation expanded via the InnoLaw Group acquisition.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Per seat | Annual | Requestor: limited access tier for infrequent users (e.g. sales) submitting unlimited contract requests via front-door integrations. |
| Per seat | Annual | Collaborator: partial access tier for commercial users managing signed contracts, with repository and eSignature access. |
| Per seat | Annual | Power User: full-access tier for legal and senior stakeholders with full admin rights and advanced AI features. |
Go-to-market motion1 record
Distribution channels5 records
Marketing channels10 records
Summize product offering
Product offeringCore offering
Summize provides an AI-powered Contract Lifecycle Management (CLM) SaaS platform that lets in-house legal and business teams create, review, redline, store and analyse contracts without leaving the tools they already use. The platform is delivered as a Contract Operations Layer topped by an Agentic Activation Layer of AI agents (including Review Pro and SIA) and is embedded natively into Microsoft Outlook, Teams, Word, HubSpot, Slack, Salesforce, Gmail, DocuSign and Jira. A public multi-region REST API (UK, US, UAE, Switzerland) and implementation/legal-operations services support both mid-market and enterprise customers.
Product overview
Summize is an AI-powered Contract Lifecycle Management (CLM) platform built for in-house legal teams and the wider business. It is delivered as a single unified platform architected as a "Contract Operations Layer" topped by an "Agentic Activation Layer" of AI agents (including SIA and Review Pro). The platform's portfolio consists of: the core Summize CLM platform; the Contract Creation Software module; the Review Pro (AI Contract Review) module operating inside Microsoft Word; the Contract Repository Software module; the Contract Analysis Software module; and the AI Agents layer (Agentic Activation / SIA) that delivers contract intelligence into tools like Outlook, Teams, Word, Slack, HubSpot, Salesforce and Gmail. The portfolio is complemented by a public Summize REST API (with regional developer portals) that exposes contract data, requests, documents and clause management for custom integrations. Together these products cover the full contract lifecycle — request, review, repository, analytics — with embedded AI embedded throughout.
Differentiator
Problem solved
Functional benefit
Products and services
- Summize Contract Lifecycle Management Platform Core AI-powered CLM SaaS platform architected as a Contract Operations Layer topped by an Agentic Activation Layer. Embedded inside Outlook, Teams, Word, Slack, HubSpot, Salesforce, Gmail, DocuSign and Jira, it transforms contract data into actionable business intelligence for in-house legal teams and business stakeholders, covering request, review, repository and analytics across the full contract lifecycle.
- Summize REST API and Developer Portal Public REST API and developer portal allowing developers and integration partners to embed Summize into their own systems. Supports creating requests, uploading documents, managing tasks and tracking statuses, with regional developer portals and gateways in the UK, US, UAE and Switzerland, plus Swagger schemas and Postman reference and workflow collections.
- Review Pro (AI Contract Review) AI-powered contract review module that reviews, analyses, redlines and redrafts contracts directly within Microsoft Word, guided by user-defined legal standards and playbooks to deliver expert-quality outputs at speed.
- AI Agents (Agentic Activation Layer / SIA) Agentic activation layer of the Summize platform featuring AI agents, including the Summize Intelligent Agent (SIA), that surface key contract details (status, renewal dates, clauses), run research, compare clauses, identify risks, access internal policies and query contract data from within existing tools.
Quantifiable outcome
- Five consecutive years of more than 100% ARR growth, with 92% customer bookings growth and 97% ARR growth year-over-year in H2 2025.
- +5 more outcomes
Companies that use Summize
Customer profileNamed customers12 records
Segments7 records
Ideal customer profiles3 records
Summize technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration9 records
AI capability8 records
Feature6 records
Summize partnerships and signals
Strategic signalPartnerships
17 partnerships are on record, tiered strategic / flagship integration capability, flagship integration, core integration, supporting integration, supporting infrastructure provider, supporting infrastructure / analytics partner, supporting marketing analytics partner, supporting gtm partner, supporting gtm partners and supporting ecosystem partner.
- InnoLaw Groupstrategic / flagship integration capabilitySummize acquired the assets and key personnel of Seattle-based contract lifecycle management consultancy InnoLaw Group shortly after its $50m funding round. The deal brought InnoLaw's legal operations and CLM implementation expertise in-house, expanding Summize's expert bench from five to around 20 staff. InnoLaw Chief Client Officer Lara Trope leads the implementation function at Summize; CEO Lucy Bassli did not join.
- Microsoft Outlookflagship integrationNative Summize integration with Outlook enables users to create contract requests, store documents and track status directly from email, highlighted as a popular integration on the Summize website and described as a 'game-changer' by customers.
- Microsoft Teamsflagship integrationNative Summize integration with Microsoft Teams enables contract creation, requests and tracking directly from Teams chats, cited as a major driver of adoption among sales and HR users.
- Microsoft Wordflagship integrationNative Summize add-in for Microsoft Word delivers AI-powered contract review (Review Pro), redlining, inserts and comments directly inside Word documents.
- HubSpotcore integrationSummize integrates with HubSpot so users can create and manage contracts directly from HubSpot without switching tools; HubSpot is also used in Summize's analytics/marketing stack.
- Slackcore integrationSummize integrates with Slack for self-service contract creation, including NDAs and trial agreements; cited by Thought Machine as the primary channel for trial-agreement generation (over 250 NDAs generated).
- Salesforcecore integrationSummize integrates with Salesforce so sales teams can initiate contract requests and track negotiations directly within Salesforce; referenced as part of Matillion's deployment stack.
- Gmailcore integrationSummize offers a Gmail integration as part of its email-stack coverage alongside Outlook, enabling contract requests and storage directly from the inbox.
- DocuSigncore integrationDocuSign is offered as an eSignature integration within Summize, supporting the end-to-end contract lifecycle from creation to signature.
- Jirasupporting integrationListed as a 'front-door integration' available to Requestor-tier users alongside Outlook, Teams, Slack and Salesforce for submitting and tracking contract requests.
- CloudFlaresupporting infrastructure providerCloudFlare is listed as a provider of essential cookies used to deliver the Summize website and platform securely.
- Google (Analytics, Tag Manager, reCAPTCHA, Ads)supporting infrastructure / analytics partnerGoogle Analytics, Google Tag Manager, Google reCAPTCHA and Google Ads are used on the Summize site for performance measurement, security and paid acquisition; Summize's API usage complies with the Google API Services User Data Policy.
- Microsoft Advertising (Bing) and Microsoft Claritysupporting marketing analytics partnerMicrosoft Clarity is used for performance/UX analytics on the Summize website and Microsoft Advertising for paid search campaigns.
- ZoomInfosupporting gtm partnerZoomInfo provides business contact data that Summize uses for B2B sales and marketing outreach, with opt-out controls described in the privacy policy.
- Meta and LinkedInsupporting gtm partnerMeta (Facebook) and LinkedIn are used both for paid advertising/retargeting and for social-media widgets and engagement on the Summize website.
- StackAdapt, Reddit, Chili Piper, Leadfeeder, Gartner Digital Marketssupporting gtm partnersStackAdapt, Reddit, Chili Piper, Leadfeeder and Gartner Digital Markets are used for programmatic advertising, social ads, scheduling, lead intelligence and peer-review listings.
- Greater Manchester Business Growth Hub (ASCEND programme)supporting ecosystem partnerSummize's CEO participated in a Greater Manchester Business Growth Hub event alongside other regional leaders to discuss international expansion, leveraging public-sector support programmes such as ASCEND.
Scale indicators10 records
Recent moves6 records
Expansion highlights7 records
Summize competitors and assessment
Company assessmentDirect peers
- Ironclad: AI-powered CLM platform founded in 2014, serving in-house legal teams with contract creation, review, repository and analytics workflows. Closest direct competitor to Summize in the AI-native mid-market and enterprise CLM segment with similar product breadth and embedded integration strategy.
- Icertis: Enterprise-focused CLM platform with deep SAP, Microsoft and Salesforce integrations, widely considered the category leader for large global enterprises. Comparable to Summize across the contract lifecycle, but operating at a significantly larger scale and with a stronger enterprise procurement footprint.
- Agiloft: Highly configurable CLM platform serving legal, sales and procurement teams, with a recent focus on AI-driven contract review. Directly comparable to Summize in target buyer (in-house legal), product scope and emphasis on workflow configurability.
- LinkSquares: AI-first CLM platform for in-house legal teams, with signature-based contract analysis and a modern repository. Closely comparable to Summize in buyer persona, AI-led positioning and mid-market/enterprise go-to-market motion.
- ContractWorks: Cloud-based CLM platform focused on contract repository, workflows and AI-assisted review for mid-market and enterprise legal teams. Direct competitor to Summize in the mid-market contract repository and review segment, though with a less differentiated AI roadmap.
Broad incumbents
- DocuSign CLM (formerly SpringCM): CLM offering from DocuSign, the dominant e-signature vendor, bundling contract repository, workflow and AI capabilities. Competes with Summize for the same legal and sales buyers, with the advantage of an installed DocuSign eSignature base and the risk of overlap with DocuSign's own AI roadmap.
- Conga (CLM): Established CLM and document automation suite with Salesforce-native roots, now extending into AI-driven contract review. Comparable to Summize on CLM workflow and Salesforce integration, with a broader document-automation portfolio.
- Onit (OnitX / Precedent): Enterprise legal operations and CLM platform with strong presence in legal spend management and contract management. Comparable buyer base (in-house legal and GCs) and an enterprise-led GTM that overlaps with Summize's enterprise push.
Emerging players
- Evisort: AI-native contract intelligence and CLM platform focused on document extraction, analytics and workflow. Comparable to Summize on the AI/analytics layer and overlapping on the repository use case, but lighter on embedded productivity-tool integrations.
- Lexion: AI contract management platform for in-house legal teams with deep Microsoft Word and Outlook integrations. Highly comparable to Summize on the AI contract review experience and Microsoft 365 surface, representing a direct threat in mid-market deals.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Summize social profiles
Digital presenceSummize compliance and trust
Trust signalCompliance1 record
Summize financial estimates
Financial estimateRevenue estimate
Valuation estimate
Summize leadership team
Management profileNumber of profiles
Profiles5 records
Summize subsidiaries and ownership
Company hierarchySubsidiaries1 record
Summize funding detail
Funding detailFunding overview
Funding rounds3 records
Investors5 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Summize M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Summize
What does Summize do?
Summize provides an AI-powered Contract Lifecycle Management (CLM) SaaS platform that lets in-house legal and business teams create, review, redline, store and analyse contracts without leaving the tools they already use. The platform is delivered as a Contract Operations Layer topped by an Agentic Activation Layer of AI agents (including Review Pro and SIA) and is embedded natively into Microsoft Outlook, Teams, Word, HubSpot, Slack, Salesforce, Gmail, DocuSign and Jira. A public multi-region REST API (UK, US, UAE, Switzerland) and implementation/legal-operations services support both mid-market and enterprise customers.
Is Summize a public or private company?
Summize is a private company. It is classified as venture growth investor backed and is currently operating.
When was Summize founded?
Summize was founded in 2018. It employs 51 to 100 people.
Where is Summize based?
Summize is headquartered in Manchester, United Kingdom, in the Europe region.
How does Summize make money?
Two revenue lines are on record. Summize CLM SaaS subscriptions are the primary driver. The others are implementation, customer success and enterprise CLM services.
Who are Summize's main competitors?
Direct peers on record are Ironclad, Icertis, Agiloft, LinkSquares and ContractWorks. Broad incumbents are DocuSign CLM (formerly SpringCM), Conga (CLM) and Onit (OnitX / Precedent). Emerging players are Evisort and Lexion.
Does Summize have an API?
Yes. Summize offers a public REST API for partners and developers, accessible via regional developer portals (Switzerland, UAE, UK, US). The API uses API Key authentication via an Ocp-Apim-Subscription-Key header. Developers can use the API to retrieve and manage contract data (documents, custom fields, calendar events, tasks, relationships, parties, e-signature status), integrate with third-party systems, automate contract workflows (Ask Legal, Create, Review, Repository requests including new-version flows), list and filter requests/repository documents, and access clause manager/contract types. APIs are organised as REST endpoints following predictable resource structures, are designed for high availability and scalability, and built with enterprise-grade security. Postman reference and workflow collections are published. Base URLs include https://api-gateway.summize.com/api (UK), https://api-gateway-us.summize.com/api (US), https://api-gateway-uae.summize.com/api (UAE), and https://api-gateway-ch.summize.com/api (Switzerland). Developer documentation is at api-portal.summize.com.
What industry is Summize in?
Summize's product category is Contract Lifecycle Management Software. Its primary akta.pro industry code is HDAEAGAL, Contract Lifecycle Management (CLM) & Document Generation/Templating, with a secondary code of BPAEAPAD, Contract Lifecycle Management (CLM) & Document Automation. Its NAICS code is 51821 and its SIC code is 7372.