Leah vs Summize: how they compare in 2026

Leah sells AI agents and an orchestration layer that sit on top of a contract lifecycle platform, and that platform works without them. The vendor describes it the other way round. It says other vendors bolted AI onto systems built for manual workflows, while Leah was designed from scratch with orchestration as the foundation. ContractPod Technologies has sold contract lifecycle management since 2012. Leah launched in March 2023 as an AI services hub within that platform, went standalone in May 2023, and Leah Intelligence followed in October 2024. Without the agents, the product is still a working CLM with guided intake, approval routing, DocuSign and Adobe Sign execution and a contract repository. That CLM has its own market and its own Gartner category placement. The orchestration layer on top is model driven.

Summize describes its product as three layers, and only the third is AI. A Knowledge Layer holds playbooks and policies. A Contract Operations Layer runs the lifecycle from first request to signature inside existing tools. The agentic AI layer, SIA, is described as surfacing that knowledge as instant answers. Without SIA, a working contract request, repository and operations system remains, embedded in Outlook, Teams, Slack and Salesforce. Summize presents the layers as distinct, each one powering the next.

Leah returns to accuracy repeatedly in its materials, and the AI governance page says every action is measured against benchmarks for accuracy, bias and outcome. Neither that page nor the home page publishes a result from that measurement. They give no accuracy figure, no error or hallucination rate, no description of any benchmark or test set and no published evaluation. The product material describes a legal helpdesk that answers contract questions with sources attached, so a user can in principle check an answer against its source. Neither page says what the system does when the customer's own contracts do not support a position.

SIA is described as giving instant, reliable answers grounded in the customer's own knowledge and standards. That identifies the grounding source as the Knowledge Layer of playbooks and policies, but no retrieval method is described behind it. The security page says Summize evaluates the effectiveness, quality and security of its AI models on a consistent basis. No result, test set, cadence or scope is published for those evaluations. Summize publishes no accuracy figure. Its materials do not discuss hallucination or name a failure mode, and the published performance figures all measure speed and volume rather than correctness.

Leah's dedicated AI governance page sets out a three stage control loop. In the first stage, policy in, the customer defines which agents may act, on which data, within which thresholds and where escalation is required. Those policies are held as configuration rather than code. In the second, execution governed, every agent action runs through those policies in real time. Approvals, escalations and rejections are applied automatically, and the orchestrator enforces guardrails at each step. In the third, audit out, every decision is logged with the rationale, what the agent did, why, under which policy, on what data and to what outcome. The records are described as tamper resistant and immutable. The loop sets the thresholds, the review points and the route back to human judgment. Leah's home page puts the position in one line, that the workflow runs itself while the judgment stays human. The page does not say what happens after an output is found to be wrong. Default modes are not described, because the customer configures the guardrails rather than receiving them preset.

Summize says the business becomes more self sufficient while legal remains in full control. It says questions that used to reach legal's inbox are answered instantly by the people who needed them. Its materials do not say what SIA answers alone and what a lawyer approves, and they state no threshold. No review screen is described, and nothing covers what happens when an answer is wrong. Apart from the line that legal remains in full control, Summize describes no oversight arrangement.

Leah publishes qualitative quotes from four named people. Noelle Perkins is EVP and Chief Legal Officer at Cushman and Wakefield, and Lidia Kamleh is Chief Legal Officer at Dubai Future Foundation. Frances Bain-Cumberbatch is Chief Legal and External Affairs Officer at Ansa McAL, and Zillia Knight is Senior Legal Officer at Terumo Europe. Three results are published with the customer unnamed. A major American logistics company cut contract review time by 91 percent. A global manufacturer protected more than $18 million of revenue, and an American retail REIT tracked more than $2 million of savings. About 54 enterprise logos appear, including Philips, MUFG, Sandoz, Pernod Ricard, Alaska Airlines and Wood PLC. PwC and KPMG appear among them. PwC entered a commercial alliance in March 2024, and Epiq resells Leah in its Service Cloud. Integreon is quoted as an early adopter that resells it, and Pinsent Masons adopted it for managed legal services in July 2025. Partners and customers are shown together without distinction, and the Chief Product Officer of Execo, another services partner, is among the testimonials.

Three named customers give attributed quotes. Steven McGeagh at Huel speaks to ease of adoption, Julia Trius at Edpuzzle to receiving agreements already in the required format, and Derek Ihnen at Boon Edam to reduced review time. Customer logos include Revolut, SeatGeek, Miami Heat, Matillion, Sigma Computing, CodeRabbit, KSE and IPC Systems. Summize cites three times faster contract creation, a 40 percent reduction in deal length, a 50 percent reduction in processing time and six times more contracts reviewed. It puts an NDA at two minutes against two hours. A 4,062 percent ROI is attributed to Nucleus Research, a named analyst firm. None of these figures is tied to a named customer or dated. Huel, Edpuzzle and Boon Edam each also have a case study page.

Leah says customer contract data is never used to train models. The AI governance page treats data leaking into models the customer does not own as a failure it engineered out. It says zero data retention is the only acceptable answer, and that Leah enforces zero retention with OpenAI and Anthropic so they process data but never store it. Encryption is AES-256 at rest and TLS in transit, with keys in Azure Key Vault, rotated and reachable only through controlled service accounts. Role based access control is said to apply at every layer, and single tenant deployment is offered for customers with strict isolation needs. Leah sells to Fortune 500 legal departments, and none of this material addresses privilege or work product.

Under clause 6.1 of the SaaS terms, Summize may store, transmit and process Customer Data only as needed to provide the services, and gets no other rights in it. Clause 6.2 requires physical, technical and organizational measures in line with good industry practice. Clause 6.5 imposes confidentiality with named exceptions. Clause 6.6 requires daily encrypted backups available to the customer on request, and clause 9.2 requires prompt deletion or return of all Customer Data at the customer's choice on termination. Summize says prompts, completions, embeddings and training data are exclusive to each customer and not available to OpenAI or used to improve OpenAI models. Clause 6.4 reserves the right to use Customer Data in aggregated, anonymized form to improve the software through machine learning, so the agreement permits training. Separation between customers is described as siloed AI, without detail on how it is enforced. Summize's published materials do not address privilege or work product.

Leah publishes nothing on the line between a tool and legal advice. Its site carries no disclaimer of any kind and no ethics or professional responsibility page, and it names no bar or ethics guidance, including ABA Formal Opinion 512. The platform is sold to run legal work end to end across legal, procurement and finance teams. In the vendor's own framing, agents carry out commercial work in several steps without routing every decision through a person.

Summize markets contract answers to people who are not lawyers, in sales, finance, HR and procurement teams. It says questions that used to reach legal's inbox are taken care of, giving the examples of a salesperson checking renewal terms and a CFO querying payment performance without involving legal. Its materials do not say what the output is and is not, and no disclaimer separates information from legal advice. There is no competence or supervision language, and no jurisdiction limit is stated, although customers are in the UK and the US. The SaaS terms contain warranties, indemnities and liability caps but no provision on legal advice. The website terms of use disclaim only the website. The marketing line that legal remains in full control describes workflow, not advice.

A dedicated AI governance page names six failure modes the vendor says it engineered out. They include black box decisions that cannot be defended to a regulator or board, and compliance frameworks retrofitted after the fact. Against them the page sets three pillars and a loop of policy, execution and audit. Each action is logged with its rationale and governing policy, in records described as tamper resistant and immutable. The page also says every action is measured against benchmarks for accuracy, bias and outcome, and that accountability is structural rather than aspirational. It names no person or role accountable for model behavior and describes no testing before release. It gives no benchmark method or schedule and discloses no bias measurement result.

The security page sets out four AI commitments, each in one sentence: siloed AI practices, regular assessments of effectiveness, quality and security, ongoing updates to AI capabilities, and a customer feedback loop. No one at Summize is named as accountable for AI outcomes. No testing regime before release is described, and no assessment result is published. Nothing addresses bias or uneven output across contract types or counterparties. The company's General Counsel has written an explainer on the EU AI Act, which comments on the regulation rather than describing Summize's own governance. ISO 27001 is an information security standard and does not cover AI governance.

The AI governance page describes TLS in transit and AES-256 at rest. Encryption keys are managed in Azure Key Vault, rotated regularly and reachable only through tightly controlled service accounts. The page also lists multifactor authentication, secure API gateways, network segmentation, real time monitoring and a documented incident response plan. Audit logs are described as comprehensive, tamper resistant and immutable. For outside assurance, the vendor says an independent Managed Security Service Provider audits it every year and that it is penetration tested regularly.

On termination, clause 9.2 of the SaaS terms requires Summize to promptly delete or return all Customer Data at the customer's option. Retention after that is allowed only where law requires, and confidentiality obligations continue over anything retained. Clause 6.6 requires backups no less frequently than daily, secure and encrypted, in a commonly used machine readable format and available to the customer on request. Access control rests on ISO 27001, with DevSecOps practices and internal password, equipment and data confidentiality policies described. Clause 3.2 gives an annual audit right over user and password compliance. Summize states that it runs regular third party penetration testing. The agreement sets no retention period for the term itself, only for its end. No subprocessor list is published. Clause 8.4 refers to Appendix 3 as defining Sub-Processors, but the appendix is not included in the published document.

Section 16.5 of the Master Terms and Annexes sets a General Cap equal to fees paid or payable in the twelve months before the first incident. An Enhanced Cap of three times that applies to breaches of its security or data protection terms, meaning the security clause and the data processing addendum. Indemnities, intellectual property claims, breach of confidentiality and anything that cannot legally be limited are uncapped. Section 17.1 gives the customer an indemnity against third party intellectual property claims. Section 8.2 warrants that the service will perform materially as documented, with a thirty day fix period under 8.3 and termination with a refund if the fix fails. Annex A publishes uptime tiers of 99.00, 99.5 and 99.9 percent by support plan. A tier missed in three consecutive months, or in four months out of six, allows termination with a refund. Three limits apply. Breaches of confidentiality involving Customer Data fall outside the uncapped claim, so they stay capped and rise to the Enhanced Cap only where the security or data protection terms are also breached. The agreement gives no indemnity for AI output, such as inaccurate output, hallucination or training data provenance. Section 9.2 bars the customer from submitting Sensitive Data, including GDPR Article 9 categories, and the provider disclaims liability for it. These terms are version 3.0c. Version 4.0, dated 4 January 2026, changes only the trading name, according to the vendor.

The SaaS terms give the customer an intellectual property infringement indemnity in clause 7.2, covering claims, liabilities, losses, damages and reasonable costs. Clause 7.3 sets one named carve out, for unapproved combinations. Under clause 7.4, which sets out how claims are handled, Summize may not settle without unconditionally releasing the customer. Each liability cap is the greater of a fixed sum or a multiple of charges, so the fixed sum sets a minimum. Clause 8.3 caps general liability at the greater of £100,000 or 150 percent of total charges. Clause 8.2 sets a separate, higher cap for breach of the security and data protection obligations, at the greater of £500,000 or 500 percent of total charges. Clause 8.1 preserves liability for willful misconduct, and clause 8.4 makes Summize liable for its subcontractors and subprocessors as for itself. Clause 3.6 warrants that the software meets its specification in all material respects and is free of material errors and defects. Clause 3.5 requires reasonable skill and care, clause 3.8 warrants against malicious code, and clause 7.1 warrants that Summize holds the rights to supply the service. The agreement does not disclaim output accuracy, and Summize publishes no insurance position.

Leah names its integrations and describes each by function. They cover ERP platforms including SAP and NetSuite, procurement systems including Coupa, financial systems, identity providers including Okta, and existing contract lifecycle tools. DocuSign and Adobe Sign are built in for signing, and a Microsoft Word add in handles redlining. The vendor also describes how the integrations work. It says Leah connects and executes rather than copying data passively, and carries out work across connected systems through the orchestration layer. Leah has a dedicated integrations page, but publishes nothing on what syncs in which direction or what a customer must configure. No document management integration such as iManage or NetDocuments appears, which fits a product built for in house teams rather than law firms.

Summize works inside Outlook, Microsoft Teams, Slack, Gmail, Microsoft Word, Salesforce, HubSpot and Jira. It adds Summize Sign for e signature and a Claude integration, and each integration has its own dedicated page. The examples given are a salesperson checking renewal terms inside Salesforce and a CFO querying payment performance across the supplier base. Contract context and assistance are available in the tool, without a new login to manage. Summize says there is no separate platform to adopt. Implementation runs in sprints of three to four weeks under a methodology Summize calls HERO, with in house implementation staff. A full rollout typically completes within twelve weeks.

The standard deployment is shared. Single tenant deployment is available for customers with strict isolation requirements. The vendor also offers what it calls a dedicated zero trust private environment in Azure OpenAI Studio, described as fully isolating data from all other customers. Leah runs on Azure, with keys held in Azure Key Vault. On data residency the vendor says only that it supports the residency and regulatory needs typical of large multinational enterprises. It names no region or jurisdiction and describes no customer choice.

On its home page Summize says data never leaves the customer's environment, and its FAQ says the platform is built on Azure enterprise infrastructure. That names the infrastructure provider, but no region is given and nothing says where customer contract data is stored. The only published hosting location is in the website terms of use, which say the Website is hosted on servers in the United Kingdom. That covers the marketing site, not the software. Summize does not say whether the platform is single tenant or multitenant. Siloed AI, as Summize describes it, covers how prompts and embeddings are handled rather than a tenancy model.

The AI governance page claims SOC 1 Type I and II, SOC 2 Type I and II, GDPR compliance, CCPA compliance, HIPAA readiness and ISO 27001 alignment. The home page FAQ, on the same site, says only that Leah is SOC 2 Type II certified, so the two pages disagree on what is held. For ISO 27001 and HIPAA the governance page says aligned and ready rather than certified. The auditor is described only as an independent Managed Security Service Provider, a category rather than a named firm. No coverage period, report date or audit scope is given. Penetration testing is said to be regular, with no partner named and no summary published. Leah has no trust center or portal, so there is no published route to request a report.

Summize holds ISO 27001 certification, and its badge names ISOQAR as the certification body and UKAS as the accrediting body. No certificate number, scope, statement of applicability, or issue and expiry dates are published, and there is no trust portal or route to a report. Penetration testing is described as regular and third party, with no firm or dates named. A security whitepaper by CTO Richard Somerfield is offered behind a form. Summize does not hold SOC 2. It says it audits infrastructure in line with standards including SOC II and intends to work toward SOC II accreditation.

The DPA Setup Page lists four model providers against Leah Functionality, each noted as storing or retaining no customer data and each with named jurisdictions. Anthropic PBC is listed for the USA, Japan, and the EU or UK, and OpenAI LLC for the USA, Japan, and the EU or Switzerland. Cohere Inc. is listed for Canada, the USA, the EU or UK, and Japan. Google AI/ML with Google Cloud is listed for the USA, Japan, and the EU, Switzerland or UK. Microsoft Azure Services is listed for hosting and translation, and the private deployment option runs in Azure OpenAI Studio. DPA clause 4.3 requires any new subprocessor to be added to the published list with at least thirty days' notice before it processes customer personal data. Clause 4.4 gives a thirty day objection right on reasonable data protection grounds. If the objection is not resolved, the affected order can be terminated with a refund of prepaid unused fees. No model or version is named for any provider. The platform is described as choosing among several language models for each task and letting customers extend or customize models. Nothing published shows which provider handled a given piece of work.

The security page names OpenAI and states that customer prompts, completions, embeddings and training data are not available to OpenAI or used to improve OpenAI models. The FAQ adds that SIA is built on Azure enterprise infrastructure. No specific model or version is named, and Summize publishes no commitment to notify customers when a model or provider changes. No subprocessor register is published. Appendix 3, cited in the agreement as defining Sub-Processors, does not appear in the published text.

Leah publishes no pricing at any level, including the unit of charge. The primary navigation covers platform, solutions, resources and company, and neither it nor the footer sitemap has a pricing page. There is no tier structure, no unit per seat, contract or agent, no volume banding and no indication of what implementation adds. Every call to action across the site is to request a demo. An implementation FAQ says timelines vary with scope and integrations and that a detailed plan is built during evaluation. It says nothing about cost. No published page gives a view of price before a sales process.

Summize sets out its pricing structure in its published SaaS terms, and its site has no pricing page. The terms define the Order Form as setting out user numbers and the type of software license, so the charge is per user by license type. The initial term renews automatically for twelve month periods unless 90 days' written notice is given. Clause 2.2(b) limits any renewal increase to 10 percent over the previous twelve month term for the same plan, tier and package, unless a higher cap is agreed. Payment is due 30 days from a valid invoice. Fees exclude VAT and sales tax but include other taxes, and expenses need prior written approval. No figure, band, tier name or feature split is published.

Leah publishes dedicated industry pages for CPG and manufacturing, energy and utilities, financial services, healthcare, and pharma and medical devices. It describes its customers as Fortune 500 enterprises in regulated industries. By function it publishes pages for legal leadership, legal operations, sales and revenue, procurement, and finance. The pages carry distinct propositions written for the General Counsel, the contract operations team, the Chief Procurement Officer and the finance leader. The customer roster spans banking, airlines, pharmaceuticals, consumer goods and engineering. No published page says which practice areas, contract types or matters the platform does not support, and none addresses smaller organizations. Law firms appear only indirectly, through managed service partners, rather than as a served segment.

Summize has a dedicated page for each of five buying teams (Legal, Sales, Finance, HR and Procurement) and for each of eight sectors. The sectors are Software, Sports, Finance, Manufacturing, Business Services, Media and Internet, Retail and Telecommunications. Four use cases are published as request, review, repository and analytics. NDAs are named as a specific contract type with a stated handling time. The buyer is a corporate in house function rather than a law firm, and law firms are neither claimed nor excluded. No organization size is stated, and no contract types beyond NDAs are listed as supported. Government use is not addressed, and nothing says where the product stops.