Software advice
Best AI Contract Review Tools in 2026
AI contract review tools are software products that read a contract, flag clauses against a playbook or a standard, and suggest redlines or summaries for a lawyer or business user to accept. They are not law firms, they do not give legal advice, and their output still needs a person to approve it.
Quick answer
Legartis ranks first for rules-based review with European hosting. Genie AI is the pick when a posted price and a free plan matter, and Spellbook suits lawyers who work inside Microsoft Word.
A buyer of AI contract review picks between a review layer and a contracting platform. Review layers read incoming paper in Word, flag risks and redline against a playbook. Platforms add intake, templates, signature and a repository, and review is one feature. This ranking judges how clearly each vendor explains what its AI does, how playbooks are written and enforced, where data is hosted, whether prices are public, and how much of the product a team must buy to get review. Checked on the vendors' own sites on 27 October 2026. Every output still needs a lawyer's sign-off before a contract goes out.
The 11 best AI contract review tools in 2026, ranked
There is no score. Vendors can pay for more visibility on this website, for example a higher place in a ranking or more room on a page. Commercial relationships can also affect which products we feature and how prominently. How we rank.
| # | Tool | Best for | Free plan | Entry price |
|---|---|---|---|---|
| 1 | Legartis | European legal, procurement and sales teams wanting rule-based contract review on servers in Switzerland and Europe | No | Quoted |
| 2 | LexCheck | Legal teams negotiating in Microsoft Word who want explained flags and redlines against their own playbook | Trial | Quoted |
| 3 | Genie AI | Founders, small legal teams and individual lawyers who want to draft and review contracts with a posted price | Yes | $75 per month (Pro), or $59 per month billed annually |
| 4 | Spellbook | Law firms and in-house teams that draft and redline in a Word add-in with zero-retention model agreements | Trial | Quoted |
| 5 | Juro | Scaleup legal teams wanting AI review, templates and a repository where business users create contracts | No | Quoted |
| 6 | LegalOn | In-house teams that want attorney-built playbooks in many jurisdictions, with unlimited review usage inside a quoted plan | No | Quoted |
| 7 | Luminance | Large organizations that need portfolio-wide contract questions across legal, procurement, finance and sales | No | Quoted |
| 8 | Kira | Law firms and deal teams running high-volume due diligence and M&A document review with extraction grids | No | Quoted |
| 9 | Ironclad | Companies that want AI inside a full contract lifecycle platform with CRM, procurement and finance integrations | No | Quoted |
| 10 | Harvey | Large law firms and in-house departments that want one AI platform for research, drafting, review and agents | No | Quoted |
| 11 | SpotDraft | Legal teams that want AI review inside Microsoft Word plus a repository and eSignature in one system | No | Quoted |
- 1
Legartis
Legartis takes first place because it treats review as rules you write down and adjust, with a threshold per requirement for what passes automatically and what goes to a person. Every decision traces back to a requirement and a passage in the contract. Servers are in Switzerland and Europe, which settles the hosting question early for many European buyers. The trade-off is that no public price list exists, so budgeting starts with a sales call.
Strong on
- Per-requirement thresholds decide what the agent approves alone and what it escalates to a named owner
- Servers in Switzerland and Europe, ISO 27001 certification and GDPR compliance are stated on the homepage
- Separate workspaces for legal, sales, procurement and construction teams, each with its own templates
Weak on
- No price or plan table appeared on the pages read, so cost can only be learned through a demo
- Agentic behavior depends on playbooks being written first, which takes legal time before the first review
Skip it if: Solo practitioners who want a self-serve Word add-in with a posted monthly price and a free tier to try tonight. No price appeared on the pages read; a demo and a trial option are offered instead.
- 2
LexCheck
LexCheck sits second because it stays inside Microsoft Word and explains why a clause is flagged instead of only marking it. A playbook can be started by uploading a template, so preferred positions are captured without a long setup. Two products are named, Insights and Copilot. It ranks below Legartis only because the pages read say less about agent-style automation and European hosting, and no price is posted.
Strong on
- Redlines and flag explanations appear in Word, so reviewers do not switch to a separate portal
- A playbook can be created from an uploaded template, with fallback language editable by the team itself
- SOC 2 Type II accreditation is stated on the vendor's security page
Weak on
- Hosted on AWS with no region choice mentioned on the security page read
- The product is centered on review in Word, with no contract repository or intake workflow described
Skip it if: Teams that need intake forms, matter tracking or a signed-contract repository in the same product as review. The site offers a free trial and a demo; no price list was shown on the pages read.
- 3
Genie AI
Genie AI ranks third because it is one of the few tools here with a public price table and a free plan. Pro costs $75 per month for one user, Business $320 for five, and Enterprise starts from $600 per month with SSO, API and MCP integrations. The free plan locks exports, so a real trial of review needs a paid step. Depth for portfolio-level analysis is thinner than at enterprise vendors.
Strong on
- Public prices for Pro and Business, with a 20% discount for annual billing
- ISO 27001 certification, a stated no-training promise on customer contracts, and a DPA for business customers
- Word and Excel add-in plus a library of 500+ templates for drafting as well as review
Weak on
- Free plan keeps exports locked, so the output cannot leave the product until a plan is bought
- Enterprise-only features include SSO, API and MCP, which small teams cannot get on Pro
Skip it if: Large legal departments that need contract-portfolio analytics, workflow routing and a configured approval chain from day one. Free plan has limited AI tokens and locked exports; Business is $320 monthly for 5 users.
- 4
Spellbook
Spellbook is fourth because it is built as a Word add-in for drafting, review, comparison and playbooks, which suits lawyers who live in Word. The vendor says it has zero data retention agreements with OpenAI and Anthropic and holds SOC 2 Type II. Pricing is by seat count and quoted, so no figure can be compared here. A newer autonomous contract management product is announced as early access.
Strong on
- Word add-in covers review, drafting, benchmarks and playbooks in one place
- Zero data retention agreements with both OpenAI and Anthropic, per the vendor's security FAQ
- A 7-day free trial and free academic access for law schools
Weak on
- Seat-based quote only, with no posted price on the pricing page
- Multi-document agent work sits in a separate Associate product, not in the base add-in
Skip it if: Procurement or sales teams that want a self-serve contract workflow outside Word, with no lawyer in the loop. Price follows the number of team members on a license; a 7-day free trial exists.
- 5
Juro ranks fifth because AI review is one part of a full contracting platform rather than the whole product. All plans have unlimited users, unlimited workflows and unlimited templates, and cost follows contract volume and integrations. AI Extract, Draft and Review can be chosen separately, plus MCP access for outside LLMs. Buyers who only need a review layer will pay for platform pieces they do not use.
Strong on
- Unlimited users on every plan, so sales and HR can self-serve without seat costs
- AI Review redlines against custom playbooks, and MCP connects contracts to outside LLMs
- REST API plus Salesforce, HubSpot, Slack, Word and Docusign integrations
Weak on
- No public price, and the quote form asks for volume, contract types and integrations first
- SOC 2 Type II is stated in its trust articles, but the vendor's AI data terms were not checked
Skip it if: Law firms reviewing other parties' paper in Word, who do not need templates, workflows or a repository. Plans are built from contract volume, AI features and integrations, all with unlimited users; the price comes after a demo.
- 6
LegalOn
LegalOn lands sixth because attorney-written playbooks are its main asset: the vendor lists 135+ of them, across NDAs, MSAs and DPAs, plus international sets for 23 countries. Reviews run in Word with no usage cap on a plan. It also adds matters, a vault, translation, entity and board management, so the footprint is wider than review. Hosting is in the US, which matters for some European buyers.
Strong on
- Playbooks written by attorneys exist from day one, and managed playbooks are built for the customer
- Review, redline, search and Assistant carry no usage limits on any plan
- ISO 27001, ISO 27017 and SOC 2 Type II certifications are listed on the security page
Weak on
- Hosted in the US on AWS and Google Cloud, with no European region described
- Pricing is by quote only, and view-only licenses for business users are one of several add-on options
Skip it if: Companies that require contract data to stay in the EU, or teams that want a posted monthly price. Quote is sized by team size and modules; usage of review, redline, search and Assistant is stated as unlimited.
- 7
Luminance
Luminance comes seventh because it is aimed at enterprise-wide contract intelligence, not at a single lawyer redlining an NDA. It applies playbooks to reviews, answers questions across a portfolio, and surfaces auto-renewals and commitments for finance and sales. It was founded by Cambridge University researchers. ISO 27001 and SOC 2 Type II are listed. Smaller teams will find the scope and the sales-led buying process heavier than they need.
Strong on
- Portfolio-level questions across supplier terms, renewals and obligations, not only single-document review
- ISO 27001 and SOC 2 Type II, with AES-256 encryption and SSO, per the vendor's security page
- One workspace is pitched to legal, procurement, finance, sales and executives
Weak on
- Enterprise positioning means a sales-led purchase with no self-serve start
- The data hosting region for customer contracts was not stated on the security page read
Skip it if: Individual lawyers and teams under a handful of people who need Word-based review quickly and cheaply. No price list; enterprise deals are scoped with the vendor.
- 8
Kira
Kira takes eighth place because it is built for diligence review more than for day-to-day commercial contracts. It extracts from documents with 1,400+ pre-built smart fields, plus fields a team trains, and shows them in review grids for M&A, real estate and banking. Generative AI sits next to the trained models. It is sold by Litera, so buying often means a wider firm tooling decision.
Strong on
- 1,400+ pre-built smart fields, with the option to train your own
- Review grids organize extractions for M&A, real estate and banking projects
- Integrates with Microsoft 365 and other Litera products
Weak on
- Aimed at diligence projects rather than live negotiation of everyday sales or procurement contracts
- Price and data handling terms were not stated on the page read
Skip it if: In-house teams who mostly redline incoming vendor paper and want a playbook-first review in Word. Sold as part of Litera through demo; no price shown on the pages read.
- 9
Ironclad ranks ninth here because AI review is a layer on a contract lifecycle platform, not a stand-alone reviewer. The vendor presents an Ironclad Agent grounded in a company's commercial history, plus workflows for legal ops, procurement, sales and IT. Production servers run on US-hosted Google Cloud, with SOC 1, SOC 2 Type II and ISO 27001 listed. Teams that only want AI redlines will buy a lot of platform.
Strong on
- Workflows, approvals, signature and repository live in the same product as AI
- SOC 1, SOC 2 Type II and ISO 27001 are on the security page, with annual penetration tests
- Integrates with Salesforce, Coupa, Ramp and other business tools named on the homepage
Weak on
- Production servers are US-hosted on Google Cloud, with residency handled case by case
- Implementation effort is larger than for an add-on, and pricing is quote-only
Skip it if: Teams that just want a lightweight review assistant in Word, with no repository, workflows or CRM integrations. Pricing is by quote; the site lists a pricing page but plans are not tabled.
- 10
Harvey
Harvey sits last because contract review is one module of a broad legal platform, called Contract Intelligence, next to agents, Vault, knowledge research and intake. The site reports 3,500+ legal organizations. Data can stay in the EU or Switzerland, the US, or Australia, and no input or output is used for model training, by contract. Breadth and a demo-only sale make it a heavy pick for review alone.
Strong on
- Choice of EU or Switzerland, US or Australia data regions, stated on the security page
- Platform Agreement states that inputs, outputs and uploads are not used for model training
- Covers research, agents, Vault storage and horizon scanning beside contract review
Weak on
- No public pricing; the only route is a demo request
- Broad scope means contract review is not the center of the product
Skip it if: Small teams or individuals who need contract review at a posted monthly price. Demo and quote only; no pricing page was found on the site.
- 11
SpotDraft ranks eleventh because it is a full contract lifecycle platform where AI review is one module, and its price is hidden behind a demo. It is strong on workflow: review in Word, Slack or the app, templates, eSignatures and 30+ integrations. The homepage lists SOC 2 Type II and GDPR, and the pricing page notes ISO 27001:2022.
Strong on
- AI review works in Microsoft Word, Slack or the web app, so reviewers keep their usual editor
- Repository pulls contract metadata automatically, which helps once review volume grows
- Implementation and migration of old contracts are described as included with every plan
Weak on
- Pricing is volume based and unpublished, so small teams cannot cost it in advance
- The lifecycle scope is wider than a buyer who only wants a clause checker needs
Skip it if: A solo lawyer who only wants a standalone playbook checker and a visible monthly price. The pricing page says plans are based on contract volume and sends buyers to a demo; no figures are printed.
How these AI contract review tools were judged
How accurate is AI contract review, and how do you check it?
No vendor page read for this ranking publishes an independent accuracy figure, so accuracy is judged by design. Tools that trace each flag to a playbook rule and a passage in the contract, as Legartis describes, let a reviewer verify quickly. Tools that explain why a clause is risky, as LexCheck does, serve the same purpose. Attorney-written playbooks, such as the 135+ LegalOn lists, set the starting standard. Vendor claims of time saved are marketing figures. Test each candidate on ten of your own past contracts, including ones with known problems, and count missed clauses and false alarms before buying. A lawyer should still approve every redline.
How much does AI contract review cost?
Most vendors here quote by demo, so budgeting starts with a call. Genie AI is the exception, listing Pro at $75 per month, Business at $320 for five users and Enterprise from $600 per month, as of October 2026. Spellbook prices by number of team members, Juro by contract volume and integrations with unlimited users, and LegalOn by team size and modules. Kira, Luminance, Ironclad and Harvey sell through sales teams. Ask every vendor for the full first-year cost, including playbook setup, onboarding, any integration fees and the point at which usage limits or extra seats apply.
Where does my contract data go, and is it used for training?
The answer sits on each vendor's security page, so read it before sending any real contract. Legartis states servers in Switzerland and Europe and no sharing with third parties. Harvey offers EU or Switzerland, US and Australia regions and contractually excludes training. Spellbook cites zero data retention agreements with OpenAI and Anthropic. LegalOn and Ironclad host in the US. Luminance lists ISO 27001 and SOC 2 Type II. Where the policy was not stated on the pages read, such as Kira's, treat it as open and ask in writing, including who the model sub-processors are.
How hard is it to switch AI contract review tools later?
The sticking point is the playbook, not the contracts. Hours spent encoding positions and fallback language in one vendor's format rarely export cleanly, so ask whether playbooks can be exported and in what format. Platforms such as Ironclad and Juro hold your templates, workflows and signed repository too, which raises the cost of leaving. Word add-ins are easier to drop since the documents stay in your own files. Check the contract for notice periods, annual terms, and how long data is retained after you leave, plus whether deletion is certified.
Which AI contract review tool fits my team?
Match the tool to who touches the contract. Lawyers redlining others' paper in Word fit LexCheck, Spellbook or LegalOn. A legal team that wants sales and procurement to self-serve with guardrails fits Legartis, Juro or Ironclad. Founders and small firms who want a price list fit Genie AI. Deal teams running due diligence fit Kira, and global enterprises with large contract archives fit Luminance. Harvey suits organizations that want research, agents and review on one platform. If you handle European personal data, put hosting region before features.
How to choose an AI contract review tool in three steps
- List the contracts you review every month. Write down the five contract types that take most of your time, who receives them, and where review happens today. A team receiving vendor NDAs and DPAs in Word needs a review add-in. A team where sales drafts order forms needs templates and workflows. Counting contracts per month and the share that follow your own paper shows whether a platform or a stand-alone reviewer is the cheaper fit. Keep the list short, because every extra use case pushes you toward a platform with a bigger bill and a longer rollout than you may need.
- Run a pilot on ten of your own contracts. Ask each shortlisted vendor to review the same ten past contracts, including two with known problems and one in a second language if you need it. Record the clauses missed, the false flags and the minutes a lawyer needed to check the output. Request that the vendor load your actual playbook rather than a demo one. A pilot also reveals setup effort, which no pricing page shows. Do not accept a pilot that only uses the vendor's own sample documents, and sign an NDA before uploading anything real.
- Ask for hosting, retention and exit terms in writing. Before signing, request the data processing agreement, the sub-processor list, the hosting region and the retention period after termination. Ask whether customer contracts are ever used to train any model, and whether the AI providers behind the tool keep copies. Confirm that playbooks and extracted data can be exported. Compare answers with the security page, since gaps between the two are a warning sign. If a vendor cannot answer within a week, assume the answer is not what you want to hear.
Frequently asked questions
What is the best AI contract review tool in 2026?
Legartis ranks first in this ranking because it enforces written rules with per-requirement thresholds and states servers in Switzerland and Europe. The best choice depends on the workflow: Genie AI for a posted price, Spellbook for Word-based drafting, Kira for diligence, and Juro or Ironclad when contracting needs a full platform.
Can AI replace a lawyer for contract review?
No. The tools here flag risks and suggest redlines against a playbook, but vendors describe them as assistants, and Ironclad's site states it is not a law firm. A qualified person should approve any contract before it is sent or signed, especially on liability, indemnity and governing-law clauses.
Is there a free AI contract review tool?
Genie AI has a free plan with limited AI tokens and locked exports, as of October 2026. Spellbook offers a 7-day trial and LexCheck advertises a free trial. Most others, including Legartis, Luminance, Kira and Harvey, are sold through demos with no free tier on the pages read.
Which AI contract review tools host data in Europe?
Legartis states all servers are in Switzerland and Europe, and Harvey lists EU or Switzerland as a regional option. Luminance stores personal data of site visitors on servers in Cambridge, United Kingdom, though the hosting region for customer contracts was not stated on its security page. LegalOn and Ironclad both state US hosting.
Do AI contract review tools train on my contracts?
It varies, so read each policy. Genie AI says it never trains models on customer contracts, Harvey excludes inputs and outputs from training by contract, and LegalOn says customer data never trains third-party models. For Juro, Kira and Ironclad, the AI data terms were not stated on the pages read.
Do these tools work inside Microsoft Word?
Yes for several. LexCheck, Spellbook, LegalOn and Genie AI all describe Word integration, where redlines appear in the document. Juro and Ironclad connect to Word as one integration among many, rather than as the main workspace. Kira lists Microsoft 365 among the places where a team already works, alongside other Litera products.
How long does it take to set up a contract playbook?
Vendors give different claims. LexCheck says a playbook can start from an uploaded template in minutes, and LegalOn ships 135+ attorney-built playbooks to use on day one. Legartis and Harvey need your rules written down first. Count internal legal time for review of the draft playbook, not only vendor setup.
Should a small business buy a contract platform or a review tool?
A review tool is usually enough if contracts arrive from others and a lawyer or founder reads them. A platform such as Juro or Ironclad pays off when many people create contracts and need templates, approvals and a repository. Genie AI's posted prices make it the easiest to cost out first.