Quick answer
If you're a transactional lawyer at a small or mid-size firm, start with a Microsoft Word add-in that applies your playbook: Spellbook (7-day free trial) or Gavel Exec ("free to start," no credit card), with LexCheck as another Word-based option. If you're a corporate legal team managing contracts across the business, look at platforms such as Ironclad or Luminance, which are quote-only. If you already pay for Lexis+, Westlaw, or Clio, check the contract features you may already own before you buy anything new.
On this page (11)
- What is the best AI contract review tool for a small law firm?
- Is Spellbook good for contract review?
- How does Gavel Exec compare to Spellbook?
- What about LexCheck?
- When does a firm need Ironclad, Luminance, or LawGeex instead?
- Do research platforms like Lexis+ or Clio Work review contracts too?
- Which contract review AI should I choose?
- Related guides
- FAQ
- Is any of this sponsored?
- Sources (all accessed 2026-10-14)
Everything below comes from each vendor's own pages, accessed October 14, 2026. We haven't tested these tools hands-on, and we publish no star ratings. Prices change, so confirm with the vendor.
Disclosure: Some listings on AI Tools For Law may be sponsored or include affiliate or referral links. Paid placements are always labeled "Sponsored," and payment never changes our verdicts. None of the links in this article are paid placements as of publication. Nothing here is legal advice. Check your own jurisdiction's ethics rules before using AI with client information.
What is the best AI contract review tool for a small law firm?
For most small firms, the best fit is a Word add-in that redlines against your own standards, because that's where contract work already happens. Enterprise contract platforms solve a different problem: tracking thousands of agreements across a company.
| Tool | Where it works | What the vendor emphasizes | Price on the vendor's site |
|---|---|---|---|
| Spellbook | Microsoft Word | Review, drafting, playbooks, benchmarks | Custom by number of users; 7-day free trial |
| Gavel Exec | Microsoft Word and online | Redlining with "your deal history, playbooks, and negotiation stance" | "Free to start," no credit card; paid tiers not shown on the page we checked |
| LexCheck | Microsoft Word | Redlines with explanations; builds a playbook from your template | Demo or free trial; no price shown |
| Luminance | Enterprise platform | "Contract intelligence" across Legal, Procurement, and Finance | Demo request |
| Ironclad | Enterprise CLM platform | Contract lifecycle management, AI assistant, eSignature | "Tailored quote" |
| LawGeex | Policy-based review platform | Redlines "according to your company's policies"; now promoting a GenAI platform called Superlegal | Demo request |
| Harvey | Enterprise AI platform | Contract intelligence and transactional work alongside litigation | No public pricing page found |
Is Spellbook good for contract review?
It's built for exactly that: transactional lawyers working in Word. Spellbook calls itself "the complete contract AI suite" that can "review contracts, draft agreements, and keep every position consistent across the deal." Its pricing page lists Review, Draft, Ask, Benchmarks, and Playbooks features. On security, Spellbook says "our LLM providers never learn from, train on, or store your data" (zero data retention) and lists SOC 2 Type II. There's a 7-day free trial, and pricing is custom.
How does Gavel Exec compare to Spellbook?
Both are Word-based contract review tools. The difference that shows up on the vendor pages is how you get started. Gavel describes Exec as "AI contract review and drafting software that runs inside Microsoft Word and online," built for "transactional attorneys and legal teams." It promises "2-minute setup," "free to start," and "no credit card required." Gavel even publishes its own "Gavel Exec vs Spellbook Legal" comparison page, which, like any vendor comparison, should be read as marketing.
Gavel also sells Gavel Workflows for document automation. Its published prices start at $83/month for Lite. Gavel says it has been acquired by Relativity.
What about LexCheck?
LexCheck is another Word-native option. It offers "comprehensive insights and accurate redlines for any contract, all within MS Word," with explanations of "why contract language is potentially problematic." Its playbook setup is simple: "upload your template and your preferred positions are automatically captured." The site offers both a demo and a free trial. We found no published price.
A contract AI is only as good as the playbook you give it. If your firm's positions live only in a partner's head, write them down first.
When does a firm need Ironclad, Luminance, or LawGeex instead?
When the job is managing contracts across a whole company, not just redlining one deal. These platforms are aimed at enterprises and in-house teams:
- Ironclad calls itself an "AI contract lifecycle management" platform and sells CLM, an AI assistant, and eSignature, priced by "tailored quote based on what you need today."
- Luminance describes itself as "the single source of contract intelligence" for "Legal, Procurement, Finance and every team in the enterprise."
- LawGeex "reviews and redlines contracts according to your company's policies." Its site now promotes "our new GenAI contract review platform - Superlegal."
Do research platforms like Lexis+ or Clio Work review contracts too?
Some do, so check what you already pay for. Lexis+ with Protégé says it can "draft and refine transactional agreements and contracts." Clio Work's page says it can "review contracts and extract key terms," "spot risks, missing clauses, and unusual language," and "compare drafts." vLex's Vincent page includes an "Analyze a Contract" workflow that compares clauses "with vLex's verified legal database." These aren't dedicated contract tools, but they may cover occasional contract work for a litigation-heavy firm.
Which contract review AI should I choose?
Match the tool to your volume and your workflow.
Related guides
FAQ
Can AI review contracts without a lawyer?
No tool we reviewed claims to replace attorney judgment, and you shouldn't use one that way. Treat AI redlines as a first pass that a lawyer approves.
Which AI contract review tools work in Microsoft Word?
Spellbook, Gavel Exec, and LexCheck all say they work inside Microsoft Word. Gavel Exec also works online.
Do any contract review tools publish prices?
Not for contract review on the pages we checked. Spellbook's pricing is custom, Gavel Exec is "free to start," and Ironclad, Luminance, and LawGeex take demo or quote requests. Gavel does publish prices for its separate document-automation product.
Is my client's contract used to train the AI?
It depends on the vendor. Spellbook says its LLM providers never train on or store your data. Clio says Clio Work files are processed under zero data retention agreements. Ask every vendor in writing.
Is it ethical to use AI for contract review?
ABA Formal Opinion 512 (July 2024) points lawyers to competence, confidentiality, communication, and reasonable fees when using generative AI. Check your state's rules. This isn't legal advice.
Is any of this sponsored?
Not as of publication. If that changes, the listing will be labeled "Sponsored," and payment won't change the verdict.
Sources (all accessed 2026-10-14)
- Spellbook: https://www.spellbook.com/; pricing: https://www.spellbook.com/pricing
- Gavel Exec: https://www.gavel.io/exec; Gavel pricing: https://www.gavel.io/pricing; Gavel: https://www.gavel.io/
- LexCheck: https://www.lexcheck.com/
- Luminance: https://www.luminance.com/
- Ironclad: https://ironcladapp.com/; pricing: https://ironcladapp.com/pricing/
- LawGeex: https://www.lawgeex.com/
- Harvey: https://www.harvey.ai/
- Lexis+ with Protégé: https://www.lexisnexis.com/en-us/products/lexis-plus-protege.page
- Clio Work: https://www.clio.com/work/
- Vincent by vLex: https://vlex.com/vincent-ai
- ABA, "ABA issues first ethics guidance on a lawyer's use of AI tools" (July 29, 2024): https://www.americanbar.org/news/abanews/aba-news-archives/2024/07/aba-issues-first-ethics-guidance-ai-tools/
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