Harvey vs Spellbook vs Ironclad 2026 — Which AI Legal Platform Wins for Contract Review and CLM?
AI legal platforms head-to-head 2026. Harvey (industry-leading legal LLM, A&O / PwC, $3B valuation), Spellbook (GPT-4 contract assistant in Word, $129-249/mo), Ironclad (CLM leader, $3.2B valuation, Mastercard/Salesforce). Compare features, pricing, target firm size, and the right pick for solo, mid-market, Big Law and Fortune 500.
Verdict:Harvey, Spellbook and Ironclad serve completely different segments. Pick Harvey ($300K-1M/yr) for Big Law / Magic Circle, complex DD and M&A, global rollout and customized LLM. Pick Spellbook ($129-249/user/mo) for solo + small firms / startup legal, in-Word drafting, day-one rollout and best price-performance. Pick Ironclad ($50K-1M/yr) for CLM, internal contracting workflows and corporate legal repositories handling thousands of contracts/yr. Ideal stacks: (a) startup legal = Spellbook Solo + ChatGPT Team (~$160/mo); (b) small firm (5 lawyers) = Spellbook Team + Westlaw Precision; (c) Big Law (500 lawyers) = Harvey + Co-Counsel + Kira + Ironclad (~$3M/yr); (d) Fortune 500 in-house = Ironclad Enterprise + LawGeex + Spellbook Enterprise (~$1M/yr, -30% outside counsel spend). Always: pick by job (DD = Harvey, drafting = Spellbook, CLM = Ironclad); defend hallucinations with Westlaw/Lexis citation checks; enforce confidentiality on Enterprise tier; comply with ABA + jurisdictional rules.
Table of Contents
Harvey & Spellbook Overview
Harvey
#1 legal LLM. Allen & Overy / PwC / CMS / Macfarlanes. Custom GPT-4 fine-tune. $3B valuation.
Learn more about Harvey →Spellbook
GPT-4 contract assistant inside Word & Outlook. #1 AI tool for small firms. $129-249/user/mo.
Learn more about Spellbook →Feature & Pricing Comparison
| Feature | Harvey | Spellbook |
|---|---|---|
| Vendor | Harvey AI Inc. (US, founded 2022) | Rally Legal Inc. (Canada, founded 2020) |
| Target | Big Law (AmLaw100 / Magic Circle) | Small firms + in-house counsel |
| Pricing | $300K-1M+/yr per firm (Enterprise) | $129-249/user/mo |
| Base model | GPT-4 + custom legal fine-tune | GPT-4 / Claude (multi-model) |
| Word integration | Yes (Harvey for Word) | Best-in-class (in-Word redline) |
| Contract drafting | Excellent (First Draft) | Excellent (clause suggestions + redline) |
| M&A DD | Excellent (Harvey DD, data-room scan) | Basic only |
| Case-law research | Excellent (Westlaw / Lexis integration) | Limited (general LLM) |
| CLM | External CLM integration | External CLM integration |
| Languages | English, Spanish, German, French, Japanese (beta) | English only |
| Security | SOC 2 Type II, GDPR, ABA-aware | SOC 2 Type II, GDPR |
| Customers | A&O, PwC, CMS, Macfarlanes, Goodwin | 2,500+ small firms + startup legal |
| Onboarding time | 3-6 months (customization) | 1 day (Word add-in) |
| API | Yes (Enterprise) | Limited |
| Funding | $300M (Sequoia / Kleiner Perkins, $3B valuation) | $30M (Inovia Capital) |
Our Verdict
Our Verdict
Harvey, Spellbook and Ironclad serve completely different segments. Pick Harvey ($300K-1M/yr) for Big Law / Magic Circle, complex DD and M&A, global rollout and customized LLM. Pick Spellbook ($129-249/user/mo) for solo + small firms / startup legal, in-Word drafting, day-one rollout and best price-performance. Pick Ironclad ($50K-1M/yr) for CLM, internal contracting workflows and corporate legal repositories handling thousands of contracts/yr. Ideal stacks: (a) startup legal = Spellbook Solo + ChatGPT Team (~$160/mo); (b) small firm (5 lawyers) = Spellbook Team + Westlaw Precision; (c) Big Law (500 lawyers) = Harvey + Co-Counsel + Kira + Ironclad (~$3M/yr); (d) Fortune 500 in-house = Ironclad Enterprise + LawGeex + Spellbook Enterprise (~$1M/yr, -30% outside counsel spend). Always: pick by job (DD = Harvey, drafting = Spellbook, CLM = Ironclad); defend hallucinations with Westlaw/Lexis citation checks; enforce confidentiality on Enterprise tier; comply with ABA + jurisdictional rules.
Recommendations by Use Case
Big Law / complex M&A DD
Industry #1; A&O / PwC adopters; $3B valuation; custom legal LLM
Small firms / day-one rollout
$129-249/mo; in-Word drafting; 1-day deployment
Corporate legal / CLM
$3.2B valuation; Mastercard / Salesforce; thousands of contracts/yr
Solo lawyer
$129/mo Word add-in; -70% drafting time
Heavy case-law research
Thomson Reuters / Casetext integration
Bulk NDA review
94% accuracy beats human 85% (Stanford study)
Japanese corporate legal
Japan #1 + English-contract Spellbook; 1,000+ listed-co adopters
M&A data-room DD
Litera-owned; Big 4 / Magic Circle standard
Fortune 500 global rollout
150-country support; SOC 2 Type II
Compliance / regulation
EU AI Act / GDPR / CCPA support; full audit trail
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