This is the one page you bookmark. Every major legal AI tool compared side-by-side: what it actually does, what it costs, what size firm it fits, and whether it's worth the money. No fluff, no vendor spin — just the comparison you need to make a decision.

The legal AI market has exploded from a handful of tools to dozens, and most comparison articles are written by vendors or affiliates pushing a specific product. This comparison is independent. We've tested these tools, talked to firms using them, and built this chart based on what actually matters: capability, cost, and fit. If a tool doesn't appear here, it either doesn't have enough real-world adoption to evaluate or it didn't perform well enough to recommend.

General-Purpose AI: Claude, ChatGPT, Gemini

Claude Pro ($20/month): Best legal writing quality, 200K context window, strongest reasoning. Best for: drafting, analysis, document review. Firm size: any. Verdict: The default recommendation for every lawyer. Claude Team ($30/seat/month): Same as Pro plus enterprise privacy, admin controls. Best for: firms needing compliance. Verdict: Minimum tier for client work. ChatGPT Plus ($20/month): Web browsing, file uploads, custom GPTs, DALL-E. Best for: research with web access, data analysis, versatility. Firm size: any. Verdict: Best as a second tool alongside Claude. ChatGPT Team ($30/seat/month): Enterprise privacy version. Verdict: Comparable to Claude Team, slightly weaker on legal writing. Gemini Advanced ($20/month): Google integration, 1M context window. Best for: Google Workspace firms, very long documents. Verdict: Third choice behind Claude and ChatGPT for legal work.

Harvey ($80-150/user/month, enterprise only): Legal-trained AI for research, drafting, and analysis. Built on GPT-4 + legal training layer. Best for: complex analysis, BigLaw workflows. Firm size: Am Law 200+. Verdict: Best legal AI if you can get access and afford it. CoCounsel (bundled with Westlaw Edge, $200+/month): AI research assistant with verified citations. Best for: legal research, citation-heavy work. Firm size: any with Westlaw. Verdict: Essential if you already pay for Westlaw. Spellbook ($300-500/user/month): AI contract review and drafting inside Microsoft Word. Best for: transactional work, contract-heavy practices. Firm size: mid-size to large. Verdict: Best contract-specific AI tool. Lexis+ AI (bundled with Lexis+, $200+/month): AI research on LexisNexis platform. Best for: research if you're a Lexis firm. Verdict: Comparable to CoCounsel but tied to Lexis ecosystem.

Specialized Tools: Briefpoint, Clearbrief, Luminance, Gavel

Briefpoint ($89/month): Discovery response automation. Best for: litigators with regular discovery. Firm size: solo to mid-size. Verdict: Best ROI under $100/month for litigators. Clearbrief ($150-200/month): Citation verification and fact-checking for briefs. Best for: motion practice, appellate work. Firm size: any doing litigation. Verdict: Essential insurance post-Schwartz. Luminance (enterprise pricing, $1,000+/month): AI document review for due diligence and lease analysis. Best for: M&A, commercial real estate, high-volume review. Firm size: large. Verdict: Best in class for large-scale document review. Gavel ($99/month): Document automation from templates. Best for: estate planning, real estate closings, high-volume template work. Firm size: solo to mid-size. Verdict: Best affordable document automation.

Practice Management AI: Clio Duo, Smokeball, MyCase

Clio Duo (included in higher Clio tiers, $49-99/user/month): AI assistant inside Clio for drafting, summarization, time entries. Best for: firms already on Clio. Firm size: solo to mid-size. Verdict: Use it if you have Clio — don't switch to Clio just for Duo. Smokeball ($49+/user/month): Automated time tracking, document automation, practice management. Best for: small firms wanting all-in-one. Firm size: 1-10 attorneys. Verdict: Strong for PI, family law, real estate practices. MyCase ($39-79/user/month): Practice management with AI-assisted features. Best for: small firms wanting affordable case management. Firm size: 1-15 attorneys. Verdict: Good value but less AI-advanced than Clio Duo.

The Verdict Matrix: What to Buy Based on Your Firm

Solo practitioner ($40-120/month budget): Claude Pro ($20) + ChatGPT Plus ($20) + Briefpoint ($89 if litigating) or Gavel ($99 if transactional). Small firm, 2-5 attorneys ($200-500/month budget): Claude Team ($30/seat) + Clio Duo (if on Clio) + one specialized tool for your practice area. Mid-size firm, 6-25 attorneys ($1,000-3,000/month budget): Claude Team or Harvey + Westlaw with CoCounsel + Briefpoint or Spellbook depending on practice mix. Large firm, 25+ attorneys ($5,000+/month budget): Harvey + CoCounsel + Luminance (if M&A/real estate) + Spellbook (if transactional) + Clearbrief. Every tier should have Claude or ChatGPT as the baseline general-purpose tool. Everything else builds on top of that foundation.

The Bottom Line: Start with Claude Pro ($20/month) as your foundation, add one specialized tool for your practice area, and scale from there — the right stack depends on your firm size and what you actually do every day.

AI-Assisted Research. This piece was researched and written with AI assistance, reviewed and edited by Manu Ayala. For deeper takes and the perspective behind the research, follow me on LinkedIn or email me directly.