The best AI stack for law students costs $0. ChatGPT Free, Claude Free, NotebookLM, and Perplexity give you research, drafting, document analysis, and study tools without spending a dollar. Most professors allow these tools for study — not for graded assignments.

Law school is expensive enough. You don't need paid AI subscriptions to get through it. Here's exactly which free tools to use for which tasks, what professors actually allow, and the one paid tool worth the upgrade if you can swing $20/month.

#1 ChatGPT Free — The All-Purpose Study Tool

Why it's #1 for students: ChatGPT Free gives you GPT-4o-mini access, which handles legal concepts, case analysis, and study questions well. The free tier is generous enough for daily use.

Best student use cases: - Case briefing — paste a case excerpt and ask for IRAC-format analysis - Concept explanation — "Explain promissory estoppel like I'm a 1L" actually works - Exam prep — generate practice hypos for any subject - Outlining — organize your notes into structured outlines by topic - Socratic method prep — "What questions would a Contracts professor ask about Hadley v. Baxendale?"

What professors say: Most law schools now have AI policies. The consensus: ChatGPT for studying and understanding concepts is fine. Using it to write graded papers or take-home exams is academic dishonesty. Check your school's specific policy.

Limitations: Free tier has usage limits during peak hours. No file uploads on free tier. Hallucinated citations are common — never rely on ChatGPT for case law without checking.

Cost: Free.

Why it's #2: Claude's free tier gives you access to Claude Sonnet, which writes better legal prose than ChatGPT's free tier. For legal writing assignments (where professors allow AI assistance), Claude produces more polished output.

Best student use cases: - Legal writing feedback — paste your draft and ask for specific improvements - Brief structure — Claude teaches IRAC/CRAC structure through example better than any textbook - Memo drafting practice — generate sample memos and compare to yours - Argument analysis — "What are the three strongest counterarguments to this position?" - Plain language translation — turn complex statutory language into understandable English

The writing quality difference: Ask both ChatGPT and Claude to draft a motion to dismiss. Claude's output is more nuanced, better structured, and uses legal terminology more precisely. For students learning legal writing, Claude is the better model to learn from.

Limitations: Lower daily message limits than ChatGPT Free. No web search. Knowledge cutoff means recent cases aren't available.

Cost: Free.

#3 NotebookLM — The Free Document Analysis Beast

Why it's #3: NotebookLM is the most underrated free tool for law students. Upload your casebook PDFs, class notes, and outlines — then ask questions across all of them. Every answer cites your specific sources.

Best student use cases: - Exam prep — upload your entire semester's materials and quiz yourself - Case cross-referencing — "How does the holding in Palsgraf relate to the duty analysis in Tarasoff?" - Outline building — upload class notes, ask NotebookLM to organize them by topic - Audio Overviews — generates podcast-style summaries of your uploaded materials for commute studying - Reading comprehension — upload a dense case and ask targeted questions

The killer feature for students: Upload 10 cases from your syllabus. Ask NotebookLM to identify the common legal principles across all of them. It finds connections you'd miss reading individually. This is how top students prep for essay exams.

Limitations: Only answers from uploaded sources — it won't fill gaps from general knowledge. 50 notebooks, 300 sources each on the free tier. Can't help with legal concepts not in your uploaded materials.

Cost: Free (NotebookLM Plus at $7.99/month for higher limits, but free tier is enough for most students).

#4 Perplexity Free — The Research Starting Point

Why it's #4: Perplexity searches the web and synthesizes answers with citations. For finding recent legal developments, law review articles, and understanding current legal debates, it's faster than Google Scholar.

Best student use cases: - Paper research — find law review articles and academic sources on any legal topic - Current developments — "What are the latest AI regulation proposals in the EU?" - Secondary source discovery — finds treatises, practice guides, and commentary you didn't know existed - Career research — learn about practice areas, firms, and legal market trends - News monitoring — stay current on legal developments for class discussions

Important caveat: Perplexity finds web sources, not primary legal authority. It'll point you to articles about cases, not the cases themselves. Use it as a discovery tool, then verify in your school's Westlaw or Lexis access.

Limitations: Free tier limits Pro searches. Some sources are behind paywalls that Perplexity can't access. Not a substitute for Westlaw or Lexis research.

Cost: Free (Pro at $20/month for unlimited Pro searches).

Why it's #5: vLex is a legal research platform with AI features that's more accessible than Westlaw or Lexis for students. Some law schools include vLex in their database subscriptions, and the AI search features are strong.

Best student use cases: - Case law research — searches across a large international legal database - AI-powered search — natural language queries return relevant cases and statutes - Comparative law — access to legal sources from 130+ countries (useful for international law courses) - Citation analysis — see how cases have been cited and their current status

The advantage over Westlaw/Lexis for students: vLex's AI search is more intuitive for beginners. You don't need to learn boolean search operators or navigate complex database structures. Ask a question in plain English, get relevant results.

Limitations: Smaller US database than Westlaw or Lexis. Less comprehensive secondary source coverage. Not the standard for US law practice — you'll still need to learn Westlaw and Lexis.

Cost: Check if your school has access. Individual plans start around $50/month, but academic pricing is significantly discounted.

The Bottom Line: ChatGPT Free for studying, Claude Free for writing practice, NotebookLM for document analysis, Perplexity for research discovery — the $0 AI stack covers 90% of what law students need.

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.