Most solo and small firms need a lean AI stack: one general assistant on a business plan (Claude or ChatGPT) for drafting and summaries; one grounded legal research tool (such as Paxton, Lexis+ AI, CoCounsel or vLex) for citable research; the AI features in the practice management system you already use (such as Clio, MyCase or Smokeball); free verification tools (CourtListener and Google Scholar); and a written AI policy. Add specialist tools, such as Spellbook for contracts or EvenUp for personal injury, only when a specific workflow justifies them.
The principle: fewer tools, used well
The most common mistake we see in small firms is subscription sprawl: four overlapping AI tools, each used occasionally, none used well, and no one sure which ones are safe for client data. A lean stack with clear rules beats a long list every time.
The core stack
1. One general assistant, on a business plan
Claude or ChatGPT (or Gemini if you run on Google Workspace, Copilot if you run on Microsoft 365). Use it for first drafts, summaries, client emails, issue spotting and marketing. Choose a plan whose terms prohibit training on your data. Not sure which? Read Claude vs ChatGPT for lawyers.
2. One grounded legal research tool
For research you will cite, use a tool grounded in a legal database. Options include Paxton (our pick for many US small firms, see review), Lexis+ AI, CoCounsel (with Westlaw) and vLex’s Vincent AI. Pilot one on completed matters before committing.
3. The AI in your practice management system
If you already use Clio, MyCase, Smokeball or similar, explore the AI features you may already be paying for before adding new tools.
4. Free verification tools
CourtListener and Google Scholar let you check that a cited case exists and read it. Our free AI Citation Checker builds a verification list with links to both.
5. Specialist tools, only when justified
- Transactional work in Word: Spellbook.
- Personal injury: EvenUp, Supio or Eve.
- Litigation with heavy discovery: an eDiscovery platform such as Everlaw or DISCO.
- Document automation and intake: Gavel.
Browse the full legal AI tools directory or get a shortlist from the Tool Matcher.
What to skip
- Free or personal AI accounts for client work. Data terms are not designed for professional confidentiality.
- Tools you cannot explain to a client. If you do not understand how a tool handles data, do not use it on a matter.
- Annual contracts before a pilot. Test on real, completed work first.
The 30-day setup plan
Week 1: Foundations. List the AI tools anyone in the firm already uses. Pick your general assistant and set up business accounts. Generate a draft policy with our AI Use Policy Generator.
Week 2: Pilot. Choose three recurring tasks (for example, client letters, document summaries and research memos). Run them with AI on recently completed matters and compare the results with your own.
Week 3: Habits. Build a short prompt library for your practice (start from our 150+ prompts). Adopt a verification routine for every citation. Update your engagement letter with our Disclosure Clause Generator.
Week 4: Measure and decide. Estimate time saved, review your billing approach (see Should lawyers bill for AI time?), decide which tools to keep, and set a date to review the policy.
Get week 1 done faster with our free Law Firm AI Use Policy Template.
How to tell if it is working
Track three numbers for a month: hours saved on your pilot tasks, errors caught in review, and client feedback. If hours saved are real and errors are falling as your prompts improve, scale up. If not, narrow the use cases. Our ROI Calculator turns your estimates into a business case.
Where to go next
Take the Firm AI Readiness Assessment to see your gaps, and the free AI Competency for Lawyers course to train your team. For practice owners who want the full system, The AI Lawyer’s Toolkit 2025 covers automation for intake, drafting and follow-up.
Frequently asked questions
What is the best AI tool for a solo lawyer?
There is no single best tool. A practical start is one business-plan general assistant plus one grounded legal research tool, with free verification tools for checking citations. Choose by your main tasks and practice area.
How much should a small firm spend on AI?
It depends on tasks and seats. Start with a paid pilot for a few lawyers, measure time saved, and use an ROI estimate before rolling out. Our Legal AI ROI Calculator helps.
Do small firms need an AI policy?
Yes. ABA Formal Opinion 512 indicates lawyers with managerial authority should establish clear policies on permissible AI use. A short written policy also protects you if something goes wrong.
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This article is general educational information, not legal advice. Rules differ by jurisdiction and change often; check the primary sources and your own professional rules before relying on it.