Product guide · checked September 2026
What AI legal research actually costs a small firm
Both major vendors publish prices, and both stop inside the small-firm range: Lexis at three users, Westlaw at ten attorneys. You may also already have free research through your state bar.
Read on the vendors' own pages in September 2026. Where something isn't published, we say so instead of guessing.
Where the published prices stop
Thomson Reuters publishes online prices only for new customers at firms with ten attorneys or fewer. Their own words: if your firm has more than ten attorneys you need to contact sales for custom pricing, and the pricing shown online is available to new customers only.
LexisNexis's online store sells a maximum of three users. Above that, there's no published price.
🔑 So at five to ten attorneys, Westlaw's online prices still apply if you're a new customer. Lexis's don't. Above ten, you're negotiating with both. The figures below are starting prices for one attorney, so your firm's price will be different.
Westlaw, starting prices for one attorney
| Plan | Single circuit | All states plus federal |
|---|---|---|
| Westlaw Edge with AI-Assisted Research | $155.35/mo | $266.50/mo |
| Westlaw Advantage | $256.75/mo | $399.75/mo |
Those are three-year-term prices with the discount already applied. Thomson Reuters publishes 12% off for a two-year term and 18% off for three. Treat the 18% as your starting point in a negotiation and push past it.
"Single circuit" means one circuit's state and federal primary law, which is often all you need if you practice in one state.
Is CoCounsel included in Westlaw? No.
CoCounsel is a separate product line with its own tiers. Plain Westlaw Advantage at $256.75 doesn't include it.
⚠️ Thomson Reuters shows CoCounsel prices only after you fill in a form, so we haven't reproduced one. The CoCounsel Essentials page asks for a few details about your role or line of work. CoCounsel Legal, the full version, now works the same way and shows one-, two- and three-year plans. Fill it in, then run the break-even math below on the number it gives you.
You'll find confident figures for this on comparison sites. Trust the number Thomson Reuters shows you after the form over any of them.
The split matters because the two mostly do different work, with some overlap. Westlaw Advantage is research: Deep Research, Litigation Document Analyzer, Complaint Analyzer, Claims Explorer, and AI jurisdictional surveys. CoCounsel is the rest of the job: drafting inside Microsoft Word, contract and document review, summarizing large document sets, timeline assembly. The overlap is research: CoCounsel Legal now includes Deep Research too.
LexisNexis
LexisNexis sells online through a store, and that store is aimed at firms of about three attorneys or fewer. Above that you're talking to sales, same as Westlaw.
⚠️ We're not reproducing the Lexis price table here. The store shows its prices in a way we couldn't read reliably enough to republish, and a wrong number about a named vendor is worse than none. Open store.lexisnexis.com and read the table yourself. Here's what we can tell you: prices are per account rather than per seat, so three users costs less than three times one user, and one-year and three-year terms are priced separately.
Lexis+ with Protege, their AI, can't be bought online. The store tells you to call them about it. There's no published price.
The free option you may already have
🔑 Many state bars give members free legal research as a membership benefit, so you may be paying for something you already have.
- The State Bar of Texas provides free vLex Fastcase to all members.
- The Illinois State Bar Association provides completely free access, including AI case analysis with header notes. ⚠️ But Vincent, the full AI tool, is offered at a discounted subscription rather than free. That's the distinction to check with your own bar.
- The State Bar of Michigan also lists vLex Fastcase.
- vLex says it partners with more than 60 bar associations to give members access to its research tools.
Check your own bar before you price anything. Assume the free tier stops short of the full AI, and find out exactly where it stops.
Google Scholar is also free and has real case law, going back to 1950 for state appellate courts and 1923 for federal. It has no AI. It does have a "How Cited" view listing cases that cite yours, but it isn't a citator: nothing tells you whether a case is still good law. Use it for a quick look. Don't rely on it.
When a paid seat pays for itself
The cheapest real AI research seat is $155.35 a month, about $1,864 a year per attorney, for single-circuit coverage. Full national coverage is $266.50 a month, about $3,198 a year.
At a $250 hourly rate, the $155 seat pays for itself on about 37 minutes of saved time a month. The $266 seat needs just over an hour. Those are low bars, but only if that attorney actually does research regularly.
We can't do the same math here for the AI drafting layer, because Thomson Reuters shows its price only after a form. When you get that number, do this calculation on it before you agree to anything. Divide the monthly figure by your hourly rate. That tells you how many hours a month it has to save to break even, and you'll know right away whether that's realistic.
So research volume decides it, more than headcount. If you're a one or two lawyer firm doing occasional research, take the free bar benefit and stop there. The paid AI seat starts making sense when an attorney is doing real research most weeks.
If you're buying at five to twenty attorneys, get quotes from both vendors, get the bundle quoted separately from the plain plan so you can see what the AI actually costs, and start from the three-year discount instead of the list price.
Not sure which of your subscriptions are earning their keep?
The audit goes through every system you pay for, names what you're not using, and tells you when the right move is to cancel something instead of buying something.
Prices move and vendors reprice without announcing it. Everything here carries the date it was checked. If you get a quote that differs, tell us and we'll update the page.
None of this is legal advice.