Two law firms buy the same contract AI this quarter. A year later, one of them is billing the same clients less for the same drafting. The other has lost the drafting altogether, to clients who now run it in-house and call only when something breaks.
Both partnerships buy a tool to cut what the work costs to produce. The purchase leaves the harder question alone: can a client get this finished work without us?
Both firms bought the same tool. A year later one was billing less and the other had lost the work entirely.
Which legal practices came out replaced
We swept every legal practice we could name and attached a company to a practice only when it sells the work that practice bills for. Each of those calls is a judgment, so The AI Exposure Index: Law publishes them practice by practice with a source link on each, and you can check the call against the company. The sweep found 151 funded companies competing for legal work.
Each practice carries one of three verdicts. A practice is replaced when a client can get that deliverable without a firm at all. It is repriced when the client still needs a lawyer to run the AI and check its work, so the firm keeps the matter and bills fewer hours for it. It is defensible when the billed work has no AI substitute and only the preparation underneath it compresses.
Thirteen of the twenty-one legal practices come out replaced. Four are repriced. The last four are defensible.
Commercial contract drafting and negotiation leads the replaced list with fifteen companies competing for it. E-discovery and probate follow with ten each. Nine compete for tax law and planning, one of five practices at that number. Some of those nine sell research to the firm. Others sell the return, the plan, and the filing straight to a corporate tax department or an accounting firm, with no lawyer anywhere in the transaction.
The four that hold are white-collar defense and internal investigations, public-company reporting, public-company M&A, and first-chair trial practice. A separate twenty-six companies sell into those four, and they all stop at the same line: they take the research underneath the work and leave the billed act alone. A person still writes the declination memo, signs the filing, advises the board, and tries the case.
The repricing lands first
A firm feels the copilot in the year it buys the tool, because the hours come out of the matter whether or not anybody revisits the rate card. Those hours come out of the part of the business that still holds the money: 90% of US legal dollars still flow through hourly billing (Thomson Reuters and Georgetown Law, 2026 State of the US Legal Market), so a tool that cuts hours cuts revenue in the same motion.
Firms know this and haven’t acted on it. The clearest measurement is at the small end of the market, where Clio’s 2026 Legal Trends Report found 86% of solo firms have not adjusted their pricing models since adopting AI. The hours really are coming down, and every one of them reaches the client as a discount nobody negotiated.
Your general counsel sets the date
A replaced practice keeps billing long after the verdict lands. The companies selling that work can’t take a matter until the client is capable of running it, and building that capability is exactly what they sell. A general counsel evaluates the tool, pilots it on the simplest matters, hires someone to own it, and only then stops sending the work out.
Clients have said where this goes. In the ACC and Everlaw survey of 657 in-house legal professionals released in October 2025, 64% expect to rely less on outside counsel, and the work they most want to pull in is drafting, at 78%, ahead of contract management and research. That matches the census ranking: the practice carrying the most competitors is the one in-house teams name first.
The work still gets done. It moves inside corporate legal departments and out to alternative legal service providers, which operate free of the ownership and practice restrictions a firm works under.
A repricing shows up in the numbers: realization slips, a partner asks why, somebody produces an answer. A matter that never arrives shows up nowhere, and the associate who used to staff it goes on to something else.
Your partners decide this one
Buying the same copilots your competitors buy changes what production costs you while the offering stays exactly what it was. On a repriced practice that’s enough to open the rate conversation. A replaced practice is different: the client can produce the first pass alone, so the whole fee has to be rebuilt, not renegotiated. Your clients have already planned their side of it.
Your own book already sorts into these three verdicts. On the practices that come back replaced, the fee is attached to a deliverable your client can produce this quarter, at the price of the tool.