mattermeter
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An open letter to the Managing Partner of a law firm

The pyramid, before and after AI Illustrative · hours on one matter

Before · 20 hours

2
6
12

With AI · 9 hours

2
4
3
9 associate hours gone
Partner Senior associate Junior associate
AI shrinks the bottom of the pyramid first: the associate hours that have long funded partner profits. The work still gets done, and the partner’s time barely changes. What changes is whether the leverage your firm’s economics were built on still holds.

Your firm just had a very good year.
That is exactly when this conversation is hardest to start.

AI is eating the bottom of the pyramid. That is where your profits come from.

Notes for the partner who will be judged, years from now, on what the firm decides in the next two.

Your firm probably had a strong year. Rates went up. Demand held. The partners are content, and the annual meeting will be a pleasant one.

And yet there is something you can’t quite put on the agenda. The associates are faster than they used to be. Clients are asking sharper questions about how the work gets done. And nobody in the room can say, with numbers, what this means for profit per partner three years from now.

Your instinct is right. Consider five facts.

1. Your business model runs on hours. The hours are changing.

In Clio’s 2026 research, 85 percent of legal professionals reported some AI adoption at their firms. Yet Thomson Reuters estimates that about 90 percent of legal dollars still flow through standard hourly billing. The way the work is done and the way it is paid for are moving in different directions. That gap will not stay open for long.

2. Leverage was the engine. AI changes the engine.

For generations, partner profits have been funded by associate hours. AI removes those hours first. That is good news for clients and an open question for partners. Whether it becomes good news for your firm depends on decisions about pricing, staffing and training that most partnerships have not yet made.

3. Clients have noticed, and they are not shy about it.

BigHand’s 2026 research found that 56 percent of firms saw rising client demand for AI efficiencies or transparency. General counsel know what AI can do. Sooner or later, your biggest client will ask why this year’s invoice looks like last year’s.

13%

average law-firm profit growth in 2025. Good years are when a business model is hardest to question.Thomson Reuters, 2026 US Legal Market Report

4. Your partners are pricing the future with the past.

The same BigHand study found that 63 percent of firms default to standard rates or historical pricing, and 35 percent named partner discomfort discussing AI as a barrier. In other words, many firms are pricing AI-assisted work from memories of work done without it, by partners who would rather not talk about it.

5. This is a partnership decision before it is a financial one.

Who keeps the value AI creates: the firm, the client, or both? No CFO can answer that alone, and no technology can answer it for you. It is a question for the partnership. Partnerships only agree on hard questions when everyone trusts the same evidence. Today, almost nobody has that evidence.

What we have built, and why we will not describe it here.

mattermeter was founded to help law-firm leaders see the economics of AI clearly enough to make decisions their partnership will stand behind. We have built something specific. We are not describing it on a public website. Some advantages last only as long as they stay private.

What we will say is this. It was built for finance, with your IT. It treats privilege and client confidentiality as non-negotiable. And it informs the partnership’s judgment rather than replacing it. Pricing authority stays with the partners who carry the client relationship.

Here’s what I’d like you to do.

Fill in the short form below. It takes less than a minute.

I will reply personally and arrange a private strategy briefing, just you, or you and your CFO. No product tour. We will talk about your firm’s economics and the handful of decisions your partnership will face as AI changes how the work is done. You leave with a clearer agenda for your next management committee, whether or not we ever work together.

Now the part I have to be straight with you about.

We are taking on no more than [5] founding firms before launch. That is how many we can serve properly while we are this small. Founding firms see the work first, help decide what is built, and get terms we will not offer again. When those places are gone, they are gone.

Somewhere, another firm’s management committee is starting this conversation. I would rather it were yours.

Sincerely,

[Founder name]

Founder, mattermeter

P.S. Everything we discuss stays between us, under NDA if you prefer. Your partners don’t need to know you’re asking these questions until you are ready to ask them yourself.

P.P.S. We wrote separate letters for your CFO and your CIO. If this one rings true, theirs will too.

For the Managing Partner

Yes. I want to see what AI means for our firm’s economics.

Please contact me to arrange a private strategy briefing. I understand it is confidential, can be held under NDA, may include my CFO, and places for founding firms are limited to [5].

No mailing lists. No sales sequence. A reply from the founder, personally.

The rest of your leadership team

Same question. Every seat at the table sees it differently.

We wrote a letter for each of them. Firms that move first usually have two or three of these people in the same room.

Sources

Thomson Reuters Institute, 2026 US Legal Market Report. Clio, legal industry research, October 2026. BigHand, 2026 legal pricing research. Figures come from separate surveys and populations and should be read independently. The matter in the illustration is hypothetical.