--- title: "KPMG signs with Anthropic: three Big Four on Claude" date: 2026-05-20T08:00:00+02:00 language: en slug: 2026-05-20-kpmg-anthropic-claude-big-four-consulting url: https://mathieuhaye.fr/blog/en/2026-05-20-kpmg-anthropic-claude-big-four-consulting alternate: https://mathieuhaye.fr/blog/2026-05-20-kpmg-anthropic-claude-big-four-consulting category: Applied AI description: "On May 19, 2026, KPMG rolled out Claude to its 276,000 staff. With Deloitte and PwC, three Big Four firms have signed alliances with Anthropic in seven months." --- # KPMG signs with Anthropic: three Big Four on Claude > On May 19, 2026, KPMG rolled out Claude to its 276,000 staff. With Deloitte and PwC, three Big Four firms have signed alliances with Anthropic in seven months. On May 19, 2026, KPMG and Anthropic [formalized a global alliance](https://www.anthropic.com/news/anthropic-kpmg) that reshuffles the consulting industry. Every KPMG professional, all 276,000 of them across 138 countries, will gain access to Claude. The model is embedded inside Digital Gateway, KPMG's proprietary AI platform that already powers tax, legal and private-equity engagements. KPMG also becomes Anthropic's preferred partner for deploying Claude across private-equity firms and their portfolio companies. The timing tells the real story. On October 6, 2025, Deloitte set the tone with a Claude rollout to [470,000 employees across 150 countries](https://www.cnbc.com/2025/10/06/anthropic-deloitte-enterprise-ai.html), the largest enterprise contract Anthropic had ever signed at the time. On May 14, 2026, PwC [expanded its own alliance](https://www.pwc.com/us/en/about-us/newsroom/press-releases/anthropic-pwc-expand-alliance-agentic-enterprise.html) with Claude Code and Cowork, certified 30,000 professionals and launched an "Office of the CFO" line of service built entirely on Claude. KPMG closed the sequence five days later. Of the Big Four, only EY has yet to announce its equivalent. ## What KPMG is really buying The press release talks about AI and productivity, but the real transaction sits elsewhere. KPMG is buying an Anthropic engineering team that will work directly alongside Digital Gateway engineers. The scope includes Claude Cowork and Managed Agents for tax engagements, Claude Code for modernizing the IT stacks of PE portfolio companies, and a cybersecurity track for vulnerability detection. The US member firm holds the mandate for the private-equity segment, a high-margin market where productivity per fee dollar is a permanent obsession. For KPMG, this is not about "doing AI". It is about defending the base. Tax compliance, analytical review of financial statements and due diligence make up roughly half of Big Four revenue. These are exactly the tasks Claude can now execute in minutes where a junior team used to spend two weeks. Rema Serafi, KPMG's Vice Chair Tax, summarized the pitch in one sentence: "with Cowork and Managed Agents integrated in Digital Gateway, that same capability takes minutes". A firm that does not equip itself will lose the engagement to a competitor billing at agent-hour rates. ## Why Claude won the audit shops Three of four firms picking the same vendor is a market signal worth examining. OpenAI remains the consumer leader and keeps GPT in front on some technical workloads. But in March 2026, Anthropic overtook OpenAI in B2B adoption: 34.4% of businesses now use Claude versus 32.3% for OpenAI, according to [Ramp usage data released in May](https://www.therundown.ai/p/the-enterprise-shift-openai-saw-coming). Three reasons keep coming back in conversations with the IT leadership of these firms. First, governance. Anthropic has been selling a "safety first" story since day one, and that story fits perfectly with the constraints faced by the Big Four, who audit banks, governments and listed groups. A single client-data leak can end an audit license. Bill Thomas, KPMG's global CEO, framed the alliance around a "shared commitment to responsible AI" and put security and trust ahead of speed. The marketing line maps directly to the procurement decision. Second, performance on long, reasoning-heavy tasks. Tax reviews, ALM models and ESG due diligence ask the model to follow structured reasoning across 80 pages of documents. Claude holds a recognized lead on this kind of workload, and the Opus 4 family released in late 2025 narrowed the coding gap with OpenAI. PwC quantifies the observed gains at up to 70% in delivery time: an insurance underwriting engagement that used to take ten weeks now runs in ten days. Third, control of the stack. Anthropic acquired Stainless on May 18, 2026, absorbing the SDK that powers competing model APIs. The same week, SAP placed Claude at the center of its autonomous ERP suite. Anthropic is gradually becoming the default operator of enterprise workflows. For a Big Four firm betting the next five years of revenue, locking in to the software layer that is embedding itself everywhere is a rational call. ## Audit becomes a software product The October-to-May sequence sketches a more brutal scenario than the press releases admit. Audit and advisory have been sold for 120 years as a labor-heavy service. A senior manager's billing rate in Paris sits around €500 per hour; a partner clears €1,200. That grid assumes engagements take time. If Claude executes in 40 minutes what a senior consultant produced in a week, two things happen at once: margins explode in the short term, and prices collapse in the medium term. Clients are not naive. A CFO who watches her audit firm press a button to produce 300 pages of tax memo will renegotiate the hourly rate at the next renewal. The Big Four are pre-empting that move on two fronts. First: shifting value from "time spent" to "diagnostic product". PwC illustrates this with its Office of the CFO, sold as a packaged offer, not as billable hours. Second: locking in clients through the platform. Digital Gateway at KPMG, the Claude Center of Excellence at Deloitte. The point is no longer to sell advice but to continuously operate an analytics infrastructure. The risk for these firms is becoming Claude integrators rather than consulting brands. If 80% of Digital Gateway's value comes from Claude, who owns the client relationship five years out? Anthropic understands this and is structuring its offering to stay upstream: the [new enterprise services joint venture backed by Blackstone and Goldman Sachs](https://www.anthropic.com/news/enterprise-ai-services-company) places Anthropic directly with mid-cap clients, with no intermediary. The AI vendor and the auditor are running on the same on-ramp. ## My read from the Fromagerie Ermitage workflow I run a freelance engagement [automating competitive monitoring for Fromagerie Ermitage](/#bento-04) with n8n and Claude. The workflow has 93 nodes that scan a source panel every morning, extract weak signals on competitors and produce a deliverable ready for the commercial directors. It is a tiny loop compared to Digital Gateway, but the logic is identical: a junior task replaced by an agent that runs continuously and costs a few cents per execution. What the KPMG sequence teaches me is that this kind of tooling does not stay a hidden edge for long. Once the Big Four industrialize it across 470,000 people, the market rate for manual research collapses within two years. My bet is that a freelance consultant who can code their own agent workflows keeps an edge over those who consume AI through a consulting firm. The Claude layer has become a commodity; what sells now is fine-grained workflow integration, data judgement and human accountability on the deliverable. --- **Take-away.** Three Big Four on Claude in seven months is not a wave of press releases: it is the end of hourly-rate consulting. The 2026 question is no longer which firm adopts AI, but which can still explain its prices. --- Source: [https://mathieuhaye.fr/blog/en/2026-05-20-kpmg-anthropic-claude-big-four-consulting](https://mathieuhaye.fr/blog/en/2026-05-20-kpmg-anthropic-claude-big-four-consulting) | Other language: [https://mathieuhaye.fr/blog/2026-05-20-kpmg-anthropic-claude-big-four-consulting](https://mathieuhaye.fr/blog/2026-05-20-kpmg-anthropic-claude-big-four-consulting)