The Big Four professional services firms—EY, KPMG, Deloitte, and PwC—are facing mounting pressure from Silicon Valley’s leading artificial intelligence companies as they seek to establish themselves in the rapidly evolving AI consulting market. The rise of AI specialists OpenAI and Anthropic, known for developing ChatGPT and Claude respectively, is challenging traditional consulting models by offering automated, tech-driven services that promise to reshape the $1 trillion management consulting industry.

Both OpenAI and Anthropic have recently launched joint ventures providing consultancy-style advice aimed at helping enterprises deploy AI technology at scale. These ventures offer AI “agents” capable of performing tasks traditionally handled by junior consultants, including preparing pitches, analyzing earnings, conducting valuations, and auditing financial statements. The entry of these AI labs into consulting marks a shift in how professional services are delivered, with clients increasingly demanding that routine and low-value work be performed by AI systems, underscoring a broader transformation in the sector.

The Big Four firms have responded by aggressively repositioning themselves as AI experts and investing heavily in new talent, often recruiting specialists with advanced AI skills and technology backgrounds. Many are hiring professionals known as Forward Deployed Engineers (FDEs)—hybrid roles combining consulting and coding expertise—to embed within client operations and tailor AI applications to specific business needs. EY, for example, recently announced plans to build its own FDE workforce, while KPMG, Deloitte, PwC, and other major consultancies also seek similar talent.

Despite these efforts, industry observers remain skeptical about the long-term ability of traditional consulting firms to compete with Silicon Valley’s AI laboratories. Recruiters note that the AI companies can leverage their tech-native cultures and significant funding to attract top talent and deliver AI-driven consulting services more efficiently and at a potentially lower cost than traditional firms burdened by their partnership structures and legacy business models.

Consulting executives acknowledge the difficulty of the challenge but emphasize their distinctive strengths. Tony Alvarez, managing director of Alvarez & Marsal, highlighted his firm’s four decades of restructuring expertise and its ability to integrate AI into practical business outcomes. Likewise, KPMG’s Lisa Fernihough and PwC’s Claire Reid pointed to their firms’ sector-specific knowledge combined with technological innovation as key competitive advantages.

The escalating competition has driven a wave of mergers and acquisitions in the AI consulting space. Notably, Accenture acquired UK-based Faculty earlier this year to bolster its AI capabilities, while OpenAI’s purchase of the UK consultancy Tomoro AI, which serves clients such as Tesco and Virgin Atlantic, signals a growing push to capture corporate AI advisory work directly.

As AI continues to disrupt professional services, some experts warn that entrenched partnership structures within the Big Four could limit their agility and willingness to invest heavily in new technologies without eroding partner payouts. Meanwhile, private equity-backed firms like Grant Thornton are seeking alternative funding mechanisms to finance technology investments.

Preetham Peddanagari, EY’s chief technology officer, summarized the shifting landscape by emphasizing the need to combine AI-native solutions with trusted governance and deep industry knowledge to meet evolving client demands. The mounting involvement of Silicon Valley’s AI pioneers, however, suggests a significant transformation is underway in an industry that has long relied on human expertise and traditional consulting frameworks.