Why AI Will Eat McKinsey’s Lunch — But Not Today
By Connie Loizos | June 29, 2025

Artificial intelligence (AI) is on the cusp of irrevocably transforming the professional services industry — a sector with an estimated $5 trillion in annual spending across consulting, law, and accounting. Yet, as Navin Chaddha, Managing Director of Mayfield (one of Silicon Valley’s most storied venture firms), notes, while the endgame is clear, the timetable remains uncertain.
Chaddha, whose portfolio boasts successes like Lyft and HashiCorp, is channeling Mayfield’s investments and focus into the practical realization of “AI teammates” — not just tools, but digital partners that work alongside humans to deliver dramatically higher productivity and unlock software-like margins in legacy, labor-intensive sectors.
The Case for AI Disruption in Services
The logic behind AI’s looming disruption is as straightforward as it is compelling. Today, consultancies and legal/accounting service giants depend on armies of knowledge workers billing by the hour, with deep client relationships and brand-driven trust forming the industry’s moat. But AI’s rapid evolution — especially agentic large language models (LLMs) and workflow automation — threatens to shift the whole value stack.
Chaddha states, “AI is a 100x force.” Just as the rise of enterprise SaaS replaced perpetual software licenses, AI allows for the automation of repetitive, structured work. Already, generic use cases — from salesforce integration to basic legal document generation — are being handled more accurately, cost-effectively and instantly by AI, relegating humans to only the most complex judgment and strategic functions.
Where the Revolution Starts: The Underserved
Rather than tackle global giants head-on, Chaddha advises founders to target fragmented and underserved markets first. “There are 30 million small businesses in the U.S. and 100 million globally who simply can’t afford traditional consulting fees,” he explains. For these businesses — needing anything from a digital receptionist to basic compliance guidance — outcome-driven, subscription-like AI solutions are game-changing.
This approach also sidesteps entrenched client relationships and the high switching costs that shield incumbents. Early AI consulting startups, such as Mayfield-backed Gruve, focus on building outcome-based, high-margin models where clients pay for results rather than billable hours. With Gruve, Chaddha reports, a managed security services division grew revenues from $5 million to $15 million in just six months, with gross margins as high as 80% — far exceeding the historical standard for human-heavy consultancies.

Outcome-Based Pricing: The New Normal
A defining feature of next-gen professional service firms will be outcome-based pricing. Instead of charging for time, vendors charge for measurable deliverables: a completed cybersecurity incident review, a closed deal, or a legal document delivered. Not only does this align incentives, but AI automation increases the share of tasks completed by software from perhaps 20% today to over 80% in well-targeted verticals.
Traditional firms maintain gross margins of 30–40% at best, but with AI handling low-complexity work at near-zero marginal cost, consultancies can achieve blended gross margins of 60–70% and net income margins of 20–30%. In fact, early customer pilots (e.g., with Fortune 500 security clients) confirm both strong demand and significant cost savings in this new model.
Why Incumbents Won’t Move Quickly
Despite the existential threat, Chaddha and others caution that global players like McKinsey, Accenture, Infosys, and TCS won’t simply pivot overnight. This “innovator’s dilemma” is stark: switching to an AI-driven, utility-style billing model disrupts existing contracts, revenue predictability, and career paths for thousands of traditionally-trained professionals. Public companies have strong incentives to protect quarterly earnings and brand equity, slowing meaningful transformation.
Earlier enterprise tech shifts — from on-prem software to SaaS — took nearly a decade to fully play out, and many historical leaders faltered or lost their dominance to new players during the transition. Chaddha expects this script to repeat: smaller, nimbler AI-first entrants will capture market share in neglected segments, gaining sophistication and scale before eventually threatening the big-firm status quo within 10 years.
“These small companies, which are not competing with the giants today, mark my words: in 10 years, they will be.” — Navin Chaddha, Mayfield
Redefining the ‘AI Teammate’
Mayfield’s $100 million dedicated fund for “AI teammates” reflects a subtle, strategic bet: the winning AI platforms will be those that embed deeply with human workflows, collaborate towards results, and enhance — not purely replace — human skill. “The aim is not to replace, it’s to team up and collaborate together,” explains Chaddha.
AI teammates, as envisioned, combine copilot-style toolsets, agentic process automation, and seamless integration into vertical SaaS platforms. The roles range from “HR teammate” to “sales engineering teammate” to “legal drafting teammate,” each tightly aligned to real business functions and measurable productivity improvements.
Tackling the Jobs Narrative
The advance of AI inevitably raises job displacement concerns. Chaddha argues for facing this reality directly: just as automation in previous tech waves shifted rather than eliminated entire workforces, new roles will emerge even as old ones become obsolete. He points to historical parallels — office software, ridesharing, mobile — where technology expanded markets and created net new opportunities.
“Yes, there’s going to be pain, but no pain, no gain. The jockey is human, the horse is AI. Over the long run, society adapts and finds ways to use technology for broader participation and growth,” he says. This is especially true in markets currently overlooked by existing players, where AI allows companies to serve customers who were previously priced out or ignored altogether.
Investment, Hype, and the ‘Art’ of Picking Winners
Despite frothy dealmaking and unpredictable outcomes (recently, Wix acquired the 6-month-old AI coding company Base44 for $80 million, representing a staggering multiple over annualized revenues), Chaddha cautions that only a disciplined, long-term approach will succeed for investors. “It’s not a science, it’s an art,” he says, urging VCs to stick to their strategy, avoid FOMO, and focus on turning small capital into real value creation — not just logo-collecting.
For the startup ecosystem, the message is clear: build sustainable, innovative solutions targeting the real needs of neglected customers, allow margins and validation to compound before going head-to-head with incumbents, and adopt outcome-based models that unlock the full productivity promise of AI. In this new race, the winners will combine technical mastery, commercial creativity, and an unsentimental eye for market timing.

