Consulting AI Power Rankings

September 2026 Strategy Update · Ranked by count of validated AI relationships (241 total tracked) · FA = OpenAI Frontier Alliance member · Curated by Mantu

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#FirmAI relationshipsDeclared AI investmentCategory
1 Accenture FA 60 $6B+ Dominant Integrator
2 Deloitte 37 $3B+ Big 4
3 KPMG 27 $2.1B Big 4
4 EY 26 $3B+ Big 4
5 PwC 20 $1.4B Big 4
6 McKinsey & Company FA 17 — MBB Strategy
7 Capgemini FA 15 — Frontier Alliance
8 Bain & Company 13 — MBB Strategy
9 BCG FA 12 $500M MBB Strategy

Rank = a transparent count of validated relationship edges, never a composite score. Investment figures are declared/announced amounts. OpenAI's $122B includes conditional and vendor-linked components (~$37B immediate cash). Valuations are post-money where reported. Key claims externally validated June to September 2026 (TechCrunch, Bloomberg, CNBC, Fortune, PR Newswire, firm newsrooms). Relationship years are first-public-announcement years; long-tail partnerships without a public record carry era estimates (flagged yearEstimated). Rumored or unclosed rounds are excluded.

Cite as: "Consulting AI Power Rankings, September 2026 Strategy Update, Mantu (https://ai-ecosystem.pages.dev/rankings/)". Dataset: llms-full.txt · Excel · Talk to Mantu