Best Generative AI Consulting Firms

QuantumBlack, AI by McKinsey vs KPMG: full comparison for 2026

Quick verdict

QuantumBlack, AI by McKinsey (4.8/5) edges ahead of KPMG (4.1/5) overall. QuantumBlack, AI by McKinsey is the better choice for enterprises wanting McKinsey-scale generative AI expertise with real engineering behind it. KPMG is the stronger option for enterprises wanting productized generative AI tools alongside Big Four consulting. The right choice depends on your project size, budget, and required tech stack.

QuantumBlack, AI by McKinsey vs KPMG: head-to-head summary

Criterion QuantumBlack, AI by McKinsey KPMG
Founded 2009 1987
HQ London, United Kingdom London, United Kingdom
Team size 1,001-5,000 251,000-275,000
Rating 4.8 / 5 4.1 / 5
Primary differentiator A Formula 1 data-science origin behind a 1,000-plus person generative AI practice at McKinsey Named generative AI products (aIQ, Mystro) rather than purely bespoke consulting engagements
Pricing model Retainer, enterprise contracting Retainer, enterprise contracting
Min. engagement Not disclosed Not disclosed
Primary tech stack Python, AWS, Azure Python, AWS, Azure
Industries served Financial services, Manufacturing, Retail & e-commerce, Healthcare Financial services, Healthcare, Manufacturing, Government

QuantumBlack, AI by McKinsey vs KPMG: overview

QuantumBlack, AI by McKinsey

QuantumBlack began in 2009 as a performance-analytics unit for Formula 1 teams, joined McKinsey in December 2015 at roughly 45 people, and now runs McKinsey's AI and generative AI practice out of London across more than 40 offices worldwide, with a reported headcount in the 1,001-5,000 range. Its generative AI work spans large language model deployment, retrieval systems, and agentic workflows, framed with the same discipline the unit brought from motorsport: a claim isn't real until it's tied to a measured number.

KPMG

KPMG formed in 1987 from the merger of Peat Marwick International and Klynveld Main Goerdeler, with roots tracing back to 1897, and is headquartered in London. The firm employs roughly 251,875-275,288 people depending on the reporting period. Its AI services include named products such as aIQ and Mystro for AI transformation and digital labor optimization, giving it more named generative AI products than some Big Four peers, though details on staff specifically dedicated to generative AI weren't disclosed.

Services and capabilities: QuantumBlack, AI by McKinsey vs KPMG

Capability QuantumBlack, AI by McKinsey KPMG
AI strategy consulting
Generative AI
Machine learning
Data engineering
MLOps
Fixed-price projects
Dedicated team model

Tech stack comparison: QuantumBlack, AI by McKinsey vs KPMG

Framework / platform QuantumBlack, AI by McKinsey KPMG
Python
AWS
Azure
Google Cloud
Kubernetes
LangChain N/A N/A
PyTorch N/A N/A

Pricing comparison: QuantumBlack, AI by McKinsey vs KPMG

Criterion QuantumBlack, AI by McKinsey KPMG
Minimum engagement Not disclosed Not disclosed
Engagement models Retainer, Dedicated team Retainer, Dedicated team
Rate transparency Not public Not public
Price tier Mid-market Mid-market

Target audience comparison: QuantumBlack, AI by McKinsey vs KPMG

Dimension QuantumBlack, AI by McKinsey KPMG
Best company size Startup to mid-market Mid-market to enterprise
Best industries Financial services, Manufacturing, Retail & e-commerce Financial services, Healthcare, Manufacturing
Best use cases Running an enterprise-wide generative AI strategy program with board-level visibility., Shortlisting a recognizable name for a procurement process that requires one. Adopting a named, productized generative AI tool rather than commissioning a fully bespoke build., Running an AI workforce transformation program alongside existing KPMG advisory work.
Typical project type Retainer Retainer

QuantumBlack, AI by McKinsey vs KPMG: pros and cons

QuantumBlack, AI by McKinsey
+ The McKinsey name secures board-level attention that most generative AI boutiques can't get on their own.
+ A Formula 1 analytics origin story reflects genuine engineering discipline behind the generative AI branding.
+ More than 1,000 dedicated AI staff across 40-plus global offices.
+ Runs generative AI as a distinctly named practice inside McKinsey, not a rebadged strategy offering.
- Pricing and minimum commitments sit above what most mid-market buyers can justify
- Being embedded in a much larger firm limits flexibility on scope and pace compared with an independent boutique
KPMG
+ 251,000-plus person global scale supports the largest enterprise engagements.
+ Named, productized generative AI tools give clients something more concrete to evaluate than a generic strategy deck.
+ Nearly 130 years of institutional history dating back to 1897.
+ Global headquarters in London simplifies EU and UK contracting.
- Reported headcount varies by roughly 25,000 across different reporting periods
- Big Four pricing and engagement minimums put it out of reach for most small and mid-size buyers

Who should choose QuantumBlack, AI by McKinsey?

A typical fit: running an enterprise-wide generative AI strategy program with board-level visibility.

A Formula 1 data-science origin behind a 1,000-plus person generative AI practice at McKinsey. Minimum engagement is not publicly disclosed. Works best with clients in Financial services, Manufacturing, Retail & e-commerce, Healthcare.

Who should choose KPMG?

A typical fit: adopting a named, productized generative AI tool rather than commissioning a fully bespoke build.

Named generative AI products (aIQ, Mystro) rather than purely bespoke consulting engagements. Minimum engagement is not publicly disclosed. Works best with clients in Financial services, Healthcare, Manufacturing, Government.

Decision matrix: QuantumBlack, AI by McKinsey vs KPMG

Your situation Recommended choice
You need full-ownership delivery on a defined project scope Both offer fixed-price models
You need a large dedicated team for an ongoing programme QuantumBlack, AI by McKinsey
Your budget is at the lower end Compare: QuantumBlack, AI by McKinsey (Not disclosed) vs KPMG (Not disclosed)
You need specialist depth in a specific vertical QuantumBlack, AI by McKinsey
You need staff augmentation or team extension Neither; consider alternatives that offer staff aug
You need consulting before committing to a build QuantumBlack, AI by McKinsey

Use case fit: QuantumBlack, AI by McKinsey vs KPMG

Use case QuantumBlack, AI by McKinsey fit KPMG fit Winner
Running an enterprise-wide generative AI strategy program with board-level visibility. Strong Strong Both equally
Shortlisting a recognizable name for a procurement process that requires one. Strong Limited QuantumBlack, AI by McKinsey
Adopting a named, productized generative AI tool rather than commissioning a fully bespoke build. Limited Strong KPMG
Running an AI workforce transformation program alongside existing KPMG advisory work. Strong Strong Both equally
Fixed-price project Limited Limited Both equally
Dedicated team model Limited Limited Both equally

Verdict: QuantumBlack, AI by McKinsey vs KPMG

QuantumBlack, AI by McKinsey (4.8/5) is the stronger overall choice for most Generative AI Consulting projects. A Formula 1 data-science origin behind a 1,000-plus person generative AI practice at McKinsey.

KPMG (4.1/5) is worth a look if you need running an AI workforce transformation program alongside existing KPMG advisory work. If your situation matches that, KPMG is a competitive option.

Related comparisons

QuantumBlack, AI by McKinsey vs KPMG FAQ

Is QuantumBlack, AI by McKinsey better than KPMG?

QuantumBlack, AI by McKinsey (4.8/5) scores higher overall, but "better" depends on your use case. QuantumBlack, AI by McKinsey's strongest advantage: the McKinsey name secures board-level attention that most generative AI boutiques can't get on their own. KPMG's strongest advantage: 251,000-plus person global scale supports the largest enterprise engagements.

How do QuantumBlack, AI by McKinsey and KPMG differ in pricing?

QuantumBlack, AI by McKinsey uses retainer, enterprise contracting pricing. KPMG uses retainer, enterprise contracting pricing. Neither firm publishes a full rate card; a discovery call is required for project-specific quotes.

Which is better for enterprise: QuantumBlack, AI by McKinsey or KPMG?

KPMG is the larger team and typically the better enterprise-scale choice. For very large programmes, verify team size and compliance coverage directly with each firm before shortlisting.

What are the main differences between QuantumBlack, AI by McKinsey and KPMG?

QuantumBlack, AI by McKinsey's primary differentiator is: a Formula 1 data-science origin behind a 1,000-plus person generative AI practice at McKinsey. KPMG's primary differentiator is: named generative AI products (aIQ, Mystro) rather than purely bespoke consulting engagements. They also differ in team size (1,001-5,000 vs 251,000-275,000), minimum engagement (Not disclosed vs Not disclosed), and primary industries served (Financial services, Manufacturing vs Financial services, Healthcare).

Verify all details directly with each firm before making a decision.