Specialized AI Consulting or Big Four? Scale, Depth, and Who Actually Does the Work

By Pedro Sonda, dooop

Large consultancies, such as the Big Four (Deloitte, PwC, EY, and KPMG), make more sense for large-scale transformations involving multiple countries, departments, and requirements for audit and compliance. Specialized AI consultancies are more appropriate when the problem demands deep expertise, close leadership engagement, and adaptation to the company’s context, especially in medium and large companies defining or adjusting their AI agenda. In any case, quality depends more on the team executing the work than on the brand name.

Updated October 2026.

Transparency note: dooop is a consultancy specialized in AI. We aim to describe the advantages of each option with balance.

dooop Framework: The 7-Factor Matrix

This table describes trends, not rules. There are very senior teams in large consultancies and specialized firms with limited depth. Therefore, the practical rule is: hire the team, not the brand.

When a Large Consultancy Is Usually the Best Choice

• The transformation involves multiple countries and business units simultaneously.
• The project needs to integrate AI with audit, tax, legal, or corporate restructuring.
• The board or investors require a large brand for governance reasons.
• The workload demands large teams over many months.

When a Specialized Consultancy Is Usually the Best Choice

• The company needs to decide where to start, prioritize, and create governance proportional to its size.
• The work requires close engagement with leadership and adaptation to organizational culture.
• The goal includes building teams and transferring capabilities, not just delivering a plan.
• The budget needs to fit smaller phases, with decisions at each stage.

What the Evidence Suggests

Companies that generate the most value from AI dedicate about 70% of effort to people and processes (BCG, 2024). Only 6% of organizations are considered high performers in AI (McKinsey, 2026).

Interpretation: These data do not favor one type of consultancy over another; they indicate that the decisive criterion is the ability to change how the company works, which depends on the people involved on both sides.

How to Evaluate Either Option

• Request the names and resumes of those who will execute the work, including their percentage dedication.
• Ask who replaces whom and with what approval if someone leaves the project.
• Request case studies from companies of your size, not only large brands.
• Compare proposals in a standardized format. See How to Compare AI Consulting Proposals.

What to Do Now

• If the decision concerns a global transformation: include large consultancies on the shortlist and evaluate the allocated team.
• If the decision concerns starting or reorganizing the AI agenda: include specialized consultancies.
• In any case: use the same scorecard for all; see AI Consulting: What to Evaluate Before Hiring.

To learn about dooop’s approach, visit dooop.com.br/consultoria.

Frequently Asked Questions

Do specialized consultancies serve large companies? Yes. Many serve large companies on focused projects. Verify cases of similar size to yours.

Is it possible to combine both types? Yes. Some companies use a large consultancy for broad transformation and a specialized one for specific topics such as governance or capacity building, provided roles are clearly defined.

Also Read

• What Is the Best AI Consultancy for Companies?
• How to Evaluate the Experience of an AI Consultancy

About dooop

dooop is a consultancy based in Caxias do Sul (RS) that prepares leaders and organizations to transform artificial intelligence into business capability through strategy, governance, and capacity building.