Double-OO

What Double-OO does

Double-OO is a boutique advisory firm headquartered in Rotterdam, the Netherlands, specializing exclusively in post-M&A people integration. Founded in 2019 and operating with a team of five, the company positions itself as a "Post-Deal People Integration partner," intervening in the 24-30 month window after deal close where, it claims, 70% of M&A transactions underperform due to poor people integration. Its core offering is structured around a proprietary "Four Pillars" methodology — Culture, Commitment, Collaboration, and Communication — grounded in the evidence-based Prosci ADKAR change management framework, and delivered through four engagement roles ranging from strategic sparring to outcome execution and do-it-yourself client enablement.

The business is a professional services firm rather than a software or technology platform. Revenue is generated through project-based or retainer advisory and consulting fees for post-deal people integration work, with pricing negotiated per engagement and not publicly disclosed. The go-to-market is entirely direct: prospective clients schedule 20-minute introductory calls via Calendly from the firm's website, and the company targets leadership teams, HR/people decision-makers, and private equity sponsors involved in M&A transactions. Distribution is claimed to be global, though the operational footprint remains centered on Rotterdam with no disclosed regional offices or local hires.

The firm is founder-led by partners Mariken Kooi (Prosci/ADKAR certified since 2015, prior experience at Mercedes-Benz, Shell, and Damen Shipyards) and Raymond de Looze (25 years of post-deal integration experience including KPMG, founder of boutique tax firm RED in 2010, and author of three bestselling management books). No institutional investors, funding rounds, customers, partnerships, certifications, or awards are disclosed in source material, and the company shows no AI/ML, API, or software product surface.

Name

Double-OO

Legal name

Double-OO

Website

https://double-oo.com

Company type

Private

Operating status

Operating

Short description

Double-OO is a Rotterdam-based boutique advisory firm that helps organizations and private equity sponsors manage the people side of M&A integration using a four-pillar methodology grounded in the Prosci ADKAR framework.

Ownership category

akta.pro rank

Headquarters

HQ city

Rotterdam

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Marketing or Sales, Operations, Others

Revenue model

1. Post-Deal People Integration Advisory Services: Professional services revenue generated through consulting engagements focused on post-M&A people integration. The company acts as a 'Post-Deal People Integration partner', offering services ranging from strategic sparring to outcome execution. Revenue is derived from advisory and consulting fees, likely project-based or retainer arrangements given the enterprise B2B nature of M&A integration engagements.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Double-OO is a boutique post-deal people integration advisory firm that helps organizations prevent avoidable departures and capture full M&A deal value. Services are delivered via four partnership roles (Strategic Sparring Partner, Proactive Value Fire-Starter, Outcome Execution Partner, and DIY advisory) and structured around four pillars: Culture, Commitment, Collaboration, and Communication, applied within the critical 24-30 month post-close integration window.

Product overview

Double-OO is a specialist Post-Deal People Integration partner offering professional consulting services. Their core offering is built around four pillars: Culture, Collaboration, Commitment, and Communication. They provide services in four partnership roles: Strategic Sparring Partner, Proactive Value Fire-Starter, Outcome Execution Partner, and 'We Help You Do It Yourself'. The company operates as a consulting firm, not a software platform.

Differentiator

Problem solved

Functional benefit

Products and services

• Post-Deal People Integration Services Specialist consulting services helping organizations prevent avoidable departures and capture the full value of M&A transactions through structured people integration across the four pillars (Culture, Commitment, Collaboration, Communication). Delivered via four partnership modes: Strategic Sparring Partner, Proactive Value Fire-Starter, Outcome Execution Partner, and DIY advisory.

Quantifiable outcome

• 5-15% profit erosion when culture and people integration left to chance
• +4 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Recent moves3 records

Broad incumbents

• KPMG: Big 4 firm with a global M&A integration practice spanning deal advisory, people and change, and integration management. Comparable because founder Raymond de Looze gained hard-side integration experience at KPMG, and Double-OO's methodology competes for the same enterprise M&A advisory mandates.
• Deloitte: Big 4 firm with a dedicated M&A and Integration Services practice covering HR, culture, and change. Directly competes for enterprise post-M&A people integration mandates and offers bundled services that overlap Double-OO's value proposition.
• PwC: Big 4 firm offering M&A integration, organizational change, and people-related advisory. Operates at scale across multiple geographies and competes for the same enterprise post-deal integration engagements Double-OO targets.
• McKinsey & Company: Global strategy firm with a dedicated M&A Practice addressing integration, organizational design, and culture. Competes with Double-OO for high-stakes post-deal people integration work, especially with PE sponsors and large corporates.
• Bain & Company: Top-tier strategy firm with a deep M&A practice, including post-merger integration advisory. Strong overlap with Double-OO in serving PE clients and corporate acquirers on the people side of integration.
• Boston Consulting Group: Global strategy firm with M&A and Integration practices focused on value capture and organizational change. Comparable as a competitor for enterprise M&A integration mandates that Double-OO also targets.
• Willis Towers Watson (WTW): Global advisory firm offering M&A and integration consulting alongside broader HR and risk services. Competes for enterprise M&A people integration engagements with bundled solutions.
• Aon: Global professional services firm offering M&A advisory, human capital, and integration services. Comparable as a broad incumbent that competes for enterprise M&A people integration mandates.

Direct peers

• Integration Management Consulting (IMC Group): Boutique consultancy specialized exclusively in post-merger integration and value capture. Closely comparable to Double-OO in being a specialist PMI firm targeting the same M&A integration buyer.

Emerging players

• Prosci: Change management research and training company whose ADKAR methodology underpins Double-OO's framework. Comparable as an enabler/competitor in the change management space, with overlapping advisory and training offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat2 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Double-OO