About
GCS (formerly, GRAPH Strategy UK) is an award-winning consultancy that supports entrepreneurial management teams and their investors at critical moments of the growth journey. We combine analytical rigour with clarity of thought to help you build conviction, manage risk, and move further, faster.
Deep Expertise
Explore our comprehensive service offerings
Commercial Due Diligence (CDD)
Supporting management teams and investors with evidence-based insights for the moments that matter most. Whether acting on the buy-side or sell-side, we combine deep primary research, analytical rigour, and a clear point of view to help you make confident, informed decisions.
Market sizing and growth
Customer behaviour and satisfaction
Competitive positioning and risks
Business model attractiveness and growth drivers
Equity story and exit readiness
Customer Value Creation
We believe deep customer insight is at the heart of any successful strategy. Our work helps clients understand how and why customers buy — and where opportunities exist to deepen loyalty, reduce churn, and grow share of wallet.
Voice of customer research — qualitative and quantitative
Churn analysis and retention drivers
Segmentation and cohort performance
Customer acquisition efficiency
Pricing and willingness-to-pay insights
Strategic Growth
We help businesses unlock new revenue through international expansion, product innovation, and business model shifts — all grounded in rigorous market analysis, competitive insight, and a clear view of what it takes to win.
International market prioritisation
New product and service evaluation
Competitive advantage and “right to win”
Business model optimisation
TAM/SAM analysis
M&A Strategy
In a complex deal environment, we help clients unlock value throughout the investment cycle. Our work identifies the most attractive opportunities, measures risk, and supports successful execution, providing focused, actionable advice at every step of your journey.
M&A target origination, mapping, and screening
Strategic fit assessments
Light-touch “pulse checks” and focused customer referencing
Assessment of bolt-on acquisitions
Exit preparation and value driver review
What we do
Our Services
Work that matters, with people who care
Join our mission to deliver sharp strategy and real-world impact.
Explore careers at GCSDeep Expertise
Our Specialisms
Deep Expertise
Our Specialisms
Software is one of the most resilient engines of growth.
We've supported both established leaders and fast-growing challengers, helping them scale with stronger customer strategies that turn rapid growth into sustainable success.
Tech and data services are the backbone of digital transformation and AI adoption.
We support investors and management teams in navigating one of the fastest-moving services markets.
Services businesses succeed on trust, expertise, and their ability to leverage technology to drive scalability.
We’ve supported management teams and investors across a wide range of sub-sectors, helping evidence growth potential, test resilience, and shape strategy.
The built environment is being reshaped by technology, sustainability, and new ways of working.
We partner with businesses that are driving change in how buildings and infrastructure are managed, operated, and future-proofed.
ESG has become central to business strategy, driving demand for companies that enable others to meet their sustainability and impact goals.
We help articulate and evidence the value of these businesses — clarifying their propositions, highlighting growth opportunities, and giving investors and management teams confidence in long-term outcomes.
Trusted by the Industry
Awards & Recognition
Mergermarket British Private Equity Awards
Winner, Commercial Due Diligence Provider of the Year 2024
Consultancy.uk Awards
Top Consulting Firms of 2025 (Private Equity)
Real Deals Private Equity Awards
Finalist, Commercial Due Diligence Provider of the Year 2023, 2024, 2025
Finance Monthly Awards
Advisor of the Year 2024
Gold Standard Internship Host
University of Oxford Careers Service, 2025
Trusted By Leading Investors and Ambitious Teams
How can we help?
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