Consulting Companies in London: 79,795 Active Firms (2026)
Consulting companies in London advise organisations on strategy, operations, transformation and performance across the capital.
Buying centres tend to sit with chief executives, finance chiefs, operating leaders, portfolio teams and programme offices rather than procurement alone. Demand spans corporate, public-sector and investor-backed clients, with mandates ranging from strategy reviews and operating-model design to programme delivery, performance improvement and post-deal support. The commercial model is still mostly time-and-materials, fixed-fee projects or retained advisory work; the sell is trust, sector expertise and delivery capacity, not software resale. London’s mix therefore includes lean specialist practices with high fee intensity alongside broader advisory groups able to staff multi-workstream change programmes.
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London has 79,795 consulting firms actively trading, giving researchers a very large long tail rather than a tidy peer set. Reported employment across the cohort totals 160,989 people, though the headcount is likely concentrated among larger advisory groups and delivery-heavy practices. The base also includes many owner-managed consultancies, interim-led vehicles and specialist boutiques that can look sizeable by revenue per person without resembling scaled employers. For list users, turnover bands and employee counts matter more than incorporation status when separating commercial advisory firms from professional-service vehicles with limited operating substance.
Regulatory exposure usually sits with the client’s activity rather than the advisory model itself. Work for public-sector buyers brings formal procurement, audit trail and conflict-of-interest expectations; work for corporate and investor-backed clients tends to carry confidentiality, independence and delivery-governance requirements through contract terms. Market structure is fragmented because entry barriers are lower than in regulated professions, but credibility barriers remain high. Buyers often test partner experience, delivery governance and evidence from comparable assignments before awarding material programmes, especially where advice is linked to cost reduction, restructuring or operational change.
Early-commercial weight appears to keep the market fluid. Newer practices can win advisory work when founder expertise or a client relationship opens a door, yet repeatable delivery processes and bench capacity tend to decide whether they become durable employers. Larger consultancies have been under pressure to show clearer value on change programmes, while specialist firms can benefit when buyers want narrower expertise and shorter assignments. Consolidation remains plausible where boutiques have defensible sector knowledge, but the sector is likely to stay fragmented because experienced consultants can leave larger firms and re-enter the market with limited fixed overhead.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
79,795
Active firms
2026
372
Above £5M
Larger turnover band
19,878
New since 2022
Recent incorporations
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Key facts
About 1% of the trading cohort reports turnover above £5M (372 of 79,795 firms) — the rest sits below that revenue band.
24% of the cohort was incorporated since 2022 (19,878 firms), so a sizeable share is in its first few filing cycles.
Management consulting in London covers strategy, operations, transformation and performance advice for organisations in the capital.
Demand tends to track corporate spending on external expertise, so consulting pipelines can move with budgeting cycles.
Comparison work benefits from separating lean advisory vehicles from operating consultancies with delivery teams.
Top London Consulting companies
Financial sub-scores
Computed from 5 filingsProvides management consultancy services to financial services organisations, focusing on business transformation, organisational change, advisory support, people and workforce initiatives, and…
Serves financial services organisations of all sizes, including insurers and firms in the London Market, targeting senior leaders responsible for transformation, operations, people and programme…
Financial Health
StrongStrong · Hiring · 41% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides management consulting services including strategy development, organisational design, business transformation, culture and leadership development, sustainability, and technology advisory.…
Serves businesses, public sector bodies and nonprofits across defence, education, energy, entertainment, financial services, health, media, retail, telecoms, technology, transport and construction.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides financial, operational and strategic consulting to companies and investors, including transaction support, financial due diligence, valuation and modelling, restructuring and turnaround…
Serves companies and investors, including private equity and corporate finance teams, across sectors such as healthcare, technology, real estate, infrastructure, retail, financial services and…
Financial Health
StableStable · -43% CAGR over 6y
Location
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Financial sub-scores
Computed from 5 filingsProvides management and strategy consulting services to businesses and investors, including go‑to‑market and marketing strategy, supply chain and procurement optimisation, M&A due diligence and…
Serves B2B executives and investors at market-leading organisations across consumer goods, food, retail/e-commerce, healthcare, logistics, financial services, industrials, real estate, education,…
Financial Health
DistressedDistressed · -22% CAGR over 6y
Location
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Financial sub-scores
Computed from 5 filingsProvides strategic management consulting services to businesses, governments, and organisations, advising on corporate strategy, digital transformation, operations, and industry-specific challenges…
Serves senior leaders at large corporations, financial institutions, private equity investors, healthcare and education organisations, energy and industrial companies, and public sector bodies…
Financial Health
StableStable
Location
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Computed from 5 filingsProvides management and technology consulting services, helping organisations develop strategy, design products and services, implement digital, data and AI capabilities, improve organisational…
Serves senior leaders in large private and public sector organisations across consumer and manufacturing, defence, energy, financial services, government, health, life sciences and transport.
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides management consulting services focused on business transformation, including operating model and organisational design, delivery of digital and technology programmes, mergers and…
Serves business leaders and internal transformation teams in organisations facing operating model redesign, digital change, M&A integration or restructuring, typically firms needing external support…
Financial Health
StrongStrong · Growing, Hiring · 19% CAGR over 4y
Location
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Financial sub-scores
Computed from 4 filingsProvides management consulting services to financial services organisations, advising on banking, payments and capital markets strategy, risk and regulatory change, finance transformation, technology…
Serves B2B clients in financial services, including retail and commercial banks, cards and payments businesses, capital markets firms, fintechs and finance teams needing risk, regulatory, ESG or…
Financial Health
WeakWeak · -79% CAGR over 3y
Location
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Computed from 5 filingsProvides management consulting focused on business transformation, including strategy development, operating model design, leadership and culture change, operational improvement, and data and AI…
Sells to businesses seeking transformation support, particularly leadership teams in aviation, retail, energy, utilities, resources, health and wellness, and hospitality organisations.
Financial Health
DistressedDistressed · -8% CAGR over 5y
Location
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Provides operational advisory services to companies, supporting process transformation, leadership alignment and performance improvement. Works across functions including procurement, production,…
Serves private equity portfolio companies and their leadership teams, particularly organisations undergoing operational change across procurement, production, logistics, sales, marketing, IT, finance…
Financial Health
N/AN/A
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Provides management consultancy focused on organisational health, including strategy development, organisation design, transformation and change management, culture and leadership development, and…
Serves senior leaders and management teams in large organisations across private, public and nonprofit sectors, including defence, education, energy, financial services, healthcare, retail, telecoms,…
Financial Health
N/AN/A
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Computed from 5 filingsProvides management and strategy consulting services to multinational companies, advising on corporate strategy, mergers and acquisitions, growth, organisational efficiency, turnaround and…
Serves C-suite leaders at multinational corporations in chemicals, advanced materials, life sciences, healthcare, industrials, business services, consumer goods, retail, luxury and entertainment.
Financial Health
StableStable · -62% CAGR over 4y
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Computed from 5 filingsProvides management consulting services focused on project, programme and change management. Supports organisations in delivering critical programmes, implementing key systems, and managing mergers…
Serves B2B organisations across EMEA, APAC and the Americas undertaking large, critical programmes, including M&A and key system delivery initiatives, typically engaging senior leaders responsible…
Financial Health
StrongStrong · Hiring · 92% CAGR over 4y
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Financial sub-scores
Computed from 3 filingsProvides management consulting focused on digital and IT‑enabled transformation, operating model change, regulatory compliance, and corporate transactions. Advises organisations on technology…
Serves substantial international B2B clients in highly regulated or technology-disrupted sectors, including financial services, life sciences and healthcare, technology and communications, retail and…
Financial Health
HealthyHealthy · -13% CAGR over 2y
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Financial sub-scores
Computed from 5 filingsProvides management consulting services to financial services firms, advising on the design, planning and delivery of strategic and transformation programmes, including regulatory, technology and…
Targets senior leaders and executive teams within the financial services industry, particularly organisations in capital markets, treasury and investment operations.
Financial Health
StableStable · Hiring · 69% CAGR over 4y
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Computed from 4 filingsProvides business consulting services focused on organisational and digital transformation. Sources and deploys independent consultants to deliver programmes in strategy, technology, process…
Serves businesses undertaking transformation and change programmes, particularly organisations needing strategy, technology, process, people, programme delivery or digital transformation support.
Financial Health
WeakWeak · 1% CAGR over 3y
Location
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Computed from 2 filingsProvides management and technology consulting, advisory, and managed services to commercial organisations and government agencies. Services include strategy, operations improvement, risk and…
Serves commercial and public-sector organisations in healthcare, financial services, energy, infrastructure and national security, including government agencies, regulators, banks, insurers,…
Financial Health
WeakWeak · 7% CAGR over 1y
Location
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Computed from 5 filingsProvides commercial due diligence, market analysis and strategic advisory services for investors and operators in health care, social care, children’s services, education, pharmaceuticals and life…
Targets private equity investors, charities, owner-operators and corporate leaders active in health, social care, children’s care, education, pharma and life sciences.
Financial Health
StableStable · -8% CAGR over 4y
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Computed from 3 filingsProvides management and growth strategy consulting to businesses, including business and portfolio strategy, go‑to‑market planning, operating model design, competitor intelligence, scenario planning,…
Serves business leaders at medium to large corporations across industries, especially teams responsible for growth, strategy, innovation, marketing and sustainability in brands operating across…
Financial Health
WeakWeak · 1% CAGR over 3y
Location
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Computed from 5 filingsProvides consultancy on organisational change and digital transformation for public sector bodies. Services include target operating model design, strategy development, service design, project and…
Serves public sector organisations across the UK and Ireland, especially local government, housing, transport and health bodies, targeting senior leaders and teams responsible for digital…
Financial Health
StableStable · Hiring · 16% CAGR over 4y
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Computed from 5 filingsProvides management consultancy services to healthcare and life sciences organisations, advising on strategy, operating models, procurement and supply chain, financial performance improvement, market…
Serves NHS and healthcare provider organisations, integrated care systems, health and care commissioners, plus MedTech and life sciences companies, targeting senior leaders in procurement, finance,…
Financial Health
DistressedDistressed · -17% CAGR over 5y
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Computed from 5 filingsProvides digital transformation consulting for large enterprises, helping organisations implement technology, data and analytics solutions to improve operations and performance across sectors…
Serves large enterprises, public sector bodies and government organisations, selling to executive teams across aerospace, agriculture, automotive, consumer goods, energy, financial services,…
Financial Health
StrongStrong · Growing, Hiring · 38% CAGR over 5y
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Computed from 5 filingsProvides management consultancy and IT services focused on digital, data and technology transformation. Supports organisations with programme delivery, system replatforming, cloud procurement, and…
Serves public sector bodies, government departments, education organisations and large businesses running complex digital, data, technology and transformation programmes.
Financial Health
StrongStrong · Growing, Hiring · 67% CAGR over 5y
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Computed from 5 filingsProvides management consultancy services to capital markets and institutional finance firms, advising on strategy, transformation and operations across trading and post‑trade functions including…
Serves institutional capital markets firms, including financial institutions with front-to-back trading, clearing, collateral, treasury, post-trade, risk, legal onboarding, digital assets and ESG…
Financial Health
StrongStrong · Growing, Hiring · 43% CAGR over 5y
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Computed from 3 filingsProvides strategic advisory services for organisations delivering major projects and programmes, designing and embedding collaborative delivery environments, governance practices, and team behaviours…
Serves organisations and delivery teams engaged in major projects, programmes and complex environments across multiple sectors, including clients managing commercial and technical delivery challenges.
Financial Health
StrongStrong · Hiring · 25% CAGR over 2y
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Computed from 5 filingsProvides management consulting focused on strategy and strategic marketing. Conducts market research, customer relationship analysis, distribution channel strategy, and marketing planning. Advises on…
Serves B2B and B2C companies, public sector bodies and not-for-profits of all sizes, especially technology, communications, financial services, manufacturing, retail and fast-growing digital/cloud…
Financial Health
HealthyHealthy
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Computed from 5 filingsProvides management consulting focused on business strategy, leadership development and organisational effectiveness. Works with senior teams on strategy development, team structure and dynamics,…
Serves B2B clients, particularly organisations and senior leadership teams facing growth, execution, leadership or organisational effectiveness challenges across unspecified sectors.
Financial Health
StableStable · -68% CAGR over 4y
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Computed from 5 filingsProvides consulting services to public sector organisations including local authorities and housing associations. Advises on organisational transformation, service design, digital innovation, and…
Serves UK public sector organisations and partners, including local authorities, combined authorities, housing associations and public service bodies facing place-based, growth, transformation and…
Financial Health
HealthyHealthy · -62% CAGR over 4y
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Computed from 4 filingsProvides consulting services to financial services organisations, advising on strategy, business and technology transformation, regulatory programmes, and organisational design. Supports delivery of…
Serves mainly global financial services organisations, especially leaders in investment, operations, finance and technology functions responsible for complex change, regulatory and transformation…
Financial Health
StrongStrong · Hiring · 26% CAGR over 3y
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Computed from 5 filingsProvides strategic management consulting to businesses and investors, advising on growth strategy, value creation, customer insight research, and mergers and acquisitions. Uses market research,…
Serves B2B clients: business owners, senior managers and investors, including private equity, in business and financial services, technology, built environment, industrials, education, training,…
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 4y
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Computed from 5 filingsProvides digital transformation consultancy services to governments, public sector bodies, charities and commercial organisations, including digital strategy, service design, data strategy,…
Serves large commercial organisations, governments and global institutions, including public sector bodies, local authorities, charities, health and care providers, universities, financial services…
Financial Health
StrongStrong · Growing, Hiring · 43% CAGR over 4y
Location
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Computed from 5 filingsProvides business advisory and consulting services, including financial, strategic and operational planning. Works with companies to develop business strategies, improve operational processes, and…
Serves ambitious businesses and leadership teams seeking external financial, strategic and operational advisory support for growth, complexity management and long-term planning.
Financial Health
StableStable · 0% CAGR over 4y
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Computed from 5 filingsProvides consulting services to health and social care organisations, supporting system transformation, operating model design, workforce demand and capacity analysis, and service improvement across…
Serves health and social care organisations, including hospitals, ambulance and urgent care providers, integrated care systems, and social, community and mental health services.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
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Computed from 3 filingsProvides executive search, interim management, and consulting services. Supports organisations with leadership recruitment, independent consultants, and advisory on business strategy, change and…
Serves private equity-backed companies, listed organisations and public bodies, especially leadership teams running growth, change and transformation programmes across technology, data, finance,…
Financial Health
HealthyHealthy · Hiring · 31% CAGR over 2y
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Computed from 3 filingsProvides growth consulting services to companies, focusing on revenue growth management, customer journey and pricing optimisation, route‑to‑market and omnichannel strategy, and direct‑to‑consumer…
Sells to businesses seeking growth strategy support, particularly consumer goods and retail organisations focused on revenue growth, pricing, route-to-market, e-commerce, omni-channel fulfilment, and…
Financial Health
WeakWeak · -6% CAGR over 2y
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Computed from 5 filingsProvides management consultancy services to public sector and civil society organisations, including the NHS and local government. Advises on strategy, organisational development, service…
Serves UK public-sector and social-impact organisations, including NHS bodies, wider health and care providers, local and central government, councils, civil society groups and community…
Financial Health
HealthyHealthy · Hiring · 12% CAGR over 5y
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Computed from 5 filingsProvides management consulting services to insurance companies, brokers, service firms and investors. Advises on strategy, operations, technology and transformation, and supports mergers and…
Serves B2B leadership teams in the insurance industry, including carriers, brokers, service companies and investors across Europe, the US and Bermuda.
Financial Health
HealthyHealthy · -61% CAGR over 4y
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Computed from 5 filingsProvides consulting and delivery services to financial services firms, supporting strategic change and programme management, regulatory risk and compliance frameworks, digital transformation, data…
Serves financial services companies and their leadership teams worldwide, including organisations needing support with change, transformation, regulatory, risk, compliance, digital, data, AI, quality…
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
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Computed from 5 filingsProvides operations consulting focused on performance improvement, turnaround and transformation. Uses the Proudfoot System to work with frontline managers and workers to improve productivity,…
Serves B2B industrial organisations in mining, manufacturing, energy and utilities, targeting leaders responsible for operational performance and frontline management across global sites.
Financial Health
StableStable · -60% CAGR over 4y
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Computed from 5 filingsProvides management consulting services focused on business change and transformation. Advises organisations on programme management, technology implementation, organisational and cultural change,…
Serves large and multinational businesses, especially in retail and consumer goods, plus healthcare, manufacturing, utilities, oil and gas, targeting leadership teams managing complex organisational…
Financial Health
StableStable · 2% CAGR over 4y
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Provides consulting services to pharmaceutical, biotechnology and healthcare organisations. Advises on product and portfolio strategy, operating model design, organisational change, and project…
Serves B2B life sciences clients, including pharmaceutical companies, biotech firms, healthcare organisations and investors, with senior buyers in medical affairs, strategy, operations, governance…
Financial Health
N/AN/A
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Computed from 5 filingsProvides strategy and regulatory consulting to energy and water sector organisations, including utilities, network operators, investors and regulators. Advises on market reform, regulatory…
Serves B2B and public-sector clients in UK energy and water markets, including major water companies, electricity and gas network operators, energy retailers, investors, regulators and policymakers.
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
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Computed from 5 filingsProvides organisational change and transformation consulting, including organisation design, change management, leadership and culture development, and payroll or HR systems transformation. Advises…
Serves large businesses and public sector organisations undergoing transformation, including HR, leadership and operations teams in global enterprises, consumer brands and government departments.
Financial Health
WeakWeak · -3% CAGR over 4y
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Computed from 3 filingsProvides consulting and analytical tools for public sector organisations, supporting local authorities, health systems and social care services with strategy, financial sustainability, service…
Serves public sector leaders and organisations, especially local authorities, councils, integrated care systems and social care bodies working in children’s services, adult social care, health,…
Financial Health
WeakWeak · Hiring · 10% CAGR over 2y
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Computed from 3 filingsProvides on-demand consulting and talent services, connecting businesses with interim consultants, project teams and permanent hires. Delivers strategy, transformation, operational improvement,…
Serves B2B clients, including private equity firms, retailers, digital and tech companies, fintech and banking firms, investment/advisory businesses, professional services firms, and energy and…
Financial Health
DistressedDistressed · -9% CAGR over 2y
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Computed from 5 filingsProvides interim executive recruitment and consulting for business transformation programmes. Places C‑suite leaders, programme directors and specialists, and advises organisations on technology,…
Serves executive teams at organisations undergoing complex change across finance, healthcare, food and beverage, real estate, media, retail, utilities, FMCG, professional services and manufacturing.
Financial Health
StrongStrong · Growing, Hiring · 18% CAGR over 4y
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Computed from 3 filingsProvides business transformation consulting services, including digital strategy, business intelligence and data analytics, AI and machine learning implementation, marketing and customer experience…
Targets business leaders and organisations across sectors that need digital, data, AI, marketing, ESG and workforce change, operating internationally across the UK, Middle East, Europe and US.
Financial Health
HealthyHealthy · Hiring · 39% CAGR over 2y
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Computed from 5 filingsProvides consulting, managed services and specialist staffing to financial institutions and other organisations, covering technology infrastructure, regulatory compliance, governance and risk, and…
Serves large financial institutions and blue-chip organisations, including investment banks, buy-side and sell-side firms, clearing houses, and corporate teams with business, technology, risk and…
Financial Health
HealthyHealthy · -27% CAGR over 4y
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Computed from 5 filingsProvides management consultancy and recruitment services to charities, housing organisations and public sector bodies, advising on governance, strategy, finance, regulation, organisational…
Serves leadership teams and boards in charitable, not-for-profit and public sector organisations, including housing providers, local authorities, central government, public bodies, and health, care,…
Financial Health
StableStable · -65% CAGR over 4y
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How London Consulting companies work and how to sell to them
What they do
Consulting firms earn revenue by packaging senior judgement, research and delivery teams into client assignments. Work is usually scoped as a short diagnostic, a fixed-fee strategy or operating-model project, a retained advisory relationship, or a longer programme-delivery role billed by day rate. Some practices also attach training, benchmarking, due-diligence or interim-management services, but the core product remains expert time and method. Margin depends on utilisation, partner leverage, contractor mix and the ability to reuse templates or sector knowledge without making the service feel generic.
Who they sell to
Most sell to senior corporate, public-sector or investor-backed buyers rather than to departmental users alone. The first conversation often starts with a chief executive, finance chief, operating leader, portfolio team or programme sponsor, then moves through procurement, legal and information-security checks once spend becomes material. Smaller specialist mandates can close through partner relationships and a statement of work; larger change programmes tend to involve competitive pitch processes, framework call-offs or formal RFP routes. Typical buyers look for evidence of comparable assignments, named delivery leads and a credible plan for transferring knowledge to internal teams.
What they buy
Most consulting practices tend to spend on tools and services that protect billable time, improve pipeline discipline and reduce delivery leakage. Common categories include CRM, proposal and document automation, time recording, resource planning, project accounting, knowledge management, research subscriptions, collaboration software and information-security controls. People costs also create demand for recruitment, contractor sourcing, assessment, learning, payroll, benefits administration and professional indemnity insurance. Larger practices may buy finance transformation, data warehousing, marketing operations and bid-support services, especially where sector teams need repeatable evidence packs for client pursuits.
Why and how to sell to them
Consulting buyers tend to evaluate suppliers when utilisation is slipping, proposal volume rises, senior hires arrive, a new practice is launched, or a larger client win exposes gaps in resourcing and governance. Public-sector framework work can trigger interest in bid support, compliance processes and audit-ready project records; corporate transformation work can trigger demand for better resource forecasting, security controls and delivery reporting. Outbound messages usually land better when they refer to margin leakage, partner time, proposal conversion, contractor dependency or client evidence requirements rather than generic productivity claims. The practical sell is lower friction around winning, staffing and proving the work.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
Also in London
Related directories
Frequently asked questions
How many consulting companies are there in London?
What counts as a consulting company in this list?
Which are the largest consulting companies in London?
What do consulting companies in London actually do?
How does London consulting compare internationally?
How is this list built and how fresh is the data?
How big are the typical consulting companies in London?
Are these mostly new or established consulting companies?
What SIC codes does this use?
What buying signals should I look for?
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