These companies are primarily IT services and IT consulting firms, alongside some business consulting and content solution providers, operating in the United Kingdom. They range from large established groups to mid-sized firms, with a focus on digital transformation, AI integration, and technology-driven business solutions. Many of these companies serve global clients across various industries.
Among them, RWS Group specializes in content solutions, Endava drives innovation with digital solutions, Mastek is an enterprise digital and cloud transformation partner, and Qualitest focuses on AI-powered quality engineering. A notable pattern is the strong concentration of headquarters in London, indicating the city's role as a hub for AI-related services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 13,957 | ||||
| 2 |
Endavaendava.com
The company leverages technology and expertise to drive innovation and transform businesses with customized digital solutions across industries |
9,559 | |||
| 3 |
Mastekmastek.com
Enterprise digital and cloud transformation partner delivering solutions in digital experience, cloud, data, automation, AI, and managed services globally. |
6,396 | |||
| 4 |
Qualitestquality-ai.com
Global leader in AI-powered Quality Engineering services, specializing in superior customer experience, accelerated release velocity, and tailored solutions for various industries |
6,088 | |||
| 5 |
Photonphoton.com
A leading digital agency working with Fortune 100 companies, integrating strategy consulting, creative design, and technology to drive digital initiatives at scale |
5,867 | |||
| 6 |
Accenture UK & Irelandaccenture.com
A global professional services company leveraging technology, innovation, and industry expertise to drive digital transformation and deliver tangible outcomes for clients worldwide |
4,101 | |||
| 7 | 3,994 | ||||
| 8 |
OLIVER | The Brandtech Groupoliverinside.ai
Design and operate bespoke in-house agencies and ecosystems for brands, driving business growth and innovative marketing solutions globally. |
3,870 | |||
| 9 |
Abacusabacus-global.com
Providing industry-focused, technology-driven business transformation solutions through consulting, systems integration, and outsourcing to help clients lead their industries. |
3,703 | |||
| 10 |
Ciklumciklum.com
Global digital solutions company providing tailored solutions for Fortune 500 and fast-growing organizations worldwide, leveraging emerging technologies for various clients |
2,972 | |||
| 11 |
Equal Expertsequalexperts.com
A global team of experienced consultants who help create leading digital products and services, focusing on data-driven decisions, user-centric design, and sustainable scaling |
1,491 | |||
| 12 |
K2 Partnering Solutionsk2partnering.com
Providing consulting, recruitment, training, and platform solutions to support companies in enterprise applications, AI, and cloud technology projects. |
1,383 | |||
| 13 |
Godel Technologies Europegodeltech.com
A leading technology partner in Europe, Godel offers agile software engineering services to bridge UK tech skills gap for clients |
1,330 | |||
| 14 |
Merit Data & Technology Indiameritdata-tech.com
A company that provides marketing data, product data, customized software, and marketing automation to help B2B brands embrace the challenges of the future |
1,128 | |||
| 15 |
Facultyfaculty.ai
The company develops and implements safe AI systems integrating human and artificial intelligence for optimized performance |
1,073 | |||
| 16 |
Kubrick Groupkubrickgroup.com
Deliver data and AI solutions reducing costs, enhancing risk resilience, uncovering revenue, and training diverse specialists for technology partnerships. |
942 | |||
| 17 |
Elixirrelixirr.com
A global consulting firm with diverse expertise in business challenges, innovation, and change management, driven by entrepreneurial spirit and ownership mindset |
902 | |||
| 18 |
Bell Integrationbell-integration.com
Provides technology consultation and managed services enabling organizations to transform IT capabilities, enhancing productivity, and cost efficiency. Specializes in IT services and infrastructure. |
885 | |||
| 19 |
VML Enterprise Solutionsvml.com
Global company offering end-to-end solutions for retailers and brands to drive transactions and customer loyalty through commerce, technology, data, and experience |
806 | |||
| 20 | 752 | ||||
| 21 | 718 | ||||
| 22 |
JMAN Groupjmangroup.com
Specializes in maximizing value creation activities for private equity funds and their portfolio companies, addressing investment decisions and value creation initiatives with real-time data. |
686 | |||
| 23 |
Toppan Digital Languagetoppandigital.com
Toppan Digital Language provides innovative language solutions for high-risk content, serving top companies globally with specialized teams and cutting-edge technology |
661 | |||
| 24 |
Roboyoroboyo.global
Leading provider of AI-powered automation solutions. Helps organizations embed intelligence into their business, aligning people, processes, and technology for measurable outcomes and growth. |
614 | |||
| 25 |
Sparta Globallinktr.ee
Partners with organizations to build technology, change, data, and AI capability, providing AI native consultants, upskilling programs, and expert support for AI oversight and transformation. |
583 | |||
| 26 |
Telef贸nica Tech (EN)telefonicatech.uk
Specialist provider of integrated technology solutions including cybersecurity, cloud, data, AI, business applications, and digital workplace services. |
557 | |||
| 27 |
Zenitechzenitech.co.uk
Zenitech partners with clients to create and implement innovative technologies that drive business growth, improve customer experience, and accelerate time to market |
551 | |||
| 28 |
SPD Technologyspd.tech
Custom software development & IT consulting Expertise in Fintech, E-commerce, Telecom, and more Award-winning solutions for big brands and startups worldwide |
530 | |||
| 29 |
Kovaion Consultingkovaion.com
Provides Agile, Intelligent, Personalized Solutions & Services, specializing in PeopleSoft, Oracle HCM/ERP Cloud, Taleo, Application Development and KovaionAI Agents. |
500 | |||
| 30 |
Scale Factory (formerly Ten10)ten10.com
The company provides diverse tech talent through their Tech Academy and offers cutting-edge technology consultancy for tailored solutions and services |
468 | |||
| 31 |
Hitachi Solutions UKhitachi-solutions.co.uk
Provides business-tailored services and solutions for transformation journeys, including finance, low code, AI, and data-based transformation, offering advisory and application support. |
462 | |||
| 32 | 456 | ||||
| 33 |
CreateFuturecreatefuture.com
Providing expert software engineering, strategy, and design services to create digital products and solutions that address client challenges effectively. |
447 | |||
| 34 |
Acuvateacuvate.com
Empowers enterprises to accelerate next-gen transformation journeys using an AI-first approach, modernizing, automating, and transforming applications for agility in the digital world. |
444 | |||
| 35 |
Infinity Questi-q.co
Design, build, run AI platforms, data architecture, digital engineering for organisations in UK, Europe, Americas. |
437 | |||
| 36 |
Softwiresoftwire.com
Help organizations use technology to deliver meaningful outcomes and positive impact, solving problems and anticipating future challenges with bespoke solutions in regulated verticals. |
426 | |||
| 37 |
ZONE3000zone3000.com
A leading IT employer in Ukraine with over 20 years of experience in software development, technical support, and long-term partnerships |
413 | |||
| 38 | 412 | ||||
| 39 |
Solirius Replysolirius.com
An independent software and technology consultancy delivering complex solutions by focusing on client's business needs through technology consulting, software engineering, delivery consulting, and business consulting services |
409 | |||
| 40 |
InstaDeepinstadeep.com
It specializes in decision-making AI, applying machine learning across various sectors, and focuses on knowledge sharing and nurturing talent. |
405 | |||
| 41 |
IBUibugroup.co.uk
A trusted global partner delivering customer-centric IT consulting and services with proven expertise and quality standards for clients worldwide |
395 | |||
| 42 |
PURVIEWpurviewservices.com
Providing IT engineering and talent solutions to mid-market and Fortune 500 companies globally, with expertise in data, AI, cloud, and cybersecurity services. |
395 | |||
| 43 |
Systangosystango.com
Builds governed AI platforms for fintech, professional services, and PE-backed SaaS companies, accelerating digital transformation journeys with measurable outcomes and efficiency gains. |
388 | |||
| 44 | 384 | ||||
| 45 |
Endava Europeendava.com
A mobile product development company founded in 2008, specializing in design, software development, marketing, and user engagement services for various clients worldwide |
377 | |||
| 46 |
Talan - UKtalan.com
Consulting group specializing in AI and data solutions to drive sustainable innovation and transformation across energy, health, finance, and public sectors. |
366 | |||
| 47 |
Mitra AImitrai.com
Boosts client productivity with AI and data strategies, modernizing cloud solutions, enterprise integration, and workflow automation for improved efficiency and customer experience. |
332 | |||
| 48 |
Mallow Technologies Private Limitedmallow-tech.com
The company specializes in developing quality mobile and web applications, helping clients bring their ideas to life with creativity, integrity, and innovation |
329 | |||
| 49 |
BIP UKbip-group.com
International consultancy specializing in business and technology solutions, committed to creating sustainable value for clients and society through human-centered strategies and corporate social responsibility |
320 | |||
| 50 |
Kin + Carta Europekinandcarta.com
Global digital transformation consultancy empowering clients with technology, data, and experience to accelerate innovation, modernize systems, and drive growth sustainably |
315 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 51 |
Datatonicdatatonic.com
A top cloud data + AI consultancy helping ambitious businesses achieve success through innovative cloud technologies and impactful solutions |
313 | |||
| 52 |
Armakuniarmakuni.com
The company helps organizations leverage cloud-native technologies and processes to drive growth, increase efficiency, minimize risk, and accelerate delivery for sustainable success |
307 | |||
| 53 |
Valcon (prev. First Consulting UK)valcon.com
A full-service provider in consultancy, technology, data, and analytics, specializing in end-to-end transformations for clients across Europe with a human-centered approach |
295 | |||
| 54 |
Vertex Agilityvertexagility.com
Offers global digital consultancy, deep cloud, data, and software expertise, building tailored, scalable teams and cost-effective solutions for clients. |
280 | |||
| 55 |
Rolustechrolustech.com
modernize systems, apply AI to workflows, build digital products, deliver AI-enabled CRM solutions, intelligent business applications, enterprise integrations, workflow automation, and scalable custom software |
272 | |||
| 56 |
Quantzigquantzig.com
Partners with businesses, provides data analytics and AI-powered solutions across various industries, and helps clients tackle challenges and optimize processes for growth opportunities. |
265 | |||
| 57 |
FWFfwfcompany.com
Provides intelligent automation professional services helping organizations improve efficiencies, reduce risk, and enhance experiences for global clients across various sectors. |
251 | |||
| 58 |
Digital Futuresdigitalfutures.com
A UK technology services and training company focused on improving diversity, increasing digital skills, and building high-performing tech teams |
251 | |||
| 59 |
CloudRockcloudrock.com
Specialist consultancy guiding customers through digital transformation, delivering HR, Finance, and CRM solutions across various sectors with expertise in multiple platforms |
246 | |||
| 60 | 246 | ||||
| 61 |
ML Consultingfreelancehubs.com
A team of data scientists and engineers specializing in machine learning offers custom solutions in areas such as big data visualization, computer vision, predictive analytics, and natural language processing |
246 | |||
| 62 |
Thorogoodthorogood.com
An independent consultancy specializing in end-to-end data, AI, and analytics solutions for major global brands across various industries |
245 | |||
| 63 |
Superchargesupercharge.io
Innovative partner with 200+ experts creating transformative digital solutions for leading companies, specializing in designing, engineering, and scaling digital products |
244 | |||
| 64 |
Data Intellectdataintellect.com
Data Intellect specializes in building complete-system solutions for various industries, transforming big data problems into smart data solutions for world-leading organizations |
233 | |||
| 65 | 223 | ||||
| 66 |
Merit Data & Technologymeritdata-tech.com
A data solutions company leveraging AI to empower clients, offering bespoke, globally compliant solutions for B2B intelligence and digital engineering |
213 | |||
| 67 |
LADERA TECHNOLOGYladeratechnology.com
A leading IT service company providing innovative solutions, project delivery, and business excellence through skilled technology specialists and customer-centric approach |
198 | |||
| 68 | 195 | ||||
| 69 | 195 | ||||
| 70 |
Bluprintxbluprintx.com
Global consultancy specializing in digital transformation solutions for enterprise growth, offering strategic consulting, professional services, and technology support in various fields |
189 | |||
| 71 |
FourNetfournet.co.uk
Providing secure digital transformation through AI technology, cloud services, cybersecurity, and consultancy to enhance operations and customer experiences. |
188 | |||
| 72 | 185 | ||||
| 73 |
Emvigo Technologiesemvigotech.com
A technology solutions provider focused on innovative ideas to simplify and improve people's lives, with offices in Kent, India, and Uganda |
184 | |||
| 74 |
VERVEvervevero.com
A global insights consultancy specializing in Human, Cultural, and Artificial Intelligence to provide dynamic solutions for any business challenge |
176 | |||
| 75 |
Arrk Grouparrkgroup.com
A global company specializing in AI engineering, business intelligence, cloud services, and app modernization to empower businesses to thrive |
168 | |||
| 76 |
Consultancy AIconsultantly.co.uk
A provider of AI solutions for consultancies to enhance client services and outcomes, offering tools to leverage the power of AI |
166 | |||
| 77 |
RedCompass Labsredcompasslabs.com
Expert delivery of ISO 20022 payments transformation projects using AI and micro-services to modernize programs while detecting financial crime and human trafficking. |
165 | |||
| 78 |
Cloud Directclouddirect.net
Helps organizations leverage Microsoft AI, modernize operations, and achieve business outcomes through strategic design, delivery, and managed services for secure, scalable solutions. |
160 | |||
| 79 | 157 | ||||
| 80 |
Acronotics Limitedacronotics.com
A specialized firm developing cutting-edge robotic process automation and artificial intelligence solutions to transform businesses, offering a unique AI-powered digital worker support tool |
156 | |||
| 81 |
Global App Testingglobalapptesting.com
Provides on-demand crowdtesting services using a global network of professional testers and real devices to enhance software quality assurance. |
149 | |||
| 82 |
Informed Solutionsinformed.com
Enterprise technology platforms and services for large-scale digital transformation in various sectors, providing award-winning data and AI-powered solutions for global clients |
149 | |||
| 83 |
Worktual AIworktual.ai
Revolutionary AI-powered platform enhancing communication and collaboration, streamlining meetings and integrating with other tools for a more efficient work life |
146 | |||
| 84 |
Tangenttangent.co
Global agency helping enterprise organizations create future-ready digital experiences with a focus on People, Planet & Purpose through strategy, design, and technology expertise |
138 | |||
| 85 |
Prospect
A sports tech company revolutionizing decision-making in sport by blending AI solutions and subject matter expertise for performance and commercial challenges |
134 | |||
| 86 |
Boston Limitedboston.co.uk
A leading provider of high-performance, power-optimized technologies, offering bespoke solutions in servers, storage, workstations, and clustered solutions with expertise in AI and ML |
131 | |||
| 87 |
DataEQdataeq.com
DataEQ leverages a human crowd to label unstructured data, training advanced AI for high-quality customer data to enhance CX and market monitoring |
128 | |||
| 88 |
ai4processai4process.com
The company provides premium services in Intelligent Automation technology using low-code platforms, specializing in 1:1 Customer Engagement and offering various products and training solutions |
127 | |||
| 89 |
Cloudaeoncloudaeon.co.uk
AI-based solutions for retailers and logistics, with expertise in planning, forecasting, margin protection, sales enhancement, waste reduction, analytics, and cloud services |
122 | |||
| 90 |
Telanatelana.com
A UK-based leading Google Cloud Services Provider helping enterprises innovate and transform with expertise in Data & AI, modernization, Workspace, and Maps |
118 | |||
| 91 |
opinov8opinov8.com
Custom software development provider delivering web and mobile applications alongside cloud strategy, data architecture, and big data analytics for various business industries. |
117 | |||
| 92 |
Perfect Artperfectart.com
A company specializing in guiding clients through successful business transformations, leveraging emerging technologies and market dynamics for digital progress |
117 | |||
| 93 |
hedgehog labhedgehoglab.com
Crafting digital solutions for a better world, developing innovative scalable systems, partnering with global brands, tackling complex technical challenges. |
113 | |||
| 94 |
Algomarketingalgomarketing.com
A global marketing operations and technology consultancy empowering marketers through algorithmic marketing, with AI and automation to drive impactful results |
113 | |||
| 95 |
Colibri Digitalcolibridigital.io
Specializing in AI, Big Data, and Cloud Computing, the company helps clients navigate emerging technologies to transform challenges into opportunities by analyzing data |
112 | |||
| 96 |
Profusionprofusion.com
This company specializes in leveraging data science to help businesses be more efficient and profitable through consultancy, innovation projects, and marketing campaigns |
110 | |||
| 97 |
Curve Analyticscurveanalytics.co.uk
A modern analytics consultancy providing strategic insights and data science capabilities to unlock new consumer opportunities for companies |
109 | |||
| 98 |
Dufraindufrain.co.uk
Consultancy specializing in data foundations, engineering, strategy, migration, BI, AI, and advanced analytics to deliver exceptional client outcomes. |
109 | |||
| 99 | 105 | ||||
| 100 |
Intuitaintuitaconsulting.com
Provides data, AI, and analytics consulting services to enterprises, focusing on strategy, technology, and delivery to drive performance and decision-making. |
103 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
More company lists in the United Kingdom
- The largest companies in the United Kingdom 36,548
- Multinational companies in the United Kingdom 7,458
- Financial services firms in the United Kingdom 3,711
- Financial Services companies in the United Kingdom 3,696
- Retail chains in the United Kingdom 3,289
- Professional services firms in the United Kingdom 2,706
- Software Development companies in the United Kingdom 2,600
- Manufacturers in the United Kingdom 2,159
- Companies with in-house R&D in the United Kingdom 1,930
- IT Services and IT Consulting companies in the United Kingdom 1,722
- Retail companies in the United Kingdom 1,596
- IT services companies in the United Kingdom 1,583
- Hotel and hospitality groups in the United Kingdom 1,461
- Companies with a mobile app in the United Kingdom 1,411
- Consulting firms in the United Kingdom 1,298
- E-commerce companies in the United Kingdom 1,246
- Hardware manufacturers in the United Kingdom 1,239
- Family-owned companies in the United Kingdom 1,224
- Hospitality companies in the United Kingdom 1,204
- Critical infrastructure operators in the United Kingdom 1,195
- Wellness and Fitness Services companies in the United Kingdom 1,151
- Retail Apparel and Fashion companies in the United Kingdom 1,085
- Subscription businesses in the United Kingdom 1,077
- Distributors and wholesalers in the United Kingdom 1,060