# Top 30 Research Services companies in London
Tamtam tracks 38 Research Services companies headquartered in London. This list ranks the 30 largest by number of employees on LinkedIn, led by UCL, King's College London and Imperial College London. Their median headcount is 486. Half of them were founded in 2008 or later.
These London-based companies are primarily large research institutions and universities, alongside a significant presence of AI and biomedical research firms. Notable organizations include UCL, King's College London, and Imperial College London, which are major multidisciplinary universities. Google DeepMind specializes in advancing artificial intelligence, while The Francis Crick Institute and The Institute of Cancer Research focus on biomedical and cancer research respectively.
The data shows a strong concentration of academic and medical research, with several institutions founded in the early 20th century. However, there is also a cluster of more recent establishments, such as Google DeepMind (2010), The Francis Crick Institute (2011), and ElevenLabs (2022), indicating growth in AI and advanced biomedical fields.
π¬π§ London Β· 30 companies Β· Updated Nov 12, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [UCL](https://www.tamtam.ai/c/ucl) (ucl.ac.uk)
Leading multidisciplinary university in London, promoting academic excellence, inclusive education, and impactful research addressing real-world challenges. | Research Services | π¬π§ London | 24,678 | |
| 2 | [King's College London](https://www.tamtam.ai/c/king-s-college-london) (kcl.ac.uk)
Top-ranked university offering world-class education and research, fostering innovation and positive societal impact globally and locally. | Research Services | π¬π§ London | 20,705 | |
| 3 | [Imperial College London](https://www.tamtam.ai/c/imperial-college-london) (imperial.ac.uk)
Leading university specializing in science, medicine, engineering, and business, fostering interdisciplinary collaboration to advance knowledge and improve health. | Research Services | π¬π§ London | 18,233 | 1907 |
| 4 | [Google DeepMind](https://www.tamtam.ai/c/google-deepmind) (deepmind.google)
Advances artificial intelligence with breakthrough research. Solves complex problems like disease diagnosis, energy saving, and protein folding with safe, ethical AI. | Research Services | π¬π§ London | 9,665 | 2010 |
| 5 | [The Francis Crick Institute](https://www.tamtam.ai/c/the-francis-crick-institute) (crick.ac.uk)
Multidisciplinary scientists conducting innovative biomedical research to understand human health and disease, fostering discovery and future science leaders. | Research Services | π¬π§ London | 1,957 | 2011 |
| 6 | [The Institute of Cancer Research](https://www.tamtam.ai/c/the-institute-of-cancer-research) (icr.ac.uk)
Leading cancer research organization and postgraduate college focused on cancer discoveries, treatment, and education with a hospital partnership. | Research Services | π¬π§ London | 1,608 | 1909 |
| 7 | [ElevenLabs](https://www.tamtam.ai/c/elevenlabs) (elevenlabs.io)
It develops AI audio models for speech and sound effects, enabling content creation, localization, and accessibility for various industries. | Research Services | π¬π§ London | 1,291 | 2022 |
| 8 | [Institute of Physics](https://www.tamtam.ai/c/institute-of-physics) (iop.org)
The UK & Ireland's professional body and learned society for physics, promoting cooperation in physics worldwide | Research Services | π¬π§ London | 910 | 1874 |
| 9 | [National Centre for Social Research](https://www.tamtam.ai/c/national-centre-for-social-research-london) (natcen.ac.uk)
The National Centre for Social Research conducts independent, not-for-profit social research to give the public a voice in shaping impactful services | Research Services | π¬π§ London | 798 | 1969 |
| 10 | [Cochrane](https://www.tamtam.ai/c/cochrane-london) (cochrane.org)
A global network providing high-quality research summaries to empower healthcare decision-making, free from commercial influence for over 30 years | Research Services | π¬π§ London | 698 | 1993 |
| 11 | [Institute of Psychiatry, Psychology & Neuroscience](https://www.tamtam.ai/c/institute-of-psychiatry-psychology-and-neuroscience) (kcl.ac.uk)
A leading research and education center in Europe for psychiatry, psychology, and neuroscience, focusing on understanding, preventing, and treating mental and neurological conditions | Research Services | π¬π§ London | 676 | |
| 12 | [Veramed](https://www.tamtam.ai/c/veramed) (veramed.co.uk)
A customer-focused Clinical Research Organisation offering high-quality biostatistics and programming services for the pharmaceutical industry, with a focus on innovation and service excellence | Research Services | π¬π§ London | 609 | 2012 |
| 13 | [Omdia](https://www.tamtam.ai/c/omdia) (omdia.com)
Leading technology research and advisory group providing actionable insights for smart growth decisions Specializing in various tech markets for organizations worldwide | Research Services | π¬π§ London | 590 | |
| 14 | [The Alan Turing Institute](https://www.tamtam.ai/c/the-alan-turing-institute) (turing.ac.uk)
A UK institute focusing on data science and artificial intelligence research, providing advice to policy makers, facilitating collaboration, and attracting global leaders | Research Services | π¬π§ London | 549 | 2015 |
| 15 | [Berlin Institute of Technology (Technische UniversitΓ€t Berlin)](https://www.tamtam.ai/c/berlin-institute-of-technology-technische-universitat-berlin) (media7.net)
Leading technical university in Berlin, Germany, with a strong focus on research, teaching, and international partnerships, offering a wide range of academic disciplines and programs | Research Services | π¬π§ London | 486 | |
| 16 | [Legal 500](https://www.tamtam.ai/c/legal-500) (legalease.dev)
A leading publisher of legal market information, offering authoritative analysis and commentary through directories, magazines, journals, textbooks, and online resources since 1987 | Research Services | π¬π§ London | 428 | 1987 |
| 17 | [IB](https://www.tamtam.ai/c/ib) (weareib.co)
A behavioural strategy agency, using psychology to uncover reasons for customer and employee behavior, providing deep insights for business growth | Research Services | π¬π§ London | 426 | |
| 18 | [The British Academy](https://www.tamtam.ai/c/the-british-academy) (thebritishacademy.ac.uk)
Mobilizes humanities and social sciences to understand global challenges, invests in researchers, engages public with fresh thinking, and influences policy for everyone's benefit. | Research Services | π¬π§ London | 399 | 1902 |
| 19 | [Our Future Health UK](https://www.tamtam.ai/c/our-future-health-uk) (ourfuturehealth.org.uk)
A UK health research programme recruiting adult volunteers to develop new ways to prevent, detect, and treat diseases for better future health | Research Services | π¬π§ London | 387 | 2020 |
| 20 | [Health Research Authority](https://www.tamtam.ai/c/health-research-authority) (hra.nhs.uk)
This organization protects and promotes the interests of patients and the public in health research by simplifying regulation processes and increasing participation | Research Services | π¬π§ London | 378 | 2011 |
| 21 | [WEP Clinical](https://www.tamtam.ai/c/wep-clinical) (wepclinical.com)
A market-leading healthcare services company that creates treatment access solutions for patients worldwide through various programs and services | Research Services | π¬π§ London | 356 | 2008 |
| 22 | [Barts Cancer Institute (Queen Mary University of London)](https://www.tamtam.ai/c/barts-cancer-institute-queen-mary-university-of-london) (bci.qmul.ac.uk)
Internationally recognized cancer research institute focusing on early detection, innovative therapies, education, and community engagement to improve patient survival and understanding of cancer | Research Services | π¬π§ London | 332 | 2004 |
| 23 | [Connected Places Catapult](https://www.tamtam.ai/c/connected-places-catapult) (cp.catapult.org.uk)
An innovation accelerator specializing in cities, transport, and place leadership, connecting businesses and public sector leaders to drive growth and reduce carbon emissions | Research Services | π¬π§ London | 320 | 2019 |
| 24 | [Ovum](https://www.tamtam.ai/c/ovum) (omdia.tech.informa.com)
The company provides insights and analysis in a variety of industries Follow their new page for updates and information | Research Services | π¬π§ London | 167 | 1985 |
| 25 | [Institute For Fiscal Studies](https://www.tamtam.ai/c/institute-for-fiscal-studies) (ifs.org.uk)
An independent research institute informing public debate on economics through rigorous analysis, influencing policy-making and academic scholarship on a global scale | Research Services | π¬π§ London | 161 | 1969 |
| 26 | [Biochemical Society](https://www.tamtam.ai/c/biochemical-society) (biochemistry.org)
A society promoting molecular bioscience through scientific meetings, grants, policy work, and journal publications for researchers at all career stages | Research Services | π¬π§ London | 158 | 1911 |
| 27 | [International Growth Centre](https://www.tamtam.ai/c/international-growth-centre) (theigc.org)
This organization partners with policymakers in developing countries to drive inclusive and sustainable growth through innovative research and a global network | Research Services | π¬π§ London | 156 | 2009 |
| 28 | [OXON Epidemiology](https://www.tamtam.ai/c/oxon-epidemiology) (oxonepi.com)
A European CRO specializing in Real-World Evidence generation through observational studies, data analysis, and modeling for pharmaceutical and medical device companies worldwide | Research Services | π¬π§ London | 59 | 2008 |
| 29 | [Chartis Research](https://www.tamtam.ai/c/chartis-research) (chartis-research.com)
Provides in-depth research and analysis on risk technology to support improved risk management, governance, compliance, and informed business decisions. | Research Services | π¬π§ London | 33 | |
| 30 | [Huq Industries](https://www.tamtam.ai/c/huq-industries) (huq.io)
Provider of accurate mobility data intelligence enabling government, retail, real estate, and finance sectors to make informed strategic decisions confidently. | Research Services | π¬π§ London | 25 | 2014 |
## 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 London
- [The largest companies in London](https://www.tamtam.ai/l/largest-companies-london) (12,882)
- [Multinational companies in London](https://www.tamtam.ai/l/multinational-companies-london) (3,652)
- [Financial Services companies in London](https://www.tamtam.ai/l/financial-services-companies-london) (1,862)
- [Financial services firms in London](https://www.tamtam.ai/l/financial-services-firms-london) (1,824)
- [SaaS companies in London](https://www.tamtam.ai/l/saas-companies-london) (1,615)
- [Professional services firms in London](https://www.tamtam.ai/l/professional-services-firms-london) (1,248)
- [Software Development companies in London](https://www.tamtam.ai/l/software-development-companies-london) (1,217)
- [Retail chains in London](https://www.tamtam.ai/l/retail-chains-london) (942)
- [IT Services and IT Consulting companies in London](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-london) (693)
- [Companies with a mobile app in London](https://www.tamtam.ai/l/companies-with-mobile-app-london) (667)
- [Consulting firms in London](https://www.tamtam.ai/l/consulting-firms-london) (648)
- [IT services companies in London](https://www.tamtam.ai/l/it-services-companies-london) (607)
- [Subscription businesses in London](https://www.tamtam.ai/l/subscription-businesses-london) (544)
- [Venture capital and private equity firms in London](https://www.tamtam.ai/l/vc-and-private-equity-firms-london) (539)
- [Marketing and communications agencies in London](https://www.tamtam.ai/l/marketing-agencies-london) (533)
- [Retail Apparel and Fashion companies in London](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-london) (498)
- [Advertising Services companies in London](https://www.tamtam.ai/l/advertising-services-companies-london) (480)
- [Companies with in-house R&D in London](https://www.tamtam.ai/l/r-and-d-companies-london) (477)
- [AI companies in London](https://www.tamtam.ai/l/ai-companies-london) (456)
- [Investment Management companies in London](https://www.tamtam.ai/l/investment-management-companies-london) (452)
- [Hotel and hospitality groups in London](https://www.tamtam.ai/l/hospitality-groups-london) (445)
- [Luxury brands in London](https://www.tamtam.ai/l/luxury-brands-london) (428)
- [AI-native companies in London](https://www.tamtam.ai/l/ai-native-companies-london) (407)
- [E-commerce companies in London](https://www.tamtam.ai/l/ecommerce-companies-london) (384)
## The same list elsewhere in United Kingdom
- [Research Services companies in the United Kingdom](https://www.tamtam.ai/l/research-services-companies-united-kingdom) (120)
- [Research Services companies in England](https://www.tamtam.ai/l/research-services-companies-england) (100)
## The same list elsewhere
- [Research Services companies in the world](https://www.tamtam.ai/l/research-services-companies-in-the-world) (2,651)
- [Research Services companies in Europe](https://www.tamtam.ai/l/research-services-companies-in-europe) (1,669)
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Source: https://www.tamtam.ai/l/research-services-companies-london