These UK-based online marketplaces are generally large, established companies, with a significant concentration in London. Edutech, for example, is a London-based official Google for Education Partner. Deliveroo, founded in 2013, is a global food delivery service. Debenhams is a British heritage brand in retail, and OnlyFans, founded in 2016, is a platform for content creators. FARFETCH, established in 2007, is a global platform for luxury fashion. Lloyd's, founded in 1688, is a global marketplace for insurance. Christie's, founded in 1766, is a world-leading art and luxury business.
Many of these companies operate in software development, retail, and financial services, reflecting a diverse digital economy. The majority of the listed companies are headquartered in London, indicating the city's role as a central hub for online marketplace operations.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Edutechartbees.co.uk
A London-based company is an official Google for Education Partner, offering implementation, configuration, training, and support for Chromebooks and G Suite |
24,990 | |||
| 2 |
Deliveroodeliveroo.co.uk
A global food delivery service working with thousands of restaurants and riders to offer top-notch delivery experiences in multiple countries |
10,910 | |||
| 3 |
Debenhamsdebenhams.com
A British heritage brand offering over 3000 curated brands in beauty, fashion, and homeware, committed to exceptional customer experiences Ultimate online shopping destination |
6,917 | |||
| 4 |
Toptaltoptal.com
A network connecting top talent in business, design, and technology to help companies scale teams on demand with impressive growth |
6,417 | |||
| 5 |
OnlyFansonlyfans.com
A platform empowering creators to express themselves, monetize content, and build connections with fans in a safe and inclusive environment |
5,941 | |||
| 6 |
FARFETCHfarfetch.com
Global platform for luxury fashion connecting creators, curators, and consumers worldwide offering a unique shopping experience with over 1,300 luxury brands |
5,800 | |||
| 7 |
Workanaworkana.com
Leading Latin American platform connecting top talent with remote work opportunities, facilitating growth for companies and freelancers Over 600,000 companies and 3 million freelancers benefit from our services |
5,417 | |||
| 8 | 4,473 | ||||
| 9 |
Oil and Gas Job Search Ltdenergyjobsearch.com
Oil and Gas Job Search is a leading job site connecting over 35 million oil and gas professionals with industry opportunities globally |
4,341 | |||
| 10 |
PeoplePerHourpeopleperhour.com
Leading freelance marketplace empowering businesses to hire expert talent on-demand, allowing them to stay flexible and grow while supporting freelancers worldwide |
4,132 | |||
| 11 |
MyTutor.co.ukmytutor.co.uk
Online platform offering one-to-one tutoring to improve educational outcomes, focusing on accessibility and quality learning for all students |
3,933 | |||
| 12 |
Christie'schristies.com
A world-leading art and luxury business offering expert live and online auctions, bespoke private sales, art appraisal, financing, and education globally |
2,926 | |||
| 13 |
Lloyd'slloyds.com
Global marketplace connecting underwriters and brokers to provide insurance and reinsurance solutions through collective intelligence and risk-sharing expertise. |
2,501 | |||
| 14 | 2,440 | ||||
| 15 |
London Stock Exchangelondonstockexchange.com
Global financial marketplace providing extensive access to capital markets and liquidity across multiple asset classes for international businesses, governments, and investment funds. |
2,358 | |||
| 16 |
Zen Educatezeneducate.com
This company is revolutionizing education recruitment by saving schools money on agency fees, providing skilled staff, and offering a user-friendly online platform |
2,147 | |||
| 17 |
Taskrabbittaskrabbit.com
Connects people with Taskers for everyday home tasks like furniture assembly, handyman work, and moving help, creating a go-to team for easier daily life. |
1,896 | |||
| 18 |
GTAdiscover.hotelbeds.com
Connects travel providers with travel sellers globally via technology platform, increasing reach, revenue, and yield. Offers hotels, transfers, and activities. |
1,800 | |||
| 19 |
Autotradercareers.autotrader.co.uk
Leading UK automotive marketplace connecting buyers and sellers of cars, e-bikes, caravans, simplifying complex vehicle purchasing journeys. |
1,706 | |||
| 20 |
Skyscannerskyscanner.net
Helping travelers effortlessly explore the world for future generations to enjoy |
1,699 | |||
| 21 | 1,484 | ||||
| 22 |
HSS ProService Marketplacehssproservice.com
Online platform connecting buyers and sellers of building equipment and materials, offering easy ordering, off-hire, and sustainability tracking. |
1,335 | |||
| 23 |
Prolificprolific.com
Prolific helps research teams gather high-quality human data at scale through a simple platform for AI model development and important research |
1,317 | |||
| 24 |
Baby Sitterbabysits.uk
This company specializes in digital marketing for childcare businesses, helping attract new customers, increase online presence, and drive growth through various platforms |
1,312 | |||
| 25 |
Cazoocazoo.co.uk
The company aims to revolutionize car buying and selling in the UK with a seamless online experience featuring selection, value, and transparency |
1,300 | |||
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. | |||||
| 26 |
Rightmoverightmove.co.uk
Market leader in helping home buyers and renters find their next home through innovative tech solutions, with a focus on maximizing audience reach for property professionals |
1,242 | |||
| 27 |
AnyVananyvan.com
AnyVan uses technology and innovation to improve delivery and moving processes, providing efficient, affordable, and environmentally friendly services to millions of customers |
1,177 | |||
| 28 |
Trainlinethetrainline.com
A leading platform for rail and coach travel, offering seamless booking, real-time information, and environmentally sustainable options from 270+ carriers in 45 countries |
1,168 | |||
| 29 |
Villagevillage.co
Fostering local connections for buying, selling, and supporting each other to create a more sustainable and community-driven world π‘β»οΈπ |
1,128 | |||
| 30 |
Cometcomet.co.uk
An online electrical retailer offering great deals on technology and appliances from top brands like Samsung, Sony, Apple, and more |
1,121 | |||
| 31 |
Government Commercial Agencycrowncommercial.gov.uk
The company is the UK's largest public procurement organization, assisting government buyers in purchasing a wide range of products and services efficiently and cost-effectively |
1,035 | |||
| 32 |
All Cruise Jobsallcruisejobs.com
Leading job board for cruise line industry vacancies, offering opportunities to work on cruise ships through wwwallcruisejobscom |
1,009 | |||
| 33 |
Indeed Flexindeedflex.com
Revolutionary app connecting job seekers with temporary work, offering flexibility in where, when, and how they work while supporting employers with high-quality workers |
978 | |||
| 34 |
Tutorfultutorful.co.uk
An online education company in the UK and ROI, connecting students with rigorously vetted tutors for personalized learning experiences in various subjects |
956 | |||
| 35 |
Amberamberstudent.com
Leading student accommodation platform, facilitating housing search for over 1 million students near 800+ universities in 300+ cities with rapid growth and positive work culture |
955 | |||
| 36 |
Treatwelljobs.treatwell.com
Connects people with beauty and wellness salons across 13 countries using smart salon management software, making treatments accessible and helping businesses grow. |
918 | |||
| 37 |
Freshafresha.com
Online marketplace connecting consumers with beauty and wellness businesses, offering appointment booking, payment, and comprehensive business management software. |
903 | |||
| 38 |
Computrabajocomputrabajo.com
The company is a leading online job portal in Latin America, with a presence in 19 countries and a top platform for job search with millions of monthly visits |
897 | |||
| 39 |
CV-Librarycv-library.co.uk
Provides extensive recruitment services including CV database access, job posting options, and innovative hiring solutions for employers. |
896 | |||
| 40 |
Bonhamsbonhams.com
A prestigious international auction house specializing in fine art, antiques, motor cars, and jewelry Founded in 1793 and highly regarded in the industry |
895 | |||
| 41 | 853 | ||||
| 42 |
HSE Jobshsejobs.co.uk
Recruitment advertising company specializing in Health and Safety, Risk Management, and Environmental sectors, connecting job seekers with employment opportunities and recruiters with professionals |
821 | |||
| 43 |
Livingston Researchlivingston-research.com
An EdTech company providing personal education support through technology to students globally with a diverse team and focus on development and challenge |
811 | |||
| 44 |
Betfairbetfair.bet.br
Innovative, disrupting online betting exchange focused on creating fair marketplace for customers, with top sports betting and gaming products |
794 | |||
| 45 |
Humlyhumly.co.uk
An international supply education company empowering educators with career control through a next-gen app, revolutionizing education by connecting teachers and schools seamlessly |
720 | |||
| 46 |
Aviation Job Searchaviationjobsearch.com
The leading aviation job site offering the latest jobs worldwide, along with career resources, expert insights, and a professional forum |
695 | |||
| 47 | 684 | ||||
| 48 |
HungryPanda Ltd ηη«ε€εhungrypanda.co
A leading overseas Chinese food delivery company expanding globally, offering Asian food delivery, groceries, vouchers, and recognized in tech industry rankings |
681 | |||
| 49 |
BSW Groupthebswgroup.co.uk
Largest UK forestry business with divisions in nurseries, management, sawmilling, timber manufacturing, and energy, part of binderholz group. |
677 | |||
| 50 |
Freelance Architectfreelancehubs.com
Hire freelance architects for project-based work, paying only for hours worked Find skilled freelancers for affordable architecture services on our platform |
668 | |||
Turn this list into pipeline
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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 13, 2026.
More company lists in the United Kingdom
- The largest companies in the United Kingdom 36,547
- 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
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- 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
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- Subscription businesses in the United Kingdom 1,077
- Distributors and wholesalers in the United Kingdom 1,060