| # | 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 |
Pharma Solutions Hubmarketinglo.com
Specialized pharmaceutical marketing agency helping companies increase visibility, engagement, and leads through media planning, buying, strategy, PPC, creative, web design, content, and inbound marketing services |
15,120 |
| 3 |
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 |
| 4 |
Game Developerguden.org
Global community for game creation enthusiasts, from novices to experts, fostering learning, idea exchange, and mutual support in game development. |
9,799 |
| 5 |
Travel AIgudens.com
A leading travel & tourism marketing firm offering digital expertise, PR, content creation, design, data analysis, and brand strategy for various clients in the industry |
6,279 |
| 6 |
FinTech Foundryfinancemarketing.org
The company specializes in making finance more approachable through business consultation, brand strategy, and digital marketing services for financial services companies |
5,914 |
| 7 |
IONiongroup.com
Innovative company providing trading and workflow automation software to financial institutions, corporations, and governments, empowering decision-making and accelerating processes |
5,591 |
| 8 |
Shopify Developeronder.co.uk
A cloud-based e-commerce platform offering easy setup for online stores and expert development services to enhance advanced features and customer experiences |
5,461 |
| 9 | 4,473 | |
| 10 |
Simulation AImarketizon.com
Aviation Marketing is a specialized agency offering strategic marketing solutions to help aviation companies achieve their business goals through digital marketing strategies |
4,007 |
| 11 |
Playtechplaytech.com
Leading software and services supplier for the gambling industry, offering omni-channel solutions for online, mobile, and retail operations, including financial trading. |
3,735 |
| 12 |
Trip AImsdevs.org
This company specializes in creating unique and innovative website designs for travel operators and agencies to help them stand out and attract customers |
3,538 |
| 13 |
Healthcare AIthehealthmarketing.com
A next-generation healthcare marketing agency that crafts strategies based on market analytics to attract the right patients and grow client's medical practices |
3,377 |
| 14 |
Civicacivica.com
The company creates software solutions for delivering essential services to people globally |
3,116 |
| 15 |
Medical Practicemsdevs.org
Developing AI-powered solutions for medication management and patient care, improving adherence, reducing errors, providing personalized insights, and increasing healthcare efficiency |
3,092 |
| 16 |
Genius Sportsgeniussports.com
This company delivers technology and expertise to sports, betting, and media partners worldwide, enhancing data collection, fan engagement, and overall performance |
3,054 |
| 17 |
Support AImedia7.net
An ethical London-based SEO Agency offering sustainable organic SEO services, including content creation, link building, and transparent processes for guaranteed results |
2,858 |
| 18 |
Quantum Security Agencyorg.uk
Specialized restaurant marketing agency offering solutions to help restaurants thrive through social media management, content marketing, websites, and other marketing services |
2,842 |
| 19 |
David Gudendevelopers.google.com
It is a human capital solutions company that has rebranded to Quess Staffing |
2,712 |
| 20 |
PHP Developermsdevs.org
A global network promoting PHP technologies, supporting the PHP community through events, mentorship, and advocating for diversity and inclusion |
2,550 |
| 21 |
Women Developerguden.org
The company provides a platform for women to learn technical and professional skills, connect with others, and explore tech careers |
2,182 |
| 22 |
J.D. Edwardsagency.org.uk
This company provides software solutions for business management, specializing in enterprise resource planning (ERP) systems for various industries |
2,028 |
| 23 |
Canonicalcanonical.com
Publishing Ubuntu, popular enterprise Linux, open source delivery, cloud to edge, secure, cost-effective, global community, developer platform, remote-first company. |
2,001 |
| 24 |
Image AIthehealthmarketing.com
Revolutionizing image interaction with AI solutions for accessibility, usability, and enjoyment Offering image classification, generation, search, analysis services for various industries |
1,950 |
| 25 |
Angular Developerfinancemarketing.org
This company released Angular in 2016, a rewrite of AngularJS, for improved mobile development, modularity, and dependency injection in web applications |
1,870 |
| 26 |
Entertainment AIorg.uk
The company specializes in entertainment marketing, creating authentic connections, engaging storytelling, and strategic partnerships with influencers, celebrities, and opinion leaders |
1,693 |
| 27 |
MedTech AIguden.org
Expert in creating customized Android and iOS apps that meet your business needs, delivering quality solutions at competitive prices |
1,684 |
| 28 |
SMIagency.org.uk
Media consultancy firm specializing in social media, online PR, traditional PR, content management, and copywriting for small businesses to optimize their communication strategy |
1,662 |
| 29 |
Canadaharmonyfitness.ca
It provides professional consulting services, focusing on business solutions, strategy development, and operational improvements for various industries and clients. |
1,510 |
| 30 |
Dotsquaresdotsquares.com
It provides web and mobile technology solutions, specializing in design, development, and support for businesses of all sizes globally. |
1,493 |
| 31 | 1,484 | |
| 32 |
Windows App Developergudens.com
A company specializing in developing technically complex mobile apps for small, medium, and large enterprises, focusing on Windows-based IoT and cross-platform development |
1,480 |
| 33 |
Lifestyle AIorg.uk
A sophisticated brand inspiring fashion, art, photography, music, beauty lovers to try new things, stay informed, and be their best selves |
1,472 |
| 34 |
iOS App Development
The company specializes in developing custom mobile apps for Android, iOS, and Windows platforms, offering native, hybrid, and cross-platform solutions |
1,459 |
| 35 |
Xamarin Developerfreelancehubs.com
A business that operates independently, offering freelance services and self-employment opportunities without being tied to a specific company |
1,435 |
| 36 |
Builder.aibuilder.ai
The company offers customizable, fast, and cost-effective apps that fall between low-code and custom software categories |
1,351 |
| 37 |
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 |
| 38 |
Project Manager
Specializing in project management software, our company helps businesses efficiently plan, organize, and execute projects to achieve success |
1,164 |
| 39 |
Wolters Kluwer - Financial Services Solutionswolterskluwer.com
Provides expert software and information solutions for financial compliance, risk, regulatory reporting, and tax reporting to financial institutions globally. |
1,109 |
| 40 |
Brandwatchbrandwatch.com
It provides consumer intelligence, social media management, and influencer management to help businesses understand and engage with their customers effectively. |
1,100 |
| 41 |
Freelance Developer
Freelance developer with expertise in web, mobile, and backend development, cloud computing, DevOps, software testing Committed to delivering high-quality software solutions |
1,078 |
| 42 |
GP Surgerymysurgery.uk
Creating highly functional and visually appealing websites specifically designed for General Practitioner surgeries |
1,077 |
| 43 |
Deltatredeltatre.com
Global leader in fan-first digital experiences offering innovative products/services for sports, media, and entertainment, reaching over one billion minutes of digital content annually |
1,055 |
| 44 |
Medical practicethehealthmarketing.com
Innovative healthcare marketing agency providing digital marketing services for medical practices, healthcare businesses, and medical device companies to achieve success |
1,042 |
| 45 | 1,028 | |
| 46 |
Nonprofit AImarketinglo.com
A company specializing in website design and digital marketing for non-profit organizations, helping them raise awareness, generate income, and deliver services effectively |
1,021 |
| 47 |
OpenBetopenbet.com
Provides advanced betting technology, content, and services to operators, ensuring player protection, compliance, and innovative solutions for gaming and betting. |
1,020 |
| 48 |
Wearable App Developercodebees.org
This company specializes in developing wearable apps that are platform-independent, immersive, and seamlessly integrated across multiple devices for optimal user experience |
1,005 |
| 49 |
Linuxlinuxcommunity.com
Global community of users and developers working with Linux-based OS's, providing support, news, guides, and assistance on all things Linux and GNU/Linux |
985 |
| 50 |
VeriParkveripark.com
This global solutions provider enables financial institutions to enhance customer experiences, drive engagement, and increase revenue through intelligent customer experience solutions |
980 |
| 51 |
UX Developerguden.org
This company provides services or products that help people wake up or become more alert and energetic |
946 |
| 52 |
Data Developermsdevs.org
A data entry company offering outsource services like data conversion, processing, and quality results, with a focus on security and confidentiality |
944 |
| 53 |
Open Sourcelinuxcommunity.com
The company creates and promotes open-source projects and products, fostering collaborative participation, transparency, and community-oriented development in software |
924 |
| 54 |
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 |
| 55 |
Hotels AIgudens.com
A mobile app using AI to help users find, compare, and book hotels easily, with features like price comparison, room booking, reviews, and ratings |
918 |
| 56 |
Seeking a New Opportunityjobsify.org
The company provides project management and consulting services in the Legal and Medical software industries, focusing on customer satisfaction and collaboration |
908 |
| 57 |
Freshafresha.com
Online marketplace connecting consumers with beauty and wellness businesses, offering appointment booking, payment, and comprehensive business management software. |
903 |
| 58 |
Reward Gatewayrewardgateway.com
Helping companies enhance employee experience through benefits, rewards, recognition, and wellbeing to attract and retain top talent worldwide. |
900 |
| 59 |
Quantexaquantexa.com
Global platform connecting siloed systems to visualize complex relationships, providing single views of data for risk mitigation and strategic organizational decision making. |
895 |
| 60 | 877 | |
| 61 |
Compare the Marketcomparethemarket.com
This company helps make financial decisions easy for customers, while also prioritizing the well-being and development of their employees |
876 |
| 62 |
Anything Worldanything.world
The company brings 3D models to life quickly and easily using AI, with tools to animate, access assets, and build worlds |
833 |
| 63 |
SAIsaigroups.co.uk
The company offers a platform that uses machine vision AI on CCTV feeds to prevent theft, increase sales, and enhance operational effectiveness for retailers |
832 |
| 64 |
Synthesiasynthesia.io
AI-powered video creation platform enabling companies to produce videos in 140 languages, saving significant time and budget costs. |
800 |
| 65 |
Lead Forensicsleadforensics.com
It provides software that identifies anonymous website visitors, offering businesses valuable information to convert them into actionable sales-ready leads. |
800 |
| 66 |
GMAIL IT LTDaccounts.google.com
A technology company located in London, UK, specializing in IT services |
798 |
| 67 |
Executive AIagency.org.uk
International executive search firm specializing in identifying high-caliber senior executives through proactive, research-led approach for bespoke recruitment solutions with global reach |
737 |
| 68 |
Acturis Limitedacturis.com
Acturis is a leading tech provider for brokers, insurers, and MGAs globally, delivering digital transformation and driving innovation in the insurance industry |
714 |
| 69 |
Housefulhouseful.co.uk
Houseful is a leading provider of residential property software, data, and insights through a family of trusted brands driving progress in the property industry |
687 |
| 70 |
Digital Sciencedigital-science.com
AI-focused technology company providing innovative solutions to researchers, universities, funders, industry, and publishers advancing global research. |
678 |
| 71 |
Construction AImarketizon.com
A construction marketing agency specializing in increasing sales, raising enquiry levels, and connecting clients with key decision-makers in the industry worldwide |
665 |
| 72 |
ATG (Auction Technology Group)auctiontechnologygroup.com
A global technology company transforming the auction industry with leading online marketplaces for art, antiques, industrial, and commercial items worldwide |
661 |
| 73 |
Teciemteciem.com
Design and deliver treasury and capital markets software solutions supporting financial institutions worldwide with expert teams and award-winning products. |
657 |
| 74 |
CodeGen Internationalcodegen.co.uk
A global travel technology provider delivering innovative, scalable reservation systems to leading organizations worldwide, automating business processes with cutting-edge technology |
645 |
| 75 |
XML Developermedia7.net
Provides freelance services in various fields to clients, offering flexibility and individualized assistance based on specific needs and projects |
634 |
| 76 |
Team Internetteaminternet.com
A global internet solutions company operating in digital advertising and domain name management, offering privacy-safe advertorials, domain extensions, and web hosting services |
602 |
| 77 |
EcoOnlineecoonline.com
Delivers uncomplicated environment, health, and safety, chemical management, and ESG/sustainability technology solutions, safeguarding entire workforce through everyday operations and emergencies. |
602 |
| 78 |
Shopper.comshopper.com
Shoppercom provides creators with APIs for enabling commerce across platforms, facilitating product listings, endorsements, payments, and logistics for goods |
597 |
| 79 |
W Developerconsultantly.co.uk
Online platform showcasing news, trends, career opportunities, and company profiles in the national advisory and consulting industry across various sectors |
564 |
| 80 |
Medical Clinic Marketingthehealthmarketing.com
Specializing in healthcare marketing, our experts provide unmatched services to attract new patients, improve online presence, and grow healthcare practices effectively |
558 |
| 81 | 556 | |
| 82 |
Interior Designermarketizon.com
This architecture marketing agency helps firms improve online presence, enhance branding, and attract qualified leads to grow their businesses |
543 |
| 83 |
Forterroforterro.com
Forterro offers software solutions tailored to the industrial market, with a strong presence in Europe and a global network supporting 13,000+ businesses |
541 |
| 84 |
MONY Group plcmonygroup.com
Operates price comparison and cashback brands like MoneySuperMarket and Quidco, providing a tech-based platform to help UK households save money on everyday expenses. |
527 |
| 85 |
Thought Machinethoughtmachine.net
Development of a cloud-native, microservices-based core banking platform designed to replace legacy systems and modernize banking infrastructure. |
526 |
| 86 |
Fidessaiongroup.com
Global leader providing trading, investment, and information solutions for financial institutions Offering market data, analysis, and decision-making technology to drive success |
524 |
| 87 |
WordPress Developerguden.org
The company is a global community of passionate WordPress developers dedicated to nurturing, advancing, and empowering developers through learning and collaboration |
519 |
| 88 | 518 | |
| 89 |
Verticevertice.one
A spend optimization platform leveraging automation and machine learning to save companies up to 25% on SaaS and cloud costs |
509 |
| 90 |
Power Pages Developerfreelancehubs.com
The company offers data entry services including transcription, captioning, and data management for remote work with good earning opportunities |
496 |
| 91 | 495 | |
| 92 |
ComplyAdvantagecomplyadvantage.com
Empowers businesses to eliminate financial crime using AI, a unified platform, and risk intelligence for KYC, AML, and sanctions reviews. |
485 |
| 93 |
Investor AIorg.uk
Global community empowering educators and administrators to leverage Microsoft technology in education through collaboration, resources, and events Join us now! |
483 |
| 94 |
Crypto AIcrypto-analytics.com
Data analytics company specializing in defining strategy, sourcing data, and creating intuitive infographics to support business decisions |
479 |
| 95 |
Finovafinova.tech
The company provides cloud-based mortgage and savings software to support lenders, brokers, and financial institutions with fast implementation and open architecture |
468 |
| 96 |
Smart Communications.smartcommunications.com
Smart Communications offers a platform trusted by leading organizations for personalized, compliant customer conversations across all channels, simplifying processes and enhancing customer experiences |
456 |
| 97 |
Greshamgreshamtech.com
A global leader in financial services software, providing award-winning solutions for efficiency, risk management, compliance, and customer focus across industries worldwide |
455 |
| 98 | 454 | |
| 99 |
Acuvateacuvate.com
Global software service provider specializing in digital solutions and AI accelerators for enterprise-wide digital transformation, modernizing, automating, and supporting IT systems |
453 |
| 100 |
Cognismcognism.com
Accurate B2B sales intelligence and compliant contact data provider helping revenue teams find prospects, reach decision-makers, and build predictable sales pipelines. |
452 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 Oct 9, 2026.
More company lists in London
- The largest companies in London 11,159
- Financial Services companies in London 1,710
- SaaS companies in London 1,501
- IT Services and IT Consulting companies in London 585
- Investment Management companies in London 413
- AI-native companies in London 400
- Advertising Services companies in London 374
- Retail Apparel and Fashion companies in London 341
- Hospitality companies in London 306
- Retail companies in London 296
- Wellness and Fitness Services companies in London 292
- Technology, Information and Internet companies in London 273
- Business Consulting and Services companies in London 248
- Fintech companies in London 247
- Insurance companies in London 227
- Restaurants companies in London 226
- Non-profit Organizations companies in London 215
- Staffing and Recruiting companies in London 204
- Real Estate companies in London 189
- Entertainment Providers companies in London 184
- Venture Capital and Private Equity Principals companies in London 182
- Hospitals and Health Care companies in London 147
- Food and Beverage Services companies in London 145
- Venture-backed startups in London 144
The same list elsewhere in United Kingdom
- Software Development companies in the United Kingdom 2,448
- Software Development companies in Manchester 64
- Software Development companies in Cambridge 54
- Software Development companies in Edinburgh 38
- Software Development companies in Birmingham 29
- Software Development companies in Leeds 28
- Software Development companies in Newcastle upon Tyne 28
- Software Development companies in Glasgow 25