This selection of large UK startup incubators and accelerators shows a focus on technology, education, and sustainability. Blenheim Chalcot is a venture builder that invests in high-growth sectors. Ark is an international charity providing quality education. Entrepreneur First is a platform connecting co-founders and helping them raise funds. ZINC invests in founders building businesses that address critical challenges for people and planetary health.
Most of these organizations are based in London, with a notable cluster also in Cambridge. The entities here include established universities like Buckinghamshire New University and the Royal College of Art, alongside newer venture builders and accelerators founded in the 2010s, reflecting a mix of long-standing educational institutions and more recent initiatives supporting innovation.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Blenheim Chalcotblenheimchalcot.com
A venture builder investing in high-growth sectors by providing funds, expertise, and infrastructure to build profitable, scalable companies globally |
2,370 | |||
| 2 |
Arkarkonline.org
International charity providing quality education through a network of schools and innovative ventures to improve life choices for youth. |
2,039 | |||
| 3 |
Modelstartuply.net
Supporting tech startups in the UK with full-lifecycle services, custom programs, and connections in nine focus areas, without taking equity |
1,816 | |||
| 4 |
Buckinghamshire New Universitybucks.ac.uk
A well-established university offering a wide range of courses, services to industry, state-of-the-art facilities, and exclusive student experiences to enrich the student community |
1,772 | |||
| 5 |
Royal College of Artrca.ac.uk
Specialist postgraduate university offering art, design, architecture, and humanities programs focused on innovation, research, and global challenge solutions. |
1,452 | |||
| 6 |
Cambridge Judge Business Schooljbs.cam.ac.uk
Educates business leaders through world-class faculty, offering MBA, Master of Finance, Executive MBA, MAcc, PhD, MPhil, undergraduate, and executive education courses. |
925 | |||
| 7 |
Entrepreneur Firstjoinef.com
A platform bringing exceptional individuals together to meet co-founders, develop ideas, and raise funds for startups, with backing from top tech founders and investors |
766 | |||
| 8 |
Cambridge Institute for Sustainability Leadership (CISL)cisl.cam.ac.uk
Develops industry leadership, sector pathways, and viable solutions to transform markets for a sustainable future. Works with leaders to accelerate action and transition. |
465 | |||
| 9 | 420 | ||||
| 10 |
TTP Groupttpgroup.com
A group of technology-focused businesses developing breakthrough products, applying innovations, and creating new technologies to help companies thrive |
394 | |||
| 11 |
NHS Clinical Entrepreneur Programmenhscep.com
Supports healthcare staff with skills and knowledge to develop and spread innovation, benefiting patients, the public, and the NHS. |
389 | |||
| 12 |
Connected Places Catapultcp.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 |
320 | |||
| 13 |
IMAGINEimagine.one
IMAGINE is a collective founded in 2019 to drive systemic change through transformational leadership and innovation in climate action and social equity |
310 | |||
| 14 |
Digital Catapultdigicatapult.org.uk
Accelerate deep technology adoption by partnering with businesses, investors, and academia to create market pathways and support UK innovation growth. |
307 | |||
| 15 | 283 | ||||
| 16 |
Energy Systems Catapultes.catapult.org.uk
Specialists in Net Zero energy innovation, supporting clean tech innovators and shaping the future energy system across various sectors |
273 | |||
| 17 |
Virgin StartUpvirginstartup.org
Offers funding up to 25k per co-founder, provides a community platform for connection and learning, and hosts free monthly events to inspire and network with other founders. |
250 | |||
| 18 | 223 | ||||
| 19 |
Transport Systems Catapultcp.catapult.org.uk
Driving Intelligent Mobility by promoting emerging technologies for smarter, greener, and more efficient transportation globally, with a focus on collaboration and innovation |
219 | |||
| 20 |
Satellite Applications Catapultsa.catapult.org.uk
An innovative technology company empowering businesses with space-based solutions, driving growth in the global space market with a dynamic team |
203 | |||
| 21 |
UDudmusic.org
UD nurtures and supports Black and culturally diverse artists, providing industry-led events, artist development, and employment support programs to foster excellence and opportunities |
184 | |||
| 22 |
Oxford University Innovationinnovation.ox.ac.uk
A technology transfer organization supporting University of Oxford staff and students in maximizing research impact for social and economic benefit |
183 | |||
| 23 |
StartupLanesstartuplanes.com
Provides comprehensive services from idea to IPO for startups, including legal, financial, marketing, and funding, reducing costs and increasing revenue across 15 countries. |
172 | |||
| 24 | 153 | ||||
| 25 |
NATO DIANAdiana.nato.int
Locates, accelerates dual-use innovation, provides technology developers with resources, networks, expertise to address critical defense and security challenges, creates a peaceful, resilient future. |
147 | |||
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 |
Rainmakingrainmaking.io
An innovation and venture development firm that partners with corporations and entrepreneurs to create, accelerate, and scale new businesses globally |
123 | |||
| 27 |
Oxford Innovationoxfordinnovation.co.uk
Supporting economic growth by providing business advice, finance, and space for entrepreneurs to innovate, collaborate, and raise the necessary funds for growth |
115 | |||
| 28 |
KERBkerbfood.com
Incubating and accelerating innovative street food businesses in London, bringing amazing food, talented people, and professional practices to transform city spaces and venues |
102 | |||
| 29 |
Outlier Venturesoutlierventures.io
A leading Open Metaverse accelerator program funding and supporting over 100 Web3 startups annually, focused on DeFi, NFTs, and blockchain infrastructure |
101 | |||
| 30 |
Health Innovation Kent Surrey Sussexhealthinnovation-kss.com
Facilitating partnerships between healthcare organizations, academia, industry, and local authorities to drive innovation, improve health outcomes, and foster economic growth |
95 | |||
| 31 |
Founders Factoryfoundersfactory.com
Founders Factory builds and funds startups with support, access to industry leaders, and operational expertise for high-growth companies across various sectors |
94 | |||
| 32 |
Infosec Venturesinfosecventures.com
Incubates and scales cyber security innovators, solving inefficiencies, addressing big problems, and delivering high return on investment for customers. |
94 | |||
| 33 |
Tomorrow Londontomorrowltd.com
Fashion incubator providing sales, financial, and operational services for international brands through global showrooms, digital marketplaces, and distribution platforms in key fashion markets. |
92 | |||
| 34 |
The Lightning Groupfounderandlightning.com
Helps founders, startups, investors, and corporates build and scale ventures with product, talent, capital, and AI capability at the core. |
80 | |||
| 35 |
Imperial College Health Partnersimperialcollegehealthpartners.com
Specializing in healthcare innovation, Imperial College Health Partners collaborates with experts to address challenges and spread innovation across the health sector |
71 | |||
| 36 |
Barclays Innovation Hub powered by Eagle Labsuk.barclays
Global fintech ecosystem facilitating innovation and growth in financial services through physical and virtual locations, events, mentoring, and digital fintech programs |
58 | |||
| 37 |
Excelledia Venturesexcellediaventures.com
The company provides a range of enterprise solutions, invests in technology advancements, and supports startups in building and scaling ventures across various sectors |
56 | |||
| 38 |
Indieindie.tech
Startup studio specializing in developing brand platforms in music and media tech Focused on creating innovative solutions in the industry |
47 | |||
| 39 |
Wee Tattie Studios
A Scotland-based game studio collaborating with developers globally to create innovative gaming experiences and supporting emerging game developers |
42 | |||
| 40 |
NBT (Next Big Thing)nbtdigital.com
A global growth consultancy firm with strategic partnerships, offering services, training, and products to startups, scaleups, and enterprises worldwide |
39 | |||
| 41 |
Plus X Innovationplusxinnovation.com
The company creates collaborative workspaces and offers support to businesses focused on driving positive impact through innovative programs and events |
36 | |||
| 42 |
Seraphim Spaceseraphim.vc
Specialist investor in SpaceTech, supporting over 100 SpaceTech companies globally, making it the most prolific SpaceTech investment group. |
33 | |||
| 43 |
Coinweb Labscoinweblabs.io
A platform solving blockchain issues by creating collaborative, connected, and accessible technology for all Contact hello@coinwebio or visit wwwcoinwebio |
31 | |||
| 44 |
FinTech Innovation Lab Londonfintechinnovationlab.com
The FinTech Innovation Lab London is an accelerator program fostering collaboration between financial institutions and tech companies to develop innovative solutions |
29 | |||
| 45 |
Memcrabmemcrab.com
A turnkey Web&App solution provider specializing in eCommerce, business revenue maximization, and digital solutions for retailers, educational institutions, fintech, and banking companies |
28 | |||
| 46 |
Tenity (prev. Hackquarters)tenity.com
A startup accelerator and corporate innovation partner in London & Istanbul, supporting disruptive technologies by providing talent, support, and experience Apply/invest/support for collaboration |
28 | |||
| 47 |
Future Worldsfutureworlds.com
On-campus startup accelerator helping entrepreneurs with ideas, providing advice, funding, global showcasing, networking, and inspiring next-generation entrepreneurs in a West Coast US culture. |
26 | |||
| 48 | 
Startup Foundryorg.uk
A leading startup studio offering resources and expertise to help entrepreneurs build, launch, and grow successful startups through various services |
25 | |||
| 49 | 24 | ||||
| 50 |
University of Southampton Science Parkscience-park.co.uk
A leading science park in Hampshire offering high-quality office and lab space in a prime location, recognized as a top commercial landlord |
23 | |||
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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 11, 2026.
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