Meet the companies with game-changing solutions to address the climate emergency




Cambridge Cleantech is delighted to announce the final shortlist for its high-profile investment event Cleantech Venture Day, which will take place online on Thursday 21st October 2021.




From floating solar platforms to self-healing concrete and zero emission delivery: meet the companies with game-changing solutions to address the climate emergency at our Cleantech Venture Day

With COP26 just around the corner, there has never been a more crucial time to support climate-positive technologies and Cleantech Venture Day offers investors the opportunity to meet some of the most game-changing companies in the sector.

“Ever since Cambridge Cleantech started running Cleantech Venture Days in the UK, I have been captivated by the quality of the investment-ready and innovative companies that apply each year. The 23 companies pitching this time represent the top of the class in in sectors ranging from clean energy and circular economy to transport and smart buildings, presenting a fantastic commercial opportunity for sustainability-focused investors,” says Martin Garratt, CEO of Cambridge Cleantech.

Meet the companies that made the cut out of over 100 applications:



Kubos Semiconductors  Material technology to improve LED performance


Mimicrete Ltd Developing self-healing concrete


R8tech AI-based software to increase the property’s energy efficiency


ISCLEANAIR Air Pollution Abatement (APA) technology


Zedify  Zero emission delivery operators


Zicon Limited High quality, low carbon materials


Focal Sun Decentralised hydrogen production via solar-to-hydrogen work


Geyser Batteries Oy Batteries based on water-based electrolyte


Global OTEC Floating platform that converts solar energy into power


Hydrologiq Hydrogen generator procurement, planning and management platform


STAG-Tech Clean electricity for emerging markets


Sunswap Battery and solar powered refrigeration units


Bio-Sep Limited Converts by-products of forestry operations into sugars, cellulose and lignin


Circla E-commerce platform with a unique closed-loop reuse and refill packaging system


Hope Resources Ltd Converts carbon based waste into Syngas


Low Sulphur Fuels Ltd Converts hydrocarbon into useful by-products for biofuels and specialty chemicals


PuriFire Labs Convert waste into value-added products such as animal feed, biofuel, and biochar


Radiant Matter Replace petrochemicals used in textiles with naturally degradable materials


Ripple Energy Clean energy ownership platform


Solaris Photonics Solar Energy Technology


SpinDrive Active magnetic bearings


Steamology  Zero emission diesel engine replacement


Zaphiro Helps integrate clean energy in the grid

“I am always excited to see the range of new businesses that apply for Cleantech Venture Day, and proud to see quite a few familiar ones participating! Allia and Cambridge Cleantech work closely on the crucial agenda to bring new solutions to the climate crisis, and events like these are rare glimpses into a potential clean, green future,” said Emma Mee, Programme Manager at Allia Future Business Centre and one of the judges at Cleantech Venture Day.

Previous companies that have pitched and successfully raised investment include Airex, Cheeky Panda, Oxwash, 8Power and Echion Technologies. At our last edition in March, we facilitated over 60 one-to-one meetings with start-ups that were requested by investors, and many of these meetings led to successful outcomes for both parties. This is the fifth year running that Cambridge Cleantech is hosting Cleantech Venture Day in the UK.


Along with pitches from the start-ups, we will be hearing from keynote speaker Dr Stephanie Hussels, Director of the Bettany Centre for Entrepreneurship. Dr. Hussels has a passion for early stage and growth companies and headed Cranfield University’s Business Growth Programme, the longest established owner-manager programme in the UK.

This event would not have been possible without the support of our partners Oxfordshire Greentech, Clean Growth UK, Business Isle of Man, J A Kemp, Granted, Allia Future Business Centre, Birketts, Consensus Business Group, KISS, Wallonia and GreenWin, Catax, Cheeky Panda, S-Tech, and Yangzhou Innovation Centre.

Investors who have registered for the event will be able to preschedule meetings with startups. Contact us at if you would like to book a session with one of the pitching companies.


Notes to Editor

Cleantech Venture Day

Cleantech Venture Day is a bi-annual pitching-and investment day where 24 of the most innovative climate-positive companies from the UK and beyond present their ideas to experienced investors and financiers.


Cambridge Cleantech

Cambridge Cleantech connects innovators, corporates, academics, SMEs and investors for a smarter, more sustainable future. As a leading membership organisation, we are a powerful catalyst in the cleantech sector responding to global sustainability challenges.


For more information contact:

Cinthya Anand, Communications Manager T: 07561 466458


More news from Cambridge Cleantech