StartupBlink

71 Top startups in Southampton for November 2026

We rank i2O, AccelerComm and Curve Therapeutics in Southampton along with 68 other startups based on an algorithm that scores startups based on total investment, employee count, and quarterly website traffic. Southampton startup ecosystem ranks #312 globally and #20 in United Kingdom.

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Best Startups in Southampton for 2026

1st
i2O logo
i2OSB Score: 379

Since 2005, i2O has been committed to taking the weight off of water network management. With an experienced and knowledgeable team at the forefront of the business, i2O has been focused on developing intuitive pressure management solutions. The company has UK Headquarters in Southampton and offices in Malaysia, Spain and Colombia, with systems currently installed in 22 countries - being used by utilities all over the world to optimise network pressure. Our comprehensive hardware, software and integrated solutions are designed to support utilities in taking pressure management to the next level. These solutions are already saving more than 235 million litres (statistics needs updating) of water every single day, while supporting utilities in achieving the following: ● a reduction of 20% in leakage, on average, by removing excess pressure ● a significant fall in energy consumption, of around 20%, thanks to less water being pumped at a lower average pressure ● around a 40% drop in burst frequency smoother water transitions and reduced maximum pressure ● fewer complaints to the network thanks to greater confidence in target pressures ● an extension of more than five years in the lifespan of infrastructure ● a saving of 40% on operational costs due to fewer ‘find and fix’ cases and a reduction in scheduled site visits. As we continue to lead the way in pressure management, we are continuously researching for new ways in which utilities can use our systems to add value to customers and continue to make savings and efficiencies in operations and performance. Beyond our solutions and technology - we pride ourselves upon our dedication to the industry - both in terms of our extensive charity fundraising for WaterAid and the commitment we have made to developing our employees into a strong network of industry professionals.

View Full Page
Website
www.i2owater.com
Employee range
51 – 100
Web Traffic (Monthly)
—
Funding amount
$19.5M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
2nd
AccelerComm logo
AccelerCommSB Score: 367

AccelerComm is an exciting semiconductor IP-core company that provides solutions to accelerate the next generations of wireless communications (3GPP rel 14, rel 15 and beyond). Their technology solves the bottleneck that would otherwise limit the speed of next generation wireless communication, namely the error correction decoding that is required to overcome the effects of noise, interference and poor signal strength.

View Full Page
Website
www.accelercomm.com
Employee range
51 – 100
Web Traffic (Monthly)
—
Funding amount
$52.4M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
3rd
Curve Therapeutics logo
Curve TherapeuticsSB Score: 336

Curve has developed an innovative screening platform that is transforming the discovery of first-in-class therapeutics. The platform allows functional screening of diverse, genetically encoded Microcycle™ libraries against a broad range of disease-associated targets that are present in their native conformation inside a mammalian cell. Curve is deploying this platform to build a pipeline of novel cancer drugs.

View Full Page
Website
www.curvetx.com
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
$51.4M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
4th
Bowman Power Group logo
Bowman Power GroupSB Score: 331

Bowman Power Group’s Electric Turbo Compounding (ETC) technology recovers waste energy from the exhaust of reciprocating gensets and converts it to grid quality electricity. Over 600 ETC systems deployed worldwide have generated in excess of 350GWh of free energy and saved over 100,000 tonnes of CO2. Cummins, Wärtsilä, Mitsubishi, Sewatama, Pacific Energy and Liebherr have all used Bowman’s award-winning ETC technology to improve genset efficiency; reducing fuel consumption or generating additional power. Bowman is supported by a number of leading investment companies, including Octopus Investments, Ombu Group, Fjord and BOOST&Co. The company is based in Southampton and employs 80 staff.

View Full Page
Website
www.bowmanpower.com
Employee range
51 – 100
Web Traffic (Monthly)
—
Funding amount
$25M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
5th
SPI Lasers logo
SPI LasersSB Score: 330

SPI Lasers' world-leading fiber laser technology has the energy to transform your manufacturing process. Welding, cutting, marking and micromachining operations can be carried out faster and more accurately with an SPI laser, for better reliability, less waste and improved productivity.

View Full Page
Website
www.spilasers.com
Employee range
251 – 500
Web Traffic (Monthly)
—
Funding amount
$3.4M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
6th
AudioScenic logo
AudioScenicSB Score: 324

AudioScenic is changing the way we experience audio. Using small arrays of speakers and advanced head tracking technologies, immersive 3D Sound will no longer require headphones or speakers located all around a room. We will deliver an unrivalled, authentic and natural audio experience for consumers of immersive Gaming, VR and Movie audio. The AudioScenic system allows a user to experience sounds in a way which is far superior to a conventional loudspeaker system. In a traditional loudspeaker set-up, sound radiates out from the speaker before bouncing off the walls and other objects in the room prior to reaching the ear. What you hear is a mix of the original and reflected sound creating, at best, a distorted "3D" effect. In contrast, AudioScenic delivers controlled and independent sound beams direct to the left and right ears. In this way we can create "virtual headphones" and deliver spatial audio which simulates sounds positioned in 3D space all around the listener. In addition, our proprietary head tracking technology enables the independent beams of sound to follow the ears of a listener, delivering perfect 3D Sound no matter what position they occupy or whether they move either whilst playing a computer game or watching a movie. Thanks to AudioScenic's technology the "sweet-spot" concept belongs to the past. AudioScenic offers solutions for a range of different platforms and a variety of market applications. Our designs use expandable loudspeakers arrays with varying numbers of drivers to create precisely controlled sound beams. AudioScenic works hand-in-hand with our partners and customers to provide the detailed acoustic design support required to implement different products including Home Cinema, Gaming, Simulation, VR and public space audio systems. The AudioScenic Virtua 3D Engine has been ported to leading signal processing platforms. The Virtua Engine uses our patented ultra-efficient signal processing architecture to allow implementation across a range of cost effective systems. AudioScenic provides optimized implementations of our Virtua Engine and our image processing technology to partners and customers.

View Full Page
Website
audioscenic.com
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
$2.6M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
7th
RailSense Solutions logo
RailSense SolutionsSB Score: 311

RailSense supply leading technologies to operators, asset maintenance and infrastructure owners, providing dynamic solutions for the condition monitoring and predictive maintenance needs of track and railway infrastructure.

View Full Page
Website
www.RailSense.co.uk
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
$1.6M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
8th
Inflowmatix logo
InflowmatixSB Score: 310
Energy & EnvironmentEnergy & Environment-Other

Inflowmatix is a spin-out company from the InfraSense Labs at the Department of Civil and Environmental Engineering of Imperial College London. Inflowmatix builds upon the unique cross-disciplinary expertise from sensing to advanced modelling and optimization and the active research collaborations with water utilities and IT system integrators. Inflowmatix creates innovative and customer tailored solutions for the steady-state, resilient and energy efficient operation of water supply networks by continuously monitoring and analyzing the fluid dynamics in complex networks. This allows operators to continuously gain unique insight and proactively optimize the dynamic network performance in order to extend the service life of infrastructure assets. Our expertise in modelling the steady and unsteady-state hydraulics of water distribution networks, combined with knowledge and experience in the design and implementation of embedded electronic systems, yield compelling returns on investment for our customers. Many cities in the world face the problem of ageing infrastructure, increasing population demand and climate change. This combined with increasing regulatory and financial pressure means water utilities are actively seeking novel, integrated and optimized operational strategies for managing leakage, demand and energy efficiency in order to deliver high-quality of service to customers within cost constraints. Water companies and operators are facing unparalleled challenges to meet increasing demand with limited water and financial resources. By successfully applying the technologies and analytics developed by Inflowmatix to water supply networks, we significantly improve the management of leakage, demand, energy and operational incidents, thus providing multiple operational benefits for network operators.

View Full Page
Website
inflowmatix.com
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
$8M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
9th
Symetrica logo
SymetricaSB Score: 309

Symetrica Ltd. engages in the development and commercialization of radiation detection and identification systems for security, medical diagnostics, geophysical, and space research and development applications. The company was incorporated in 2002 and is based in Southampton, the United Kingdom.

View Full Page
Website
www.symetrica.com
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
$25.7M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
10th
Dynamon logo
DynamonSB Score: 301

Dynamon uses data analytics to help logistics companies make better purchasing decisions. Dynamon analyse existing fleet telematics data to identify solutions that will significantly reduce the total cost of running a fleet. Dynamon analytics are validated by real-world testing and many blue-chip fleets are acting on recommendations provided by Dynamon. Dynamon recommendations provide reliable ROI and lead to significant long-term cost savings for logistics companies.

View Full Page
Website
dynamon.co.uk
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
—
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
11th
Aquark Technologies logo
Aquark TechnologiesSB Score: 291

They develop Android apps, iOS apps, websites, e-commerce portals with four major factors in mind. Speed, Security, Simple to use and beautifully designed. Got an experienced team with more than 15+ years of experience combined in mobile, web and designs.

View Full Page
Website
www.aquarktechnologies.com
Employee range
1 – 10
Web Traffic (Monthly)
—
Funding amount
—
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—

Total amount:40

Most Funded Startups in Southampton for 2026

The top three most funded startups in Southampton have raised total funding of more than USD 129M. AccelerComm has 0.02% more funding than Curve Therapeutics.
1st
AccelerComm logo
AccelerCommSB Score: 367

AccelerComm is an exciting semiconductor IP-core company that provides solutions to accelerate the next generations of wireless communications (3GPP rel 14, rel 15 and beyond). Their technology solves the bottleneck that would otherwise limit the speed of next generation wireless communication, namely the error correction decoding that is required to overcome the effects of noise, interference and poor signal strength.

View Full Page
Website
www.accelercomm.com
Employee range
51 – 100
Web Traffic (Monthly)
—
Funding amount
$52.4M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
2nd
Curve Therapeutics logo
Curve TherapeuticsSB Score: 336

Curve has developed an innovative screening platform that is transforming the discovery of first-in-class therapeutics. The platform allows functional screening of diverse, genetically encoded Microcycle™ libraries against a broad range of disease-associated targets that are present in their native conformation inside a mammalian cell. Curve is deploying this platform to build a pipeline of novel cancer drugs.

View Full Page
Website
www.curvetx.com
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
$51.4M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
3rd
Symetrica logo
SymetricaSB Score: 309

Symetrica Ltd. engages in the development and commercialization of radiation detection and identification systems for security, medical diagnostics, geophysical, and space research and development applications. The company was incorporated in 2002 and is based in Southampton, the United Kingdom.

View Full Page
Website
www.symetrica.com
Employee range
11 – 50
Web Traffic (Monthly)
—
Funding amount
$25.7M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—

Total amount:40

Top Hiring Startups in Southampton by Employee Number

The top three hiring startups in Southampton have an median employee size that is between [251-500]
1st
Cunard logo
CunardSB Score: 190

Cunard has carried guests across the great oceans and to the far points of the globe in unparalleled style aboard the world famous Queen Mary 2, Queen Victoria and Queen Elizabeth. The most glamorous names of yesterday and today have made champagne toasts in her salons, waltzed the night away in Cunard's grand ballrooms, savoured grand feasts of the finest flavours in her dining rooms, and whiled away hours immersed in fascinating conversation on decks. They invite you to take your place in the rich heritage of ocean travel, and write your own classic adventure tale with their luxury cruises. Join us for a journey on the legendary luxury ocean liners of Cunard.

View Full Page
Website
www.cunard.co.uk
Employee range
1,001 – 5,000
Web Traffic (Monthly)
—
Funding amount
—
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
2nd
SPI Lasers logo
SPI LasersSB Score: 330

SPI Lasers' world-leading fiber laser technology has the energy to transform your manufacturing process. Welding, cutting, marking and micromachining operations can be carried out faster and more accurately with an SPI laser, for better reliability, less waste and improved productivity.

View Full Page
Website
www.spilasers.com
Employee range
251 – 500
Web Traffic (Monthly)
—
Funding amount
$3.4M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
3rd
Anderselite logo
AnderseliteSB Score: 101

Part of Morson Edge since Nov 2025. Established in 1984, Anderselite are leading technical recruitment experts to the built environment. With six regional offices across the UK our dedicated teams are perfectly positioned to provide permanent, temporary and contract blue and white collar recruitment services to a multitude of companies, large and small, within the Construction and Rail sectors.

View Full Page
Website
www.anderselite.com
Employee range
251 – 500
Web Traffic (Monthly)
—
Funding amount
—
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—
4th
i2O logo
i2OSB Score: 379

Since 2005, i2O has been committed to taking the weight off of water network management. With an experienced and knowledgeable team at the forefront of the business, i2O has been focused on developing intuitive pressure management solutions. The company has UK Headquarters in Southampton and offices in Malaysia, Spain and Colombia, with systems currently installed in 22 countries - being used by utilities all over the world to optimise network pressure. Our comprehensive hardware, software and integrated solutions are designed to support utilities in taking pressure management to the next level. These solutions are already saving more than 235 million litres (statistics needs updating) of water every single day, while supporting utilities in achieving the following: ● a reduction of 20% in leakage, on average, by removing excess pressure ● a significant fall in energy consumption, of around 20%, thanks to less water being pumped at a lower average pressure ● around a 40% drop in burst frequency smoother water transitions and reduced maximum pressure ● fewer complaints to the network thanks to greater confidence in target pressures ● an extension of more than five years in the lifespan of infrastructure ● a saving of 40% on operational costs due to fewer ‘find and fix’ cases and a reduction in scheduled site visits. As we continue to lead the way in pressure management, we are continuously researching for new ways in which utilities can use our systems to add value to customers and continue to make savings and efficiencies in operations and performance. Beyond our solutions and technology - we pride ourselves upon our dedication to the industry - both in terms of our extensive charity fundraising for WaterAid and the commitment we have made to developing our employees into a strong network of industry professionals.

View Full Page
Website
www.i2owater.com
Employee range
51 – 100
Web Traffic (Monthly)
—
Funding amount
$19.5M
National Rank(United Kingdom)
—
Regional Rank(Western Europe)
—
Global Rank(Worldwide)
—

Total amount:71

Explore More Top Startups

Explore the Startup Ecosystem of Southampton

National Rank

(United Kingdom)

20th

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Regional Rank

(Western Europe)

85th

1

Global Rank

(WorldWide)

312th

29

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