Directory

Sprints

VCConsumerFinanceBritish

Sprints Partners is a London-based growth equity firm founded in 2015 that deploys capital into technology-enabled consumer and digital businesses across Western Europe and North America. The firm focuses on category-winning companies in e-commerce, marketplaces, and consumer technology, and its portfolio includes companies such as Revolut, Vinted, Checkout.com, and Back Market. The firm invests equity tickets typically starting at Series B, ranging from €10 million to €70 million.

Sprive

StartupFinanceConsumerBritish

Mortgage-overpayment app helping UK homeowners pay off mortgages faster via automation, round-ups and cashback rewards.

Spruce

StartupClimateSaaSBritish

London-based startup building an all-in-one software platform for heat pump installers, covering the full workflow from customer enquiry and heat loss calculations through to MCS-compliant compliance documentation.

Square Mile Farms

ScaleupClimateBritish

Designs and installs hydroponic vertical farms in offices and workplaces across the UK, with over 120 farms deployed for clients including Bloomberg; combines produce growing with corporate wellbeing and sustainability programmes.

Squarepoint Capital

CorporateFinanceForeign

Squarepoint-Capital.com - quantitative investment manager

Stability AI

ScaleupAIBritish

Generative AI research company best known for Stable Diffusion open-weights text-to-image models, plus models for image, video, audio and 3D generation. Operates a B2B model combining open-source distribution with commercial API services and enterprise licensing.

StackAdapt

ScaleupMediaAIForeign

StackAdapt is the AI advertising platform that helps marketers orchestrate audiences, creative, channels, and measurement from one platform with AI built into every stage of advertising.

Stacks

StartupFinanceAIBritish

Let agents reconcile, analyze, and explain your financial data. You focus on driving outcomes. Book a free assessment.

Staffbase

ScaleupSaaSForeign

Staffbase is the AI-native Employee Experience Platform built for the hardest-to-reach employees. Connect every employee with centralized, trusted communication. Book a demo.

Stanhope AI

StartupDefenceAIBritish

UCL/KCL spin-out applying the Free Energy Principle and Active Inference to autonomous systems, enabling drones and robots to make real-time decisions in unpredictable environments without large training datasets. Partners include the Royal Navy and Germany's Federal Agency for Disruptive Innovation.

Starburst

ScaleupSaaSForeign

Query across sources with data federation, Trino, and Apache Iceberg, while limiting the need to copy data.

Starling Bank

CorporateFinanceConsumerBritish

Licensed UK digital-only bank offering personal, business and SME accounts alongside its Engine banking-as-a-service SaaS platform. Profitable since 2021 and targeting a stock market listing at a circa £4 billion valuation.

StartUp Lab Ravensbourne

Incubator / AcceleratorMediaAcademiaCoworkingBritish

StartUp Lab is Ravensbourne University London's entrepreneurial hub for students and alumni seeking to develop and launch creative and digital technology ventures. Based at the university's Greenwich Peninsula campus, it offers mentoring, business planning support, workshops from industry experts, and networking with investors, with the 6-month intensive Founder Programme as its flagship offering. The broader Incubation+ programme provides hot-desking, office space, MR/VR lab access, and accelerator support to graduates and external businesses.

Startup Coalition

Ecosystem Bodies, Catapults & InstitutionsOtherBritish

Startup Coalition (formerly Coadec, the Coalition for a Digital Economy) is an independent advocacy organisation that shapes UK policy on behalf of tech startups and scaleups. Founded in 2010, it campaigns across three core pillars — access to talent, access to finance, and regulation — and has a network of over 3,500 startups and investors.

SteelRock Technologies

StartupDefenceDeep TechBritish

Developer of NightFighter portable RF counter-UAS systems and multirole drone platforms for military, public safety and civil protection use. NightFighter is deployed with Tier 1 security forces across multiple jurisdictions.

Stemettes

CommunityEdtechBritish

Stemettes is an award-winning UK-based social enterprise and registered charity (operating as Stemette Futures) that engages young women and non-binary people aged 5 to 25 in Science, Technology, Engineering, Arts and Maths (STEAM). Since its founding in 2013 it has reached over 73,000 young people through mentoring, hackathons, academies, and industry events.

StepStone Group

PEOtherForeign

Global private markets firm managing $233B AUM across private equity, infrastructure, private debt, and real estate; listed on Nasdaq (STEP).

StirlingX

StartupDefenceDeep TechBritish

Secure drone intelligence delivering actionable insight across critical infrastructure and commercial assets.

Stoa

StartupFinanceBritish

Save with Stoa and unlock premium perks upfront. Build better saving habits, protect your deposit, and enjoy real rewards with your Saving Score.

Stone Ventures

PEFinanceBritish

Stone Ventures (trading as Stone Venture Partners Ltd) is a Worcester-based private equity and SME investment firm founded in 2010 that backs established, profitable UK small and medium-sized businesses through growth capital, management buy-outs, and retirement sales. The firm typically invests up to £1 million in the equity gap between bank lending and mainstream private equity.

Storey

CoworkingReal EstateBritish

Storey is a flexible workspace brand launched by British Land in June 2017, providing fully furnished offices, meeting rooms, and event spaces within British Land's London campuses including Liverpool Street/Broadgate, Paddington, Regent's Place, and Hackney. Targeting ambitious growing companies, Storey offers all-inclusive packages covering rent, business rates, WiFi, and cleaning on flexible terms across approximately 338,000 sq ft of space.

Stotles

ScaleupAISaaSBritish

AI B2G sales-intelligence SaaS platform that consolidates tender, spend and contract data so private-sector suppliers can find, track and win public-sector contracts. Raised a $13M Series A in May 2025 and expanding into the US market.

StratX

Professional ServicesClimateBritish

StratX helps developers and investors turn SAF projects into bankable, FID-ready opportunities through offtake, pricing, and commercial strategy.

Strategy

CorporateCrypto & Web3AIForeign

Strategy Solutions powered by Mosaic provide a universal semantic layer that unifies enterprise data, governs business metrics, and delivers trusted AI and analytics across every team, tool, and workflow.