Directory

Society of Light and Lighting (SLL)

CommunityOtherBritish

The Society of Light and Lighting (SLL) is a professional membership organisation dedicated to advancing knowledge, research, and best practice in lighting design, technology, and application across built environments and public spaces.

Solus Power

StartupDefenceClimateBritish

Military-grade portable Li-ion battery tech ('Kratos', a 'Jerry Can of Electricity') for off-grid power to drones and comms; NATO/UK-standard compliant, dual-use.

South London Makerspace

CommunityOtherCoworkingBritish

South London Makerspace is a member-run, non-profit community workshop in Herne Hill, London, incorporated in September 2013 and opened to members in March 2014. Owned and maintained entirely by its members on a volunteer basis with no paid staff, it offers access to woodworking, electronics, metalwork, laser cutting, CNC, screen printing, 3D printing, ceramics, and bike maintenance facilities across railway arch workshops.

Soveren

ScaleupCybersecurityBritish

Data observability and security platform that discovers, monitors and protects sensitive data across applications.

Space DOTS

StartupSpaceBritish

Modular pico-payload 'Barnacle DOT' devices for active in-orbit testing and qualification of advanced materials, making on-orbit materials testing faster and cheaper.

Space Forge

StartupSpaceAIBritish

Cardiff-based in-space manufacturing startup producing semiconductor substrates and advanced materials in microgravity via its reusable ForgeStar orbital platform.

Spaceflux

ScaleupSpaceAIBritish

Space domain/situational awareness: operates a global network of ~15 electro-optical (visible + SWIR) telescopes with AI analytics to track satellites and debris 24/7.

Spacehive

StartupOtherBritish

Civic crowdfunding platform connecting community projects with funding from councils, foundations and companies; place-based participatory funding.

Spend Network

StartupOtherBritish

Global procurement open-data company collecting and publishing every public tender/contract worldwide; powers B2G market analysis and policy transparency.

Spill

StartupBiotech & Life SciencesBritish

Workplace mental-health support delivered via Slack, Teams and a web app: video, phone and message therapy with qualified therapists, plus mental health training for managers and self-guided wellbeing content.

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

ScaleupClimateOtherBritish

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.

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.

StartUp Lab Ravensbourne

Incubator / AcceleratorMediaOtherAcademiaCoworkingBritish

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.

SteelRock Technologies

StartupDefenceBritish

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.

Storey

CoworkingOtherBritish

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.

Stratiphy

StartupFinanceAIBritish

FCA-regulated AI-powered retail investing platform allowing individuals to build, backtest and automate personalised investment strategies without coding. In April 2026 became the first UK platform to offer crypto ETNs within a tax-free ISA wrapper.

Stride.VC

VCSaaSConsumerBritish

Stride.VC is a London-based seed-stage venture capital fund that backs early-stage technology companies primarily in the United Kingdom and France. Founded in 2018, the firm is sector-agnostic and focuses on partnering with entrepreneurs from the earliest stages of company building; it raised two funds totalling approximately £220 million but announced in 2023 that it would not raise a third fund.

Sunsave

ScaleupClimateBritish

Zero-upfront solar-and-battery subscription (Sunsave Plus) making residential rooftop solar accessible across England and Wales.

Sunswap

ScaleupClimateLogisticsBritish

Manufactures Endurance, a solar- and battery-powered zero-emission transport refrigeration unit for cold-chain logistics.

Super Payments

StartupFinanceBritish

Online checkout payment service letting shoppers pay via bank account, with merchants paying commission only on incremental sales.

SuperFi

StartupFinanceBritish

Debt-prevention platform helping people manage bills, arrears and access support; partners with GLA on cost-of-living interventions.