Directory

Remakery Brixton

CommunityOtherCoworkingBritish

The Remakery is a co-operative community workshop in South London, established in 2012, dedicated to upcycling and reusing waste materials. It offers around 900 square metres of shared space including woodworking, textiles, metalwork, coworking desks, and a surplus-food café, serving local residents, makers, and social enterprises focused on sustainability and the circular economy. The Remakery also runs the Future Makers programme to support eco-entrepreneurs.

Resurrect Bio

StartupBiotech & Life SciencesAIBritish

Agricultural biotech company using AI-driven gene editing (FloraFold AI platform) to reactivate dormant disease-resistance genes in crops such as soybean, wheat, potato and maize; spun out of The Sainsbury Laboratory.

RevEng.AI

StartupCybersecurityAIBritish

AI-powered binary analysis platform (BinNet model) that inspects compiled software, firmware and third-party binaries without source code to detect vulnerabilities and backdoors, addressing software supply-chain security.

Revolt Ventures

VCProptechBritish

Revolt Ventures is a London-based venture capital firm focused on early-stage real estate and proptech technology companies, founded in 2018 and backed by MARK (formerly Meyer Bergman), a private equity real estate investment manager. The firm targets high-growth technology startups operating at the intersection of real estate, retail, and digital innovation.

Rezonant

StartupAI SafetyAIBritish

Open-source SDK and cloud platform for building and deploying controllable, auditable enterprise AI agents with human-in-the-loop oversight. Founded in 2024 and formerly known as Portia AI, the company recently launched Rezonant, a product workspace that turns requirements into structured, agent-ready engineering tasks.

Rightcharge

StartupClimateFinanceBritish

EV charging payments and analytics platform for business fleets, automating home-charging reimbursements and providing a tax-compliant audit trail; raised £1.6M seed in October 2025 and partnering with Octopus Electroverse for European expansion.

Rise Accounting

Professional ServicesOtherBritish

Rise Accounting is a London-based accounting and advisory firm founded in 2021, serving ambitious founders, SMEs, and fast-growing businesses. The firm provides bookkeeping, management accounts, payroll, VAT, SEIS/EIS assurance, employee share schemes, and cross-border expansion support into the UAE and US. It operates with chartered accountants in the UK and Dubai, and CPAs in the US.

Risk Ledger

ScaleupCybersecurityBritish

Continuous third-party and supply-chain risk management platform using a social-network model where suppliers maintain one shared security profile visible to all their clients, reducing duplication and improving real-time visibility.

River Capital

PEOtherAIVCBritish

River Capital (formerly Alliance Fund Managers) is an FCA-regulated fund management company based in Liverpool, part of the MSIF group. It provides tailored debt, mezzanine, private equity, and venture finance solutions to small and medium-sized enterprises across the North West of England, and manages funds totalling over £100 million including a dedicated AI fund.

Roark Aerospace

StartupDefenceAIBritish

Defence technology company developing autonomous counter-drone systems and global drone-detection networks; its Aero-Ark platform offers drone-detection-as-a-service using forward-scatter detection, AI and packet sniffing.

Roehampton Startup Accelerator

Incubator / AcceleratorOtherAcademiaBritish

The Roehampton Startup Accelerator is a free programme run by the University of Roehampton for graduates seeking to develop business ideas or early-stage ventures. It offers structured workshops covering lean startup methodology, sales, legal matters and fundraising, alongside mentoring from entrepreneurs and investors, demo days, and hot-desking facilities on campus. The programme runs in cohorts, typically from September to December each year.

Round

StartupFinanceAIBritish

AI-driven finance automation platform for modern finance teams, with an Agentic Workflow Builder and Autonomous Payroll powered by AI agents.

Roundhouse Works

CoworkingOtherBritish

Roundhouse Works is a coworking space and career development programme for creative freelancers and early-stage entrepreneurs aged 18 to 30, operated by the Roundhouse Trust charity in Camden. Opened in 2023 as part of a £7 million facility adjacent to the iconic Roundhouse music venue, it offers hot-desks, recording studios, a podcast studio, a triple-height performance studio, seminar rooms, and free workshops through its Self Made Series. The programme is designed to support up to 15,000 young creatives each year.

Royal Holloway Enterprise Hub

Incubator / AcceleratorOtherAcademiaBritish

The Royal Holloway Enterprise Hub is the enterprise and entrepreneurship centre of Royal Holloway, University of London, providing workspace, workshops, mentoring, and business development support to students, staff, and nascent local entrepreneurs in the Egham area. Housed in the Emily Wilding Davison Building, it is part of Royal Holloway Innovation and acts as a gateway to the expertise of the university and its partner organisations. The Hub opened in January 2022.

Ruka Hair

StartupConsumerBiotech & Life SciencesBritish

London-based hair extensions and haircare brand creating science-led, textured-hair solutions for Black women, including synthetic and human hair extensions.

Rust London User Group

CommunityOtherBritish

Rust London User Group is a community-led meetup and networking organisation for developers and enthusiasts interested in the Rust programming language.

S100 Club

Ecosystem Bodies, Catapults & InstitutionsOtherBritish

The S100 Club (formerly Surrey 100 Club) is a not-for-profit angel investment network founded in 2007 and based at the Surrey Research Park, University of Surrey in Guildford. The club hosts pitch events several times per year, connecting early-stage companies seeking £250k–£1m in funding with a membership of angel investors, and charges no fees or commission to either investors or entrepreneurs.

SECQAI

StartupDefenceAIBritish

Ultra-secure hardware and software company developing military-grade semiconductors and quantum algorithms for defence and intelligence applications. Launched what it claims to be the world's first hybrid Quantum LLM (QLLM) in 2025, targeting sectors requiring the highest levels of data protection.

SIS Ventures

VCOtherAIGrantmakerBritish

SIS Ventures is an Edinburgh-based impact investment arm of Social Investment Scotland, established in 2018 and authorised by the Financial Conduct Authority. The firm has invested in early-stage Scottish companies with high-growth potential that also deliver measurable social or environmental impact, and is Scotland's first signatory to the Operating Principles for Impact Management; it is not currently making new investments and is focused on managing its existing portfolio.

SKY ENGINE AI

ScaleupAIBritish

Generative-AI synthetic-data cloud that procedurally generates photorealistic annotated data and trains vision-AI models for robotics, automotive, manufacturing.

SLAMcore

ScaleupAISaaSBritish

Spatial intelligence (visual SLAM) software giving robots, AGVs and drones real-time understanding of location and surroundings without extra infrastructure; products include Slamcore Aware and Slamcore Alert.

SWAIN

Ecosystem Bodies, Catapults & InstitutionsOtherBritish

South West Angel and Investor Network (SWAIN) is an independent, not-for-profit angel network founded in 2004 and based in Bristol that connects private investors with early-stage companies seeking equity finance across the South West of England. It operates throughout the region covering Wiltshire, Gloucestershire, Somerset, Devon, Dorset, and Cornwall, and focuses on deal sizes from £25,000 to £750,000.

SWIG

GrantmakerOtherGovernmentBritish

South West Investment Group (SWIG) is a not-for-profit organisation established in 1989 and based in Truro, Cornwall, that provides loan finance and equity-linked investments to small and medium-sized businesses across the South and West Country. Since April 2009 the group has lent over £116 million across more than 5,700 businesses, helping to create and safeguard approximately 10,000 jobs and generate over £448 million in regional economic impact.

Saatchinvest

VCSaaSAIBritish

SAATCHiNVEST is a London-based early-stage venture capital fund operating within M&C Saatchi PLC. Founded in 2012, the fund backs technology companies at seed stage, typically investing up to £300k per deal. Portfolio companies include Citymapper, Farewill, Dojo, and Ometria.