Directory

Plug and Play

Incubator / AcceleratorOtherFinanceVCForeign

Plug and Play Tech Center is a global innovation platform and startup accelerator founded in 2006 and headquartered in Sunnyvale, California. The organisation runs vertical-specific accelerator programmes across fintech, insurtech, health, retail, mobility, and many other sectors, connecting startups with corporate partners and investors across more than 60 locations worldwide. It has been ranked the most active startup accelerator in the world and has backed companies including Onfido, Honey, and Albert.

Plum

ScaleupFinanceConsumerBritish

Smart money app automating savings, investing (stocks and funds) and personal finance management for consumers across the UK and Europe.

Plural

VCAIDefenceBritish

Plural is a European early-stage venture capital firm founded in 2022 by experienced technology founders including co-founders of Wise and Skype. The firm backs ambitious European startups from seed through Series B, with a focus on artificial intelligence, deep and frontier tech, climate and energy, and defence technology, aiming to have GDP-level impact on Europe.

Poindexter Labs

StartupAIBritish

London-based AI data company producing expert-level training data for frontier AI models via collaborative, peer-reviewed workflows across maths, science, law and medicine.

Point72

PEFinanceForeign

Point72 is a leading global alternative investment firm founded in 2014 that deploys fundamental equities, systematic, macro, private credit, and venture capital strategies across more than 200 investing teams. The firm manages approximately $50 billion in assets and employs over 3,300 people globally, with offices across North America, Europe, Asia, and Australia including a UK office in St James's, London.

Polaron

StartupClimateAIBritish

AI intelligence layer for materials science linking processing, microstructure and performance to accelerate design and manufacture of batteries, alloys and ceramics.

Pollen Street

PEFinanceSaaSBritish

Pollen Street Group is a London-listed private capital asset manager focused on financial and business services, with over £8 billion in AUM across private equity and private credit strategies. Founded in 2013 as a spin-out from Royal Bank of Scotland, the firm invests in and builds businesses across the financial services ecosystem, with offices in London, Austin, and Abu Dhabi.

Pollinate

ScaleupFinanceBritish

White-label, cloud-based platform helping banks deliver merchant acquiring and SMB banking services globally.

PolyAI

ScaleupAIBritish

Enterprise voice-AI platform deploying conversational agents that handle complex customer-service interactions at scale, used across hospitality, retail, financial services and the public sector.

Polymateria

ScaleupClimateBritish

Biotransformation technology that fully biodegrades common plastics leaving zero microplastics, licensed to manufacturers as drop-in masterbatch additives under the Cycle+ and DegrAid brands.

Ponda

StartupClimateBritish

Ponda (formerly Saltyco) is a biomaterials company developing novel textiles from truly regenerative fibres. We connect the regeneration of some of our most precious ecosystems to the production of responsible materials for the textiles industry.

Poolside

StartupAIDeep TechForeign

Poolside is a foundation model company bringing intelligence to everywhere work gets done. Our mission is to drive abundance for humanity by creating artificial general intelligence.

Port

ScaleupSaaSAIForeign

The Agentic SDLC platform for building your own AI software factory that includes context, agent management and governance.

Portage

VCFinanceForeign

Portage is a global fintech and financial services investment platform within the Sagard group, originally known as Portag3 Ventures, that backs companies from seed to Series C with capital, a global investor network, and value creation expertise. The firm manages $6.4 billion in assets across 130+ portfolio companies in 15 countries, with offices in Toronto, Montreal, New York, Paris, and London.

Portfolio Ventures

VCFinanceSaaSBritish

Portfolio Ventures is a London-based angel fund and early-stage investor, founded in 2014 and billing itself as the UK's best-connected early-stage investor. The PV Angel Fund deploys cheques of £200k to £500k into UK-based fintech, insurtech, B2B SaaS, and enterprise software companies at pre-seed through Series A stage. The firm is authorised and regulated by the FCA and has backed over 200 companies, building a network of more than 1,000 investors.

Post-Quantum

ScaleupCybersecurityQuantumBritish

Quantum-safe cybersecurity firm offering PQC-based VPN, secure messaging, PKI/identity and crypto-migration services; Nomidio division provides biometric identity verification. Post-Quantum has secured NATO communications infrastructure and was recognised as a top PQC innovator in 2025.

Praetura Ventures

VCSaaSAIBritish

Praetura Ventures was a Manchester-based venture capital firm founded in 2019, focused on early-stage, high-growth businesses in the North of England and wider UK, investing via EIS and other funds with cheques of £200k to £8m. In June 2025, Praetura Ventures merged with Edinburgh-based Par Equity to form PXN Group (trading as PXN Ventures), a £670m AUM investment platform with offices in Manchester, Leeds, Edinburgh, and London, championing founders across the North of England, Scotland, and Northern Ireland.

Preoptima

StartupClimateAIBritish

Generative AI design tool giving early-stage building designs accurate whole-life embodied carbon assessments and bills of quantity. Preoptima enables architects and engineers to optimise for sustainability from the earliest stages of the design process.

Preply

ScaleupEdtechForeign

Looking for a tutor? Preply is the best platform for private online lessons with a flexible payment system and affordable prices. Book your first lesson.

Presidio Ventures

VCAICybersecurityCorporateForeign

Presidio Ventures is the corporate venture capital arm of Sumitomo Corporation, founded in 1998 and based in Silicon Valley, investing in technology companies across enterprise IT, cybersecurity, artificial intelligence, digital media, mobility, IoT, fintech, and robotics. The firm has invested in more than 200 companies and helps US startups access Sumitomo's global network and the Japanese market. In 2022, Presidio Ventures Europe was launched with a UK base in London to focus on deep tech, energy, mobility, agri-food, and healthcare.

Prevalent AI

ScaleupCybersecurityAIForeign

Prevalent AI is a London-based cybersecurity company that builds a sovereign, continuously updated knowledge graph turning fragmented enterprise data into contextual insight for security teams and AI agents. Founded by GCHQ and Darktrace alumni, it has operated profitably for nearly a decade serving large global enterprises.

Pride in STEM

CommunityOtherBritish

Pride in STEM is a UK-registered charitable trust run by an independent group of LGBTQIA+ scientists and engineers that aims to showcase and support LGBTQIA+ people in science, technology, engineering, and mathematics. Founded in April 2016, the charity runs community events, public talks, a podcast, a small grants scheme, and co-ordinates the International Day of LGBTQIA+ People in STEM (18 November). It also undertakes advocacy and policy work with scientific institutions and government.

Primer

ScaleupFinanceAIBritish

Unified payments infrastructure and orchestration platform for payment acceptance, routing, reconciliation and A/B testing across PSPs. Primer lets merchants compose and automate their entire payment stack through a single API, with AI-driven intelligence layered across transactions.

Procure Ai

StartupAISaaSBritish

AI-native procurement automation platform using autonomous agents for sourcing, contracting, purchasing and invoice management. Procure Ai helps enterprise procurement teams reduce costs and cycle times by automating repetitive negotiation and supplier management tasks.