Directory

HV Capital

VCSaaSAIForeign

HV Capital (formerly Holtzbrinck Ventures) is a Munich and Berlin-based venture capital firm founded in 2000 that backs European digital technology companies from seed stage through to growth. With over €2.8 billion in assets under management across nine fund generations, it is one of Europe's most active multi-stage investors, writing cheques from €0.5 million in seed rounds up to €100 million in follow-on investments. Its portfolio includes Zalando, Delivery Hero, FlixBus, and Isar Aerospace.

HVM Catapult

Ecosystem Bodies, Catapults & InstitutionsDeep TechBritish

The High Value Manufacturing Catapult (HVM Catapult) is a strategic research and innovation hub that commercialises the UK's most advanced manufacturing ideas, operating a nationwide network of seven research and development centres. Established in 2011 by Innovate UK, it employs over 3,700 engineers, scientists, and technicians who support businesses across automotive, aerospace, defence, clean energy, and advanced materials sectors. It has supported over 30,000 manufacturing businesses since inception.

Haatch

VCSaaSFinanceIncubator / AcceleratorCoworkingBritish

Haatch is a UK-based venture capital firm founded in 2013 that invests in pre-seed and seed-stage B2B SaaS companies using SEIS and EIS fund structures. The firm focuses on future-of-enterprise software, fintech, and vertical SaaS, targeting ambitious founders solving deep pains with a goal of helping portfolio companies reach £1 million ARR. Haatch also operates a coworking hub from its Stamford base and has backed over 120 companies with a combined portfolio value exceeding £900 million.

Habitual

StartupBiotech & Life SciencesDeep TechBritish

Digital therapeutics for type 2 diabetes remission and weight loss, combining meal-replacement programmes, GLP-1 medication and digital behaviour-change coaching.

Hacker News London

CommunityOtherBritish

Hacker News London is a community group for technologists and entrepreneurs interested in the Hacker News platform and tech culture, hosting meetups and fostering discussion around technology, startups, and innovation.

HackerOne

ScaleupCybersecurityAIForeign

HackerOne combines AI with the ingenuity of the largest community of security researchers to find and fix security, privacy, and AI vulnerabilities across the SDLC. HackerOne offers AI red teaming, crowdsourced security, bug bounty, vulnerability disclosure and pentesting.

Hadean

ScaleupDefenceSaaSBritish

Distributed spatial-computing platform (Aether Engine) for massively scalable simulations, digital twins, synthetic environments and cloud-distributed wargaming for defence.

Hakluyt Capital

VCOtherBritish

Hakluyt Capital is the investment arm of Hakluyt. We invest in the world’s most promising high-growth companies, alongside the best venture capital funds.

Hale House

CoworkingBiotech & Life SciencesDeep TechBritish

Hale House is a HealthTech innovation hub in London's Harley Street Health District, developed by The Howard de Walden Estate and operated by Spacemade across three adjoining buildings. The facility offers flexible coworking, private offices, dry labs, media studios, and event spaces tailored to HealthTech startups and innovators, and opened in 2025. Residents connect with a community of over 2,500 healthcare professionals, investors, and partners including UCLPartners and the NHS Innovation Accelerator.

Halkin

CoworkingOtherBritish

Halkin is a family-run provider of design-led, flexible office spaces across London, offering private offices, co-working desks, meeting rooms, event spaces, and virtual offices. Founded in 2015, the company operates ten locations across the City of London, Mayfair, Euston, Southwark, and Watford, positioning itself on premium workplace design and award-winning customer service.

Hambro Perks

VCSaaSProptechBritish

Hambro Perks was a London-headquartered international investment firm focused on private technology investing, partnering with founders across early to growth stages via venture, EIS, co-investment, debt and secondary funds. Founded in 2013, the firm rebranded as Salica Investments in 2024 following the departure of co-founder Dominic Perks and the passing of co-founder Rupert Hambro, and now manages 14 funds with over 126 active investments across fintech, healthtech, sustainability, and productivity sectors.

Happl

StartupSaaSAIBritish

AI-powered global employee benefits operating system for multinational employers, managing benefits, insurance and compliance across 160+ countries.

Happyrobot

ScaleupAILogisticsForeign

Autonomous AI workers that communicate, coordinate, and operate at scale across the real economy.

Harlequin CF

Professional ServicesFinanceBritish

Harlequin Corporate Finance is a specialist corporate finance consultancy based in Henley-on-Thames, established in 1999, that advises growing businesses seeking acquisition opportunities in the IT and telecommunications sectors. The firm develops acquisition strategies, identifies and evaluates target companies, and manages negotiations and deal closures on behalf of acquisitive clients, with over 37 completed transactions to date.

Harmattan AI

ScaleupDefenceDeep TechForeign

Coordinated Saturation at the Edge

Harmonic Security

StartupCybersecurityAIForeign

Zero-touch data-protection platform using pre-trained language models to prevent sensitive data from leaking into generative AI tools, requiring no manual labelling or rule configuration.

Harness

ScaleupSaaSAIForeign

Harness is a unified AI software delivery platform to manage the SDLC using purpose-built AI agents.

Harvest London

ScaleupAgritechFoodtechBritish

Urban hydroponic and vertical farming operator growing herbs, leafy greens and specialty crops for restaurants, retail and food-service partners.

Harvey

ScaleupLegalAIForeign

Legal AI tailored for leading law firms and corporate legal teams worldwide. Harvey streamlines contract analysis, due diligence, compliance, and litigation.

Hatch Enterprise

CommunityOtherIncubator / AcceleratorBritish

Hatch Enterprise is a UK registered charity and social enterprise, founded in 2014 in South London, that supports underrepresented entrepreneurs — including women, ethnic minorities, disabled, and neurodivergent founders — to start and grow businesses. Its programmes include cohort accelerators, one-to-one consultancies, masterclasses, and peer mentoring, and it has supported over 10,000 founders since inception. Partners include the JP Morgan Chase Foundation, NatWest, and UBS.

Hawk AI

ScaleupFinanceAIForeign

Award-winning AML & CFT technology powered by explainable AI increases your risk coverage, helps you identify more crime, and reduces your false positives.

Haymarket Ventures

CorporateMediaAIBritish

Corporate venture arm of Haymarket Group investing in early-stage media and technology startups across martech, adtech, fintech, and greentech.

Headline

VCOtherForeign

Global venture capital firm investing in early- and growth-stage companies across the US, Europe, Asia, and Latin America; portfolio includes Bumble, Mistral AI, and Farfetch.

Headstart Team

StartupEdtechCommunityBritish

Headstart Global runs eight-week startup micro-internship programmes that pair university students in small teams with startup partners on live business briefs, spanning strategy, product, fundraising and growth work. Founded by two UCL students, it has built a community of thousands of students and hundreds of startup partners across dozens of universities.