Directory

MassChallenge

Incubator / AcceleratorOtherFinanceGrantmakerForeign

MassChallenge is a global, non-profit, zero-equity startup accelerator founded in 2009 that supports founders tackling complex problems across healthcare and life sciences, climate, AI and autonomy, and cybersecurity. It takes no equity from the startups it supports and awards millions in equity-free cash prizes annually through corporate partnerships. It operates programmes across the United States, Israel, Switzerland, Mexico, and the United Kingdom, with its UK hub located at the Royal Docks Centre for Sustainability at the University of East London.

Mastercard

CorporateFinanceAIForeign

Global payments technology corporation connecting consumers, financial institutions, merchants, and governments in over 200 countries.

Match Group

CorporateConsumerForeign

Match Group is the global leader behind Tinder, Hinge, and other leading dating brands, helping millions worldwide build meaningful connections.

MatchingMind

StartupBiotech & Life SciencesAIBritish

AI-powered matchmaking platform connecting people to peer support and mental health specialists based on lived experience; serves ethnic-minority communities.

Materials Nexus

ScaleupAIDefenceBritish

Deep-tech using AI plus quantum calculations to discover new materials; notably designed a rare-earth-free permanent magnet (MagNex) for EV motors.

Materra

StartupClimateBritish

AgTech company enabling brands to source regenerative cotton by working directly with thousands of farmers in India, providing supply-chain traceability and data tools to decarbonise agricultural commodities.

Matoha

StartupAIClimateBritish

Manufactures handheld AI/NIR-spectroscopy material-identification scanners that identify plastics and textile composition in under a second for sorting and manufacturing QC.

Matta

StartupAIBritish

Industrial AI vision platform; AI agents detect defects, measure to micron accuracy, count parts and trace production in real time across factory lines.

Maven Securities

CorporateFinanceBritish

Maven is a market-leading proprietary trading firm, allocating internal capital between discretionary, systematic and market-making strategies.

Mayfair

VCFinanceBritish

A UK mid-market private equity firm investing £30 to 150 million in digital businesses, backing management teams through international expansion and M&A.

Maze

StartupCybersecurityAIBritish

Cybersecurity startup deploying autonomous AI agents that investigate and resolve cloud security vulnerabilities, identifying exploitable risks and remediating automatically.

McKenzie Intelligence Services

ScaleupSpaceDeep TechBritish

Geospatial intelligence: fuses satellite, aerial and drone imagery with remote sensing to measure impact of natural and man-made catastrophes for insurers and government.

Mealia

StartupConsumerAIBritish

AI grocery assistant generating personalised, budget-aware meal plans from supermarket prices; aimed at food-insecure households.

Meatly

StartupBiotech & Life SciencesConsumerBritish

Cultivated (lab-grown) meat company and first in Europe to receive approval to sell cultivated meat for pet food; building Europe's largest cultivated-meat bioreactor facility in London.

MedCity

Ecosystem Bodies, Catapults & InstitutionsAIBritish

MedCity is the cluster organisation for London's world-leading health and life sciences sector, launched in April 2014 by the Mayor of London in partnership with the city's Academic Health Science Centres. It helps life sciences companies establish, expand, and thrive through expert guidance, professional networks, and actionable support across diagnostics, digital health, advanced therapies, and data-driven innovation. Since 2023 it has operated as part of London & Partners, London's growth agency.

Medicines Discovery Catapult

Ecosystem Bodies, Catapults & InstitutionsBiotech & Life SciencesDeep TechBritish

Medicines Discovery Catapult (MDC) is a national life sciences service dedicated to driving breakthroughs in medicine to improve patient outcomes, operating as part of the Innovate UK Catapult network. It provides UK innovators with access to advanced drug discovery technologies, specialised scientific expertise, and industry knowledge to de-risk early-stage drug discovery projects. The organisation hosts capabilities in radiochemistry, mass spectrometry, and advanced imaging at its Alderley Park site.

Medly AI

StartupEdtechAIBritish

Medly is built for two things: learning, and improving your grades. Personalised study, exam-style practice and instant feedback — for school and university.

Medpace

CorporateBiotech & Life SciencesDeep TechForeign

Medpace is a global full-service Contract Research Organisation (CRO) specialising in drug and biologic clinical development, with London-based operations and staff.

MeiraGTx

ScaleupBiotech & Life SciencesDeep TechForeign

Clinical-stage developer of AAV gene therapies (eye disease, Parkinson's, salivary gland) with gene-regulation/riboswitch technology and in-house GMP viral vector manufacturing; listed on Nasdaq (MGTX).

Meltwind Advisory

VCBiotech & Life SciencesDeep TechBritish

Cambridge-based investment advisory firm founded by Abcam's Jonathan Milner, backing early-stage life science tools, therapeutics, and medtech companies.

Mendee

StartupAIBritish

Social enterprise with AI hub 'SiBot' giving refugees multilingual support and helping non-profits with language and digital literacy.

Mendelian

StartupBiotech & Life SciencesAIBritish

Clinical decision-support software (MendelScan) using AI case-finding to help GPs identify and diagnose rare disease patients earlier from primary-care records.

Mercia

VCFinancePEBritish

Mercia Asset Management PLC is a UK-based specialist asset manager founded in 2010, focused on supporting high-growth small and medium-sized enterprises across the regions of the United Kingdom. The firm provides capital across venture capital, private equity, private debt, and property development finance, with approximately £2 billion in assets under management. Mercia deploys between £100,000 and £10 million per investment and directs approximately 85% of its capital to businesses outside of London.

Mercia Ventures

VCSaaSAIBritish

UK venture capital firm backing ambitious founders at Series A and beyond, part of the Mercia Asset Management group.