Directory

Mercor

ScaleupAIForeign

Mercor is organizing human intelligence to power the AI economy. We are powering frontier research, AI benchmarks, and AI agent training at scale for the top AI labs and enterprises.

Meridian Growth Capital

VCSaaSAIBritish

Meridian Growth Capital is a Southampton-based early-stage venture capital firm founded in 2009. It invests between £50,000 and £500,000 in seed and early-stage companies, with a focus on technology, telecommunications, biotechnology, and media sectors. The firm takes minority stakes and backs proven management teams across the UK, with notable exits including Blis (4x) and loveholidays.

Merkle Science

StartupCrypto & Web3CybersecurityForeign

Next generation crypto threat detection, risk management and compliance for businesses, banks and government agencies. Sign up now

Messium

StartupSpaceAIBritish

Hyperspectral satellite and AI crop-growth models to measure crop nitrogen from space; precision-fertilisation system for wheat optimising nitrogen use and detecting nutrient deficiencies.

Meta

CorporateConsumerAIForeign

Meta Platforms is a global technology conglomerate operating the world's largest social media platforms, including Facebook, Instagram, and WhatsApp, reaching over three billion daily active users. The company also develops augmented and virtual reality hardware and software through its Reality Labs division. Meta is a major investor in AI research and infrastructure.

MetaSenZ

StartupClimateBritish

King's College London nano-optics spin-out developing ultrasensitive hydrogen gas sensors for real-time leak detection and safer production, transport and storage across the hydrogen value chain.

Metal Morph

StartupClimateDeep TechBritish

Metal Morph recovers aluminium and iron-based chemicals from water and wastewater treatment, so utilities and industries can recycle what they once disposed of.

Metaview

ScaleupAISaaSForeign

Source, review, screen, interview, and hire with AI agents that share context and handle the work between first search and final offer.

Meticulous

StartupSaaSAIBritish

Meticulous records developer and user interactions with a web application and generates a continuously evolving suite of visual end-to-end tests from them, adding and retiring tests as the codebase changes so teams do not write or maintain them by hand. Founded by brothers Gabriel and Quentin Spencer-Harper, previously at Dropbox and Palantir.

Metomic

ScaleupCybersecurityBritish

Metomic provides data security posture management (DSPM) and next-generation data loss prevention for SaaS and generative AI tools, offering agentless, API-based discovery, classification, and protection of sensitive data across platforms such as Slack, Google Workspace, and Jira.

Metris Energy

StartupClimateAIBritish

AI-powered SaaS platform (MetrisOS) for designing, managing, and monetising commercial rooftop solar projects end-to-end, including power purchase agreement billing.

Microbiology Society

Ecosystem Bodies, Catapults & InstitutionsBiotech & Life SciencesDeep TechBritish

The Microbiology Society is a UK-based membership charity and learned society for scientists working in microbiology, founded in 1945 as the Society for General Microbiology. With over 8,000 members across more than 100 countries, it is the largest learned microbiological society in Europe, publishing eight peer-reviewed journals and awarding over 500 grants annually. It advances understanding of microbiology through conferences, publications, and community support.

Microsoft

CorporateSaaSCybersecurityForeign

Microsoft is one of the world's largest technology corporations, providing software, cloud computing, hardware, and AI services to consumers and enterprises globally. Its portfolio includes Windows, Microsoft 365, Azure cloud platform, GitHub, and the Xbox gaming ecosystem. The company has made major investments in AI through its partnership with OpenAI and integration of Copilot across its products.

Midven

VCSaaSAIBritish

Midven is a Birmingham-based venture capital fund manager, now operating as part of Future Planet Capital, that has been investing in early-stage, fast-growing SMEs in the West Midlands since 1993. The firm manages funds including the Midlands Engine Investment Fund and the West Midlands Co-Investment Fund, deploying up to £2m per investment into high-growth technology and SaaS businesses.

Mills & Reeve

Professional ServicesLegalBritish

Mills & Reeve is a British law firm operating from seven offices across the United Kingdom, with approximately 1,400 employees and over 850 lawyers. The firm specialises in corporate and commercial law, real estate, health, education, insurance, technology, and private wealth, serving clients from FTSE 250 companies to fast-growth startups. It ranks among the UK's top 40 law firms by revenue.

Mimecast

CorporateCybersecurityBritish

Email security, archiving, and human-risk management platform protecting organisations against phishing, business email compromise, and data loss; taken private by Permira for approximately $5.8 billion in 2022 and continues to operate under the Mimecast brand.

Mimica

ScaleupClimateConsumerBritish

Smart-packaging company producing Bump, a bio-reactive label or cap that deteriorates at the same rate as perishable food, giving consumers a tactile, real-time freshness indicator to reduce food waste.

Mimo

ScaleupFinanceBritish

B2B payments and financial management platform for small and medium-sized businesses and accountants, automating accounts payable and receivable, cash flow, foreign exchange, and bookkeeping.

Mind the Product

CommunitySaaSForeign

Mind the Product is the world's largest community for product managers, designers and developers, founded in London in 2010. It provides conferences, workshops, editorial content and a weekly podcast serving over 300,000 product professionals globally. The community was acquired by Pendo in 2022 and continues to operate as a standalone brand.

Mindgard

StartupAI SafetyCybersecurityForeign

AI and LLM security platform offering dynamic application security testing for AI, automated red-teaming, threat detection, and runtime protection of machine learning models deployed in production.

Mindspace

CoworkingReal EstateForeign

Mindspace is a global flexible workspace operator founded in 2014 in Israel, offering private offices, coworking memberships, meeting rooms, and event venues across 40+ locations in 20 cities in Europe, North America, and Israel. The company has London locations and has raised $72 million in funding.

Minerva Business Angels

Ecosystem Bodies, Catapults & InstitutionsOtherAIBritish

Minerva Business Angel Network is a not-for-profit angel investor network established in 1994 and based at the University of Warwick Science Park, matching high-growth technology startups in the Midlands with experienced private investors. The network operates ten investment groups across regions including the East Midlands, Thames Valley, West Midlands, and Yorkshire, and has supported over 100 companies to raise more than £63 million.

Minimum

StartupClimateSaaSBritish

Carbon accounting and management SaaS platform that gives organisations a single system of record for surfacing, calculating, and disclosing their emissions footprint, with integrations for enterprise reporting requirements.

MintNeuro

StartupBiotech & Life SciencesDeep TechBritish

Imperial College London spin-out designing scalable, low-power semiconductor chips for minimally invasive neural implants, enabling sensing, stimulation, and on-chip signal processing for clinical applications including epilepsy, movement disorders, and urinary dysfunction.