216 companies added to London Mempool in September 2026

London AI cloud company that builds and runs GPU data centres across Europe and the US.

Alphabet spinout led by Demis Hassabis using AI to design new drugs.

Builds end-to-end AI driving software that lets cars drive themselves without detailed maps.

Online payment processing for large merchants and enterprises around the world.

Zenobe builds and runs grid-scale battery storage and provides charging, batteries and software to electrify bus and truck fleets.

AI voice company making realistic speech, voice cloning and voice agents, with its main hub in London.

AI lab building self-improving AI to automate research and discovery, with offices in London and San Francisco.

Licensed UK digital bank that also sells its Engine banking software to other banks.

Decision intelligence software that connects data to spot fraud, financial crime and risk for banks and governments.

AI video platform that turns text into videos with realistic AI avatars for business training.

Cloud-native core banking software (Vault) used by large banks to replace legacy systems.

Physics AI platform that helps engineers in aerospace, auto and energy design and test products faster.

Apprenticeship and upskilling programmes that train employees in tech, data and AI skills.

Consumer electronics maker of smartphones, earbuds and headphones, founded by Carl Pei.

Lending platform that gives small businesses fast loans, funded by institutional investors.

Digital health platform for remote patient monitoring, clinical research and disease management apps.

AI infrastructure company that finances, builds and runs AI compute. Offices in London, Palo Alto and New York.

Booking marketplace and business software for salons, spas and wellness businesses.

Online marketplace where private sellers list cars and verified dealers bid to buy them.

Period, ovulation and pregnancy tracking app with over 70 million monthly active users.

AI-powered data and analytics platform for debt and credit market professionals.

Designs AI inference chips that run large models much faster and cheaper than today's GPUs.

AI workforce platform helping large enterprises hire, redeploy and reskill staff using skills intelligence.

Workplace finance app giving employees earned-wage access, savings, pensions and budgeting tools through their employer.

Trains EDEN biological AI models on proprietary natural-world genomic data to design new medicines.

Builds voice AI agents that answer customer service calls for large companies.

AI notepad that writes up your meeting notes without adding a bot to the call.

Payments infrastructure that automates payroll, supplier payments and collections for businesses and software platforms.

Savings platform letting people and businesses hold cash across hundreds of accounts from 65+ banks in one place.

Computer vision AI that assesses car and property damage from photos to speed up insurance claims.

Household energy supplier that also builds its own renewable generation, founded by ex-Revolut executives.

AI money app and chatbot that helps people budget, save and manage their spending.

UK digital bank for mass-affluent savers and borrowers, with a banking-as-a-service tech arm, Monument Technology.

Unified payments infrastructure letting merchants connect, optimise and manage many payment providers from one platform.

AI platform that reads, negotiates and manages contracts for in-house legal teams.

Property operations software for landlords and housing providers to manage repairs, contractors and compliance.

Bank-owned payment system that settles wholesale payments on a blockchain, backed 1:1 by central bank money.

Platform for building, testing and sharing skills and context that guide AI coding agents like Claude Code and Cursor.

Gut health and nutrition company running large-scale studies and selling at-home tests and food products.

AI-native CRM that builds itself around a company's data for go-to-market teams.

AI-powered legal platform and law firm giving consumers and small businesses affordable access to vetted lawyers.

Software that splits AI workloads across many different chip types to run them faster and cheaper.

Data platform AI teams use to curate, label and evaluate training data, especially for physical AI.

AI recruiting platform with agents for sourcing, screening, interview notes and hiring reports.

AI platform that screens customers and transactions for money laundering, sanctions and fraud risk.

AI platform that cleans and enriches bank transaction data for personalisation, lending and customer insight.

Regulated digital asset custodian offering custody, staking, tokenisation and collateral services to institutions.

AI platform running scheduling, HR and payroll for frontline businesses in hospitality, retail and care.

Incident management, on-call and status page platform with AI agents that help teams resolve outages.

Agentic AI research platform and biomedical knowledge graph that helps pharma R&D teams find targets and biomarkers.

Licensed UK digital bank paying interest on current accounts, with savings, ISAs and loans.

Pricing and underwriting platform for commercial insurers, now adding AI agents that process broker submissions.

AI workflow platform that turns financial data into client-ready decks, memos and reports for banks and investors.

Drug discovery company combining machine learning and human cell experiments to find new medicines.

App for immigrants to send money home and access financial services across 30+ countries.

Builds thermal-imaging satellites that show heat and activity at sites like factories, data centres and energy plants.

AI procurement platform that runs company buying, supplier onboarding and supplier risk management.

Tech-enabled research organisation running faster, fixed-fee clinical trials for biotech and pharma.

Open banking API that lets companies pull bank data and start payments across thousands of European banks.

Payments and banking rails for crypto firms, with FCA-authorised and EU-licensed entities.

AI that helps IT teams understand, change and migrate complex enterprise systems like SAP.

Two AI agents: Jack coaches job seekers, Jill recruits for companies, and they match each other.

Network of software-run factories making precision parts for aerospace, defence and energy companies.

AI platform that helps patent attorneys draft, prosecute and litigate patents faster.

Care management, rostering and finance software for UK homecare providers.

Fully licensed UK bank offering API-first banking-as-a-service so fintechs can build financial products.

Money transfer app for diaspora sending money to Africa and Asia, plus the Rafiki B2B payments API.

Generative AI lab designing new proteins and antibodies, founded by AlphaFold co-developer Simon Kohl.

Stablecoin payments and treasury platform that lets banks, payment firms and businesses settle money instantly.

AI analyst for real estate and real asset investors that speeds up underwriting and reporting.

AI assistant that sorts your inbox, drafts email replies and takes meeting notes.

Lancaster University spinout that attacks and tests AI systems to find security holes before hackers do.

Billing and quote-to-cash software that automates invoicing and revenue collection for B2B finance teams.

FCA-regulated London exchange, broker and custodian for tokenised real-world assets such as money market funds and bonds.

Security and governance platform that lets enterprises discover, monitor and control their AI agents.

AI agent platform (V7 Go) automating document-heavy work in finance, insurance and legal, plus data labelling tools.

Browser-based AI video creation and editing platform for generating, subtitling and branding videos without production skills.

Uses AI-designed enzymes to break down plastic and textile waste into recycled nylon polymers.

Platform supplying vetted human participants for research and for AI model training and evaluation.

Billing platform that helps AI agent companies price, track costs and prove value to customers.

AI-native contract management platform for drafting, agreeing and managing contracts end to end.

Platform that helps businesses and VC funds see currency exposure and automate FX hedging.

AI agents that investigate code and cloud vulnerabilities and flag only the ones that matter.

Payments and finance automation that helps small businesses get paid on time, moving into AI credit control.

AI agents that handle customer support, compliance and back-office operations for banks and fintechs.

AI system that forecasts real-world events to help organisations make better decisions.

AI platform for the full patent lifecycle, from invention ideas to drafting and prosecution.

Industrial AI that monitors, forecasts and optimises refineries, oil and gas and petrochemical plants.

Simulation and digital-twin software for defence, government and infrastructure decision-making.

Uses AI to build custom operations software for utilities, logistics and field service companies.

AI platform that indexes a private equity fund's documents and data to speed up deal work.

Tracks and improves how brands show up in answers from ChatGPT and other AI search engines.

Company behind the Pydantic Python validation library, the Pydantic AI agent framework and Logfire observability.

Inference platform that lets enterprises run open-source AI models on their own infrastructure, cheaply.

AI-native research and analysis platform for investment banks and asset managers.

AI platform that automates admin and compliance paperwork for financial advice firms.

At-home hormone and fertility testing with specialist care for women.

Business accounts, cards, cashflow and treasury tools for fast-growing digital companies.

Defence software (Cobalt) that lets operators control mixed fleets of drones, robots and sensors from one platform.

Shows brands how they appear in ChatGPT, Claude and Gemini answers and how to improve it.

AI operating system for spare parts distributors covering demand forecasting, pricing and obsolescence decisions.

Lets non-coders build and run AI agents and automations by describing them in plain language.

Imperial College spinout using AI to analyse and design advanced materials such as EV battery electrodes.

Builds brain-inspired AI that lets robots and drones adapt in real time on the device.

AI forecasting and user acquisition agents that help mobile game studios grow profitably.

AI agents that help banks and lenders speed up commercial lending and credit work.

Governance platform that helps companies control risk, cost and use of AI tools and agents.

Design tool that lets product teams design and prototype directly inside their real codebase.

Treasury, payments and finance automation platform that helps businesses manage and earn on their cash.

Simulates how audiences and stakeholders will react, so companies can test decisions before making them.

AI-powered platform that helps hardware and climate companies raise and manage debt financing.

AI platform that helps pharma teams make commercial, portfolio and competitive intelligence decisions faster.

AI studio that lets teams create on-brand videos, podcasts and audio from text using AI voices, music and visuals.

Guardrails, identity and audit layer that checks AI agent payments against company rules before they go out.

Cloud core banking platform that lets banks such as Westpac and Chase UK launch products faster.

Builds Aave, one of the largest decentralised lending protocols, plus related crypto products.

Consumer lender that uses AI and open banking data to judge affordability and offer fairer loans.

Messaging and communication software used by NHS GP practices and hospital trusts to talk to patients.

AI software that helps defence and security teams analyse large volumes of information and make faster decisions.

Digital bank for established small and medium-sized businesses, offering accounts, savings and lending.

AI safety company researching model scheming and selling Watcher, a monitoring tool for coding agents.

Nasdaq-listed company selling quantum-safe encryption and post-quantum migration tools to governments, defence and telecoms.

Specialty insurance platform for brokers and underwriters, covering algorithmic underwriting and delegated authority.

Generative AI platform that helps companies and nonprofits write bids, proposals, grants and RFP responses.

Robotic lab automation platform that runs life-science experiments end to end for pharma and biotech labs.

Software that connects EV chargers, batteries and heat pumps to energy markets so they earn money supporting the grid.

Institutional crypto liquidity provider and OTC market maker, majority-owned by Japan's SBI Holdings.

FCA-registered crypto derivatives data, volatility analytics, research and on-chain options pricing oracles for institutions.

Business credit cards and spend management for small businesses in the UK and US.

App-based car finance lender that gives buyers a budget before they shop.

Online car marketplace where dealers compete with offers to buy or sell your car.

Home healthcare provider using AI and data to deliver care visits and cut hospital admissions.

App for saving and investing, offering savings accounts, cash ISAs and investment funds.

UK cloud provider offering Kubernetes, GPU compute and sovereign AI services from its own data centres.

Clearing bank giving fintechs and banks UK payments access, accounts and embedded banking.

Researches and builds blockchain protocols and peer-to-peer platforms for decentralised financial markets.

Free credit scores and reports, plus a marketplace that matches users to loans and cards.

APIs linking small business accounting and banking data to banks and lenders for faster credit and advice.

Builds non-invasive bedside devices that monitor brain blood flow and pressure in critically ill patients.

AI safety lab building Cognitive Emulation, an architecture for more controllable and interpretable AI.

Institutional crypto custody, collateral and off-exchange settlement (ClearLoop) provider.

UK sovereign AI lab training Lumen coding models and agents that run in secure or air-gapped environments.

Makes quantum random number generator hardware that supplies true randomness for encryption.

Makes chip-level security (PUF roots of trust) and the QuarkLink platform to secure connected IoT devices.

Cross-border payments, FX risk management and trade finance for businesses, majority-owned by Santander.

Blockchain analytics used by exchanges, banks and governments for crypto compliance and risk screening.

Web3 and AI developer community running programmes, bootcamps and hackathons from a Shoreditch innovation hub.

Develops, builds and runs large battery storage sites across the UK and Europe.

AI legal assistant that drafts, reviews and negotiates contracts for businesses and in-house teams.

Self-learning AI control software that cuts fuel use and emissions in cement, glass, steel and mining plants.

Bank payment and direct debit network for recurring and one-off business payments.

Alphabet's main AI research lab, behind Gemini and AlphaFold, founded and headquartered in London.

Recipe box company delivering ingredients and recipes for home cooking.

AI cameras and software that identify waste on recycling lines so plants recover more material.

AI and simulation software for military training, mission planning, wargaming and command and control.

Portfolio and risk management software for institutional crypto funds and trading firms.

Munich-headquartered defence AI company building strike drones, underwater systems and battlefield software, with a London office.

Builds industrial humanoid robots for factories and warehouses, headquartered in London.

Online lender giving small businesses in the UK and Germany fast, flexible working-capital loans.

Operating system software that utilities use to run billing, customer service and energy assets.

Online consumer lender offering personal loans, credit cards and car finance using automated underwriting.

Clinical AI for mental health services, handling patient intake, assessment and between-session support.

Regulated institutional spot crypto exchange run by London's LMAX Group, a long-standing FX exchange operator.

Building autonomous AI to guide satellites that protect high-value assets in orbit.

Car and home insurance built for people overlooked by traditional insurers, including migrants to the UK.

App for saving, investing, pensions and Lifetime ISAs, aimed at helping people build wealth.

UK digital bank with app-based current accounts, savings and business banking.

Builds quantum computing apps for music, games and media, including the consumer game Quantum Backrooms.

Builds the Nethermind Ethereum execution client plus blockchain security audits, research and engineering services.

Online health clinic for weight loss, men's and women's health, with prescriptions and coaching.

Bank that lends to growing mid-sized businesses in the UK and US.

Renewable-focused gas and electricity supplier and Britain's largest household energy supplier.

Smart home EV chargers and app that charge cars when power is cheapest and greenest.

Banking-as-a-service platform for accounts, payments, FX and stablecoin money movement for businesses.

Uses AI to design advanced materials and data centre cooling hardware, and is expanding into energy and semiconductors.

Builds photonic quantum computers that run in normal data centres alongside AI and HPC systems.

Builds PRISM, a pure photonic switching network that speeds up AI data centres and cuts energy use.

London venture firm and accelerator investing in early-stage crypto and AI startups.

Merchant-of-record payments platform that handles billing, tax and compliance for software companies.

Cloud-based card issuer-processor that lets banks and fintechs launch physical and virtual cards.

LSE-listed online pension provider that combines and manages people's pensions in the UK and US.

Builds quantum algorithms so today's quantum computers can tackle real problems in materials and chemistry.

Money app that automates saving and investing for users in the UK and several EU countries.

AI biology lab that builds foundation models from its own data to diagnose and treat brain disease.

London company behind Overledger and Quant Flow, software that lets banks program money and connect to blockchains.

Builds quantum computers on standard silicon chip technology, designed to fit in normal data centres.

Global finance super-app for banking, payments, investing and crypto, with a full UK banking licence.

Global business payments platform with multi-currency accounts, FX and cross-border payouts for companies.

Company prepaid cards and spend management software giving staff controlled spending and finance teams oversight.

Builds open generative AI models for images, video, audio and 3D, best known for Stable Diffusion.

Card readers, point-of-sale and business accounts for small merchants.

AI reinsurance intelligence platform helping brokers and cedents run client work and programme placement.

Ratings and data that show buyers and investors how good carbon credits and climate projects really are.

AI platform that generates privacy-safe, production-like test data for software testing, migrations and AI agents.

AI-powered platform that lets businesses buy electricity straight from generators without wholesale markups.

Savings and mortgage app that helps first-time buyers build a deposit and get onto the property ladder.

Card payments, business accounts and funding for small local businesses across Europe, formerly SaltPay.

Business current accounts and admin tools for small businesses in the UK, India and Germany.

Commission-free app for trading and investing in stocks, ETFs and ISAs.

Rail and coach ticketing app and website selling tickets across the UK and Europe.

London research and development hub building core protocol and apps on the Tezos blockchain.

Open banking payments network letting merchants take pay-by-bank payments across the UK and Europe.

AI vision software that turns defence and security cameras into autonomous threat detectors, including drones.

Investing app for younger investors with saving, investing and automation tools in one place.

Algorithmic trading firm that provides liquidity across crypto markets and is expanding into traditional markets.

Crypto and stablecoin payments app and card issuer, a principal member of Visa and Mastercard.

Low-cost international money transfers and multi-currency accounts for people and businesses.

AI research platform that automates due diligence and background checks on people and companies for banks, law firms and corporates.

Rewards credit card focused on travel, dining and going out, with points redeemable for flights and hotels.

Tech-led motor insurer for gig workers, fleets and everyday drivers, using telematics to price policies.

Parent of WorldRemit and Sendwave, apps for sending money from 50+ countries to 130+ countries.

Buy now pay later and payments app funded partly by advertising, letting shoppers split purchases.

Bank-backed crypto custodian offering custody, staking, trading and settlement services to institutions.

Licensed UK digital bank offering loans, credit cards and savings. It started out as a peer-to-peer lending pioneer.