01Frontier AI
OpenAI
Frontier AI lab and maker of ChatGPT and the GPT models.
King's CrossGrowth
The AI labs and startups building the UK's AI scene.
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Frontier AI lab and maker of ChatGPT and the GPT models.
AI safety company and maker of the Claude family of models.
Alphabet's AI research lab behind the Gemini models and AlphaFold.
Embodied-AI self-driving software, launching London robotaxi trials.
Turns text into professional videos with lifelike AI avatars.
AI voice generation and text-to-speech for the digital world.
Alphabet's AI drug-discovery company designing therapeutics with AlphaFold-derived models.
Meta's FAIR lab researches NLP, vision and reinforcement learning in London.
Microsoft AI's London hub advances state-of-the-art foundation models.
Elon Musk's frontier AI lab and maker of the Grok chatbot.
Paris-based open-weight AI firm building LLMs and the Le Chat assistant.
Enterprise AI building secure LLMs and agents for businesses.
Cologne-based AI firm specialising in neural machine translation.
Open-model generative AI behind Stable Diffusion image and media tools.
AI code editor opening its European HQ in London.
AI answer engine building out a London office for Europe.
Data and AI platform quadrupling its London HQ.
US generative-video firm opening a London European HQ.
AI software for legal and professional-services firms.
Swedish app-builder opening a London office; build software via natural language.
London AI notepad that enhances notes from back-to-back meetings.
Swedish legal AI platform with a London engineering hub.
Decision intelligence connecting siloed data to fight financial crime.
Speech-to-text and voice AI for real-time transcription in every language.
Builds human-like enterprise voice AI agents for customer service.
Applied AI for enterprise decision intelligence, acquired by Accenture.
Computer vision AI assessing vehicle and property damage for insurers.
AI document and biometric identity verification, now part of Entrust.
AI platform that reviews, drafts and negotiates legal contracts.
Generative AI platform accelerating biomedical research and drug discovery.
AI-powered money assistant app for budgeting and financial advice.
Professional apprenticeships in AI, data and tech skills.
Designs AI processors and compute systems, now owned by SoftBank.
LLM evaluation and prompt platform; team joined Anthropic in 2025.
AI avatar video platform for corporate learning content.
AI-native data and analytics platform for debt capital markets.
AI sales intelligence and engagement platform with 210M+ contacts.
David Silver's lab building reinforcement-learning systems toward superintelligence.
Agent-native execution platform automating sales workflows for revenue teams.
AI-native simulation platform for industrial engineering and manufacturing.
AI contract drafting, review and negotiation for legal teams.
AI-powered talent lifecycle and skills intelligence platform for enterprises.
AI-driven financial crime and fraud risk detection platform.
Open-source machine learning model and dataset hub.
AI training data and document automation platform for enterprises.
AI platform discovering treatments for rare diseases.
AI-driven home healthcare platform reducing strain on the NHS.
AI knowledge and agent platform, now part of Workday.
AI hyperscaler providing GPU cloud and data-centre infrastructure.
AI knowledge-graph platform for target identification and drug discovery.
AI assurance and productivity tools for UK financial services.
Platform for testing the security of AI models.
End-to-end generative AI platform for building enterprise agents.
Conversational AI agents transforming customer service.
AI pricing and revenue management platform for hotels.
AI platform automating legal contract drafting and review.
Generative AI designing novel materials for carbon capture.
AI for inventory and pricing optimisation, now part of UiPath.
Real-time AI fraud and financial-crime prevention, owned by Visa.
AI-powered reputation, risk and media intelligence from external data.
Oxford spinout using AI to auto-generate Java unit tests.
AI teammates that automate DevOps tasks for engineering teams.
Modular AI backend stack for developers building AI software.
Biotech using machine learning and multi-omics for drug discovery.
ML-driven protein engineering platform discovering novel therapeutic antibodies.
UK sovereign defence-tech firm building applied AI for intelligence.
Self-learning AI cybersecurity detecting and responding to threats autonomously.
AI platform automating customer support across voice and digital channels.
Oxford spinout building self-driving software for industrial mobility.
London BCG spinout using AI for frontline worker safety.
Y Combinator-backed maker of Genie, an autonomous AI software engineer.
Frontend cloud and maker of Next.js and the v0 AI app builder.
AI operating system that modernises and migrates complex enterprise systems like SAP.
AI lab building generative world models: interactive, explorable 3D worlds.
Spec-driven development platform where engineers define specs and AI agents build, test and maintain the code.
AI-native CRM that automates and customises go-to-market workflows for sales, operations and revenue teams.
AI executive assistant that organises inboxes, drafts email replies and writes meeting notes automatically.
AI-native procurement and spend management platform centralising purchasing, supplier management and risk governance.
Payments orchestration infrastructure that connects processors, optimises routing and unifies the payment stack.
Incident management platform that helps engineering teams respond to, resolve and learn from outages.
Security platform protecting AI agents from prompt injection, tool misuse and data exfiltration across their lifecycle.
AI inspection platform that captures field findings via audio and video, then autofills forms and generates reports.
Builds autonomous AI customer-support agents purpose-built for regulated industries like financial services.
Outcome-based billing infrastructure so businesses can charge for AI agent results rather than seats.
AI-native entertainment studio producing films and series built from the ground up for AI collaboration.
Ecommerce operating system unifying cross-border selling, tax, returns and agentic storefronts for global brands.
Deploys AI agents that investigate, triage and remediate cloud and code security vulnerabilities.
AI-powered lettings and property management platform automating tenant, payment and maintenance workflows.
Uses agentic AI to automate financial close, reconciliations and journal entries for enterprise finance teams.
AI-native customer support platform built for scaling B2B teams across Slack, chat and email.
AI customer service agents that handle calls, book jobs and manage diaries for trades and field-service businesses.
AI that automatically writes and maintains end-to-end frontend browser tests without engineers writing them.
Fleets of AI legal agents that automate contract review and support in-house legal teams.
AI-native infrastructure for energy transactions, stripping hidden fees and inefficiencies from every deal.
AI for the legal side of commercial real estate: reads title deeds, leases and searches to pull out what matters, sold to law firms' property teams as much as to real estate businesses.
Foundation models that optimise high-value operations in refineries, LNG plants and petrochemical facilities.
Predictive attention AI that forecasts where people look to help brands optimise creative and ad assets.
Deploys proactive AI employees inside Slack and Teams that automate workflows and complete real tasks.
Agentic finance platform automating invoicing, payment collection and cashflow for small businesses.
AI agents that stress-test and quality-assure other AI products; YC W24, founded by Oxford and Imperial PhDs.
AI workspace built for financial services, automating analysis and client-ready documents for banks and investors.
AI security engineer that uses LLMs to find and fix complex business-logic vulnerabilities in codebases (YC F24).
Fast, reliable AI browser agent API that autonomously performs web actions across sites (YC F24).
AI workforce automating financial-crime compliance across screening, KYB, KYC and transaction monitoring for banks (YC S24).
No-code AI co-pilot using Bayesian optimisation to accelerate chemical process development for pharma and biotech (YC S24).
Uses generative AI to draft the technical and environmental engineering reports required for construction projects (YC S24).
AI agent that automates optimisation and deployment of model inference on edge hardware (YC S24).
AI operating system automating compliance, back-office and research workflows for wealth managers and advisers (YC S24).
LLM-powered feed app distilling newsletters, papers and articles into short, personalised insights (YC S24).
Web-based AI 3D art suite taking ideas from concept to production-ready, textured assets (YC S24).
Chrome sidebar extension giving contextual AI assistance, drafting emails and replies across your browser tabs (YC S24).
AI catalogue-operations platform turning messy vendor data into launch-ready products through enrichment and matching (YC S24).
AI compliance co-pilot helping regulated financial firms ingest regulation and launch products faster (YC W25).
Builds networks of AI personas grounded in real human behaviour to simulate target-audience and stakeholder reactions (YC W25).
AI investment analyst automating financial modelling, research and data analysis for hedge funds and investors (YC W25).
Builds a foundation model for computational law that resolves regulatory questions via auditable legal-authority logic (YC W25).
Trainable AI agents that continuously learn an organisation's knowledge and ship data and AI programmes (YC X25).
Context-aware orchestration platform routing repetitive workflow tasks between humans and AI agents (YC S25).
Team of AI agents running qualitative consumer research, moderating and analysing video interviews for brands (YC S25).
Open-source graph-vector database giving AI agents low-latency memory and relationship-aware retrieval for RAG (YC X25).
Case intelligence platform for litigation that organises documents and answers questions with citations across pleadings (YC X25).
AI co-worker automating data extraction, tax research and review across tax, audit and accounting workflows (YC X25).
Vertical AI agents plus human callers that book qualified B2B sales meetings into traditional industries (YC X25).
API for agentic multi-document processing giving risk teams validated, source-traced data and AI oversight (YC X25).
Open-source agents that build, evaluate and deploy production-grade predictive ML models from a prompt (YC X25).
AI-powered code review platform that learns your codebase, flags bugs and helps teams merge pull requests faster (YC X25).
Platform to discover and build custom AI chatbots, plus no-code AI web apps without managing a backend (YC X25).
Open-source, performant experiment tracking for ML training, a Weights & Biases alternative with API compatibility (YC X25).
AI property manager automating maintenance triage, contractor scheduling and tenant communication for landlords (YC F25).
Computer-use AI agents automating reconciliation, billing and month-end close inside existing ERP and banking systems (YC F25).
Unified mid-market AI agent platform letting companies build and deploy custom agents for sales, support and operations (YC F25).
AI-powered operating system for restaurants unifying payments, point of sale and finance and operations agents (YC F25).
AI-native order-to-cash service whose agents run collections, reconciliation and portal uploads end to end (YC S26).
AI operating system for wholesale distributors, deploying self-improving agents for inventory planning, support and order entry (YC S26).
AI agents that do the admin around a council planning application — pulling the case file, researching local policy, drafting the first-pass officer report — leaving the decision with the planning officer. Live with Leeds City Council; £2.8m pre-seed led by CapitalT.
Axle Energy's software platform turns home EV chargers, batteries and heat pumps into a coordinated virtual power plant that trades flexibility into electricity markets.
Capsa AI provides an agentic AI platform that indexes a private capital firm's internal knowledge to automate deal sourcing, due diligence and portfolio monitoring.
Flok Health operates an AI physiotherapy clinic that autonomously assesses, treats and discharges patients and is deployed across NHS regions.
01Health provides a technology platform that combines AI tooling, clinical protocols and remote specialist oversight so local clinics can deliver specialist treatments like orthodontics and dental sleep medicine.
Gigaton builds self-learning AI control software that replaces legacy control systems in energy-intensive plants such as cement, steel, glass and chemicals to optimize production and cut emissions.
AI-powered supply-chain intelligence platform that builds a live digital twin of food products to track carbon, cost, and risk from farm to fork.
AI-native research platform that automates financial analysis and workflows for investment banking and asset management teams with source-cited AI agents.
Agentic certification platform that uses AI agents to verify carbon-removal and industrial claims, with human experts making final decisions.
Develops Pi, an AI software platform that analyses prostate MRI scans to help clinicians detect clinically significant cancer earlier.
AI tutor delivering personalised, Socratic 1-to-1 sessions aligned to UK exam boards (GCSE and A-level), deployed inside schools with teacher oversight.
Real-time AI sales coaching and deal intelligence that surfaces guidance from your CRM and playbooks live during enterprise sales calls.
Observability and continuous-evaluation infrastructure for tracing, testing and iteratively improving AI agents in production.
AI receptionist and business-memory phone system that answers calls, quotes prices and books jobs for trades and service businesses.
Open-source MLOps consultancy building bespoke machine-learning infrastructure for teams that want to avoid proprietary vendor lock-in.
All-in-one community operating system with an AI copilot for running events, selling memberships and monetising a community.
Subscription AI automation agents running on UK-sovereign infrastructure for enterprises, government and defence with data-residency compliance.
AI transformation and automation consultancy helping UK businesses adopt AI across their operations.
London XR startup building a cloud pipeline for production-ready volumetric video using 4D Gaussian Splatting for VR, AR and VFX.
UK-sovereign defence startup fusing drones, satellites, sensors and legacy kit into one platform for the MoD and allies; reportedly seeking around $200m pre-launch.
Vienna voice-AI firm building out a London office; AI phone agents that answer and place business calls in real time.
New York spend-management fintech standing up a London team; AI agents that automate corporate cards, expenses and accounts payable.
Israeli CX software firm with City and Southampton offices; its CXone Mpower platform runs agentic AI agents for contact centres.
AI talent agent for engineers: matches candidates to roles, coaches them through the process, and charges employers a recruiter-style fee on hire.
Founded by two Cambridge neuroscience PhDs; systems software that breaks an AI workload into tasks and routes each to the model and chip best suited to it, so heterogeneous silicon can stand in for banks of identical GPUs. First equity investment from the UK's Sovereign AI Fund.
Swindon online course provider (Global Education Explore Ltd); CPD- and QLS-certified training across IT and professional skills, including ChatGPT prompt engineering and data analysis.
Inference silicon that puts compute and memory on the same die, skipping the DRAM bottleneck; claims LLMs run far faster at a fraction of the running cost. London HQ plus a Bristol hardware engineering site, with first datacentre chips due 2027.
San Mateo inference platform for open models, serving 40tn+ tokens a day; valued at $17.5bn in July 2026 and now standing up an EMEA team in London.
Founded by ex-GCHQ and Darktrace leaders; turns scattered enterprise data into a knowledge graph that security teams and AI agents can reason over, kept inside the customer's own infrastructure. Profitable and bootstrapped for nine years before raising outside capital.
AI tutor for GCSE, A-level and IB exam prep, built by two former NHS doctors who couldn't afford tutoring themselves; marks practice answers and talks through where the marks went. 400,000+ UK users since launching in early 2025.
University of Edinburgh spin-out building single-photon (SPAD) image sensors with compute on the chip, for machine vision, physical AI and medical imaging; its founding professor designed the first SPAD sensor on silicon CMOS.
Imperial spin-out making metre-scale wind- and solar-powered autonomous vessels that sail for months gathering ocean sensor data; flown in swarms for the Royal and US Navies, NOAA and the Met Office.
Climate risk platform (formerly Balkerne) pairing predictive modelling with AI to forecast flooding, extreme heat and water stress against physical sites; its work with Sainsbury's booked over £3m of flood savings in year one.
University of Essex spin-out building autonomous fruit- and vegetable-picking robots — embedded AI, machine vision and manipulator arms — sold as robotics-as-a-service against farm labour shortages.
Grows synthetic diamond films from captured CO2 straight onto fabricated GaN chips, pulling heat off the power semiconductors that feed AI datacentres. Developed with University of Bristol researchers.
Describe an app in the browser and its agent writes, runs and deploys it; 50m+ registered users. Raised $400m at a $9bn valuation in March 2026, then opened its first office outside the US in King's Cross, reportedly targeting 100 people there by early 2027.
Adapts frontier models into forecasters for messy questions — geopolitics, policy, markets — rather than the clean-dataset kind. Beat every human entrant in the Summer 2026 Metaculus Cup. Founded by a former DeepMind research scientist; $25m seed led by Radical Ventures with Microsoft's M12.
Multi-agent 'Mages' that live inside a manufacturer's systems and work procurement end to end — supplier choice, negotiation, orders, invoices — talking to colleagues over Teams and email. Founded by a McKinsey alum and an OpenAI alum; $18m Series A led by Felicis.
London company selling into US healthcare: a knowledge graph turning insurers' medical coverage policies into programmable data, 500,000+ procedure codes deep and updated daily, so a coverage check can happen at the point of care. $100m commitment led by Thoreau.
Reads contracts, emails, invoices and project data for the early signals that a commercial relationship is heading for a dispute — a fifth of contracts end in one. Founded by a former RAF commercial lead; $10.4m from Cherry, Octopus, LocalGlobe and Auxxo.
Pulls a member's pensions, ISAs and savings into one place under FCA account-information permissions, with an assistant called Charlie for the context a private banker would otherwise give. £2.75m pre-seed led by Daphni.
Helps people run their own employment tribunal, small claims, scam-refund and renters' rights cases without a solicitor or a no-win-no-fee cut. It keeps one case record of facts, dates, evidence and deadlines and drafts each track's documents from it, for a flat £49–£399. Founded in 2026 by Paul Keene, who built it after going through a claim first-hand.
Training-data platform for teams building vision and physical-AI models — labelling, curation and evaluation over images, video and sensor data. Founded by two Imperial graduates; used by 200+ AI teams including Philips and Synthesia. $60m Series C led by Wellington.
A vetted, fairly-paid participant pool that AI labs and researchers use to gather human feedback and stress-test models on representative samples. Customers include Google, Oxford and the European Commission. £25m Series A co-led by Partech and Oxford Science Enterprises.
Generative design tool built on its own image model, with positioning control so teams can place a logo or product exactly where it belongs rather than working around the model. 4m+ users; $30m Series B led by Accel.
Watches how work actually gets done on employees' desktops and turns it into process maps and automation candidates — increasingly as the training signal for agents meant to do that work. $26.2m Series B led by Paladin Capital.
Oxford spin-out whose e-Stroke imaging software reads brain scans to flag biomarkers and guide treatment decisions in the minutes that matter; now extending the approach beyond stroke to lung fibrosis. £18.8m Series C.
Lee Cronin's Glasgow spin-out digitising chemistry itself: a 'chemputer' that takes a molecule's code and robotically synthesises it, with AI choosing the route. Its Chemifarm facility holds what it calls the largest curated library of validated reactions. $50m+ Series B.
Workforce platform for frontline operators in hospitality, care and retail — forecasting, scheduling, payroll and compliance with an AI assistant over the top. $45m Series B led by N47, $100m+ total.
Algorithmic underwriting for the Lloyd's specialty market: contracts and risks structured so they can be priced and placed by machine rather than by email and spreadsheet. Its AgLabs arm is building agent-to-agent market infrastructure. $45m Series B.
Oxford plant-sciences spin-out hunting new herbicide modes of action, a problem where almost nothing new has reached market in 30 years; its GALAXY platform screens 25,000 compounds a month on living plants with ML narrowing the field. £22.2m Series C.
Benchmarks and forecasts for grid-scale battery storage — the FCA-regulated numbers investors and lenders use to value projects — now with an AI analyst answering questions over its research library and datasets.
Alternative-data house running ML over receipts, card transactions and web signals to estimate daily revenue and KPIs for 250+ listed companies, with the emphasis on explaining why a number moved rather than just printing it.
AI-native benefits intelligence for multinationals, surfacing waste and governance gaps across benefits programmes run in dozens of countries at once. Co-created with Pfizer, Comcast and BP; $30m Series A+ led by Notion Capital.
The messaging layer NHS primary care actually runs on, with 350,000+ users, now adding Scribe to transcribe and code consultations straight into EMIS and SystmOne. A communications platform adding AI rather than an AI-native company.
Reads the open web, corporate records and sanctions lists, resolves the near-namesakes, and writes a fully sourced background report in minutes; customers automate around 90% of onboarding cases. $56m Series B led by Spectrum Equity, with the CEO moving to Boston as US revenue hits half the total.
Two AI agents on opposite sides of the hiring table: Jill works the role for the employer, Jack works the candidate's side, and when both agree it's a match the two are introduced with no application in between. 230,000+ people through it; $40m Series A led by Air Street 18 months from founding.
Agentic governance, risk and compliance: pulls risk and security evidence straight from source systems rather than document trails, and runs the checks with specialist agents. Founded by an eight-year Palantir executive; $7.3m seed co-led by Infinity Ventures and Frontline.
AI-native due diligence for renewable energy and data centre deals, taking parts of a transaction workflow that ran to weeks down to hours so buyers can screen far more opportunities. $4m pre-seed led by Episode 1, with Aurora Energy Research's co-founder among the backers.
Decision-making AI for enterprise — logistics, routing and scheduling — and, since BioNTech bought it for £562m in 2023, the group's AI arm for drug discovery and design. Founded in London in 2014; offices from Tunis and Lagos to Boston and San Francisco.
CAM Assist turns CNC programming — historically one of manufacturing's slowest manual steps — into an AI-generated machining strategy, and is now used in 1,000+ machine shops. Lockheed Martin is both a customer and, via LM Ventures, an investor in its $20m round.
Barcelona company with a London office; a control layer over the AI agents running inside large organisations, tracking what they touch and enforcing policy on it. Its $20m round was the largest cybersecurity seed raised in the EU.
The open-source framework for federated learning — training models on data that never leaves the device or organisation holding it. Founded by three researchers who met at Cambridge, including a Cambridge ML professor who ran Samsung's AI lab there; research labs at MIT, Stanford, Harvard, Berkeley and Oxford build on it. $20m Series A led by Felicis.
London-headquartered HR platform behind Bob, used by 5,400+ organisations; taking a $166m Salesforce-led investment at $3.2bn to turn its workforce data into the organisational-context layer enterprise AI agents run against.
Grows lab-cultured neurons as a substrate for training ML models, on the argument that a neuron colocates memory and compute where a GPU burns most of its energy shuttling between them. Solved the vascularisation limit that pinned cultures at ~1m neurons; building a 500m-neuron cluster. YC S26, $10m led by General Catalyst.
Sits between an organisation's AI policy and the agents, staff and workflows actually using AI — inventorying AI assets, assigning owners and risk profiles, and keeping an audit trail of what ran. $5.4m seed led by Fuel Ventures, with founding investor GALLOS.
An agentic control plane putting data pipelines and governed AI agents in one environment, so lean data teams can run both across an existing stack. Customers include Experian and the San Francisco Giants; $4.6m raised, seed led by Differential Ventures.
Makes mRNA inside living cells rather than in a test tube, with an NVIDIA-built computational engine designing and optimising the sequences — cutting optimisation time by over 90%. Partnered with Sartorius and Ginkgo Bioworks; Oxford and Bratislava.
Estate agency CRM used across UK agencies, now shipping a voice-led AI copilot, a marketplace of task-specific agents and a no-code agent builder, plus the consumer-facing Reapit Home. £20m+ from Accel-KKR against £40m a year of product spend.
Europe's first pure-play humanoid robotics unicorn, two years from founding: the wheeled HMND 01 robot running its own KinetIQ control stack, already trialled by Siemens picking containers on a factory floor. $152m Series A at $1.35bn, with Bosch and Schaeffler among the backers.
Trains and runs computer-vision models on the checkouts and cameras already sitting in shops, so product recognition and self-checkout loss prevention work without shipping footage to the cloud. Hardware-agnostic, with Zebra among its partners.
JUNO, an AI agent built for NHS administrators rather than clinicians: chasing test results, rebooking missed appointments and spotting patients stuck in a pathway before a target slips. Founded by Palantir's former healthcare lead across 40 NHS hospitals; $16m seed led by Atomico.
New York serverless cloud for AI workloads — custom model inference, fine-tuning, RL and agentic sandboxes — scaling from zero to hundreds of GPUs on containers defined in code. Raised $355m at a $4.65bn valuation in May 2026 and is now opening a London office.
One of very few new UK credit reference agencies licensed in a decade; scores creditworthiness from permissioned open-banking cashflow rather than credit history, with bias monitoring on the models. Founded by two friends who were both refused credit while working full time.
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