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 assistant for property due diligence that extracts key insights from real estate legal documents.
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 workspace for local-government planning officers that validates applications, checks policy and drafts reports.
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.
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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