All Rankings

Top 100 AI Startups in London 2026

The most-funded artificial intelligence and machine learning startups headquartered in London, ranked by total capital raised.

Known total funding for 100 of 100 ranked companies: $27.4B.

Showing top 100 matching companies · Ranked by total funding raised

Use company data through the API.
Example request
curl "https://indexed.vc/api/v1/companies?industries=Artificial+Intelligence,Generative+AI,Machine+Learning&countries=United+Kingdom&cities=London&operatingStatus=active&sort=total_funding_raised&order=desc&limit=100" -H "X-API-Key: YOUR_API_KEY"

The API has no company type filter, so public companies can appear; this list counts private companies only.

The API cannot leave out companies whose latest round is a grant, private equity or debt financing; this list does.

Data from Indexed.vcUpdated

Methodology: up to 100 active companies matching this list's filters are ordered by disclosed total funding in USD. Companies whose latest round is one of: Grant, Private Equity, Debt Financing are excluded. Totals include recorded grants and other qualifying funding, not just equity. Open a company profile for its funding summary and available detail. How this data is built.

1
Nscale

Nscale builds AI infrastructure, systems and solutions that let practitioners, enterprises and go...

London, United Kingdom201–500Artificial Intelligence, Infrastructure
ConvertibleTotal funding$7.1BSep 2026
2
Wayve

Wayve is building a general-purpose driving intelligence that learns from data and scales across ...

London, United Kingdom501–1000Artificial Intelligence, Autonomous Vehicles
Extension RoundTotal funding$3.7BApr 2026
3
Isomorphic Labs

AI-first drug discovery company using AlphaFold-derived models to design therapeutics and acceler...

London, United Kingdom201–500Artificial Intelligence, Biotech
Series BTotal funding$2.6BMay 2026
4
Ineffable

Ineffable creates superlearners that discover knowledge and skills from experience using powerful...

London, United Kingdom1–10Artificial Intelligence
SeedTotal funding$1.1BApr 2026
5
Kraken Technologies

AI-powered operating system for energy, water, and telecom utilities that provides customer manag...

London, United Kingdom1001–5000Energy, Artificial Intelligence
Growth EquityTotal funding$1.0BDec 2025
6
Multiver

Professional apprenticeship platform providing an alternative to college by connecting individual...

London, United Kingdom501–1000Artificial Intelligence, EdTech
Growth EquityTotal funding$594.0MMay 2026
7
Quantexa

Decision Intelligence platform that connects fragmented data to reveal real-world relationships f...

London, United Kingdom501–1000Analytics, Artificial Intelligence
Series FTotal funding$545.0MMar 2025
8
Primer

Primer provides unified payment infrastructure that lets merchants connect providers, orchestrate...

London, United Kingdom51–200Fintech, Developer Tools
Series CTotal funding$537.4MMay 2026
9
O
Olix

UK AI-chip startup building optical compute chips to rival GPU incumbents.

London, United KingdomArtificial Intelligence, Semiconductors
Series BTotal funding$532.0MAug 2026
10
PhysicsX

PhysicsX develops AI-native engineering software that helps industrial organizations accelerate s...

London, United Kingdom51–200Artificial Intelligence, Automotive
Series CTotal funding$484.0MJun 2026
11
Synthesia

Synthesia is an enterprise AI video communications platform that empowers users to make video con...

London, United Kingdom201–500Artificial Intelligence, Media
Series ETotal funding$470.0MJan 2026
12
Fractile

Fractile builds processors that physically interleave memory and compute to deliver low-latency, ...

London, United Kingdom51–200Artificial Intelligence, Semiconductors
Series BTotal funding$464.2MMay 2026
13
Signal AI

Signal AI is a risk and reputation intelligence company that uses proprietary AI to analyze 2 bil...

London, United Kingdom201–500Artificial Intelligence, SaaS
Series BTotal funding$348.8MFeb 2026
14
Behavox

Behavox is an AI company that helps organizations safeguard and enhance their businesses through ...

London, United Kingdom201–500Artificial Intelligence
Growth EquityTotal funding$337.0MJun 2026
15
Palta

Digital health and wellness company building a portfolio of preventive health apps including Flo ...

London, United Kingdom501–1000Healthcare, Digital Health
Series CTotal funding$314.0MJul 2024
16
Stability AI

Open-source generative AI company building multimodal image, audio, video, and 3D models for ente...

London, United Kingdom51–200Artificial Intelligence
Series BTotal funding$257.0MAug 2026
17
9fin

AI-native debt market intelligence platform for credit teams, providing real-time data, analytics...

London, United Kingdom201–500Artificial Intelligence, Data & Analytics
Series CTotal funding$251.0MMar 2026
18
Basecamp Research

Builds evolutionary biological datasets and foundation AI models to design proteins and therapeut...

London, United Kingdom11–50Artificial Intelligence, Biotech
Series CTotal funding$220.0MSep 2026
19
Cleo

Cleo gives people personalized financial guidance through a conversational AI assistant that help...

London, United Kingdom201–500Artificial Intelligence, Fintech
Series CTotal funding$218.4MJun 2022
20
Beamery

Talent lifecycle management platform that uses AI and data insights to help enterprises attract, ...

London, United Kingdom201–500Artificial Intelligence, HR Tech
Series DTotal funding$218.0MDec 2022
21
BenevolentAI

AI-enabled drug discovery company using machine learning and knowledge graphs to identify novel d...

London, United Kingdom201–500Drug Discovery, Artificial Intelligence
Series DTotal funding$217.8MJan 2020
22
Granola

AI-powered notepad that transcribes meetings, enhances notes, and provides searchable, shareable ...

London, United Kingdom11–50Artificial Intelligence, Productivity
Series CTotal funding$212.0MMar 2026
23
PolyAI

PolyAI builds enterprise-grade voice AI agents that handle real customer conversations at scale, ...

London, United Kingdom201–500Artificial Intelligence, SaaS
Series DTotal funding$202.0MOct 2025
24
SEON

SEON provides businesses with real-time fraud and AML risk decisions using first-party data signa...

London, United Kingdom201–500Artificial Intelligence, Cybersecurity
Series CTotal funding$188.9MSep 2025
25
Leah

Leah, formerly ContractPodAi, empowers enterprises to build, orchestrate, and govern intelligent ...

London, United Kingdom201–500Artificial Intelligence, SaaS
Series CTotal funding$187.5MSep 2021