All Rankings

Top Seed-Stage Companies in the UK 2026

Private companies headquartered in the United Kingdom whose latest recorded round was seed or pre-seed, ranked by disclosed lifetime funding.

Known total funding for 100 of 100 ranked companies: $2.7B.

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?countries=United+Kingdom&operatingStatus=active&sort=total_funding_raised&order=desc&limit=100" -H "X-API-Key: YOUR_API_KEY"

The API has no funding stage filter, so this includes every stage, not only Seed or Pre-Seed.

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; 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 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
Ineffable

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

London, United Kingdom1–10Artificial Intelligence
SeedTotal funding$1.1BApr 2026
2
Callosum

AI workload orchestration platform

London, United Kingdom1–10Artificial Intelligence
SeedTotal funding$110.3MAug 2026
3
Orbital

Orbital brings real estate expertise and AI technology together to help legal and property teams ...

London, United Kingdom51–200Artificial Intelligence, Legal Tech
Pre-seedTotal funding$75.8MJun 2026
4
Ambar

Complex enterprise applications using AI at a fraction of the cost and faster delivery times

London, United Kingdom11–50Artificial Intelligence, Developer Tools
SeedTotal funding$63.5M
5
Out Fund

Outfund provides equity-free revenue-based financing from £10k to £500k for online businesses, wi...

London, United Kingdom51–200Fintech
SeedTotal funding$50.4MDec 2020
6
We Are Percent

Percent is the leading platform bringing private credit investing to accredited and institutional...

London, United KingdomFintech
SeedTotal funding$47.3MJul 2021
7
Laigo Bio

Laigo Bio develops SureTACs, bispecific antibodies that remove disease-causing cell-surface prote...

Utrecht, United Kingdom1–10Biotech, Healthcare
SeedTotal funding$37.6MMar 2026
8
Arrakis

Arrakis builds an AI operating system for industrial enterprises, combining a sovereign multi-mod...

London, United Kingdom11–50Artificial Intelligence, Manufacturing
SeedTotal funding$37.5MJul 2026
9
Infinitopes

Clinical-stage cancer vaccine biotech developing precision immunotherapies to prevent cancer recu...

Oxford, United Kingdom11–50Biotech
SeedTotal funding$35.1MJan 2025
10
Relation Therapeutics

Relation Therapeutics uses proprietary data and AI platforms to guide medicine development, with ...

London, United Kingdom11–50Artificial Intelligence, Biotech
SeedTotal funding$35.0MMar 2024
11
Unaric

Unaric turns customer data into Salesforce-native context, helping Agentforce and teams identify ...

London, United Kingdom51–200Artificial Intelligence, Fintech
SeedTotal funding$35.0MJun 2023
12
LogosAI

AI-native mathematical auto-formalization

London, United Kingdom1–10Artificial Intelligence, Developer Tools
SeedTotal funding$31.0MJan 2025
13
Architect

Frontier AI lab building AI models and systems to design and generate verified custom chips for m...

London, United Kingdom11–50Artificial Intelligence, Hardware
SeedTotal funding$24.0MJun 2026
14
Vsim

Multi-physics simulation platform for robotics, building accurate and scalable physics engines to...

Manchester, United KingdomArtificial Intelligence, Robotics
SeedTotal funding$21.5MSep 2024
15
Pixion Games

Mobile gaming company building real-time multiplayer games.

London, United Kingdom11–50Gaming, SaaS
SeedTotal funding$21.4MJan 2025
16
BetDEX

BetDEX builds on the blockchain and the Monaco Protocol to connect fans around the world in a sin...

London, United Kingdom11–50Crypto & Web3, Sports Tech
SeedTotal funding$21.0MNov 2021
17
REKKI

Provides AI-powered order processing and marketplace software for food and beverage wholesalers a...

London, United Kingdom11–50Artificial Intelligence, Marketplace
SeedTotal funding$20.0MJan 2019
18
Unlikely AI

Transformative AI technology making AI trustworthy

London, United Kingdom11–50Artificial Intelligence
SeedTotal funding$20.0MSep 2022
19
Sequence

Sequence unifies revenue operations in one automated platform, providing CPQ, billing, and revenu...

London, United Kingdom11–50Fintech
SeedTotal funding$19.0MSep 2022
20
Altruistiq

Climate intelligence platform helping companies measure, manage, and reduce carbon footprints wit...

London, United Kingdom51–200Climate Tech, SaaS
SeedTotal funding$18.0MJul 2022
21
Caribou

Caribou looks across transfer pricing design, accounting entries, VAT, permanent establishment, a...

London, United Kingdom1–10Fintech, Legal Tech
SeedTotal funding$17.5MDec 2025
22
Muse Finance

Helping SME's take back control, with simple transparent finance & cash flow forecasting

London, United Kingdom11–50Fintech
SeedTotal funding$17.2MOct 2021
23
Kennek

kennek is an all-in-one platform that lets lenders originate, manage, and service loans while mon...

London, United Kingdom11–50Fintech, SaaS
SeedTotal funding$17.0MOct 2023
24
Phoebe

Coral, previously named Phoebe, is a startup whose team is focused on building the data retrieval...

London, United Kingdom11–50Artificial Intelligence, Developer Tools
SeedTotal funding$17.0MAug 2025
25
Frontier Health

Frontier Health’s Juno automates repetitive, high-volume healthcare administration across existin...

London, United Kingdom1–10Artificial Intelligence, Healthcare
SeedTotal funding$16.6MJun 2026