London startup directory
Hand-picked startups, investors, and ecosystem operators in London, with a custom city illustration in europe-startup-guide.com brand colors.
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ScaleUp Institute
The ScaleUp Institute was co-founded in 2015 by Sherry Coutu CBE and Reid Hoffman, following Coutu's 2014 Scale-Up Report for the UK government. It is a private-sector-led, not-for-profit organisation in London that works with policymakers, corporates, finance institutions, and educators to close the UK's scale-up gap. The institute publishes annual research, runs programmes, and provides policy advocacy to help fast-growth businesses become global companies.
Scope
London-based AI workflow platform transforming industrial inspection for the testing, inspection, and certification (TIC) sector. AI agents help field inspectors capture data through voice, video, and structured workflows, unlocking 50% more inspector capacity. Raised €17.2M Series A led by Index Ventures.
Seedcamp
Seedcamp is a London-based pre-seed and seed fund founded in 2007, often described as Europe's seed fund, that backs founders building globally ambitious technology companies. Its portfolio includes some of Europe's best-known startups, such as Wise, Revolut and UiPath, and it provides founders with capital and access to an extensive expert network.
Semble
Clinical platform and EHR for outpatient and private healthcare providers, connecting scheduling, billing, telehealth and patient records in one system. Serves 1,700 customers including Nuffield Health; 10M+ UK patients have been seen by a clinician using it.
Sequoia Capital
Sequoia Capital is a global venture firm that led ElevenLabs' $500M Series D round announced in February 2026 at an $11B valuation, with partner Andrew Reed joining the board. Sequoia also backs Bolt as it scaled its multi-vertical mobility platform across Europe.
Sifted Summit 2026
The annual gathering for Europe's scaleup leaders, run by the FT-backed Sifted. Programming covers fundraising, AI adoption, and sustainability, with a strong investor presence and the Sifted 250 leaderboard — valuable for a growth-stage founder raising or scaling.
Signal AI
AI-powered external intelligence platform that ingests media, social, broadcast and regulatory data across 226 markets and 75+ languages to deliver enterprise risk, reputation and ESG insights. Founded in London, 2013.
Simon Beckerman
Founder of Depop, the social marketplace for secondhand fashion that became a cultural phenomenon with Gen Z before its acquisition by Etsy. A designer by background, he also co-founded PIG magazine.
Snyk
Snyk is a developer security platform founded in 2015 in London that helps software teams find and fix vulnerabilities in open-source dependencies, container images, infrastructure-as-code, and proprietary code. The company raised over $1 billion in funding and reached a peak valuation of $8.5 billion in 2021, becoming one of Europe's most valuable cybersecurity startups. Snyk integrates directly into developer workflows and CI/CD pipelines, positioning security as a developer-first concern. It serves over 1,500 enterprise customers including Google, Salesforce, and Atlassian.
Solve Intelligence
Solve Intelligence builds an AI platform for intellectual property and patent work, acting as a co-pilot for IP law. Its software helps teams collect ideas from inventors, draft patent applications, respond to office actions, handle continuations and divisionals, and coordinate global patent filings across technical domains. The company is a Y Combinator alumnus with operations in London and San Francisco, founded by Chris Parsonson (CEO), his brother Angus Parsonson (CTO), and Sanj Ahilan. In December 2025 it raised a $40 million Series B co-led by Visionaries and 20VC, bringing total funding to roughly $55 million.
Sona
Sona is a London-based workforce management platform built for frontline and deskless workers in industries such as hospitality and healthcare. Its integrated, AI-powered system combines scheduling, HR, payroll, compliance and business intelligence tools into a single people operating system. Founded in 2021 by Steffen Wulff Petersen, Oli Johnson and Ben Dixon, the company aims to serve the large global population of frontline workers. In April 2026 Sona raised a $45 million Series B led by N47, with participation from Felicis, Northzone, Gradient and Italian Founders Fund, taking total funding above $100 million.
Sonali De Rycker
Partner at Accel and one of Europe's most influential venture investors, leading the firm's London office. She has backed Spotify, Monzo, BeReal and KRY, and focuses on AI, consumer and fintech companies across Europe and Israel.
Space-Comm Expo Europe 2027
The UK's space-industry expo and conference at ExCeL London, connecting space companies, defence, and the broader supply chain. For spacetech and deeptech founders it is the main UK venue to meet agencies, primes, and investors active in the space economy.
Stability AI
Stability AI is a London-based artificial intelligence company founded in 2019 that develops open and openly licensed generative models across images, video, audio and 3D, best known for the Stable Diffusion text-to-image model. It positions itself around accessible, open generative AI for creators, developers and enterprises.
Starling Bank
Starling Bank is a London-based digital bank founded in 2014 by Anne Boden, offering personal, business and joint current accounts through a mobile app under a full UK banking licence. It was one of the first British neobanks to reach sustained profitability and also licenses its banking technology to other institutions through its Engine software subsidiary. It employs several thousand people and reports revenue of more than 880 million pounds.
Steffen Tjerrild
Co-founder and COO/CFO of Synthesia, the AI video-generation platform. He runs the company's operations and finance alongside CEO Victor Riparbelli as Synthesia became one of Europe's most valuable generative-AI companies.
Stephen Chandler
Managing Partner and co-founder of Notion Capital, the London B2B SaaS and fintech firm he started in 2009 with the MessageLabs team. He has backed European software leaders including GoCardless and Currencycloud and helped grow Notion to over $1bn AUM.
Steven Bartlett
British entrepreneur, investor and author. He founded social-media marketing firm Social Chain in 2014 and later co-founded Flightstory, a media and investment company. He hosts The Diary of a CEO, one of the world's most listened-to business podcasts, and is an investor on the BBC's Dragons' Den.
Stream
Stream, rebranded from Wagestream in September 2025, is an employer-partnered workplace finance platform. Through partner employers, frontline workers gain flexible early access to their earned wages, alongside budgeting and financial-planning tools, a savings account, affordable credit, and money coaching. In 2025 it expanded into workplace pensions via its acquisition of Zippen. The platform serves several million workers across more than 2,000 employers in the UK, Europe, and the US, with partners including Asda, Bupa, Greene King, and the NHS.
SumUp
SumUp is a leading European fintech providing mobile point-of-sale card readers and a suite of financial tools for small merchants. The company serves over 4 million businesses across 35+ countries, offering card acceptance, invoicing, business accounts, and online payment links. SumUp has become the go-to payments partner for micro and small businesses across Europe and beyond, competing with Square in the SMB payments space.
