Series B Fintech companies in London

Companies modernising banking, payments, lending, and financial infrastructure. Filtered to Series B-stage companies headquartered in London.

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Ranked by current headcount across Series B Fintech companies in London. Refreshed daily.

1
Luno· London, England, United Kingdom
Luno is a crypto investment platform on a mission to spread the word about this once-in-a lifetime opportunity to create more freedom and financial growth across Africa, South East Asia, and Europe. We’re making crypto inclusive and accessible by being by your side at every step of the journey. We’re here for your questions, because for our financial system to be fair, everyone needs to understand it. So far, more than 15 million people have chosen to invest in crypto with Luno.All the crypto we store on your behalf is verified by independent auditors. We’re in it for the long term and we invite you on this journey with us.
- Series B
- 720 employees
- Founded 2013
2
Payhawk· London, England, United Kingdom
Payhawk is an AI-native spend management platform that orchestrates global money across Bills, Cards, Expenses, Travel, and Procurement for maximum control, automation and savings. It provides a global money account on top of your ERP combined with agents enforcing rules, policies and budgets on every payment while giving employees effortless spending experience. Headquartered in London with 9 offices across Europe and the US, Payhawk serves mid-market and enterprise companies in 32+ countries.
- Series B
- 466 employees
- Founded 2018
3
Talbot Underwriting· London, England, United Kingdom
Talbot Underwriting Ltd (“Talbot”) is an international insurer and reinsurer operating within the Lloyd’s market through Syndicates 1183 and 2019. We have been part of AIG since 2018 and our ambition is to be AIG’s centre of excellence at Lloyd’s. We have a diversified portfolio writing over 20 product lines across property, specialty, financial lines and treaty classes, and we're AIG's centre of excellence for Political Violence.Headquartered in London, we also have offices in New York and Singapore, and over 300 people working across these three locations.
- Series B
- 366 employees
- Founded 2001
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4
Wirex· London, England, United Kingdom
Wirex is a digital payment platform with a mission - to make crypto and traditional currencies equal and accessible to everyone. We’re making fintech simple. Our innovative mobile app and next-gen Wirex card lets you buy, store, exchange and spend a wide variety of conventional and digital currencies quickly and securely, with no hidden fees and zero fuss. Download the app now and discover a world where every purchase earns you CryptobackTM rewards - and using your cryptocurrency in real life is as easy as tapping your Wirex card.*Content on the page not intended for UK and NZ users!
- Series B
- 270 employees
- Founded 2014
5
3S Money· London, England, United Kingdom
3S Money is an international payments platform on a mission to create a fairer financial world for businesses everywhere. We combine innovative Fintech solutions and better service levels than traditional banks. Through a single online dashboard, clients can access global payment services and local banking networks wherever in the world they’re based. Our ‘No Chatbot' policy means we offer real human customer support across all aspects of our cross-border payment and FX risk management services. With the freedom to send, receive, and exchange money in 190+ countries and 65+ currencies, the opportunities for global businesses are limitless.–––3S Money and 3s.money are trading names of 3S Money Club Limited. 3S Money Club Limited is authorised by the Financial Conduct Authority under the Electronic Money Regulations 2011 for issuing of electronic money and the provision of payment services with FCA registration number 900918. 3S Money Club Limited is registered in England and Wales, Company Number 8574246, with its registered office address at 41 Luke St, London EC2A 4DP, United Kingdom. 3S Money Club Limited is registered with The United Kingdom Information Commissioner's Office with ICO registration number ZA495485.
- Series B
- 256 employees
- Founded 2018

6
GoHenry· London, England, United Kingdom
GoHenry is the money app giving 6-18-year olds a head start in life as they learn to earn, save, spend and invest - all with parental oversight. Having pioneered a new category in financial education when it launched in 2012, over 2.2 million kids have now learnt money skills with GoHenry.With the ultimate goal to make every kid smart with money, GoHenry believes the best way to learn is to get hands-on experience with money. Its parent and child apps help kids to Learn (via in-app, bite-sized money lessons, Money Missions); Earn (via regular chores, one-off tasks and giftlinks); Spend (responsibly via its prepaid debit card and real-time notifications); Save (via savings goals and interest on savings); Give (via regular micro-donations to the NSPCC); and Invest (via GoHenry’s Junior ISA).As a mission-led business, GoHenry is leading the push for financial education to be made compulsory in all schools across the UK from primary age. Follow GoHenry’s journey on LinkedIn, Instagram, and TikTok (@gohenry).
- Series B
- 223 employees
- Founded 2012
7
Aspora· London, England, United Kingdom
At Aspora, we're building financial bridges that connect the global diaspora - starting with India, the Philippines and beyond - to home.Trusted by 1 Million+ users worldwide for seamless money transfers home at Google rates.No hidden fees, no surprises - just transparent financial services designed for global citizens living away from home.
- Series B
- 219 employees
- Founded 2022
8
ESG Book· Camden Town, England, United Kingdom
ESG Book is a global leader in sustainability data and technology. Launched in 2018, the company offers a range of ESG and climate solutions that are used by many of the world’s leading investors and companies. Covering over 50,000 companies, ESG Book’s product offering includes ESG raw data, company-level and portfolio-level scores and ratings, analytics tools, and a SaaS data management and disclosure platform. ESG Book’s solutions cover the full spectrum of sustainable investing including ESG, climate, net-zero, regulatory, and impact products. ESG Book enables clients to access over 135,000 corporate disclosures, with solutions delivered through API technology for seamless integration. ESG Book’s platform makes sustainability data more widely available and comparable for market stakeholders, enabling companies to be custodians of their own data, providing framework neutral ESG information in real-time, and promoting transparency.Through our SaaS data management and corporate disclosure platform, ESG Book enables clients to assess over 50,000 corporate disclosures, with solutions delivered through the API technology for seamless integration. ESG Book’s platform makes sustainability data more widely available and comparable for market stakeholders, enabling companies to be custodians of their own data, providing framework-neutral ESG information in real-time, and promoting transparency.
- Series B
- 199 employees
- Founded 2017
9
Resistant AI - Fraud Detection· London, England, United Kingdom
Verify if your documents are real or fraudulent with AI. Resistant AI is the industry-leading document fraud detection system with more than 170M documents analyzed for fraud.Detect fraud in all types of documents:• Bank statements• Pay stubs• IDs• Utility bills• Tax forms• Etc.In all formats (PDFs, images). In all languages.Manually, with a simple drag and drop. Or automatically, using our API.And see if documents are fake, modified and fraudulent, in less than 20 seconds.Detect document fraud in: • Digital lending / Loan underwriting• Customer onboarding (KYC)• Merchant onboarding (KYB)• Tenant screening• Pre employment background checks• Insurance claimsAnd achieve: • 90% less manual reviews• 60% faster fraud checks• 80% of documents approved instantly• 99% accuracy in document verdicts170M+ docs analyzed. 8K+ fraud & compliance analysts using Resistant AI to detect fraud. 500+ detectors. 100+ patents. Digital Crime Fighter of the Year. Twice Winner of ACAMS'PwC Hackathon. Backed by GV, Index Ventures, Credo Ventures, Seedcamp.
- Series B
- 161 employees
- Founded 2019
10
Monument· London, England, United Kingdom
At Monument, we’re changing banking for the mass affluent with a new approach- exceptional client service, straightforward savings, innovative wealth-tracking tools and curated lifestyle experiences that help you build and enjoy your wealth. Based in London, we’ve quickly grown into one of the fastest-growing fintechs in the UK & Ireland (Sifted 100 2025) and are trusted with over £6 billion in savings. Our savings products include Easy Access, Limited Access, Fixed Term Deposits, Notice Accounts and an Easy Access Cash ISA.
- Series B
- 143 employees
- Founded 2017

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Find engineers at Series B Fintech companies in London

Searching for “engineers at top Series B Fintech companies in London” surfaces this slice of the market. The list above ranks Fintech companies headquartered in London whose latest disclosed round is Series B, by current headcount, drawn from public LinkedIn and Crunchbase records. With 47 matching companies in Refolk’s index, this is a tight read on where the Fintech talent in London is heating up.

Three filters at once narrows the field hard. The companies that survive all three - Series B, Fintech, in London - are usually the most targeted recruiting pool a hiring manager can ask for. Senior engineers, founding designers, and product leads here are about to become Fintech’s next operators and angel investors.

Refolk converts this list into a live search. Ask for “senior engineers at Series B Fintech companies in London hiring” or “founders of Series B Fintech companies in London who left in the last year” and Refolk returns a ranked shortlist with the evidence behind each match.

How this list is built

Refolk pulled Fintech companies headquartered in London whose latest disclosed funding round is Series B from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 11:09:43 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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The underlying index updates continuously and this page re-renders at least daily. Last refreshed: Wed, 05 Aug 2026 11:09:43 GMT.

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