Series B SaaS companies in London

Software-as-a-service vendors selling subscription cloud software to other businesses. Filtered to Series B-stage companies headquartered in London.

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

1
WGSN· London, England, United Kingdom
WGSN is the global authority on consumer trend forecasting. We help brands around the world create the right products at the right time for tomorrow’s consumer.WGSN's trusted consumer and design forecasts power outstanding product design, enabling our customers to create a better future. Our services cover consumer insights, beauty, consumer tech, fashion, interiors, lifestyle, food and drink forecasting, data analytics and expert advisory.
- Series B
- 978 employees
- Founded 1998
2
GWI· London, England, United Kingdom
The next evolution of AI is humanized data. And who’s got that data? We have.For well over a decade GWI has provided real-world, human-sourced data to power business decisions in some of the world’s biggest companies. Today we’re using that same human data to revolutionize tomorrow’s AI systems. It’s a future where real data, gathered from real people, creates real understanding. It means GWI will be at the forefront of shaping how the next generation of AI models understand and interact with the world.Given the future of AI, the size of this opportunity is simply staggering. If you’d like to be part of it, we’re on the lookout for out-of-the-box thinkers to help us do more great things.
- Series B
- 748 employees
- Founded 2009
3
Tripledot Studios· London, England, United Kingdom
Recently named "The fastest growing company in Europe" by the Financial Times, Tripledot is one of the largest mobile gaming companies in the world, entertaining over hundreds of millions of people around the world. Forged by seasoned industry veterans from King, Facebook and Product Madness, our goal is to create the highest quality games for everyone to enjoy. With the belief that amazing games are created by amazing teams, Tripledot brings the best-of-the-best together. Currently our team consists of 500 people in offices in London, Warsaw, Barcelona and Jakarta.
- Series B
- 592 employees
- Founded 2017
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4
ZOE· London, England, United Kingdom
ZOE combines scientific research with cutting-edge AI to improve the health of millions. We are a remote-first, well-funded scale-up created by the world’s top scientists and backed by founders, investors, and entrepreneurs who have built multi-billion dollar tech companies. Our personalised nutrition program radically reimagines a fundamental human need – eating well for your body. Currently available in the US and the UK, ZOE is already helping tens of thousands of its members adopt a healthier lifestyle.Our collective work and expertise in biology, engineering, data science, and nutrition science have led to multiple breakthrough papers in leading scientific journals such as Nature Medicine, Science, The Lancet, and more.We value inclusivity, transparency, ownership, open-mindedness and diversity. We are passionate about delivering great results and learning in the open. We want our teams to have the freedom to make long-term, high-impact decisions, and the well-being of our teammates and the people around us is a top priority.
- Series B
- 412 employees
- Founded 2017
5
Fuse Energy· London, England, United Kingdom
We are building a full stack energy company to lower cost of energy & accelerate energy abundance. We are hiring globally. We've raised $210m from top tier investors to fix Energy.We never settle - second best is not an option.
- Series B
- 393 employees
- Founded 2022

6
Lavanda· London, England, United Kingdom
Our transformative property management software and solutions help support many of the world’s leading real estate companies, helping ensure their future success by providing innovative solutions that maximise ROI and inform good decision-making.Our PMS platform and solutions help organisations turn insights into opportunities enabling better decision-making and results via a highly evolved, powerful and compliant software platform that channels business intelligence to provide insights and resilience for organisations.
- Series B
- 349 employees
- Founded 2014
7
IMMO· London, England, United Kingdom
IMMO is Europe’s first technology-led residential real estate platform, designed to create quality portfolios of existing single-family rental (SFR) housing at speed and scale.We’ve built a unique end-to-end solution, providing institutional partners with sourcing, acquisition, portfolio management, lettings and property management, enabling them to drive performance and maximise returns.Founded in 2017, we have assembled an experienced team of 130+ which includes successful entrepreneurs and industry leaders with expertise from McKinsey, Goldman Sachs, Blackstone, Uber, HSBC, Amazon, Procter & Gamble, BlackRock, Morgan Stanley, Google and many more.We have an established presence in the UK, Germany, Spain and India and have been awarded “Tech Pioneer” by the World Economic Forum.
- Series B
- 324 employees
- Founded 2017
8
Wheely· Brentford, England, United Kingdom
Wheely is a Swiss-founded British luxury services company headquartered in London and operating in other major cities, including New York, Paris and Dubai. We are building a platform with user privacy at its core while scaling a five-star service to millions of journeys across multiple cities. Beyond transportation, customers can also trust our chauffeurs to take on highly personal tasks for them through our concierge service, available through the best-in-class Wheely app. We exist to help our customers reclaim their time. With our modern engineering and design, together with the industry’s highest standards of service, we unlock an unparalleled experience for our customers—connecting them to the places and people that matter. Our team combines passion, determination and expertise, from engineering and product design to marketing and operations.
- Series B
- 313 employees
- Founded 2010
9
Mimica· London, England, United Kingdom
Mimica shows enterprises where to streamline, standardize, and automate processes across the entire organization — with zero manual effort, and in as little as two weeks. We answer the most important questions in a business: How are our people spending their time? How do we make these processes more efficient? Where’s the best place to start improving or automating? Here’s how we do it: Mimica’s AI-powered task mining observes employee actions across the desktop and categorizes them into detailed process maps. Mimica’s process intelligence highlights inefficiencies, prioritizes improvements based on ROI, recommends the optimal technology for automation (RPA, intelligent document processing, GenAI), and provides a blueprint for building new automations.Mimica transforms how work gets done across the enterprise, so you can maximize workforce productivity, cut costs, and drive operational excellence. Get started at Mimica.ai
- Series B
- 284 employees
- Founded 2018
10
Unibuddy· London, England, United Kingdom
Experiences shared. Decisions made.Build communities, confidence, and empower life-changing decisions.We connect university student ambassadors and future students digitally around the world to make more informed decisions about higher education.Prospective students get information, reassurance and a greater shot at success.Student ambassadors create connections, gain confidence and get to pay it forward.And universities attract, engage and retain a diverse student population.Because shared experience is the most powerful tool for choosing the right path.
- Series B
- 277 employees
- Founded 2015

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Find engineers at Series B SaaS companies in London

Searching for “engineers at top Series B SaaS companies in London” surfaces this slice of the market. The list above ranks SaaS companies headquartered in London whose latest disclosed round is Series B, by current headcount, drawn from public LinkedIn and Crunchbase records. With 99 matching companies in Refolk’s index, this is a tight read on where the SaaS talent in London is heating up.

Three filters at once narrows the field hard. The companies that survive all three - Series B, SaaS, 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 SaaS’s next operators and angel investors.

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Refolk pulled SaaS 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 13:49:05 GMT

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