Top SaaS companies in London

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

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IndustrySaaS
HQLondon
Matches5,211

Built from a search like: “Top SaaS companies in London”

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

1
Nothing· London, England, United Kingdom
Nothing exists to make tech feel exciting again.We’re building a different kind of company, one that puts design, emotion, and human creativity at the heart of everything we do. From the way our products look to how they sound, feel, and function, we care about the details that make technology not just useful, but inspiring.This is a place for the curious. The creators. The ones who ask why not and mean it. If you're drawn to bold ideas, fast moves, and work that actually makes you feel something, you’ll fit right in.We're not here to follow the rules. We're here to make better ones.Founded in London in 2020, Nothing is a design-led tech company building an alternative to the industry giants. Our products, from award-winning smartphones to expressive audio and wearables, blend iconic design with intuitive engineering to put people and creativity back at the centre of consumer tech.Backed by GV (Google Ventures), EQT Ventures, C Ventures, and influential investors like Tony Fadell (iPod), Casey Neistat, and Kevin Lin (Twitch), we’ve grown from startup to global challenger in just a few years.
- undisclosed
- 30.4k employees
- Founded 2020
2
Edutech· Greater London, England, United Kingdom
// eduTech is currently operating in a private development
- 25k employees
3
Pharma Solutions Hub· London, England, United Kingdom
Pharma Solutions Hub partners with pharmaceutical and biotech startups to accelerate product development, secure sensitive data, and modernise R&D operations. We deliver custom software, AI pipelines, cloud engineering, and cybersecurity built for regulated environments. Our team combines software engineering, data science, and compliance expertise to create reproducible, auditable systems that speed discovery, protect IP, and keep clinical data safe. Follow this page for practical guides, technical playbooks, case studies, and security checklists that help founders, CTOs, and technical teams move faster and safer.
- 15.1k employees
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4
local· Greater London, England, United Kingdom
!
- 14k employees
- Founded 2017
5
AI· London, England, United Kingdom
Welcome to AI - Your Go-To Hub for Everything Artificial Intelligence.AI is moving fast and staying ahead shouldn’t be hard.This page is built for anyone who wants to understand, discover, and leverage AI without the noise. We curate the most important AI news, tools, trends, and real-world use cases shaping the future of technology and business.🔍 What you’ll find here:- Breaking AI news & industry updates- Deep dives into generative AI, automation, and emerging trends- Curated AI tools & platforms worth your time- Practical insights for business, productivity, and innovationWhether you’re a founder, developer, creator, marketer, or AI enthusiast, this page is here to help you stay informed and ahead of the curve.👉 Follow AI and join a growing global community exploring how artificial intelligence is transforming the world.Let’s build the future — intelligently. 🤖✨
- 13.3k employees

6
Deliveroo· London, England, United Kingdom
Deliveroo is an award-winning delivery service founded in 2013 by William Shu and Greg Orlowski. Deliveroo works with approximately 176,000 best-loved restaurants and grocery partners, as well as around 150,000 riders to provide the best food delivery experience in the world. Deliveroo is headquartered in London, with offices around the globe. Deliveroo operates across 9 markets, including Belgium, France, Italy, Ireland, Qatar, Singapore, United Arab Emirates, Kuwait and the United Kingdom.
- Post-IPO equity
- 11.6k employees
- Founded 2013
7
Clarivate· London, England, United Kingdom
Clarivate is a leading global provider of transformative intelligence. We offer enriched data, insights & analytics, workflow solutions and expert services in the areas of Academia & Government, Intellectual Property and Life Sciences & Healthcare. For more information, please visit clarivate.com.
- Post-IPO equity
- 10.2k employees
8
Women Tech Community· Greater London, England, United Kingdom
Women Tech is a global community of women in tech who are enthusiastic about supporting each other and advancing women's representation in the tech industry. We provide a platform where members can connect, learn, and grow.Our VisionWe envision a world where women are equally represented in the tech industry and can reach their full potential. We believe that tech is for everyone, and we are committed to collaborating with the community to make it happen.Our MissionOur mission is to empower women in tech to achieve their goals. We do this by providing a variety of resources, including:- A forum where members can ask questions and get help from each other.- A blog where members can stay up to date on the latest news and trends in the tech industry.- A library of resources, including articles, tutorials, and podcasts- A mentorship program that connects members with experienced professionalsHow to Get InvolvedThere are many ways to get involved in the Women Tech Community. You can:. Join our forum and ask questions or offer help to other members.. Read our blog to stay up to date on the latest news and trends in the tech industry.. Check out our library of resources to learn more about tech. . Attend our events and meetups to meet other women in tech and learn from them.We are always looking for new ways to get involved. If you have an idea for how you can help, please contact us.Thank you for your interest in the Women Tech Community. We look forward to collaborating with you to achieve our vision of a world where women are equally represented in the tech industry and can reach their full potential!
- 10k employees
9
Informa· London, England, United Kingdom
Informa champions specialists working in academic and business-to-business markets, connecting people with knowledge to help them learn more, know more and do more. We’re a leading international events, digital services and academic knowledge business, headquartered in the UK and a member of the UK’s FTSE 100 group of public companies. We’re also home to a fantastic, inclusive community of over 14,000 colleagues across 30 countries, and a place where our colleagues have the freedom and flexibility to bring ideas to life, do work that makes a real impact and discover opportunities to grow.Our businesses include Informa Markets, Informa TechTarget, Informa Connect, Informa Festivals and Taylor & Francis, but if you work in one of the specialist markets we serve, you might also know us through our brands. In Pharma, Medical and Biotech, that includes WHX Dubai, CPHI and EBD; in Tech, Enterprise Connect, AI Summit, Black Hat and GDC; in Natural Products, New Hope Network, Vitafoods and Natural Products Expo; in Beauty & Aesthetics, China Beauty Expo and Premier Beauty; in Finance, SuperReturn International, Money20/20, Finovate and IGM; in Research and Advanced Learning, Routledge and F1000; and many more brands in more markets too.
- Post-IPO equity
- 9.5k employees
- Founded 1998
10
Game Developer· London, England, United Kingdom
The game developer is a global community of people who are passionate about making games. It includes people of all skill levels, from beginners to experienced professionals. The community is a great resource for game developers to learn, share ideas, and get help from others.
- 8.6k employees
- Founded 2015

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Find engineers at SaaS companies in London

London has long been a hub for SaaS, and the list above ranks the largest SaaS companies headquartered there by current headcount, drawn from public LinkedIn and Crunchbase records. With 5,211 matching companies in Refolk’s index, this is a good map of where the SaaS talent in London lives - useful whether you’re recruiting, partnering, or sizing a market.

The biggest SaaS companies in London tend to be the gravitational centres for specialised talent - senior engineers, ML researchers, applied scientists, designers - while the smaller ones compete on speed, equity, and proximity to founders.

Refolk converts this list into a live search. Ask for “SaaS engineers in London hiring senior staff” or “founders of SaaS companies in London who left in the last 12 months” and Refolk returns a ranked shortlist with the evidence that earned each person a spot.

How this list is built

Refolk pulled SaaS companies headquartered in London from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 10 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 22:40:30 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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