IPO SaaS companies in London

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

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

Ranked by current headcount across IPO SaaS companies in London. Refreshed monthly.

1
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
2
Sapiens· London, England, United Kingdom
Sapiens is a global leader in intelligent insurance software solutions. With our robust platform, customer-driven partnerships, and rich ecosystem, insurers are empowered to future-proof their organizations with operational excellence in a rapidly changing marketplace. We help insurers harness the power of AI and advanced automation to support core solutions for property and casualty, workers’ compensation, and life insurance, including reinsurance, financial & compliance, data & analytics, digital, and decision management. Sapiens boasts a longtime global presence, serving over 600 customers in more than 30 countries with its innovative SaaS offerings. Recognized by industry experts and selected for the Microsoft Top 100 Partner program, Sapiens is committed to partnering with our customers for their entire transformation journey and is continuously innovating to ensure their success.
- Post-IPO equity
- 5.2k employees
- Founded 1982
3
Playtech· London, England, United Kingdom
Founded in 1999 and premium listed on the Main Market of the London Stock Exchange, Playtech is a technology leader in the gambling industry with over 7900 employees in 20 countriesPlaytech is the gambling industry’s leading software and services supplier and partners with many of the world’s leading regulated online, retail and mobile operators, land-based casino groups, government sponsored entities such as lotteries, and new entrants opening operations in newly-regulated markets. Its business intelligence-driven gambling software offering includes casino, live casino, bingo, poker and sports betting.We are the pioneers of Omni-channel gambling which, through Playtech ONE, offers operators and their customers, a seamless, anytime, anywhere experience across any product, any channel (online, mobile, retail) and any device using a single account and single wallet. It provides marketing expertise, sophisticated CRM solutions and other services for operators seeking a full turnkey solution.The company has won numerous awards including the prestigious Gaming Intelligence Game of the Year award 2018 for its Age of the Gods games that includes slots, table games and live casino.Alongside our own cutting-edge gaming studios and content we license some of the world's most popular brands from Hollywood studios including Warner Bros. Consumer Products on behalf of DC Entertainment, Paramount, Fox, NBC Universal, MGM and many more.Playtech Financials operates both on a B2C and B2B basis. Our B2C focused offering is an established and growing online CFDs broker, operating the brand markets.com. Our B2B offering includes the division's proprietary trading platform, CRM and back-office systems, as well as its liquidity technology platform which provides retail brokers with multi-asset execution, prime brokerage services, liquidity and complementary risk management tools.If you are an ambitious, creative thinker and would like to work for us we want to hear from you!
- Post-IPO debt
- 3.8k employees
- Founded 1999
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4
Genius Sports· London, England, United Kingdom
NYSE: GENIGenius is the operating system for modern sport. Building technology and experiences to make sports even better.Our solutions across the global sports ecosystem are underpinned by our next generation big data and artificial intelligence platform, GeniusIQ. By ingesting and computing multiple real-time data feeds, GeniusIQ powers a wide range of functions and applications across sports performance and officiation, fan engagement, advertising, and sports betting.Founded in 2001, Genius Sports is now one of the world’s largest sports technology companies, working with the likes of the NFL, NBA, EPL, FIBA, ESPN, Sky Sports, Flutter, DraftKings and 100s more. We're headquartered in London and New York and have offices Los Angeles, Medellin, Tallinn, Sofia, Singapore, Lausanne, Manchester and Melbourne.Visit our Showcase Pages to discover more about our products.
- Post-IPO equity
- 3.1k employees
- Founded 2001
5
Reach plc· London, England, United Kingdom
We’re Reach plc and we’re proud to be the UK and Ireland’s largest commercial news publisher.We connect with people on and offline, sharing our trusted content through 120+ brands, from household names like the Mirror, Express, Daily Record and Daily Star, to local titles like MyLondon, BelfastLive and the Manchester Evening News, plus our growing US brands like the Irish Star.We are in the communities we serve, we understand people’s values and passions, and we reach people where they live - whether that’s their neighbourhood newsstand, their social feed or their favourite app. That’s why every month we reach 70% of the UK online population,10% of the US population, and over 100m social followers around the world.
- Post-IPO debt
- 2.1k employees

6
Cazoo· London, England, United Kingdom
Cazoo. Honestly, FinallyOur ambition is to make used car search clearer and simple.Search 250K+ used cars from dealers nationwide
- Post-IPO debt
- 884 employees
- Founded 2018
7
ATG (Auction Technology Group)· London, England, United Kingdom
A global technology company with over 450 employees, ATG is transforming the way billions of pounds, euros and dollars' worth of items are bought and sold globally via auction. ATG is headquartered in London with additional offices in the US, Mexico and Germany, and is listed on London Stock Exchange. We operate the world’s leading marketplaces and auction services for curated online auctions, seamlessly connecting buyers from around the world to trusted sellers across two major sectors: Industrial & Commercial, and Art & Antiques. We provide leading online marketplace capabilities, and a range of value-added tools and services that maximise value on lots sold and increase efficiency. ATG’s marketplaces include: Art & Antiques: LiveAuctioneers - North America's favourite destination for fine and decorative art, antiques, vintage collectables and luxury goods. thesaleroom.com - Europe's leading marketplace for fine art & antiques auctions. lot-tissimo - Germany's foremost fine art & antiques marketplace. EstateSales.NET – a leading US estate sales listing site, providing a platform to facilitate estate sales across the US Chairish – a leading global online marketplace for vintage furniture, décor and art. Pamono – a leading European marketplace for furniture, lighting, art, accessories and jewellery. Industrial & Commercial Proxibid - the largest online auction marketplace in North America, listing items across 16 categories from agricultural machinery to classic cars. BidSpotter.com and BidSpotter.co.uk – the world leaders in industrial online auctions. Together the sites provide a world-leading marketplace for industrial, manufacturing and food processing equipment auctions. i-bidder.com - the UK’s leading auction marketplace for returned and surplus consumer product.
- Post-IPO debt
- 660 employees
- Founded 1971
8
Rezolve Ai· London, England, United Kingdom
Rezolve Ai revolutionizes how customers discover, engage and shop online. Our unique suite of Generative AI solutions, braincommerce, braincheckout and brainassistant are purpose built for retail and ecommerce.Our proprietary LLM is immune to model drift and hallucinations, ensuring businesses are able to provide a trusted service that is secure and personalized to their needs. Learn more about how we can help your company transform the customer experience with BRAiN Conversational AI.
- Post-IPO equity
- 585 employees
- Founded 2016
9
Moonpig· London, England, United Kingdom
At Moonpig Group our mission is to help people connect and create moments that matter. We’re an international group made up of two brilliant brands – Moonpig in the UK, US and Australia, and Greetz in the Netherlands.We’re a technology platform at heart, but our customers know us as the leading eCommerce destination for greetings cards, gifts and flowers. Last year we delivered over 70 million personalised cards, gifts and flower bouquets in over 50 million orders, helping our customers celebrate all the occasions that matter to them, from milestone birthdays and anniversaries to new arrivals and all of those just-becauses.We have awesome people and a caring company culture: We give teams autonomy while supporting personal growth at all levels. Plus, we know how to have fun! Don’t just take our word for it, though; in Feb 2022, Moonpig was officially recognised as an outstanding company to work for by Best Companies and we earned a 2-Star accreditation, which is Best Companies second-highest standard of workplace engagement and represents organizations striving for the top. Head over to our careers site for more company info and our current opportunities - https://www.moonpig.com/uk/blog/moonpig-careers/moonpig-careers/
- Post-IPO debt
- 547 employees
- Founded 2000
10
ECARX· London, England, United Kingdom
ECARX is a global automotive technology provider partnering with OEMs to accelerate the future of software-defined vehicles.Vehicles are no longer just metal and wheels. They've evolved into cutting-edge, intelligent hubs of smart tech that empower and connect people in ways drivers and passengers have previously only imagined. We’re at the forefront of reshaping the very fabric of the relationship between humans and vehicles, and we’re doing it at lightning-fast pace.As OEMs develop new vehicle platforms from the ground up, ECARX is developing a full-stack solution to help continuously improve the in-car user experience. To date ECARX products have been integrated into more than 9.3 million cars worldwide, and it continues to shape the interaction between people and vehicles by rapidly advancing the technology at the heart of smart mobility.Founded in 2017, we’re building something extraordinary. Our growing and global team across Europe, China and USA are working towards one ambition: to redefine the driving experience by making it safer and more enjoyable for everyone.
- Post-IPO equity
- 452 employees
- Founded 2017

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Find engineers at IPO SaaS companies in London

Searching for “engineers at top IPO SaaS companies in London” surfaces this slice of the market. The list above ranks SaaS companies headquartered in London whose latest disclosed round is IPO, by current headcount, drawn from public LinkedIn and Crunchbase records. With 23 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 - IPO, 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 IPO from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes monthly.

Last refreshed: Fri, 18 Sep 2026 07:56:30 GMT

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