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Top London Information Technology Companies (1,097)

Cloud • Consumer Web • eCommerce • Information Technology • Software
6 Offices
1,500 Employees

BigCommerce’s mission is to help merchants sell more at every stage of growth, from small startups, to mid-market businesses, to large enterprises. As a leading Open SaaS solution, BigCommerce empowers merchants to build, innovate and grow their businesses online. Simply put, we focus on being the best commerce platform so our customers can focus on what matters most: growing their businesses. If you’re looking for the challenge of an innovative company with the opportunity of a career-enhancing business, a people-centered culture, and outstanding benefits this is the place for you!


Cloud • Fintech • Information Technology • Machine Learning • Software
12 Offices
4,700 Employees

Xero is a global small business platform with 3.95 million subscribers which includes a core accounting solution, payroll, workforce management, expenses and projects. Xero also has an extensive ecosystem of connected apps and connections to banks and other financial institutions helping small businesses access a range of solutions from within Xero’s open platform to help them run their business and manage their finances.


Artificial Intelligence • Cloud • Information Technology • Machine Learning • Software • Big Data Analytics • Automation
8 Offices
1,200 Employees

PagerDuty, Inc. (NYSE:PD) is a global leader in digital operations management, enabling customers to achieve operational efficiency at scale with the PagerDuty Operations Cloud. The PagerDuty Operations Cloud combines AIOps, Automation, Customer Service Operations and Incident Management with a powerful generative AI assistant to create a flexible, resilient and scalable platform to increase innovation velocity, grow revenue, reduce cost, and mitigate the risk of operational failure. Half of the Fortune 500 and nearly 70% of the Fortune 100 rely on PagerDuty as essential infrastructure for the modern enterprise. PagerDuty is Great Place to Work-certified™, a Fortune Best Workplace for Millennials, a Fortune Best Medium Workplace, a Fortune Best Workplace in Technology, and a top rated product on TrustRadius and G2. Go behind-the-scenes at careers.pagerduty.com and @pagerduty on Instagram.


Cloud • Fintech • Information Technology • Machine Learning • Software • App development • Generative AI
17 Offices
1,810 Employees

BlackLine gives you the innovation of AI-powered software solutions you need to optimize workflows, reduce risk, and prepare for tomorrow’s strategic F&A challenges. BlackLine is the leader in the cloud financial close market and the first and only holistic solution to address intercompany operations. Companies can execute and manage financial close, intercompany, and invoice-to-cash processes with end-to-end transparency and intelligent automation. They can shift their focus from governance to guidance and deliver strategic business outcomes faster and with greater control. Since our founding in 2001, BlackLine has become a leading provider of cloud software that automates and controls critical accounting processes. BlackLine is ranked No.5 globally on The Software Report’s 2023 ‘Top 100 Software Companies’ list and earned ‘Top Rated’ awards in Accounting, Financial Close, and Accounts Receivable from TrustRadius. BlackLine was also named to Newsweek’s ‘Most Loved Workplaces’ lists in the US (2022) and UK (2023).  BlackLine is trusted by thousands of companies across all industries and geographies. Headquartered in Woodland Hills, CA, BlackLine is a global company with operations in locations including Pleasanton, New York, London, Paris, Bengaluru, Frankfurt, Tokyo, Singapore, and Sydney. Leading companies like SiriusXM and Domino’s trust BlackLine to close faster with complete and accurate results.


Fintech • Information Technology • Insurance • Software
4 Offices
1,100 Employees

Simply Business is dedicated to making small business insurance simple and accessible. Our robust digital marketplace allows small business owners to find and buy the insurance they need online, matching them with coverage from multiple top insurers to offer choice, transparency, and value. We have nearly 20 years of experience supporting small businesses, with over 1 million customers worldwide. Founded in the U.K. in 2005, Simply Business launched its U.S. operations in 2017 and today employs over 1,000 people across offices in London and Northampton in the U.K., and in Boston and Atlanta in the U.S.Simply Business is more than our name. It’s how we approach small business insurance.


HR Tech • Information Technology
London, England
61 Employees

Attracting and retaining great people is the number one priority of any successful business, and it has never been more difficult. Yet, most organisations are held back by relying on poor data and unsophisticated tools to make their pay decisions. That’s why we started Ravio. We take the guesswork out of decision-making with real-time market data, and provide a suite of tools to help companies effectively manage and communicate compensation. We’re backed by top European and US investors, and are trusted by high growth technology companies including Deliveroo, Truelayer, Flink and Zego


Artificial Intelligence • Cloud • Information Technology • Consulting
7 Offices
61,628 Employees

In 1939, Bill Hewlett and Dave Packard, college friends turned business partners, started the original Silicon Valley startup in the space of a rented Palo Alto garage. Starting with audio oscillators, the friends built the foundation for a company that would grow to become a global leader in enterprise technology. More than 75 years later, our success is exemplified through our employees’ drive to advance ideas that bring meaningful innovations to life for our customers and partners around the globe. We are guided by our mission to help customers use technology to turn ideas into value, and empower them to transform industries, markets and lives. We simplify Hybrid IT, power the Intelligent Edge and provide the expertise to make it all happen.


Big Data • Information Technology • Machine Learning • Sales • Software • Database • Generative AI
8 Offices
3,500 Employees

ZoomInfo is the go-to-market (GTM) platform for businesses development and revenue growth. Powered by real-time data and insights, our unified engagement platform helps sales and marketing teams find, acquire, and grow customers.


Information Technology • Insurance • Software
London, England
108 Employees

We are transforming the insurance industry through the power of decision intelligence. Disconnected systems, unruly data, and outdated processes are undermining the ability of insurers to make their best decisions.​ We see a better way. We combine first-hand actuarial experience and first-class engineering expertise with a passion for technology, to develop solutions that enable quicker, smarter decision making. Teams are more agile, collaborate more deeply, and work more productively. They update their models more regularly, and have access to a broader array of tools than ever before. Our progressive approach, effective integration and continued support ensure our software delivers from day one and continues to evolve to meet the needs of your future ambitions. We work closely with our clients so they can embrace the digital revolution, enhance productivity and transform the performance of their organisation.

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Information Technology • Software • Financial Services • Big Data Analytics
19 Offices
4,000 Employees

Together, we've turn ambition into action. For more than three decades, Citadel has captured undiscovered market opportunities in markets around the world by empowering extraordinary people to pursue their best and boldest ideas. We strive to identify the highest and best uses of capital to generate superior long-term returns for the world’s preeminent public and private institutions.


Gaming • Information Technology • Mobile • Software
12 Offices
6,500 Employees

Headquartered in New York City, Take-Two Interactive Software, Inc. is a leading developer, publisher, and marketer of interactive entertainment for consumers around the globe. We develop and publish products principally through Rockstar Games, 2K, Private Division, and T2 Mobile Games. Our products are designed for console systems and personal computers, including smartphones and tablets, and are delivered through physical retail, digital download, online platforms, and cloud streaming services.


HR Tech • Information Technology • Sales
8 Offices
490 Employees

We're Indeed Flex, a revolutionary app for temporary work empowering job seekers with the fastest way to find work that fits their lifestyles. Through our evolving technology, we're putting work in the palm of people's hands, enabling them to decide where, when, and how they work at the click of a button. At the same time, we partner with employers to deliver access to high-quality workers - "Flexers", as we call them - matched to their needs. With the support of Indeed.com, the world's #1 job site, Indeed Flex operates in full autonomy as we strive to transform the staffing landscape by making access to work and job seekers frictionless. We're expanding rapidly and recruiting the brightest, boldest talent to help us achieve our mission. Want to join our journey?


Information Technology • Software • Consulting
London, England
207 Employees

We are an independent software and technology consultancy who pride ourselves on our ability to deliver complex technology solutions for our clients. We focus on understanding our client’s business and work with them to deliver change that makes their business more effective. Our multidisciplinary teams are made up of delivery experts, technology and software experts and user experience experts who have the drive, talent and creativity to take strategies from inception all the way through to business adoption. We provide the following services: 1) Technology Consulting To help get large technology projects off to the best possible start we can provide technical consultants who work with our clients to provide them with independent technical advice and guidance, supporting them with market analysis, IT strategy development, technical architecture and technical risk assessment. 2) Software Engineering We believe that working in a small, highly skilled, multi disciplined team is the most effective way of delivering quality software. At the core of our philosophy is the need for the entire team to have a shared common understanding of the product that they need to build. 3) Delivery Consulting Our delivery practice is focussed around you the client. By focussing on understanding your needs and your customers needs we will work with you to create a delivery approach, which delivers solutions that provide outstanding results for your business and your customers. 4) Business Consulting Bridging the gap between users, business stakeholders and digital delivery teams to truly understand goals and develop pragmatic, creative and effective solutions. Follow us on Twitter @SoliriusC


Artificial Intelligence • Cloud • Information Technology • Security • Software • Cybersecurity • Data Privacy
11 Offices
1,000 Employees

Snyk is the leader in developer security. We empower the world’s developers to build secure applications and equip security teams to meet the demands of the digital world. Our developer-first approach ensures organizations can secure all the critical components of their applications from code to cloud, leading to increased developer productivity, revenue growth, customer satisfaction, cost savings, and an overall improved security posture. Used by 4,000+ customers worldwide today, Snyk’s Developer Security Platform automatically integrates with a developer’s workflow and is purpose-built for security teams to collaborate with their development teams.


Fintech • Information Technology • Payments • Financial Services
London, England
379 Employees

Mangopay is a modular and flexible payment infrastructure provider. We power payments for the world's largest and most innovative marketplaces and platforms, including Vinted, Chrono24, Wallapop, La Redoute, Rakuten and many more. Partner with us to select and connect the products you need to succeed, from pay-in to payout and everything in between


Information Technology • Software • Analytics • Consulting
London, England
233 Employees

The Information Lab is on a mission. To help as many people and companies as possible to make sense of their data. Through our partnerships with Tableau, Alteryx, Snowflake & AWS, we have become a leader in both software sales and data analytics consulting services. Our team is deeply passionate about data analytics and we spend our time helping others to share our passion, get value from their software investments and change their worlds through data. We have worked with over 2000 companies across the 8 European countries in which we operate, addressing a wide variety of use cases and departments. In addition to reaching a large customer base, we introduce hundreds of people from highly diverse backgrounds to careers in Data Analytics through our Data School programme, and have created a fun, vibrant culture within the company along the way. Join in the fun at thedataschool.co.uk/apply.


Cloud • Information Technology • Consulting
9 Offices
46,070 Employees

We have the world’s best talent that design, run, and manage the most advanced and reliable technology infrastructure each day. Together, we think holistically about the health of these vital technology ecosystems. We are a focused, independent company that builds on our foundation of excellence by creating systems in new ways. Bringing in the right partners, investing in our business, and working side-by-side with our customers to unlock potential. We're raising the bar. Our experience speaks for itself: We have 90,000 highly skilled employees around the world serving 75 of the Fortune 100. But our purpose is what drives us: Advancing the vital systems that power human progress. Because when a digital ecosystem is healthy, it can more readily adapt and support continuous growth and that opens up a world of possibility for everyone.


Fintech • Information Technology • Financial Services
6 Offices
892 Employees

MarketAxess is on a journey to digitally transform one of the world's largest financial markets, enabling the shift from analog, phone-based trading to a fully electronic marketplace. Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There will be twists and turns because no one’s ever done this before. But now, more than 2,300 companies around the world rely on our solutions, and that number is only expected to grow in the years ahead. We know where we’re going. How we get there is up to us. Join us and help Take Us There.


Information Technology
4 Offices
200 Employees

Actionstep is the leading law firm management platform for midsize firms around the world. Our platform is built to adapt to a firm’s unique strengths and goals, empowering firms to modernize and build a firm advantage in the legal marketplace. Connected features like client intake, matter management, document management and automation, time tracking, billing, legal accounting, and business reporting, equip nearly 40,000 users globally to work more efficiently, delight clients, increase profitability, and confidently embrace growth. Find out how to build your firm's advantage and request a demo at www.actionstep.com.


Aerospace • Digital Media • Information Technology • Internet of Things • Mobile • Software
20 Offices
2,100 Employees

In December of 2020, Intelsat completed its acquisition of the Commercial Aviation business of Gogo, creating the world’s leading provider of inflight broadband connectivity to the commercial aviation industry. Our offerings bring worldwide inflight Wi-Fi services that make internet and video entertainment a regular part of flying. We are a diverse and mission-minded group of professionals all working together in extraordinary harmony. And that’s just the beginning. We connect the aviation industry and air travelers with innovative technology and applications, and we do it all in a high-energy, Metra and L-friendly environment that welcomes the next challenge. Be prepared to join a performance-obsessed team that is passionate about bringing the internet to every device, every flight, everywhere.