London is a key global city and a prime location for some of the world’s largest companies. Microsoft was one of the first modern tech giants to set up shop in London, having opened its office there in 1982. Since then, more firms have followed suit. A local tech community has even formed in an area now known as East London Tech City, attracting tech companies headquartered in the United States. Below, we listed some of the top U.S. Companies with offices in London, and many are on the lookout for top tech talent.
Top U.S. Companies with Offices in London to Know
- Microsoft
- Amazon
- American Express
- Toast
- Take-Two Interactive
Top US Companies With Offices in London
Sojern is a San Francisco-headquartered adtech company specializing in digital marketing for the travel industry. The company, which established a London office in 2017, provides a travel marketing platform that uses data to assist hospitality businesses in identifying and connecting with their target audiences. Sojern uses artificial intelligence to power its platform and enhance guest engagement for businesses such as hotels.
PagerDuty’s platform is designed to support operational resilience and productivity for businesses in industries ranging from retail to healthcare. The company says its technology can save enterprises money and help them improve the customer experience. PagerDuty has a partner program that allows it to offer more than 700 platform integrations.
TransUnion offers a variety of digital tools designed to help consumers monitor, protect and improve their credit health. It also has an array of business solutions with applications across industries ranging from financial services to media and entertainment. TransUnion bases its headquarters in Chicago, but the company also has a significant presence in Europe, which includes a London office.
Monte Carlo Data’s end-to-end observability platform analyzes client companies’ data assets to ensure their health and quality. It aims to help users understand the severity and urgency of concerns so engineers can resolve them most efficiently. The company opened a new office in the Marylebone area of London in 2025.
Healthtech company Flatiron Health is dedicated to helping cancer centers deliver better patient care by analyzing real-time patient experiences to improve treatment and advance research. Its London office, located at Merchant Square within a WeWork, offers modern workspaces and is just steps from Paddington Station, providing easy access to public transit.
Amazon is a household name due to its influence across a range of sectors that touch our lives every day. Of course, it’s most well known for its e-commerce marketplace, which sells thousands of products, but the company is also one of the largest cloud providers through its AWS division and its media production arm, Amazon Studios. The company is headquartered in Seattle, Washington, but has a 15-story office building in London.
Samsara’s Connected Operations Platform is designed to streamline access to IoT data for businesses, helping them enhance safety, productivity and sustainability across their physical operations based on actionable insights. London is the site of Samsara’s European headquarters, where more than 200 employees work.
DraftKings is a tech company building digital products for sports fans. Its web and mobile platforms make it easy for users to bet on their favorite sports and teams as well as participate in fantasy sports leagues. DraftKings also offers access to a broad variety of virtual casino games.
Navan is a corporate travel and expense software company. Its platform aims to make corporate travel easier by offering tools for booking accommodations, managing reimbursements and accessing support. Its customizable features cater to employees, finance teams and travel managers alike. The company is headquartered in Palo Alto, California, with a growing presence in London.
Take-Two Interactive Software, or T2, is a video game developer and publisher. The company has an office in London that contributes to its various divisions, including Rockstar Games, its subsidiary that produces the popular GTA franchise. Take-Two Interactive Software also has a separate location in the city that houses mobile game developers.
Rubrik is a cybersecurity company that specializes in providing organizations with solutions designed to protect their critical data and enhance their resilience. Its offerings help enterprises, governments, healthcare providers and educational institutions defend against cyber attacks and operational disruptions.
Cencora is a pharmaceutical solutions organization that aims to improve healthcare access for both animals and humans. The company, which is headquartered in Pennsylvania, also has multiple offices surrounding London, in Woking, Feltham and Chessington.
Toast is a popular all-in-one restaurant platform. Its software provides front- and back-of-house solutions, including online ordering, payment processing, staff scheduling, supply management and more. Toast first rolled out its software in the greater London area in 2023, where it houses the engineering, sales and marketing teams.
Mastercard powers digital payments, offering solutions that support individuals and businesses all over the world. The company has a London office based in Angel Lane that features dedicated breakout areas, a terrace garden overlooking the River Thames and proximity to multiple major transportation hubs.
Through its money transfer solutions, Remitly supports people across dozens of countries, simplifying the way they send and receive funds across borders. The company is headquartered in Seattle, Washington, but has several additional global office locations, including one in London.
Cybersecurity platform Snyk is on a mission to ease the lives of developers by securing custom code and cloud infrastructure from the jump. With an office near Camden, across from The British Library, the company provides numerous in-person opportunities for team members to connect, including company-sponsored outings and volunteer days.
CAIS is an alternative investment platform for financial advisors, allowing them to gain access to alternative investment funds and products along with educational resources. It provides a learning system to help advisors improve client outcomes. The company has a London office located in the Old Street area.
Magnite helps media owners sell digital advertising space across websites, streaming and mobile apps. It facilitates automated workflows and offers companies data-driven tools designed to help them effectively manage and grow advertising revenue.
Sendbird is an AI company based in Silicon Valley. The company aims to create an AI-powered chat API that can help brands deploy chatbots and automation software for SMS and video engagement. Sendbird launched in 2013 and is backed by some of the biggest names in tech, including Y Combinator and Softbank.
Microsoft is not only one of the largest software companies in the world, but also one of the most influential in generative AI. Famous for its operating systems and productivity suite, the company traces its origins to the 1970s, establishing a presence a U.K. presence in 1982. In 2024, Microsoft announced it would open an AI hub in London to contributes to the company’s Copilot platform and research AI.
Celonis helps businesses improve their internal processes through analysis on its platform. The company’s European headquarters are in Munich and it has 3,000 employees throughout its global operations. Its London office is in the Bloomsbury area, where it has bike parking and complimentary healthy snacks.
Trumid is a fintech company that has an office located in Central London. It’s creating a credit trading network for corporate bonds using its technology and product design expertise. The company says that its team comes from diverse backgrounds and industries.
AlertMedia provides businesses with communication and intelligence solutions that help them prepare for and respond to emergency incidents. Its platform is equipped with tools for sending mass emergency notifications, monitoring risk for employees traveling abroad and giving users 24/7 access to intelligence analysts. The software company is headquartered in Austin, Texas, but has expanded its footprint internationally by opening offices in Mexico and the U.K.
Nasuni offers a hybrid cloud architecture solution that enables comprehensive, scalable data control for businesses. The company serves customers across dozens of countries. Nasuni is headquartered in Boston, Massachusetts, but also has U.K. operations that are based out of an office in London.
GRAIL is a healthcare company focused on early cancer detection using advanced technology, next-generation sequencing and population-scale clinical studies. Its Galleri test analyzes DNA released into the bloodstream from all cells in the body, including cancer cells. GRAIL’s London office is situated south of Camden Town, close to the British Library.
Motive’s AI-powered platform is designed to enhance safety, productivity and profitability for businesses through solutions that cover driver safety, fleet management, equipment monitoring, spend management and workforce management. The multinational company has established a London office location.
CDW has an office located in Central London and offers benefits that include flexible time off, along with conferences and job training. The company is a multi-brand provider of IT solutions for organizations in Canada, the US and the UK that include healthcare, education, government and business clients. It aids said customers in maximizing their return on investment for the IT market.
Klaviyo helps companies use their data to send targeted messages to engage consumers, and its platform comes with more than 350 integrations. Headquartered in Boston, the company has six offices worldwide, including one in central London.
Crunchtime is a software company that offers solutions for streamlining management of restaurant operations. More than 850 restaurant brands rely on its platform. Although headquartered in Boston, Crunchtime has established multiple additional global office locations, including one in London that’s actively hiring.
Clear Street aims to enhance the brokerage ecosystem through its institutional, professional clearing and active trader services. The company has a growing London-based team that has direct access to the Ring where open outcry trading happens for the London Metal Exchange.
American Express is a popular financial institution among consumers. The company distinguishes itself from other credit card companies by providing high-end metal cards that earn points on every transaction. In addition to credit cards, American Express also provides consumer and corporate banking services, as well as a number of travel benefits for cardholders.
