Top Tech Startups in Greater London, United Kingdom in 2027

Flat, created by Tutteo Ltd, is an online music notation platform that empowers music enthusiasts to create, learn and share music scores, tabs, and lead sheets. We believe that the old fashion sheet music industry has come to a point where it needs to be renewed. Flat is the forefront of a new way to write, teach and consume written music. We proudly support 5M+ composers and music enthusiasts around the world.

Softr is the easiest way to build custom apps and portals from Airtable, in minutes. #nocode required. With Softr, you can build client portals, internal tools, marketplaces, online communities, resource directories, websites and more. Our mission is to democratize the engineering genius. Start for free - softr.io

Braze is the leading customer engagement platform that empowers brands to Be Absolutely Engaging™. Braze helps brands deliver great customer experiences that drive value both for consumers and for their businesses. Built on a foundation of composable intelligence, BrazeAI™ allows marketers to combine and activate AI agents, models, and features at every touchpoint throughout the Braze Customer Engagement Platform for smarter, faster, and more meaningful customer engagement. From cross-channel messaging and journey orchestration to Al-powered decisioning and optimization, Braze enables companies to turn action into interaction through autonomous, 1:1 personalized experiences. The company has been consistently recognized as a Leader in marketing technology by industry analysts, and was named a G2 “Best of Marketing and Digital Advertising Software Product” in 2026. Braze was also named a 2026 Best Places to Work by Built In, a 2025 America’s Greenest Companies by Newsweek, and a 2025 Fortune Best Workplace in Technology™ by Great Place To Work®. The company is headquartered in New York with 15 offices across the Americas, EMEA, and APAC. Learn more at braze.com.

Founded in 2019, Uncapped is Europe’s first revenue-based finance provider, which allows founders to raise growth capital without giving up control of their business. The company was born out of frustration with the limited financing options available for European entrepreneurs. Uncapped provides business advances of between £10k and £1m with 0% interest and no hidden charges, allowing founders to access fair and flexible finance. It makes money by charging a low flat fee which is paid back from future sales revenue.

At DRW, we identify and capture trading and investment opportunities globally. What sets us apart is our diversified approach—trading across many asset classes and instruments, in markets around the world, with horizons from seconds to years. We succeed by bringing together sophisticated technology, in-depth research and careful risk management. DRW is headquartered in Chicago, with offices in London, Montreal, New York, San Francisco and Singapore.

Bearable makes mental and physical health tracking convenient and accessible to all, removing the need to juggle multiple different apps to stay on top of one's health and helping people to spot unique health patterns.

Constructor.io is the only search and product discovery platform tailor-made for enterprise eCommerce where conversions matter. Constructor's cloud-based solutions use natural language processing, machine learning-enhanced results ranking, and collaborative personalization to deliver powerful user experiences across all facets of product discovery -- from search to browse, recommendations, and autosuggest. We optimize revenue before relevance. This has allowed us to generate consistent $10M+ lifts for our customers, which include some of the biggest brands in retail like Sephora, Backcountry, Tommy John, Lego and Bonobos. Constructor is a U.S.-based company that was founded in 2015 by Eli Finkelshteyn and Dan McCormick.

Glovo is a mobile application operating in Spain since March 2015 that allows customers to outsource their daily errands to one of our delivery people in order to make life less cumbersome. Users can send or obtain any product in less than 60 minutes. The app connects users with independent couriers called glovers that acquire products from any restaurant, laundry or store in the city and also deliver urgent packages. In other words, Glovo is the new personal assistant available to everyone! Once the order is made, the user can interact with the glover assigned and follow his GPS position in real time. We developed a payment system that is easy and convenient – the client simply enters his credit card details when registering for the app and only gets charged once the product arrives at his doorsteps. In less than 8 months, we have launched in three Spanish cities and are already planning our international expansion. Get to know more about us at glovoapp.com

CreativeX, formerly known as Picasso Labs, powers creative excellence for the world’s most loved brands. By analyzing creative at scale, our technology aims to advance creative expression through the clarity of data. Used globally by Fortune 500 brands like Unilever, Mondelez, Heineken, ABI, Google, and more, CreativeX measures and improves creative efficiency, consistency, and effectiveness across all their creative content worldwide. Visit creativex.com to learn more or reach out anytime: [email protected].

Founded in 2013, MarcoPolo Learning is an award-winning producer of educational media for the digital generation. The company's flagship product, MarcoPolo World School, is an Emmy-nominated STEAM + literacy learning program that features a robust library of over 500 video lessons and thousands of learning activities for children ages 3-7. The characters in MarcoPolo World School, The Polos, were designed to engage children in early learning subjects and critical 21st century skills development. The Polos television series is also broadcast globally on leading channels such as Discovery Family (USA), BT TV (UK), NatGeo Kids (LatAm), Viacom (India), YouKu (China), reaching over 500 millions households. The company is headquartered in London with offices in New York and Shanghai.