Top Tech Startups in Greater London, United Kingdom in 2024

SuperTokens is one of the largest open source authentication projects in the world. Every web and mobile app in the world with users, requires user authentication. SuperTokens has 11K+ Github stars and was the top 20 fastest growing open source companies in 2022 as per the ROSS index by Runa Capital. We have thousands of production applications and are revenue is scaling exponentially. We're doubling our team over the next few months (as of Feb 2024) 1. We're easier to implement as we take a modular approach - making it possible to pick only the features you need for your use case. This means you need not worry about complications associated with other features (eg: SSO and OAuth if you don’t need it) and this in turn makes it easier to implement and manage SuperTokens. 2. Developer's can own and manage their user's data. 3. SuperTokens can be run on your premise for free and also has a generous hosted tier for those who dont want to manage it themselves.

The secure, cloud-based communications platform that connects markets and individuals, Symphony promotes collaboration and increases workflow productivity while maintaining organizational compliance. Founded in October 2014 and headquartered in Palo Alto, CA, the company has offices in New York, Chicago, Boston, Hong Kong, Singapore and London. Symphony has raised $170 million from the world’s largest financial institutions and recognized investors. To sign up for Symphony, find out more about the company and keep up on the latest news, visit symphony.com.

Insider Growth Management Platform (GMP) helps digital marketers drive growth across the funnel, from Acquisition to Activation, Retention, and Revenue. Leveraging real-time predictive segmentation powered by deep Artificial Intelligence and Machine Learning capabilities, GMP empowers marketers to deliver personalized journeys across web, mobile web, mobile apps, and ad channels. Insider is a technology company with offices in London, Singapore, Tokyo, Dubai, Moscow, Warsaw, Kuala Lumpur, Jakarta, Istanbul, Kiev, Sydney, Seoul, Ho Chi Minh City, Bangkok, Hong Kong and Taipei. Insider was listed as one of the 100 Hottest Startups by WIRED Magazine and won Red Herring Top 100 Europe in 2017. Insider is trusted by over 300 businesses across various industries including UNIQLO, Singapore Airlines, Tokopedia, Virgin, New Balance, Nissan, Huawei, Samsung, Orange, Puma, Ticketmaster, Newsweek, Air Arabia, Media Markt, AVIS, Allianz, BBVA, Domino’s, McDonald’s, Avon and CNN.

Plum is powered by automation, and acts like an autopilot for your money. You sit at the controls, with smart spending analytics and budgeting tools to help you set your financial destination. Plum gets you there safely, so you don’t need to remember things like setting money aside, getting the best deal on household bills. Plum’s making your savings and investments work for you.. Our Mission: We’ve Imagined a world where people effortlessly manage their money without having to worry, or even think about it. A world where our users’ money has a brain that’s configured to automatically reach what is important to them. ...And here at Plum, we made it our mission to build that world... and we’re now ready to make it a reality for Plumsters. We welcome them to our reality! Where their money works for them, and their entire financial journey is easier by an autopilot, controlled by them.

Smarkets is an exchange platform for betting and trading on sport and politics. We operate two main consumer products - the Smarkets exchange and SBK sportsbook app - in the UK, US, and other global markets. Being a Software Engineer at Smarkets means working in high-performing teams that have control over the features they ship and the code they write. We have built a modern tech stack around Linux, Kafka, Postgres, and Kubernetes using Python 3, C++20, Rust, and React. The Smarkets platform is used by tens of thousands daily through the app, website or REST API. We are continuously developing new features for these platforms, or improving performance, scalability and usability in the backend.

Uncountable has built an enterprise software platform for R&D organizations to minimize the number of experiments required to reach a higher level of performance. By using the platform, scientists have instant access and search-ability to all of their previous formulations, instead of digging through disparate spreadsheets. And with previous experimental records properly structured and stored, Uncountable's artificial intelligence engine can be manipulated to provide the best formulation suggestions in order to achieve new product goals.

Securing the software development process, with a focus on improving developer velocity.

CoGrammar is an edtech startup that is dedicated to closing the global tech skills gap. We achieve this by integrating human mentorship and code review into the world's leading tech education brands. CoGrammar has also built and scaled its own coding education product - HyperionDev - which supports learners from over 40 countries in changing into fulfilling tech careers. HyperionDev rebranded to CoGrammar in August 2018. cogrammar.com

We are building a customizable set of solutions to help our client make smarter strategic decisions based on their data. Our products rely on our marketing consulting expertise so that we provide our client with tailored solutions that speaks the same language and matches their needs

Limio is a fast growing enterprise SaaS startup that is on a mission to improve the state of subscriber experiences online. The subscription economy is growing fast: 58 million British people now subscribe to services, be it Spotify, Amazon Prime, HelloFresh, ZipCar or the Economist (a paying customer). Our no-code Subscription Commerce Platform enables these companies to up their game and deliver better subscriber experiences. Our goal is to be the Shopify for subscriptions used by large media and software brands such as the Economist, Which? and Palisade. Limio was founded by Amaury de Closset and Daniel Morton, formerly of GoCardless (YC S11), Zuora, BCG and Three. Together, they have a track record of 15 years in subscriptions.