Top Tech Startups in London, United Kingdom in 2026

Wearable device, artificial intelligence, mobile application

stakefish is the leading validator for Proof of Stake blockchains. With support for 10+ networks, our mission is to secure and contribute to this exciting new ecosystem while enabling our users to stake with confidence. Because our nodes and our team are globally distributed, we are able to maintain 24-hour coverage.

HITAI, a cutting-edge combat sports technology startup, is on a mission to enhance fan engagement and empower athlete performance. Utilizing our custom computer-vision technology, we bring live, immersive analytics to fans and provide athletes with unparalleled training tools and performance insights.

Retailers spend heavily to win a customer at checkout — then lose the same customer at their next device upgrade 18–24 months later. Each upgrade cycle effectively resets CAC to zero. Techster builds infrastructure that keeps that upgrade inside the same retailer checkout. We combine subscription mechanics, residual value modelling, and upgrade-timed routing to turn one-off device sales into predictable, multi-cycle recurring revenue. Instead of reacquiring customers through paid channels, retailers retain them economically — because upgrading at the same checkout is cheaper and easier than leaving. We start with UK iPhone-heavy retailers, where upgrade behaviour already exists (~80% of devices are on monthly payments). The infrastructure to capture those upgrades does not. Our model is asset-light and capital-efficient, partnering with finance providers rather than holding inventory. We are currently pre-seed and building toward 1–2 retailer pilots.

We're here to change the way people use insurance - safely, compliantly, and on their terms. AI is increasingly where people turn to handle things like insurance. They’re complex products, with real life relevancy, and they’re often not explained well by their providers. That’s great in principle, but it creates real problems for insurers, customers, and regulators - a lot of the machinery that exists around agents today is simply not built for regulated products. Marrow is building the platform that fixes that: the compliance-grade infrastructure that every AI insurance agent runs on. We're live with Aviva, one of the UK's largest carriers, and building a pipeline across the UK and Europe. We’re on the path to regulated status in our own right, are VC-backed, and have a small team that's moved faster than most companies ten times our size. Off the back of a recent fundraise, we’re hiring a small number of high-leverage roles to help us move forward in leaps and bounds.

NS Consultancy Global is a security and risk consultancy dedicated to helping organizations operate with confidence in an unpredictable world. We work alongside boards, executives, and operational leaders to clarify risk, strengthen protection, and build resilient organizations that can withstand disruption. Our consultants bring deep experience across security strategy, risk management, and crisis preparedness. We combine analytical rigour with practical insight, turning complex threats into clear choices and actionable plans. Every engagement is tailored, discreet, and aligned with your broader business objectives—not treated as a standalone security exercise. Whether you are safeguarding people and facilities, preparing for critical incidents, or reassuring regulators and stakeholders, NS Consultancy Global acts as a trusted, independent partner. Our focus is simple: to help you anticipate risk, respond decisively, and protect what matters most.

We operate with the agility and energy of a high-growth scale-up, but we are backed by the stability and resources of Indeed - the world’s #1 job site. This gives us a unique advantage: the freedom to innovate at speed, with the muscle to dominate the market. We’re helping people get jobs by modernising the world of temporary work. At Indeed Flex, we provide our community of "Flexers" with total control, choice, and ownership over how they work. Through our evolving technology, we’re putting the power of work in the palm of people's hands—connecting businesses with skilled, vetted talent and giving job seekers the fastest way to find shifts that fit their lifestyles. This platform helps businesses scale their workforce efficiently during busy periods without long-term commitment or administrative hassle. Whether it’s hospitality, retail, or warehousing, we’re building a more flexible, efficient, and empowered labour market for everyone.

CRUX is a platform designed to simplify and humanize legacy planning. We empower individuals to preserve what matters most—memories, messages, and essential documents—and ensure they reach their loved ones with ease, clarity, and security. CRUX eliminates the chaos, legal battles, and emotional distress that families often face when a loved one passes, providing a secure way to share your story, wisdom, and plans on your terms.

Vestico combines AI & user-generated content to show shoppers how clothes fit before they buy & collect actionable data throughout their shopping journey. Most of us don't look like the models we see online, so it's difficult to make the right decisions about size and fit. Returns in fashion e-commerce can go as high as 60% and cost retailers over $500B every year in the US alone. Far more importantly, e-commerce returns are having a devastating impact on our planet due to emissions, repackaging, restocking, and waste, with over six billion pounds of returned clothes ending up in landfill in 2019. Vestico solves the returns problem for retailers by showing shoppers how products look on people just like them. We give shoppers the confidence to buy and the information to buy intelligently, reducing returns and boosting conversion. By combining the authenticity of user-generated content with sizing AI, Vestico supports diverse representation at scale while solving the online fashion shopper's biggest pain point.