Top Tech Startups in United Kingdom in 2026

Reformly is a fast-growing DTC home Pilates brand operating across e-commerce and mobile. In our first 10 months, we generated over $4M in sales and built an app with 3,000+ active subscriptions. Our core audience is middle-aged women who want to feel stronger, healthier, and more confident, but often struggle with consistency. We help solve that by combining a physical Pilates board sold internationally with a mobile app that offers workouts, structure, and community. We are building more than a product. We are building a brand and ecosystem that helps women create a fitness routine they can actually stick to. Our mission is to help women become the best version of themselves. Our team is young, ambitious, and moves fast. We are not looking for people who want to coast, play it safe, or settle for “good enough.” We want people who care deeply about doing great work, want to achieve greatness in their career, and genuinely believe in what we are building. At Reformly, there is a lot of room for growth, ownership, and speed. We value initiative, decisiveness, and learning through action. We would rather make the wrong decision with conviction, learn fast, and improve, than make the right decision too slowly and without courage. If you want real responsibility, a steep learning curve, and the chance to help build something meaningful at speed, you’ll feel at home here.

Guile is a cybersecurity and AI engineering company building an autonomous penetration testing platform. We operate at the intersection of offensive security and agentic AI systems to give software teams continuous, red-team-level security validation.

What we believe.. We believe life is about socialising & smiling more. Face to face. Every day. Every week. Facebook feeds don’t count. We believe humans should be more active. Not because we’re told to but because we enjoy how it makes us feel. We believe sharing team experiences gives us all a stronger sense of belonging & purpose, in a world with less and less. We believe we’re all just over-evolved apes with mobile phones stuck to our noses. We believe salvation can be found in social sports & team events. So that’s what we spend our days delivering.

dunnhumby is the world’s leading customer science company. They analyse data and apply insights from more than 660 million shoppers across the globe to create personalised customer experiences in digital, mobile, and retail environments. dunnhumby's strategic process, proprietary insights, and multichannel media capabilities build loyalty with customers to drive competitive advantage and sustained growth for clients. dunnhumby employs nearly 3,000 experts in offices throughout Europe, Asia, Africa, and the Americas and works with a prestigious group of companies including Tesco, The Kroger Co., Coca-Cola, Macy's, Procter & Gamble, and PepsiCo. The company was founded in 1989 and is headquartered in London. It operates as a subsidiary of Tesco Stores, Ltd.