Top Tech Startups in London, United Kingdom in 2026

We provide booking and marketing software to enable barbershop and beauty salon owners to easily take bookings online, manage their time and market to their customers.

Orphic Health is an Oxford University spin-out building the evidence-based clinical reasoning platform that makes AI safe for healthcare. We combine exclusive access to one of the world's largest clinical guideline repositories with world-class AI research to deliver something auditable, up-to-date, and ready for real clinical workflows. We're well-funded and generating revenue with large US healthcare enterprise partners. The team brings deep experience across Oxford AI research, McKinsey, Fortune 200 health tech, and major payer/provider systems, and practising MDs.

Sustenra is an independent advisory firm helping institutions strengthen the governance, oversight and long-term performance of funded programmes. We work with corporate foundations, philanthropic funders, financial institutions, impact investors and sustainability teams. Our work can begin before funding is committed, when organisations need to assess partners, governance, delivery structures and risk. It can continue during implementation, when stronger oversight, accountability or performance visibility is needed. We also support programmes when delivery is under pressure, relationships are strained or funding is changing or coming to an end. Sustenra was founded by three women with experience across programme delivery, funding, research, evaluation, policy and institutional governance. Between us, we have worked across the United Kingdom, Europe, North America, the Middle East, Africa, Eastern Europe and Central Asia. We are a senior-led firm. Clients work directly with experienced advisers who understand both institutional decision-making and the realities of programme delivery. We do not have an implementation arm or commercial referral model, which allows us to provide an independent view of what is working, what is not and what needs to change. Our aim is simple: to help institutions make better funding decisions, identify risks earlier and build programmes that remain credible and effective beyond the first funding cycle.

Warmo is a GTM Signal Intelligence Platform that helps B2B founders, agencies, and sales teams find high-intent prospects automatically. Instead of spending hours on manual research, Warmo monitors the live web for real buying signals - funding rounds, hiring surges, market expansions and surfaces the right companies, the right decision makers, and AI-written outreach angles.

We believe no one should be a stranger just because they don't share your language. Imagine two people, no shared language, talking as easily as old friends. That's exactly what we are building: real-time translation for real-world conversations. It sounds like it should already exist. It doesn't. We're a small, well-funded team in the heart of London, backed by people who built the tech already in your pocket, and we're right at the start. No one has built this before, including us, and that's the best part. The people here now are the ones shaping the product, and that could be you!