As of May 2026, there are 2,146 SaaS companies based in London. They have combined revenues of $35.6B and employ 184K employees. They've raised $29.5B in capital and serve 112.1M customers combined.
Sorting: Highest -> Lowest
Showing 10 of 822 companies ranked by annual revenue.
London, Greater London, United Kingdom
FocusBox.io is a powerful productivity tool that helps you stay focused and get more done in less time. It's an all-in-one platform that combines Tasks, Pomodoro Timers, Ambient Sounds, and Insights to help you work smarter, not harder.
London, England, United Kingdom
Socital is a SaaS tool for onsite campaigns, specialized to ecommerce. We help online retailers to collect more rich data, engage more with their customers and turn unknown visitors to paying clients. Socital's A.I. processes social media data for all your visitors. Our smart and fully social engagement tools, combined with the latest data science and seamless integration across the marketing ecosystem, give digital marketers insights into target audiences and enhances their ability to deliver effective personalized experiences across paid and owned media. Learn more or request a demo at www.socital.com
London, England, United Kingdom
WorkClub is a B2B SaaS platform for on-demand workspaces and meeting rooms.
London, Greater London, United Kingdom
PAIR | Your AI Adoption Platform Where human expertise is perfectly paired with AI capability. PAIR transforms AI licences into measurable performance gains through role-specific upskilling that ensures AI becomes embedded in daily workflows, not just learnt in theory. Our platform delivers personalised, contextual AI practice tailored to each individual's exact role, industry, and priorities, that drives lasting adoption across organisations. Why leading organisations choose PAIR: - Role-Based AI Transformation: Every exercise is generated for YOUR specific role and priorities, turning concepts into immediate productivity gains - Skills Certification: LinkedIn credentials that showcase your team's AI proficiency - Built-In Adoption Architecture: In-person leadership masterclasses, strategic nudges, and adoption & engagement frameworks that drive organisation-wide uptake - Real-Time ROI Measurement: Track time saved, quality improvements, and adoption rates by team and function through intuitive dashboards - Future-Proofed Skills: Monthly content updates reflecting the latest AI models and applications, with annual recertification to maintain relevance - Enterprise Security Standards: UK/EU/US hosting options, full GDPR compliance, and Cyber Essentials Plus accreditation Impact Metrics: - 40% of users save 5+ hours weekly within just three weeks of implementation - 94% report significant work quality improvements after adopting AI workflows - Trusted by public sector departments, FTSE enterprises, and AI technology leaders including You.com Don’t just buy your staff licences for AI tools - invest in transforming how they work with AI
London, Greater London, United Kingdom
Most teams don’t need more cold outreach — they need smarter first touch. GoGTM’s Account Connect is a fully managed outbound layer that helps B2B teams engage the right accounts, earlier — with relevance, not volume. Whether you’re building your first outbound motion or supporting an existing team, we plug in to: * Warm up strategic accounts. * Spark qualified conversations * Create pipeline momentum without the overhead. Ideal for companies with complex buyer journeys and high-value offers, where trust-building matters more than spray-and-pray tactics.
Each Tuesday, we reverse-engineer a real SaaS company's revenue, profit, CAC, funnels, and its top growth tactic.
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