Top Series A Cybersecurity companies

Radware® is a global leader in application security and delivery solutions for multi-cloud environments. The company’s cloud application, infrastructure, API, and AI security solutions use AI-driven algorithms for precise, behavior-based, real-time protection against sophisticated web, application, and DDoS attacks, API abuse, business logic threats, and malicious bots. Radware delivers end-to-end API security, including discovery, posture management, testing, and runtime protection, along with advanced protection for AI agents and models. Enterprises and carriers worldwide rely on Radware to address evolving cyberthreats, protect their brands and business operations, and reduce costs. For more information, please visit the Radware website.

• Series A
• 1.6k employees
• Founded 2020

NEVERHACK is a French group specialized in cybersecurity for over 40 years.Operating in 10 countries, the group now has over 1200 collaborators worldwide.Our ambition is to expand internationally to build a secure digital world for all.🌎 What do we believe in?Creating a safer digital world by offering innovative and ethical cybersecurity solutions, empowering businesses with the keys to project success.🧐 How do we do this?We support companies and individuals in protecting their data through a unique offering of consulting, training, cyber risk assessment, and AI-driven innovations.⭐ What are our strengths?Expertise, proximity, and trust!Our expertise is demonstrated through our collaborators' certifications and rigorous recruitment process. We select top talent and offer ambitious career paths, with over 1000 certifications earned annually.We maintain close relationships with our partners, both in terms of client relations and geographically, both in France and abroad.We designate single points of contact (both commercial and technical) for increased responsiveness and availability to meet our clients' needs.Co-founder of Cyber On Board

• Series A
• 673 employees
• Founded 2021

Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats. Trustwave’s comprehensive offensive and defensive cybersecurity portfolio detects what others cannot, responds with greater speed and effectiveness, optimizes its client’s cyber investment, and improves security resilience. Trustwave leverages its world-class team of security consultants, threat hunters, and researchers, and its market-leading security operations platform to decrease the likelihood of attacks and minimize potential impact. Trustwave is an analyst-recognized leader in managed detection and response (MDR), managed security services (MSS), cyber advisory, penetration testing, database security, and email security.

• Series A
• 646 employees
• Founded 1995

Enterprise security is too complex, too costly, and too fragmented. Sequretek is changing that. Our Percept platform and products give organizations a single, AI-powered view of their entire threat landscape — continuously managing exposure across endpoints, identities, and cloud. We don't overwhelm you with alerts. We simplify security giving you clarity, control, and the confidence to run your business knowing your security never sleeps.We are a global cybersecurity company that provides AI-powered, cloud-native, simple-to-use solutions with comprehensive visibility and threat management in a single console. Built on the Percept continuous threat exposure management framework, our products Percept CTEM, Percept XDR & NG SIEM, and Percept Identity-offer defense in-depth and defense-in-breadth capabilities. Our AI technologies, processes, and expert teams ensure organizations’ IT assets are protected against cyberthreats, while helping them comply with regulatory standards. Our unwavering commitment to provide effortless cybersecurity with cost-effective solutions, empowers our customers to grow confidently while navigating the digital world.Sequretek was the only cybersecurity company to be in the top 20 at the AI for ALL: Global Impact Challenge, AI Impact Summit 2026, New Delhi. Sequretek is a winner of the TiE50 awards, India National Startup Awards, NASSCOM Emerge 50 awards, and made it to the Financial Times High Growth Asia Pacific companies. Sequretek was #50 on the Top 250 MSSPs by MSSP Alert 2025. We are recognized by leading global research & analyst firms.

• Series A
• 357 employees
• Founded 2013

Koi gives enterprises complete visibility and control over every piece of software - extensions, packages, apps, and AI models. By surfacing blind spots traditional tools miss, Koi helps security teams detect risks early, enforce policy, and protect endpoints without slowing innovation.

• Series A
• 202 employees
• Founded 2023