Top Cyber Security Startups in 2026

Opal Security is intelligent access management that empowers enterprises to move fast while staying secure. Our mission is to bring clarity, control, and confidence to complex enterprise environments, helping teams govern access without slowing down innovation.

MedCrypt is obsessed with medical device cybersecurity. We are laser focused on bringing proactive, leading-edge cybersecurity features to both legacy and next generation medical devices to make them as safe and secure as technologically possible. Building security into medical devices should not be a burden. MedCrypt works directly with medical device manufacturers (MDMs) to bring security features to medical devices-from pacemakers to surgical robots-simply in a few lines of code. This strong collaboration with MDM application developers and security engineers makes it efficient, easy and less expensive to build secure medical devices.

We are a global QA services and IT audit firm helping scaling SaaS companies across HealthTech, Fintech, and EdTech release with confidence. From functional and performance testing to security audits and compliance readiness, we embed into your engineering lifecycle and make sure what ships is what you intended. Our credentials aren't a marketing checkbox — they reflect how seriously we take the work. We hold TMMi Level 5, ISO 9001, ISO 27001, and SOC 2 certifications, placing us among the most rigorously validated QA firms in the industry. We work with CTOs, VPs of Engineering, and engineering leaders who understand that a single bad release can cost more than a year of QA investment. Our job is to make sure that release never happens. Headquartered globally with a growing US presence, Kualitatem brings enterprise-grade quality assurance to companies that are scaling fast and can't afford to slow down to fix what should have been caught earlier. Quality isn't what we do. It's how we think.

ZeroFOX, the market leader in digital visibility and protection, safeguards modern organizations from dynamic security, brand and physical risks across social, mobile, web and collaboration platforms. Using diverse data sources and artificial intelligence-based analysis, the ZeroFOX Platform identifies and remediates targeted phishing attacks, credential compromise, data exfiltration, brand hijacking, executive and location threats and more. The patented ZeroFOX SaaS technology processes and protects millions of posts, messages and accounts daily across the social and digital landscape, spanning LinkedIn, Facebook, Slack, Twitter, Instagram, Pastebin, YouTube, mobile app stores, the deep & dark web, domains and more.

Wallarm provides its AI-based application security solution to hundreds of enterprises and SaaS providers worldwide. Wallarm's hybrid architecture makes it uniquely suited for cloud applications and micro-services. Unlike legacy WAF solutions which require signatures and manual configuration of security rules, Wallarm uses machine learning to analyzes traffic and creates adaptive security rules to protect both applications and APIs. To help make security more manageable, Wallarm supplements passive protection with active verification of vulnerabilities to distinguish exploitable incidents from noise. Wallarm is a privately held company head-quartered in Menlo Park, California and backed by Y-combinator, Partech Ventures and other prominent investors.

DataDome stops cyberfraud and bots in real time, outpacing AI-driven fraud from simple to sophisticated across your sites, apps, and APIs. Named a Leader in the 2024 Forrester Wave for Bot Management, the DataDome platform is built on a multi-layered AI engine that focuses on intent, not just identity. Because it’s not about knowing who’s real, it’s about what they intend to do. With thousands of AI models that adapt to every fraudulent click, signup, and login, DataDome blocks fraud in less than 2 milliseconds, without compromising performance. DataDome is fully automated and integrates seamlessly into any tech stack. Backed by a 24/7 SOC team of advanced threat researchers, DataDome stops over 400 billion attacks annually. Experience protection that outperforms with DataDome.

Atomus is building cybersecurity for the world’s most critical companies. Instead of these companies building their own cybersecurity they onboard to our cybersecurity infrastructure. Examples of our commercial customers include hypersonic aircraft companies, satellite and space mission systems companies, AI and software companies, among many others. We are on a mission to bring industry leading cybersecurity to every business starting with the Aerospace and Defense industry. You get to work for some of the most exciting teams building some amazing technology for the DoD, and be on the frontlines for them.

Today, the Nord Security family of products is used by over 15 million people. NordVPN holds the title of the world’s fastest VPN, while NordPass and NordLocker are fast gaining recognition among the tech crowd. Over less than a decade, we have grown from 4 friends to hundreds of cybersec experts — and we don’t plan on stopping.

Kaseya is the leading provider of complete IT infrastructure management solutions for Managed Service Providers (MSPs) and internal IT organizations worldwide. Kaseya’s best-in-breed technologies allow organizations to efficiently manage and secure IT to drive sustained business success. Kaseya has achieved sustained, strong double-digit growth over the past several years and is backed by Insight Venture Partners (insightpartners.com) and TPG (tpg.com), two of the leading global private equity firms investing in high-growth technology and software companies that drive transformative change in the industries they serve. Founded in 2000, Kaseya currently serves customers in over 20 countries across a wide variety of industries and manages over 10 million endpoints worldwide. To learn more about our company and our award-winning solutions, and company culture go to Kaseya.com

Andersen is an international custom software development company that specializes in building high-quality, bespoke software solutions for our clients. We have a team of experienced and talented engineers who are passionate about their work and committed to delivering the best possible results for our clients. We believe that custom software development is the best way to achieve the specific goals and objectives of our clients. We take the time to understand our client's needs and requirements and then build a solution that is tailored to their specific needs. This allows our clients to get the most out of their investment and ensures that they are able to achieve their desired results. If you are looking for a custom software development company that can help you achieve your goals, then please contact us today. We would be happy to discuss your specific needs and requirements and provide you with a proposal for our services.