Cybersecurity Startups

Secfense provides a platform that adds phishing-resistant multi-factor authentication, passkeys, passwordless login, and infrastructure exposure control to enterprise applications without changing application code or replacing identity systems. It serves enterprises such as banks and insurers protecting users, customers, legacy and modern apps, and exposed services like VPN, Citrix, and OWA.

3 investors

S32 is a venture capital firm that makes concentrated, high-conviction investments in a small number of companies, focusing on areas such as artificial intelligence, computational biology, physical AI, infrastructure, cybersecurity, and enterprise. It also provides hands-on hiring support across engineering, AI, and go-to-market functions.

3 investors

Securly builds digital safety and security solutions for K-12 schools to protect students and support educators. The platform aims to create safe learning environments by addressing threats like violence, self-harm, bullying, and learning distractions.

3 investors

Securonix develops a security analytics and operations management platform designed to help organizations detect and respond to advanced cyber threats at scale. The platform serves enterprises managing large volumes of security data in modern threat environments.

3 investors

Seemplicity offers an AI-driven exposure and remediation management platform that aggregates and deduplicates security findings across tools, prioritizes risks, and automates remediation workflows for enterprise security teams. It integrates with existing tools to route work and coordinate remediation, processing large volumes of findings at enterprise scale.

3 investors

SensCy provides cybersecurity guidance and risk-management services for small and medium-sized organizations, including third-party vendor risk assessment and employee education. The Ann Arbor-based company offers managed cyberhealth support through personal advisory, technology, and referrals.

3 investors

Sensity AI develops deepfake detection technology that identifies synthetically generated or manipulated images, videos, and audio by using deep learning to detect pixel-level and acoustic artifacts left by generative AI. Its forensically robust analysis is aimed at states, organizations, businesses, individuals, and law enforcement handling cases of fraud, harassment, and abuse.

3 investors

Sentra provides data governance and visibility solutions that help enterprises understand and control what data their AI systems can access and potentially expose.

3 investors

SEON provides a fraud prevention and AML decision-making platform that uses real-time first-party data signals and an AI rules engine to detect fraud and automate compliance across the customer journey. It serves businesses in fintech, payments, eCommerce, and iGaming.

3 investors

Sevco Security, now part of Arctic Wolf, provides an exposure management platform (branded Aurora) that discovers an organization's full attack surface, prioritizes vulnerabilities and misconfigurations by risk, and guides remediation. It offers vulnerability management and attack surface management for enterprise IT and security teams.

3 investors

Sicura automates security compliance and control management for organizations across government and enterprise. The platform helps teams accelerate compliance processes like Authority to Operate (ATO) and deploy infrastructure securely.

3 investors

Simbian builds an AI-driven security operations (SecOps) platform that uses autonomous AI agents to investigate alerts, run threat hunts, conduct penetration tests, and manage network and firewall operations for enterprise and MSSP security teams. The platform is designed to defend against AI-powered cyberattacks while automating existing SOC workflows.

3 investors

Sitehop provides hardware-enforced, FPGA-powered encryption solutions for data in motion, delivering quantum-ready security with ultra-low latency for telecommunications, critical infrastructure, financial services, and enterprise networks.

3 investors

Manage shadow IT and securely enable sanctioned IT with unparalleled cloud visibility, threat detection, and policy enforcement.

3 investors

SkySafe builds airspace security and drone defense technology that lets organizations detect, analyze, and respond to unauthorized drone activity. Its systems draw on hardware security, reverse engineering, digital signal processing, and software-defined radio, serving government and commercial customers.

3 investors

Smyte provides fraud and abuse detection services to online marketplaces and social platforms, using automated classification to identify and block spam, scams, harassment, and payment fraud.

3 investors

Software Defined Automation provides a platform for industrial operations that manages factory automation and control systems with AI-driven insights and built-in OT (operational technology) security. It serves manufacturing enterprises looking to centrally manage, monitor, and secure their industrial automation infrastructure.

3 investors

Sonet provides a browser-based governed workspace that gives both human employees and Vision AI agents secure, zero-trust access to enterprise applications, including legacy Windows tools, on-prem systems, and SaaS platforms without APIs. It targets enterprise IT teams needing unified access controls, DLP, and audit trails, and offers a pharmacy-specific Vision Agent (PAT) for regulated pharmacy operations.

3 investors

Sonrai Security provides a cloud permissions management platform that enforces least privilege access across cloud identities and services. The solution is designed for security teams to reduce access risk while enabling seamless collaboration with DevOps and cloud operations teams.

3 investors

SoSafe offers a Human Risk Management platform that combines security awareness training, multi-channel phishing simulations, threat reporting, and human risk monitoring to change employee security behaviour. Built on behavioural science, it serves organisations seeking to meet compliance frameworks such as NIS2, DORA, and ISO 27001, with EU hosting and GDPR compliance.

3 investors

Sotero provides real-time data protection and exfiltration detection for enterprise organizations. The company focuses on security solutions that prevent unauthorized data extraction attacks.

3 investors

SpaceComputer is a distributed satellite network providing censorship-resistant computation and verifiable settlement across Earth and orbit, using satellite-hosted trusted execution environments (TEEs), confidential smart contracts, and quantum-hardened cryptography. It offers space-based confidential compute infrastructure with developer-friendly APIs for integrating security services into enterprise solutions.

3 investors

SpeQtral develops quantum key distribution technology for secure communications, offering both satellite-based and fiber-optic terrestrial solutions to protect critical infrastructure against quantum computing threats. The company serves telecommunications providers, governments, healthcare, and financial institutions seeking quantum-safe networks.

3 investors

Spikerz provides social media security software for PR and communications teams, offering account takeover protection, AI comment moderation, permissions management, and impersonator takedown. It helps brands protect their social media accounts and manage reputation by detecting threats, moderating abusive comments, and controlling account access.

3 investors