Cybersecurity Startups

RedSeal provides a cybersecurity and compliance platform that maps and analyzes hybrid networks—spanning on-premises, public, and private cloud environments—to give organizations visibility into their attack surface, vulnerabilities, and lateral attack paths. It helps security teams prioritize threats, enforce policies, and reduce risk through continuous network mapping and data-driven analytics.

1 investor

RedShield provides a managed web application security service that "shields" vulnerabilities in apps and APIs by rewriting requests and responses at the application layer to fix flaws in real time without code changes. It serves organisations in government, financial services, and critical infrastructure to close the gap between vulnerability discovery and remediation.

1 investor

Red Sift provides email authentication and brand protection tools that help security teams implement and enforce DMARC, SPF, DKIM, and related protocols to prevent phishing and domain impersonation attacks.

1 investor

Puppet provides an infrastructure governance platform that uses policy-driven automation to manage security, compliance, and configuration across servers, networks, cloud, and edge for enterprises. It is aimed at large organizations that need consistent, automated IT infrastructure management.

1 investor

Reflectiz provides an agentless security platform that continuously monitors client-side web activity to detect and prioritize security, privacy, and compliance risks for organizations across financial services, e-commerce, and healthcare.

1 investor

Reflex is an incident response readiness platform that uses AI agents to build adaptive cybersecurity crisis simulations from a company's real environment, replacing traditional slide-based tabletop exercises. It lets security, legal, and executive teams rehearse breach response under live pressure and generates automatic after-action reports assessing the team's performance.

1 investor

RegLab provides software and services for automated Wwft (Dutch anti-money laundering) compliance and client onboarding, including client identification, screening against PEPs, sanctions, watchlists and adverse media, and audit trails. It serves tax advisors, lawyers, and investment institutions.

1 investor

Reinforce Labs provides a platform that tests enterprise AI systems—including chatbots and agents—by simulating real and adversarial users to find failure modes, generates failure-derived datasets to fix those gaps, and monitors the systems in production. It also offers forward-deployed engineers who design, build, evaluate, and ship production AI agents for companies that lack in-house ML/AI capacity.

1 investor

Rein provides security solutions designed specifically for enterprise agents, offering execution context-aware protection that operates at the agent runtime level rather than through traditional network gateways or proxies.

1 investor

Remote Threat provides offensive cybersecurity operations platform designed for both human and machine users in a new operational paradigm.

1 investor

Respect Network provides digital forensics and investigation services for individuals and organizations targeted by online harassment, impersonation, coordinated attacks, and anonymous threats. The company analyzes digital evidence, online behavior, and technical indicators to identify malicious actors, preserve evidence, and support legal escalation.

1 investor

RiskImmune is an AI governance and GRC platform that discovers both authorized and unauthorized AI tools used across an organization, scores them for risk using open-source intelligence signals, and generates compliance evidence for DORA, NIS2, ISO 27001, and other regulatory frameworks. It serves CISOs, GRC teams, and security personnel in financial services, fintech, healthcare, and critical infrastructure organizations.

1 investor

Responsiv offers an AI-powered regulatory intelligence platform that monitors thousands of regulatory sources across more than 50 jurisdictions, alerts users to relevant changes, identifies compliance gaps, and maps requirements to policies and controls. It serves regulatory and compliance professionals with tools for obligations registers, requirement tracking, remediation workflows, and sourced regulatory research.

1 investor

Restrata provides a people risk management platform that combines workforce location data, threat intelligence, and incident response workflows to help organizations protect, locate, and support their employees globally. The solution consolidates fragmented data from HR systems, travel platforms, access control, and mobile devices into a unified operational picture.

1 investor

REVO is an insurance group offering coverage for emerging risks, including Cyber, Technology Professional Indemnity, and Digital Risks for technology companies, software houses, system integrators, cloud providers, and cybersecurity firms. It underwrites and manages these risks using digital tools and AI to support its assessment and underwriting processes.

1 investor

Revyz builds enterprise-grade tools for Atlassian Cloud administrators, providing configuration deployment management and data protection (backup) for Jira and Confluence environments. The company was acquired by data security firm Spin.AI in 2026, extending SaaS data protection and configuration management across Atlassian, Google Workspace, Microsoft 365, Slack, and Salesforce.

1 investor

Rezliant (trading as Maestro) provides autonomous security services for payment gateways, ledger databases, and open banking APIs, using intelligent automation to identify and remediate vulnerabilities in financial infrastructure.

1 investor

Rhizome Labs develops task-specific AI models that can run locally, protect sensitive data, and remain reliable in privacy-sensitive, industrial, and operationally demanding environments. The company focuses on open-source research for trustworthy, adaptive AI systems with human oversight.

1 investor

Richey May is a professional services firm offering accounting, tax, advisory, and mortgage banking services to clients across multiple regions. The firm serves businesses and individuals through specialized practices including alternative investments, tax planning, and financial advisory services.

1 investor

RightCrowd builds physical access control software that integrates HR, learning management, and security systems to verify that employees have required approvals and training before accessing facilities. The platform serves organizations managing access to critical assets across multiple locations, with a focus on compliance, safety, and zero trust security principles.

1 investor

Rilevera builds a platform that uses AI to assist detection engineering teams in creating and managing security rules, enabling organizations to achieve comprehensive threat coverage without sacrificing rule quality.

1 investor

Rilian builds Caspian, an agentic security orchestration platform that unifies a fragmented security stack through a single interface and captures practitioner expertise, alongside DawnTreader, a deployment engine for air-gapped, sovereign, and compliance-restricted environments. It serves security operations teams, including those defending OT/ICS and critical infrastructure in mission-controlled and classified settings.

1 investor

Rimward provides an AI-powered software layer that converts existing CCTV surveillance into intrusion and theft detection alerts for remote outdoor sites like solar farms. The platform works read-only on installed cameras without requiring hardware replacement and is tuned specifically for copper theft prevention and perimeter security at monitored technical sites.

1 investor

Riphean Investments is a sector-focused private equity firm using a venture studio model to provide growth capital and shared services (financial, business administration, and go-to-market support) to companies serving national security. It invests in early and late-stage companies in cyber, defense, intelligence, security, and private sector IT.

1 investor