Cybersecurity Startups

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

Revel8 provides a security awareness platform that runs automated multi-channel social engineering simulations, including phishing, vishing, and deepfake-based attacks, using OSINT context to reflect current attack techniques. It offers real-time human threat signals, adjustable simulation campaigns, and audit-ready reporting aligned with ISO 27001 and NIS2 for organizations' IT and security teams.

1 investor

ReversingLabs provides a cybersecurity platform for software supply chain and file security, analyzing and deconstructing software binaries to detect risks. It serves enterprises including Fortune 500 companies and cybersecurity vendors across software, banking, defense, retail, and insurance sectors, with its Spectra Core tracking over 40 billion searchable files daily.

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

Rhebo provides OT (operational technology) security solutions, with a focus on protecting critical infrastructure such as water supply and wastewater systems from cyber threats. Its offerings target industrial and utility operators seeking to monitor and secure their operational networks.

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

Riscosity provides an automated platform for securing sensitive data in transit, detecting and controlling outbound data transfers across a company's tech stack. It targets businesses that need to prevent sending sensitive data to unauthorized endpoints, particularly in the context of AI usage.

1 investor

RiskImmune is an AI governance, GRC, and third-party risk management platform that discovers sanctioned and shadow AI tools used by employees, scores vendor risk from 200+ OSINT signals, and generates compliance evidence for frameworks like DORA, NIS2, and ISO 27001. It serves CISOs, GRC, IT security, procurement, and legal teams in financial services, fintech, healthcare, and critical infrastructure.

1 investor

RiskQ provides cyber risk quantification and third-party risk management solutions tailored to organizational needs.

1 investor

1 investor

Riverbank provides offensive security assessments using autonomous AI agents paired with human operators to identify vulnerabilities in organizational systems. The company targets the penetration testing market by using AI-driven approaches to discover issues that conventional vulnerability scanning tools overlook.

1 investor

Rock Solid Knowledge creates technology solutions for organizations seeking to achieve their business goals. The company operates as a certified B Corporation committed to social and environmental responsibility, including carbon neutrality and gender equality initiatives.

1 investor

Roe AI builds AI agents that investigate fraud, dispute, AML, KYC/KYB, and sanctions cases end-to-end, reading customer, transaction, and case data where it lives and producing cited, audit-ready dispositions and SAR narratives. It serves compliance and fraud operations teams at card networks, BNPL providers, marketplaces, and crypto companies, operating as a browser-based layer on top of existing tools with single-tenant VPC deployment.

1 investor

AI DR is a real-time detection and response platform that monitors and secures AI agent interactions by detecting and blocking threats such as prompt injection, data exfiltration, privilege escalation, and tool misuse. It is built for security teams to enforce policies and prevent attacks across complex AI workflows.

1 investor

Rogue is an anonymous blog covering operational security, technical experiments, and advertising technology topics related to the surveillance economy and ad fraud.

1 investor