Cybersecurity Startups

Radiant Security offers an AI-powered Security Operations Center (SOC) platform that uses AI triage and research agents to investigate every security alert across attack surfaces such as endpoint, identity, network, cloud, and SIEM, escalating only significant cases with explainable reasoning. It also provides integrated response actions and built-in log management for enterprise security teams.

4 investors

RangeForce runs a cloud-based cyber range for solo and team cybersecurity exercising; acquired by Cyberbit in September 2025.

4 investors

RedSeal provides a platform for network visibility and cybersecurity compliance that maps and analyzes hybrid environments including on-premises and cloud infrastructure to identify vulnerabilities and attack pathways. The platform serves organizations seeking to reduce security risk and strengthen defenses through data-driven threat management and remediation.

4 investors

Rippleshot offers a cloud-based (SaaS) platform that uses machine learning and predictive analytics to help financial institutions detect card fraud, identify merchant data breaches, and manage fraud risk proactively. It serves banks of all sizes, from small banks to large institutions.

4 investors

Risk Ledger builds a third-party risk management platform that connects organizations to monitor and manage cybersecurity risks in their supply chains. The platform serves enterprises seeking visibility and control over supplier and vendor security.

4 investors

Runtime Verification provides high-assurance cybersecurity consulting based on formal methods for teams building software that cannot fail. It also develops verification tools for smart contract and Web3 development, including formal verification for Foundry, Solidity, and Soroban contracts, along with fuzzing, symbolic execution, and debugging tools.

4 investors

Salv builds an anti-financial-crime platform providing AML, KYC, and fraud detection tools, along with a network that connects organisations to fight crime collaboratively. It serves banks and fintechs.

4 investors

SCYTHE is a continuous Adversarial Exposure Validation (AEV) platform that emulates real adversary techniques (mapped to MITRE ATT&CK) against an organization's actual IT, cloud, and OT/ICS environments to validate that detection, alerting, and response controls work. It serves enterprise security teams—red, blue, and purple teams—integrating with EDR and SIEM platforms and offering both self-operated and managed engagements.

4 investors

Semgrep develops a code scanning platform that detects security vulnerabilities and code issues across multiple programming languages, integrated with CI/CD tools like GitHub and GitLab. The solution helps development teams automate secure code practices at scale.

4 investors

Sentinel is a blockchain-based protocol and SDK for building decentralized VPNs, where node discovery, sessions, payments, and bandwidth run on-chain across a network of independent node operators. It provides a white-label stack for developers to launch branded dVPN applications and for operators to host nodes and earn bandwidth rewards.

4 investors

ShardSecure provides agentless, file-level encryption and its patented Microshard technology to secure data across on-premises, cloud, and hybrid/multi-cloud environments for enterprises. Its platform defends against ransomware with self-healing data resilience and includes an MCP Secure Gateway that controls enterprise data retrieval for AI inference.

4 investors

SheerID provides an identity verification platform that instantly confirms whether consumers belong to specific communities—such as students, military, educators, and first responders—using over 200,000 authoritative data sources. It is used by brands to gate exclusive personalized offers, reduce offer abuse, and collect verified first-party data for loyalty programs.

4 investors

Shift5 provides an onboard operational technology (OT) platform that captures and analyzes data from vehicles, fleets, and weapons systems to deliver security monitoring, threat detection, and predictive maintenance insights. It serves defense and transportation operators in the United States, with capabilities such as RF-enabled GPS threat detection.

4 investors

SIGA provides OT (operational technology) cybersecurity that monitors raw electrical signals at Level 0 to detect malicious manipulation of PLC logic, sensor values, and false data injections in industrial processes. Its SigaML2 suite supports incident response for critical infrastructure operators such as power grids, water treatment, oil and gas, and building systems through process-level threat detection and decision support.

4 investors

Signaturit provides electronic signature, certified email and SMS, identity verification, and digital preservation tools for managing and legally validating document workflows online. Its products serve businesses looking to sign, deliver, and preserve documents with legal validity.

4 investors

Sinumy develops hands-free authentication technology, described as a first-of-its-kind in Japan and globally. The company builds this deeptech recognition/authentication technology and pursues partnerships and new business ventures around it.

4 investors

Siren is a data search and intelligence platform that connects disparate data sources and enables advanced queries on billions of records for national security, law enforcement, and corporate fraud investigations. The platform serves government intelligence agencies, law enforcement, and enterprise security teams to perform real-time analysis of unstructured data including classified and open-source intelligence.

4 investors

Slide builds an encrypted backup and disaster recovery (BCDR) platform, including its own hardware appliances, designed for managed service providers (MSPs). The product offers an open API, workflow automation, and search across devices, backups, and files.

4 investors

Smart Protection uses machine learning to detect and remove counterfeits, fraudulent ads, and brand impersonations across e-commerce platforms, social media, search engines, and apps. It serves brands worldwide with online brand protection, marketplace monitoring, and ad fraud takedown services on a flat-fee model.

4 investors

Smile ID provides AI-based identity verification using biometrics, device and network intelligence, and document verification against government databases. It serves banks, BNPL providers, and other businesses onboarding users in African markets such as Nigeria and South Africa.

4 investors

Socket is a developer-first platform that detects and blocks malicious packages in real time to protect organizations from software supply chain attacks. The platform secures the open source ecosystem used across technology, media, healthcare, and finance industries.

4 investors

Sola is a vendor-agnostic enterprise security platform that normalizes data from Cloud, Code, Identity, and SaaS sources into a single common framework. It provides a unified security context layer for organizations, with quick source connections and flexible deployment.

4 investors

SPLX offers a security platform for enterprise AI systems, covering automated red teaming, runtime protection against prompt injections and data leakage, governance and compliance mapping, and remediation. It helps organizations discover AI models, workflows, and MCP servers, uncover vulnerabilities, and align with regulatory frameworks.

4 investors

Sqreen provides runtime application security monitoring for enterprises, analyzing code execution in real time to protect applications, APIs, and microservices from attacks while maintaining performance.

4 investors