Cybersecurity Startups

Spin.AI provides SpinOne, a SaaS security platform combining cloud backup and recovery, ransomware detection, SaaS security posture management, and enterprise browser security across Google Workspace, Microsoft 365, Salesforce, Slack, and Atlassian. It serves mid-market to enterprise organizations, offering data protection, third-party app risk scoring, and browser-to-cloud governance.

3 investors

The stackrox.com domain now redirects to Red Hat's Advanced Cluster Security for Kubernetes, a Kubernetes-native security platform that provides vulnerability management, compliance checks, policy enforcement, and runtime protection across the container software development lifecycle. It serves DevOps and security teams securing containerized and Kubernetes-based workloads.

3 investors

Staex offers a single stack for secure machine-to-machine networking that captures edge data, encrypts and cryptographically verifies it, and surfaces real-time insights through AI agents. Built on its MCC Protocol and running on buses, telecom towers, and drone corridors, it serves mobility, industrial manufacturing, telecom, and energy operators, with deployments in Germany and Latin America.

3 investors

Stealth Worker is a marketplace platform connecting cybersecurity professionals with enterprises that need temporary or contract security expertise, including penetration testers, data protection officers, cloud security specialists, and sales engineers. The platform charges employers a management fee while offering freelance workers flexible engagement opportunities to supplement their income.

3 investors

Stoïk combines cyber insurance and security software to help companies manage and reduce their cyber risk exposure. The platform serves SMEs and mid-market enterprises through insurance brokers, offering both preventive security measures and comprehensive cyber liability coverage.

3 investors

Strac helps enterprises protect sensitive information during customer interactions by preventing data exposure incidents. The company builds security tools to enable secure handling of personally identifiable information without operational friction.

3 investors

Straiker builds security software for enterprise AI agents, offering agent discovery, autonomous red teaming for attack paths, and runtime protection across tools, data, MCP servers, and workflows. It serves security-sensitive organizations such as banks, healthcare providers, technology and AI companies, media, and retail deploying AI agents in production.

3 investors

Strike offers an always-on security platform that combines AI agents with human security experts to continuously map an organization's assets, run attack emulations, and support vulnerability remediation. It provides continuous hybrid penetration testing and attack surface management for enterprise security teams.

3 investors

Strise builds an automated financial-crime compliance platform that handles customer onboarding, continuous risk monitoring, ownership mapping, and alert triage for banks and large enterprises. The company serves Nordic tier-1 banks and S&P 500-listed companies, operating across Europe.

3 investors

Strivacity provides a Customer Identity and Access Management (CIAM) platform that governs access for customers, partners, and AI agents from a single product. It offers configurable identity journeys, APIs and SDKs, built-in data residency, and controls for what AI agents can access and act on.

3 investors

Super Protocol provides confidential computing infrastructure that lets organizations run multi-party AI inference and model fine-tuning across cloud and on-premise environments without exposing underlying data or models. It targets enterprises working with sensitive data and AI models.

3 investors

TACEO builds a privacy layer for public blockchains, offering composable primitives for confidential stablecoin payments, private treasury and DeFi operations, identity verification without exposing user data, and confidential transactions for AI agent commerce. The product targets developers building on existing chains, spanning payments, identity/credentialing, and agent-to-agent commerce.

3 investors

Teleskope offers a data security platform with a "Data Reasoning Layer" that discovers, classifies, and automatically remediates sensitive data exposure across an organization's environment. It targets security and compliance teams, controlling data reaching external AI tools and LLMs, managing data sprawl, and enforcing least-privilege access and retention policies.

3 investors

Tensec provides secure global payment and banking services by partnering with established financial institutions worldwide. Its AI-driven platform, built on AWS infrastructure, handles cross-border payments and automates compliance controls aligned with NIST SP 800-53 standards.

3 investors

Terra provides red teaming and offensive security testing for deployed AI systems, including models, copilots, chatbots, and agentic applications. The platform helps enterprise organizations validate AI systems for exploitable risks before adversaries can exploit them.

3 investors

TestMachine builds security infrastructure for Web3 protocols, using an AI agent (Azimuth) to detect vulnerabilities in smart contract code. It reports an 86.3% detection rate on the EVMBench benchmark and serves blockchain/protocol teams looking to audit and secure their projects.

3 investors

Theodosian provides data-centric security that encrypts files and applies dynamic access controls directly to the content rather than the network perimeter, keeping data protected even after it leaves corporate boundaries or when credentials are compromised. It targets both small and medium organizations and enterprises handling sensitive or regulated data, offering built-in compliance tooling, zero-trust support, and self-custody key management.

3 investors

ThreatX provides SaaS web application and API protection using behavioral risk profiling; acquired by A10 Networks in 2025.

3 investors

ThreatConnect (Dataminr for Cyber Defense) offers an intelligence-driven threat and exposure management platform that delivers real-time, client-tailored intelligence connecting emerging threats, internal exposure, and business impact. It serves security and cyber defense teams.

3 investors

ThreatMark offers a behavioral intelligence platform for fraud prevention that combines transaction risk analysis, threat detection, and user behavior profiling to detect scams, phishing, account takeover, and money mule activity. It serves financial institutions and digital banks, protecting their online users from social engineering and cyber fraud.

3 investors

ThreatMetrix provides real-time behavioral and device intelligence to detect fraud and recognize legitimate returning customers across the customer journey. It uses AI-driven risk scoring and automated identity authentication for risk management.

3 investors

TierPoint provides hybrid IT services including public, private, and multitenant cloud, colocation, disaster recovery, managed security, and data center services. It serves IT leaders and businesses in the United States seeking to manage cloud, infrastructure, and security across mixed environments.

3 investors

Token builds biometric hardware authenticators — including a security key, a wearable ring, and a portable stick — that combine on-device fingerprint matching with cryptographic proximity for passwordless enterprise access. Built on FIDO2/WebAuthn/U2F standards, it adds a human-verification layer on top of existing IAM, SSO, and PAM systems for high-security industries such as healthcare, insurance, aerospace and defense, critical infrastructure, and financial services.

3 investors

Tolmo develops autonomous security agents that continuously monitor and identify vulnerabilities in production applications at cloud scale. The platform serves security teams and engineering organizations to automate runtime security operations.

3 investors