Cybersecurity Startups

bunny.net operates a global content delivery network (CDN) and related edge infrastructure aimed at helping developers and companies deliver web content quickly and affordably. Founded in 2015 and headquartered in Europe, it serves over 85,000 customers worldwide.

2 investors

Byos develops a Zero Trust microsegmentation platform for edge networking that protects devices and networks across critical infrastructure, manufacturing, defense, government, healthcare, energy, and financial services by making assets invisible and preventing lateral movement without data leakage.

2 investors

Cakewalk is an access management platform that governs and secures access for both AI agents and human identities across a workforce, routing agent calls through a runtime policy gateway and provisioning access on demand. It offers audit trails, no-touch onboarding, Slack-native access requests, and access reviews aligned to compliance standards like SOC 2, ISO 27001, and ISO 42001.

2 investors

Calipsa provides cloud-based AI video analytics that connect to existing analog or IP cameras to detect threats, environmental hazards, loitering, safety risks, and camera health issues. It serves organizations and businesses seeking to add alarm-based detection and centralized monitoring to their security systems without onsite hardware.

2 investors

Camio turns standard 2D cameras into 3D sensors and applies AI video analysis to detect tailgating, verify alarms, and reduce false positives, integrating with access control systems such as Lenel Onguard, Openpath, Brivo, and C-Cure. This page targets biotechnology and pharmaceutical companies that need to secure sensitive areas and information.

2 investors

CAPSLOCK provides cyber security training and career support to help learners from various backgrounds retrain and move into roles such as analysts, consultants, penetration testers, and governance/risk positions. It offers structured support beyond the classroom, with alumni employed across 500+ organisations.

2 investors

Castlepoint provides AI-powered data governance solutions that help corporate clients manage cybersecurity risks and ensure secure information management across complex networks.

2 investors

Caution is a verifiable confidential compute platform that deploys sensitive workloads to secure enclaves and provides cryptographic proof that production code matches the reviewed source, build, and configuration. It currently runs on AWS Nitro Enclaves and serves high-assurance workloads such as AI model serving, healthcare data, key management, and blockchain node operation.

2 investors

Cavelo helps IT and security teams discover and manage data assets to reduce cybersecurity and data privacy risks. The company aims to make data security accessible to organizations of all sizes through simplified asset discovery and continuous security innovation.

2 investors

Cayosoft develops software for managing, monitoring, and recovering hybrid Active Directory and Entra ID environments, aimed at enterprise IT and security teams. Its products focus on identity management, continuity, and disaster recovery in Microsoft cloud and on-premises environments.

2 investors

CBRX is a consultancy that designs, tests and governs AI systems for European enterprises, ensuring compliance with EU regulations including GDPR, NIS2, DORA, the EU AI Act and ISO 42001. It combines AI engineering, cybersecurity and EU regulatory expertise to help organizations deploy AI safely in regulated industries.

2 investors

Cense provides automated crypto compliance due diligence for banks, collecting and normalizing wallet, exchange, and transaction data to reconstruct clients' digital asset portfolios and generate audit-ready reports. It serves relationship managers, compliance teams, and financial economic crime specialists who need evidence to assess Source of Funds/Wealth, verify ownership, and make defensible onboarding and review decisions.

2 investors

Centripetal operationalizes global threat intelligence from thousands of feeds combined with human analysis to detect and block malicious network traffic in real time at the network edge. Founded in 2009, it provides proactive threat prevention for enterprises and has worked with U.S. government agencies including the CIA, NSA, DHS, and DOD.

2 investors

Certes Networks provides data protection and encryption technology for security teams, with a focus on post-quantum cryptography readiness and safeguarding data. It operates in the cybersecurity industry.

2 investors

ChainPatrol is a brand protection platform that detects and removes phishing sites, fake domains, impersonating social media profiles, and app store listings targeting a company's brand, executives, and community. It combines automated scanning with human analysts to block malicious domains across 20+ crypto wallets and browsers and file takedowns, serving crypto and Web3 brands.

2 investors

Sift provides AI/ML-powered fraud prevention and risk management for digital marketplaces and consumer platforms, helping companies detect and prevent payment fraud, account takeover, and account abuse at scale.

2 investors

ChatSee provides infrastructure for monitoring, governing, and controlling autonomous AI agent behavior in production environments, addressing the gap between traditional software observability and the needs of enterprise AI systems.

2 investors

Churches Fire & Security provides fire safety and security installation, maintenance, and compliance services to UK businesses, supported by a nationwide network of trained technicians and certified assessors.

2 investors

Cimento is a human risk management platform that runs multi-channel phishing simulations (email, SMS, voice, and AI-generated deepfakes), delivers AI-generated micro-training, and assigns dynamic risk scores to employees, acting automatically to remediate high-risk behavior. It also tests deployed AI agents for social-engineering vulnerabilities and integrates with enterprise security stacks such as Okta, Azure AD, and Google Workspace.

2 investors

Cinchy provides a Data Collaboration Platform that integrates enterprise data across systems with governance controls, and offers PeriMind, a governance layer for AI agent access to enterprise systems. The company serves large enterprises in financial services, technology, and manufacturing.

2 investors

Ciphero provides a deterministic security layer that lets security teams observe, audit, and verify AI interactions across models, agents, and machines. Its engine combines proprietary verifiers (for prompt injection, malicious commands, secrets, and PII) with plain-English policies to inspect AI inputs, outputs, commands, and tool calls, and produce compliance-ready audit trails; its Orpheus product runs on endpoints to verify actions taken by coding agents like Claude Code, Codex, and Cursor.

2 investors

Circuit builds infrastructure for institutions to prevent loss of digital assets and enable recovery when loss occurs. The company provides risk management and resilience mechanisms for crypto and digital asset custodians, fund managers, and financial institutions.

2 investors

Citalid provides a cyber risk quantification platform that translates cybersecurity threats and vulnerabilities into financial metrics and monetary impact assessments for enterprise decision-makers. The platform enables organizations to assess the probability of cyber events, estimate financial losses, and communicate security risks in board-level terms using data-driven insights.

2 investors

Clarity Security provides an identity governance platform that uses Attribute-Based Access Control and automation to manage user access reviews, lifecycle management, and discovery of human and machine identities across cloud, hybrid, and on-prem environments. It serves enterprise cybersecurity teams.

2 investors