Cybersecurity Startups

Approach Cyber is a cybersecurity partner offering strategic advice, adaptive security, and continuous operations to help organisations achieve cyber resilience. It operates the AXS Guard platform for perimeter security and serves clients in Europe, including Belgium.

1 investor

AppSecAI automates the remediation of security vulnerabilities detected by multiple scanners, delivering validated fixes as pull requests within the development sprint. The platform serves product security teams and engineering organizations that need to resolve findings without holding releases.

1 investor

AppSentinels provides API and application security solutions that detect threats and protect sensitive data at enterprise scale. The platform serves businesses across industries that depend on secure APIs and applications.

1 investor

Aprovall specializes in third-party risk management software, offering a pay-to-collect model that connects a global network of over 430,000 third parties for enterprise compliance and onboarding.

1 investor

Aranas offers intelligent document processing solutions for businesses, covering digitization, classification and data extraction, along with enterprise content management (ECM), digital signature, facial authentication, RPA automation, and cybersecurity auditing (ISO 27001, GDPR). It provides system integration and business management tools aimed at automating processes and improving operational efficiency across sectors.

1 investor

Resilience provides cyber insurance and Tech E&O coverage alongside a risk-management platform that quantifies cyber risk using claims data to produce dollar-based action plans. It serves organizations across industries including healthcare, financial services, manufacturing, and education, offering portfolio risk visibility and security program justification.

1 investor

Arcfield provides mission-critical defense and space engineering services, cybersecurity solutions, and intelligence operations support to U.S. government and allied agencies. The company operates across surface/undersea warfare, hypersonic defense, space systems, and federal civilian cybersecurity, with a workforce of 2,200+ employees across 18 global locations.

1 investor

Argon provides software supply chain security that connects to existing CI/CD pipelines via an agentless implementation to map development environments, assets, code, and user activities, and uses code-tampering detection to prevent supply chain attacks. The company serves enterprises securing their software build and release process, and was acquired by Aqua Security.

1 investor

ARGOS provides a Know Your Customer (KYC) and identity verification platform that combines document recognition, biometric matching, and fraud detection into a single console. The service supports 200+ countries and reduces operational costs while improving verification accuracy for fintech and regulated businesses.

1 investor

PlaxidityX offers vCore, a unified vehicle cybersecurity system that integrates in-vehicle sensors, edge management, and cloud analytics to detect, prevent, and respond to threats across connected vehicle fleets for OEMs. The platform reduces cellular data usage and cloud costs while providing fleet-wide visibility through AI-powered threat detection and rapid security rule deployment.

1 investor

Ariesline is an AI-first managed service provider that delivers managed IT services covering software and hardware, including security, backups, and on-site support. It serves modern, growing companies with 10–300+ employees, including distributed and remote teams, that need enterprise-grade IT without a large internal department.

1 investor

Ario provides marketing teams access to shoppers' cross-retailer purchase data, enabling personalized offers and competitive campaign strategies informed by what customers actually buy at competitors. The platform connects to purchase accounts to reveal buying patterns across multiple retailers, supporting customer targeting and loyalty optimization.

1 investor

Armor provides cloud-native cybersecurity solutions including managed detection and response, compliance automation, and threat protection across multi-cloud environments. The company serves organizations across healthcare, financial services, and other regulated industries worldwide.

1 investor

Armur AI builds a swarm of autonomous AI agents designed to perform coordinated security testing and penetration testing on cloud infrastructure, APIs, and web applications. The platform chains vulnerabilities across multiple attack surfaces the way human attackers would, with reasoning that is auditable and reproducible.

1 investor

Arrcus transforms networking infrastructure through cloud-native, autonomous solutions designed to make networks agile, elastic, and intelligent. The company serves networking and infrastructure teams seeking modern, scalable alternatives to legacy systems.

1 investor

Arrowheads develops cybersecurity, AI, and intelligence solutions for corporations and government agencies in Japan. The company provides cyber defense systems for critical infrastructure, AI system design and implementation, and OSINT-based intelligence services.

1 investor

Arsen provides AI-driven phishing, smishing, and vishing simulation and awareness training for enterprise security teams. The platform helps companies test employee resilience to social engineering attacks and comply with regulatory requirements.

1 investor

Artemis is an AI-native security operations platform that builds a live model of an organization's environment across identity, cloud, endpoint, and SaaS to detect, investigate, and respond to attacks autonomously. It serves enterprise and startup security operations centers (SOCs), positioning itself as a replacement for legacy SIEM tools.

1 investor

Artiphishell develops AI-driven security tooling that uses LLMs to automatically find, analyze, and patch software vulnerabilities, drawing on techniques such as guided fuzzing, symbolic execution, and binary analysis. The product is built from research the founding team ran during DARPA's AI Cyber Challenge.

1 investor

ASE Tech provides secure, scalable, and custom IT solutions to help businesses adapt and remain competitive in the digital landscape. The company works with businesses across various sectors requiring bespoke technology implementations.

1 investor

Asenion builds an AI governance and compliance platform that converts regulatory requirements (such as the EU AI Act, ISO/IEC 42001, NIST AI RMF and OSFI E-23) and organizational policies into context-aware, machine-executable controls, then assesses, verifies and monitors AI models, copilots and agents against them with audit-grade evidence. It serves security, compliance and GRC teams, and also licenses its compliance content and controls to GRC and AI governance platform vendors through a partner program.

1 investor

Aserto provides a fine-grained, resource-level authorization platform that developers integrate into applications via SDKs, middleware, and gRPC/REST APIs, with a central control plane and local authorizers for real-time access decisions. It offers audit trails and compliance support, and is built on open-source foundations including the Topaz authorizer, Open Policy Agent, and a Google Zanzibar-inspired directory.

1 investor

Assac Networks provides cybersecurity solutions including ShieldiT, a platform for endpoint security that addresses hacking and wiretapping threats, managed through a ManageiT dashboard for corporate clients.

1 investor

Assail develops Ares, an AI-powered offensive security platform that continuously discovers, maps, and exploits vulnerabilities in mobile and API infrastructure to provide validated evidence of actual attack risk. The platform serves enterprise security teams seeking proof of exploitable vulnerabilities rather than theoretical risk scores.

1 investor