Cybersecurity Startups

Proof of Human is an AI-powered verification service that uses behavioral biometrics to authenticate users in real time without CAPTCHAs. The platform analyzes typing patterns and user interactions to detect fraudulent and AI-generated responses, serving research organizations and enterprises that need to ensure data quality.

1 investor

Proof Authentication provides authentication technology used by large enterprise clients, including Fortune 500 companies. The site withholds product details, citing confidentiality.

1 investor

ProofID is an identity security consultancy that helps organizations manage secure access for workforce, customer, partner, and non-human (AI agent) identities across leading identity platforms. It provides implementation, governance, single sign-on, and identity governance and administration services, with client work spanning UK banking and higher education.

1 investor

ProofSpace provides user-centric identity credentials and verification infrastructure for the internet. The platform enables consumers and enterprises to manage reusable, verifiable identity credentials that protect users while improving enterprise operations.

1 investor

Property Shield protects residential real estate properties and users from online fraud and scams using AI and detection technology. The company serves the real estate industry by securing over 300,000 properties against digital threats in the rental and property marketplace.

1 investor

Prophet Security offers an agentic AI platform for security operations centers (SOCs), using a set of AI agents to autonomously investigate alerts, hunt threats, and optimize detection coverage. It serves enterprise security operations teams and integrates with existing security tools.

1 investor

Protent supplies video analysis software that detects escalating incidents and threat patterns in real time, enabling law enforcement and security personnel to prioritize responses and intervene early.

1 investor

Protexxa Defender is a platform that continuously monitors organizations for cybersecurity risks, threats, and vulnerabilities, providing personalized recommendations to individuals and organization-wide insights to reduce attack surface.

1 investor

Proton develops free and open-source privacy and security software including encrypted email, contacts, and VPN services. The company uses its technology and resources to defend digital freedom, internet access, and privacy rights globally, particularly for journalists, activists, and people living under authoritarian regimes.

1 investor

Protos Labs builds Protos AI, an agentic Adversary Risk Intelligence platform that analyzes threat feeds, vulnerability disclosures, and security signals to determine what a given threat means for a specific organization's assets, people, vendors, and data. Built alongside defense and intelligence teams with sovereign deployment and auditable outputs, it serves executives, boards, and security teams in regulated environments.

1 investor

AutoProof is a security verification platform that transforms static application security testing (SAST) findings into confirmed exploitability evidence and automated patch workflows for development teams. It reduces false positives and manual triage work by executing safe proof-of-concept tests in a controlled environment and integrating verified results with GitHub and GitLab.

1 investor

Provalus delivers managed IT services, business solutions, and professional support services, hiring talent from rural communities across the United States.

1 investor

Provenant builds open infrastructure for verifiable digital communications and branded calling, using cryptographic proof (vLEI, KERI, ACDC) to authenticate calls and messages and support fraud detection and regulatory compliance. Its Origin API platform serves telecommunications operators, enterprises, and sectors such as healthcare, financial services, government, and supply chain.

1 investor

Pruuvn provides infrastructure for verifying identity and validating trust in real time across organizations, vendors, and AI systems. The platform embeds continuous verification and accountability into interactions for enterprises operating in the agentic economy.

1 investor

Unisys is a global technology solutions company that provides IT services and infrastructure solutions to large enterprises and organizations. The company operates across multiple sectors including financial services, healthcare, government, and commercial industries.

1 investor

Puppet provides infrastructure automation and configuration management tools that help government agencies enforce security compliance, automate system hardening, and maintain audit readiness across on-premises and cloud environments.

1 investor

PureSight offers parental control software that helps parents protect children online, filtering inappropriate content such as pornography and monitoring exposure to harmful material and risky online challenges. The product targets families with children and teenagers.

1 investor

Qevlar provides an identity analysis engine integrated into security investigations that automatically analyzes user authentication behavior to detect credential-based attacks and compromised accounts. The platform uses behavioral baselines, rule-based detection, and AI to investigate identity signals across investigations regardless of alert type.

1 investor

QEYnet is developing a global quantum key distribution (QKD) network using microsatellites to enable ultra-secure, quantum-safe encryption key exchange. It targets security-conscious organizations with data that must remain protected long-term, operating in the space-based cybersecurity and satellite technology sector.

1 investor

QIZ provides a platform for managing cryptographic assets and preparing organizations for the transition to post-quantum cryptography. The company serves security leaders and enterprises navigating compliance and security challenges in cryptographic management.

1 investor

QLUUos is a sovereign AI platform that detects, tracks, and neutralizes unauthorized drone threats to critical infrastructure, running entirely on edge infrastructure without cloud dependencies. The system serves power plants, water treatment facilities, airports, and natural gas pipelines, using machine learning to predict threat trajectories and generate response options in real-time.

1 investor

Qodex is an autonomous AI agent that reviews code changes and runs API, UI, and security tests against a company's live application, turning filed bugs into runnable scenarios. It targets software engineering and QA teams, posting findings and status checks on pull requests using standard Playwright and HTTP scenarios that customers own.

1 investor

Periphery (Qomodo) provides a lightweight, architecture-agnostic security agent that installs at the point of device build and updates on-device as threats and regulations change. It hardens devices, detects breaches, and maintains regulatory compliance for critical infrastructure, defense, and AI infrastructure hardware.

1 investor

Qomplx is a research company that designs and develops technologies in cybersecurity, analytics, simulation, and artificial intelligence. It is based in Reston, Virginia.

1 investor