Cybersecurity Startups

OneXillium offers red teaming and penetration testing services that simulate realistic cyberattacks—including physical intrusion tests and black-box penetration tests—to identify vulnerabilities in an organization's people, processes, and systems and assess its detection and response capabilities. It serves organizations with sensitive data and compliance requirements such as housing corporations, financial services (DORA), government, and trade and industry.

1 investor

Onlykit is a voice intelligence platform that deploys AI-powered voice agents for enterprise training, threat simulation, and call process automation. It targets enterprise security teams with features like threat detection, compliance monitoring, and voice interaction analytics, and integrates with on-premises, cloud, or hybrid infrastructure.

1 investor

Parallel provides a tool to simplify information collection from customers by automating requests and reducing the friction of gathering documents and details needed to begin work engagements. The platform targets professionals and service-based businesses that frequently need to collect multiple pieces of customer information.

1 investor

OnSecurity provides AI red teaming and penetration testing services to identify vulnerabilities in large language models and AI-powered applications. The company combines manual expert testing with automation to uncover prompt injection attacks, data leaks, API weaknesses, and unsafe model behaviors in AI systems.

1 investor

Ontology is a blockchain platform that provides decentralized identity (DID) solutions, smart contract capabilities, and interoperable infrastructure for Web3 applications. The platform serves developers and enterprises building blockchain systems, offering tools like the EVM, Layer 2 scaling, staking mechanisms, and identity verification services.

1 investor

Onwelo publishes content on software supply chain security topics, including assessing third-party code dependencies and compliance with regulations such as the Cyber Resilience Act. The available page is a blog article rather than a full company overview.

1 investor

Opacity Labs offers a one-time, bank-grade KYC identity product intended to give global investors access to capital markets, and references SEC exemptive relief for AMM trading of tokenized securities. The company operates at the intersection of financial services, identity verification, and blockchain-based securities.

1 investor

Circuit is a security response platform for digital assets that automatically moves or sweeps crypto assets to pre-approved vaults when wallets are compromised, inaccessible, or systems fail. Aimed at institutions, it connects to wallet stacks such as MPC, Multisig, and HSM without holding users' private keys.

1 investor

Opefin ingests a firm's AML programme and risk matrix and turns it into a live risk-scoring engine that reconciles client source-of-funds declarations against bank data pulled via Open Banking. It handles scoring, sanctions and adverse-media screening, RFIs, and sign-off in a single auditable case record for compliance teams and MLROs at regulated reporting entities.

1 investor

OpenMake Software makes Meister, a build automation tool that produces repeatable, secure software compiles using a declarative model, with features such as SBOM build audits, dependency scanning, build acceleration, and CI/CD integration. Aimed at large enterprises and originally serving the financial sector, it addresses software supply chain security within the DevOps ecosystem.

1 investor

OpenCyber AI develops a gamified cybersecurity learning platform for educational institutions and students. The company has gained recognition within the European education and cybersecurity ecosystems, including selection in Google for Startups' AI for Education cohort.

1 investor

OpenHack is an AI security engineer that scans code, runs autonomous pentests, verifies vulnerabilities with working proof-of-concept exploits, and prioritizes findings by business impact, generating fix pull requests. It serves engineering teams at startups and enterprises, covering application code, authentication flows, APIs, dependencies, and secrets.

1 investor

Openi Analytics turns public, proprietary, and commercially available data into strategic intelligence using lawful OSINT, analytics, and AI-assisted workflows reviewed by human analysts. It serves governments, enterprises, and select institutional clients seeking to understand and reduce digital risk and exposure.

1 investor

OpenMSP is a directory and community platform cataloging open-source software alternatives for managed service providers (MSPs), with vendor pricing comparisons and implementation guides across IT, network operations, security operations, and business operations. It aims to help MSPs reduce software costs and includes tools such as a stack builder and community initiatives.

1 investor

Opera is an agentic security operations platform designed for cyber-physical environments, providing security capabilities for physical and digital security integration.

1 investor

Oplane builds continuous architectural threat modeling software for AI-first engineering teams, automating security analysis that runs alongside code changes rather than as periodic reviews. The platform is designed for development teams shipping features daily, particularly in environments where AI agents and AI-generated code introduce new security risks.

1 investor

Opsin offers an AI agent security platform that correlates an agent's intent with user activity, behavior, data access, and tools to detect risks that traditional security tools miss. The platform provides visibility, detection, prioritization, and response capabilities for enterprise AI deployments.

1 investor

Optic Digital is a division of Optic Security Group that provides IT and security professionals and services to business clients, including client relationship management and HR/resourcing to match talent to customer needs. It operates in New Zealand.

1 investor

Optimal Networks is a managed IT service provider offering outsourced technology support, help desk, security training, and virtual CIO advisory services. It serves legal, association, and consulting firms with a fixed monthly pricing model.

1 investor

Options provides managed trading infrastructure and cloud-enabled services to capital markets firms including investment banks, hedge funds, and trading companies globally. The company operates a 24/7 support model across 13 cities with investment-bank-grade cybersecurity compliance.

1 investor

Matters is an AI-native data security platform that protects sensitive data across cloud, SaaS, endpoints, and on-premises systems using context and intent modeling with automated decision-making. It serves fast-growing companies and global enterprises.

1 investor

Opus Guard offers Content Retention Manager, an app built on Atlassian Forge that automates data retention, classification, litigation holds, and defensible deletion across Confluence and Jira. It targets regulated and enterprise clients and their legal/litigation teams needing governance, audit logs, and compliance with frameworks like SOC 2, ISO 27001/42001, SEC and FINRA.

1 investor

Orchestra Group develops cybersecurity solutions for businesses, nonprofits, and governments. The company offers two main products: Harmony Purple for continuous threat exposure management and vulnerability assessment, and Harmony IoT for securing wireless and IoT networks.

1 investor

Orchid provides an identity-first security orchestration platform that discovers enterprise applications, assesses their identity and access flows to surface exposure, and enables remediation to strengthen an organization's identity security posture. It uses large language models to interpret application instructions and make fragmented identity behavior across IAM, applications, infrastructure, and code observable for enterprise identity teams.

1 investor