Cybersecurity Startups

Silmaril is a security monitoring and threat detection platform that protects enterprise systems by identifying and blocking malicious tool calls and prompt injection attacks.

3 investors

RSA provides an AI-powered unified identity platform for organizations to manage authentication, access control, identity governance, and lifecycle management. The platform helps secure remote and hybrid work environments while maintaining compliance and reducing cybersecurity risks.

3 investors

Six Degrees is a UK provider of secure cloud platforms and business resilience services, helping organisations protect their operations and support innovation and growth. It focuses on cloud security and business continuity for UK-based organisations.

3 investors

SixMap provides a cyber defense platform that discovers digital assets across IPv4 and IPv6 using its 6Gen computational mapping algorithm and continuously scans all ports on each host to identify exposures. It serves public sector organizations and private enterprises with attack surface intelligence for risk mitigation.

3 investors

Manage shadow IT and securely enable sanctioned IT with unparalleled cloud visibility, threat detection, and policy enforcement.

3 investors

Sliderule is a no-code platform that allows non-technical users to build decision logic workflows using drag-and-drop rules, data connectors, and analytics. It enables businesses to automate customer service tasks and integrate workflows via a single API.

3 investors

Smallstep provides a Device Identity Platform that secures access for humans, devices, workloads, AI agents, and MCP-based toolchains using hardware-backed, short-lived certificates and mTLS instead of static API keys. It co-developed the ACME Device Attestation standard and targets enterprise security and DevSecOps teams implementing Zero Trust for devices.

3 investors

Smyte provides automated classification of website and mobile app event data to detect and stop bad actors, including spam, scams, harassment, and credit card fraud. It serves marketplaces and social networks.

3 investors

Infoblox describes its workplace culture and commitment to employee inclusion, community, and belonging.

3 investors

Software Defined Automation provides a platform for industrial operations that manages factory automation and control systems with AI-driven insights and built-in OT (operational technology) security. It serves manufacturing enterprises looking to centrally manage, monitor, and secure their industrial automation infrastructure.

3 investors

Sonet.io provides browser-based remote access and application delivery as an alternative to traditional virtual desktop infrastructure (VDI) solutions. The platform serves IT teams seeking to simplify infrastructure management and reduce licensing complexity.

3 investors

Sonoma provides a governance platform for enterprise deployments of AI agents built on the Model Context Protocol (MCP), offering a self-service MCP catalog, workflow builder, entitlement policies, audit logging, and security controls such as supply chain scanning and prompt injection protection. It targets enterprise security and IT teams in industries including finance, healthcare, retail, and manufacturing.

3 investors

SoSafe provides security awareness training powered by behavioral science to help organizations reduce human risk and build resilient security cultures. The platform serves security professionals and enterprises globally, using psychological techniques to drive behavioral change and compliance.

3 investors

Sotero provides real-time data protection and exfiltration detection for enterprise organizations. The company focuses on security solutions that prevent unauthorized data extraction attacks.

3 investors

SourceDNA offers a software similarity web service that scans iOS and Android apps to analyze their code for quality, origin, and intent, matching code and finding variants across platforms. It targets app developers and aims to bring transparency to the app stores.

3 investors

Sourcery provides automated code review and security scanning tools that integrate with developer workflows to catch vulnerabilities, logic errors, and security gaps in code from initial writing through merge. The platform is designed for teams working with AI-generated code and operates across GitHub, GitLab, and IDEs.

3 investors

Soyio is a platform for managing companies' relationships with their users' personal data in a traceable, secure, and regulation-compliant way, generating auditable evidence for each consent, update, or request. It offers modular tools covering the data lifecycle, including consent management and identity verification via document validation, biometrics, and authentication.

3 investors

Sparsity offers Nova, a platform for deploying applications to AWS Nitro Enclaves (trusted execution environments) with on-chain verification, taking code from GitHub to a running enclave. It targets developers building trusted, verifiable applications such as chatbots, oracles, key management, and private compute.

3 investors

Speakeasy provides an enterprise control plane for AI that lets companies securely manage and distribute MCP servers, skills, and AI assistants with fine-grained permissions, threat detection, and observability. It offers centralized governance, data-leak prevention, integrations with SaaS tools and identity providers, and usage analytics for organizations rolling out AI to their teams.

3 investors

Spektion is a vulnerability management platform that analyzes software in an organization's environment to determine what is actually exploitable, factoring in whether software is running, its privileges, network exposure, and blast radius. It helps security teams prioritize findings and reduce risk beyond scanner-only, CVE-based approaches, including coverage of zero-days, custom applications, and internal tools.

3 investors

SpeQtral develops quantum key distribution technology for secure communications, offering both satellite-based and fiber-optic terrestrial solutions to protect critical infrastructure against quantum computing threats. The company serves telecommunications providers, governments, healthcare, and financial institutions seeking quantum-safe networks.

3 investors

Sprinto is a compliance and governance, risk, and compliance (GRC) platform that automates security compliance across 200+ frameworks such as SOC 2, ISO 27001, HIPAA, GDPR, and PCI DSS. It serves companies from Series A to enterprise, covering compliance, vendor risk, AI governance, and audit preparation through integrations with cloud, identity, HR, and SaaS systems.

3 investors

Staex builds a secure autonomous agent platform for connected devices and machines, enabling cryptographically verified data exchange and autonomous transactions across IoT ecosystems. The technology is designed for industrial applications, mobility, and the emerging machine economy.

3 investors

Start9 promotes decentralized personal computing that gives individuals control over their own data and communications, aiming to remove trusted third parties from the human/computer relationship. Its focus areas include privacy, encryption, and open decentralized network protocols such as the Internet and Bitcoin.

3 investors