Cybersecurity Startups

Sia provides decentralized, open-source storage and data protection technologies for privacy-preserving applications. The company targets users and developers seeking secure, alternative storage solutions outside traditional centralized systems.

1 investor

Siemba offers a unified offensive security platform combining continuous attack surface mapping, autonomous vulnerability assessment, autonomous and expert-led penetration testing across web, API, cloud, network, mobile, and AI/LLM systems. It serves enterprise security teams with continuous, evidence-based testing, unlimited automated retesting, and certified engineer sign-off for audit-ready compliance.

1 investor

Sigma360 builds risk intelligence software that combines global data, entity resolution, and matching to deliver financial crime, credit risk, and decisioning solutions. It serves financial services, corporates, and professional services firms, supporting AML screening, monitoring, KYC, KYB, and CDD compliance.

1 investor

SignalX provides a unified risk management platform that helps organizations discover, verify, monitor, and manage risk across business relationships, vendors, suppliers, and investments. The platform combines intelligence, automation, and monitoring to enable enterprises to achieve real-time risk visibility instead of periodic assessments.

1 investor

Silence Laboratories develops privacy-preserving computation technology, with a team drawing on cryptography, academic, and industry expertise. It operates R&D centers and contributors distributed across multiple countries.

1 investor

SilentSignals develops AI-based tools for detecting fake images and videos (Deepfake Hunter) and for targeted OSINT and threat/sentiment intelligence analysis. It serves forensic analysts, government agencies, and intelligence teams, offering tools built on platforms such as OpenAI ChatGPT, Google Gemini, and Python.

1 investor

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

1 investor

SimSpace provides a cyber range platform where security teams train, test, and operationalize AI agents and human analysts in a realistic digital replica of their production environment. Its AI Proving Grounds lets teams continuously stress-test agentic SOC defenses against LLM-based threats.

1 investor

Simudyne builds simulation and agent-based modeling software that combines AI and machine learning to help organizations test decisions and drive growth. The company serves global banks, regulators, and exchanges.

1 investor

SineWave Ventures is a venture capital firm that invests in data, analytics, networking, cybersecurity, and computing technologies, with a focus on companies bridging commercial and public-sector (government, defense, and intelligence) markets. It backs early-stage companies developing AI/ML developer tooling, adaptive networks, zero-trust security, and high-performance computing.

1 investor

Sinpex provides KYC (Know Your Customer) and KYB (Know Your Business) compliance solutions that help organizations verify customer and business identities at scale while maintaining regulatory compliance and reducing risk.

1 investor

A fraud prevention platform that helps companies protect against fraudulent attacks through best practices and anti-fraud features. The company serves enterprise clients seeking to mitigate fraud risks.

1 investor

Sitehop provides encryption technology designed for real-time data protection that prioritizes speed and quantum-readiness. The company serves organizations seeking to secure data-in-motion without compromising performance or future-proofing against quantum threats.

1 investor

SiteLock provides website security and malware removal services for hacked sites, offering emergency repair and ongoing monitoring to restore functionality and prevent future attacks. The company serves website owners across ecommerce platforms and small businesses.

1 investor

Sixscape Communications develops secure communications solutions featuring cryptographic authentication and an End2End Direct Connectivity model using IPv6 that removes intermediary servers. The company serves IoT, M2M, and 5G markets with secure communications applications for Windows and mobile devices.

1 investor

Skaylink is a cloud services provider that helps organizations build, migrate, and modernize infrastructure and applications across multiple hyperscaler platforms, and offers managed services along with cloud security and compliance. It serves enterprise clients and has worked with companies such as Henkel, BMW Group, and Continental.

1 investor

Skydda builds AI agents that autonomously investigate every security alert in a SOC, ingesting logs from a team's existing security stack and producing full reasoning, audit trails, and reports for each decision. It is aimed at security teams overwhelmed by alert volume, functioning like an automated tier-1 analyst layer for alert triage.

1 investor

Skyone offers a multi-cloud platform that integrates ERPs and legacy systems into a unified data lake to build custom AI agents and automate business processes, along with public cloud infrastructure and 24×7 cybersecurity. It serves enterprises seeking cloud migration, data optimization, AI automation, and security compliance (LGPD, ISO 27001).

1 investor

Skysnag provides email authentication solutions designed to protect businesses and individuals against cyber threats and secure digital interactions online.

1 investor

Skyverse develops software solutions for aviation challenges, leveraging expertise from air traffic control and pilot backgrounds. The company addresses operational and technical problems in the aviation industry.

1 investor

SlashID provides an identity security platform that detects, governs, and manages human, machine, and AI identities across hybrid and multi-cloud environments. The platform offers threat detection, posture management, and automated remediation to reduce breach risk and operational costs for security leaders.

1 investor

Sloop develops a hypertoken platform that reduces AI hallucinations in large language models for high-risk industries including insurance, defense, healthcare, construction, finance, and intelligence. The technology uses quantum and holographic computing-derived methods and is compatible with any existing AI model.

1 investor

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.

1 investor

Smart Eye Technology provides biometric-driven cybersecurity solutions using continuous facial recognition and behavioral analytics to protect sensitive data and systems from unauthorized access. The company serves businesses seeking to defend against remote access attacks, credential theft, and insider threats in remote and hybrid work environments.

1 investor