ClearSky

ClearSky is a Florida-based venture capital firm that provides growth capital and growth equity to innovative technology companies. Founded in 2012, it focuses on early-stage and later-stage investments across the United States, with a portfolio spanning clean tech, energy, business services, digital transformation for enterprise customers, and cybersecurity, industrial security, and critical infrastructure security. The firm emphasizes technologies driving energy transition and climate-related solutions, as well as sustainability and disruptive security technologies. ClearSky operates from its base in Palm Beach, Florida, with offices in New York, Boston, and San Francisco.

James Goldinger

Venture Partner

James Huff

Managing Partner

David Kaiserman

Venture Partner

Peter Kuper

Venture Partner

Guy Nizan

Venture Partner

Past deals in Network Security

Mitiga

Series B in 2025
Mitiga, Ltd is a cybersecurity company based in Tel Aviv-Yafo, Israel, specializing in hybrid managed security services for cloud environments. The firm offers a comprehensive solution for detecting, investigating, and responding to threats in Software as a Service (SaaS) and cloud settings. Mitiga's services include incident response, breach readiness, and emergency assistance, enabling businesses to enhance their security posture. The company's technology automates preliminary investigative work during incidents, streamlining the response process and improving overall breach readiness. Additionally, Mitiga leverages artificial intelligence and high-performance computing to help organizations model and quantify potential losses from various catastrophic events, addressing the unique security challenges faced in modern digital environments.

HUMAN

Venture Round in 2024
HUMAN is a cybersecurity company focused on safeguarding enterprises from bot attacks, thereby enhancing digital experiences for genuine users. The company employs its advanced Human Verification Engine to protect applications, APIs, and digital media from malicious bot activity, which can lead to significant financial losses and degrade user experience. HUMAN verifies over 10 trillion interactions weekly for major companies and internet platforms, ensuring that digital engagements are legitimate. Its solutions cover a range of sectors, including advertising, publishing, and enterprise, addressing various threats such as automated fraud, data scraping, and account takeovers. Founded in 2012 and headquartered in New York, with additional offices in Washington, D.C., London, and Victoria, HUMAN continues to innovate in the field of online security.

Guardz

Series A in 2023
Guardz is a cybersecurity company that develops an AI-native unified detection and response platform to protect small and medium-sized businesses. The platform automatically discovers and monitors user digital footprints and business-critical applications to continuously analyze cybersecurity posture and identify and prevent cyber threats, including online fraud, phishing, malware, ransomware, and data breaches, helping organizations safeguard their data and information from third-party attacks and cyber risks.

Mitiga

Series A in 2023
Mitiga, Ltd is a cybersecurity company based in Tel Aviv-Yafo, Israel, specializing in hybrid managed security services for cloud environments. The firm offers a comprehensive solution for detecting, investigating, and responding to threats in Software as a Service (SaaS) and cloud settings. Mitiga's services include incident response, breach readiness, and emergency assistance, enabling businesses to enhance their security posture. The company's technology automates preliminary investigative work during incidents, streamlining the response process and improving overall breach readiness. Additionally, Mitiga leverages artificial intelligence and high-performance computing to help organizations model and quantify potential losses from various catastrophic events, addressing the unique security challenges faced in modern digital environments.

Fortress Information Security

Series C in 2022
Fortress Information Security LLC, founded in 2015 and based in Orlando, Florida, specializes in cybersecurity and supply chain risk management services, focusing on helping organizations mitigate emerging cyber threats. The company offers a comprehensive range of services, including third-party risk management, cloud and mobile risk management, threat monitoring, incident response, and operational intelligence. Fortress serves various sectors, including power utilities, transportation, finance, and healthcare, providing tailored solutions that align with their clients' specific business processes. Central to its offerings is the Fortress Platform, which serves as a single source of truth for clients, utilizing automation and advanced analytics to ensure effective risk management and regulatory compliance. By integrating risk assessments, continuous monitoring, and expert analysis, Fortress empowers organizations to identify and address vulnerabilities across their entire digital ecosystem, enhancing their resilience against potential cyber incidents.

Mitiga

Series A in 2021
Mitiga, Ltd is a cybersecurity company based in Tel Aviv-Yafo, Israel, specializing in hybrid managed security services for cloud environments. The firm offers a comprehensive solution for detecting, investigating, and responding to threats in Software as a Service (SaaS) and cloud settings. Mitiga's services include incident response, breach readiness, and emergency assistance, enabling businesses to enhance their security posture. The company's technology automates preliminary investigative work during incidents, streamlining the response process and improving overall breach readiness. Additionally, Mitiga leverages artificial intelligence and high-performance computing to help organizations model and quantify potential losses from various catastrophic events, addressing the unique security challenges faced in modern digital environments.

Mitiga

Series A in 2021
Mitiga, Ltd is a cybersecurity company based in Tel Aviv-Yafo, Israel, specializing in hybrid managed security services for cloud environments. The firm offers a comprehensive solution for detecting, investigating, and responding to threats in Software as a Service (SaaS) and cloud settings. Mitiga's services include incident response, breach readiness, and emergency assistance, enabling businesses to enhance their security posture. The company's technology automates preliminary investigative work during incidents, streamlining the response process and improving overall breach readiness. Additionally, Mitiga leverages artificial intelligence and high-performance computing to help organizations model and quantify potential losses from various catastrophic events, addressing the unique security challenges faced in modern digital environments.

FireEye

Post in 2020
FireEye, Inc. is a cybersecurity company that specializes in providing comprehensive solutions for organizations to prepare for, prevent, investigate, respond to, and remediate cyber-attacks. The company offers a range of products, including network, email, endpoint, and cloud security solutions, as well as the Helix Security Platform, which integrates and analyzes data from various security assets. FireEye also provides advanced threat intelligence through its Mandiant brand, offering services such as managed detection and response, digital threat monitoring, and access to expert consultation. The firm is recognized for its unparalleled threat intelligence and real-time knowledge of the global threat landscape, supported by a team of experienced analysts and researchers. FireEye caters to a diverse clientele, including telecommunications providers, financial services, healthcare organizations, and government agencies, delivering its services through distributors, resellers, and strategic partnerships across various regions. Founded in 2004 and headquartered in Milpitas, California, FireEye is known for its innovative approach to cybersecurity, combining technology with frontline human expertise to address complex security challenges.

Mitiga

Seed Round in 2020
Mitiga, Ltd is a cybersecurity company based in Tel Aviv-Yafo, Israel, specializing in hybrid managed security services for cloud environments. The firm offers a comprehensive solution for detecting, investigating, and responding to threats in Software as a Service (SaaS) and cloud settings. Mitiga's services include incident response, breach readiness, and emergency assistance, enabling businesses to enhance their security posture. The company's technology automates preliminary investigative work during incidents, streamlining the response process and improving overall breach readiness. Additionally, Mitiga leverages artificial intelligence and high-performance computing to help organizations model and quantify potential losses from various catastrophic events, addressing the unique security challenges faced in modern digital environments.

HUMAN

Venture Round in 2020
HUMAN is a cybersecurity company focused on safeguarding enterprises from bot attacks, thereby enhancing digital experiences for genuine users. The company employs its advanced Human Verification Engine to protect applications, APIs, and digital media from malicious bot activity, which can lead to significant financial losses and degrade user experience. HUMAN verifies over 10 trillion interactions weekly for major companies and internet platforms, ensuring that digital engagements are legitimate. Its solutions cover a range of sectors, including advertising, publishing, and enterprise, addressing various threats such as automated fraud, data scraping, and account takeovers. Founded in 2012 and headquartered in New York, with additional offices in Washington, D.C., London, and Victoria, HUMAN continues to innovate in the field of online security.

CyberGRX

Series D in 2019
CyberGRX is a cybersecurity company based in Denver, Colorado, that specializes in third-party cyber risk management. The company offers a comprehensive platform designed to help organizations identify, assess, mitigate, and monitor their cyber risk exposure across their entire partner ecosystem. By leveraging automation and advanced analytics, CyberGRX enables enterprises to effectively manage and monitor risks associated with their vendors, partners, and customers. The platform provides a cost-effective and scalable solution, allowing organizations to gain complete visibility into their risk portfolio while facilitating real-time decision-making and predictive capabilities.

Respond Software

Series B in 2019
Respond Software, Inc. is a developer of automated security operations software based in Mountain View, California. Founded in 2016, the company specializes in providing advanced cyber security threat protection through its flagship product, Respond Analyst, a self-driving security operations center (SOC). This innovative platform utilizes probabilistic graphical optimization technology to automatically diagnose and escalate security incidents, effectively emulating the decision-making capabilities of an expert security analyst. By integrating human expertise with automated systems, Respond Software enhances the efficiency and performance of security operations, addressing the critical shortage of skilled analysts in the field. The company's solutions allow enterprises and government organizations to improve monitoring and triage capabilities while significantly reducing operational costs. Respond Software operates as a subsidiary of FireEye, Inc. as of November 2020.

Prisma SD-WAN

Series C in 2019
Prisma SD-WAN, formerly known as CloudGenix, specializes in software-defined wide-area networking (SD-WAN) solutions designed to support hybrid cloud environments and mobile workforces. The company offers a platform that virtualizes enterprise networks, facilitating user connectivity to cloud and data center applications while minimizing the infrastructure needed for remote offices. Its products centralize critical network functions, such as firewalling and threat detection, and include the ION 2000 hardware appliance, which provides essential SD-WAN capabilities for small and remote offices. By enabling application-specific service-level agreements (SLAs), Prisma SD-WAN enhances application performance based on business priorities. Founded in 2013 and headquartered in San Jose, California, the company caters to various industries, including retail, financial services, automotive, legal, and technology, striving to simplify network design and management while delivering significant cost savings and enhanced security.

CyberGRX

Series C in 2018
CyberGRX is a cybersecurity company based in Denver, Colorado, that specializes in third-party cyber risk management. The company offers a comprehensive platform designed to help organizations identify, assess, mitigate, and monitor their cyber risk exposure across their entire partner ecosystem. By leveraging automation and advanced analytics, CyberGRX enables enterprises to effectively manage and monitor risks associated with their vendors, partners, and customers. The platform provides a cost-effective and scalable solution, allowing organizations to gain complete visibility into their risk portfolio while facilitating real-time decision-making and predictive capabilities.

Demisto

Series C in 2018
Demisto operates a security operations platform that integrates intelligent automation and collaboration into a single interface, facilitating incident response, process standardization, and threat hunting for security teams. The company's platform, which includes features like orchestration, incident management, and interactive investigation, helps organizations accelerate their response to security incidents and learn from them collaboratively. Founded in 2015 and headquartered in Santa Clara, California, with additional offices in the San Francisco Bay Area and Tel Aviv, Israel, Demisto has a strategic partnership with ProtectWise. As of March 28, 2019, Demisto operates as a subsidiary of Palo Alto Networks.

Capsule8

Series B in 2018
Capsule8, founded in 2016 and headquartered in New York, specializes in cyber protection for enterprise infrastructure, focusing specifically on Linux systems. The company offers Capsule8 Protect, a platform designed to detect and mitigate attacks in real-time across various environments, including containerized, virtualized, and bare metal systems. With a team comprised of experienced hackers and security entrepreneurs, Capsule8 aims to provide continuous security, allowing organizations to safeguard their Linux-powered infrastructures from zero-day attacks and other unwanted activities without the need for human intervention. This innovative approach enables enterprises to modernize their systems while maintaining robust security.

iS5 Communications

Venture Round in 2018
iS5 Communications Inc. is a global provider of secure industrial Ethernet products and integrated services for critical infrastructure and industrial environments. Its offerings serve utility substations, roadside transportation, rail, and other industrial applications, delivering switches, routers, device servers, media converters, Wi‑Fi, video surveillance, and network management products. The company provides comprehensive services, including consulting, planning, design, project management, pre-staging, configuration and deployment, resident engineer support, and training, along with support options such as phone assistance and service level agreements. Security services include security consulting, network security design, implementation, intrusion protection and detection, and user authentication. End-to-end network solutions cover automation, analytics, data management, visualization, and overall communications infrastructure. A key offering is the RAPTOR platform, a hardened cybersecure system that enables industrial and critical infrastructure networks and allows IIoT/Industry 4.0 applications to run securely on premises or in the cloud. Headquartered in Mississauga, Canada.

IntSights

Series C in 2018
IntSights is an external threat intelligence and protection platform focused on neutralizing cyber threats before they infiltrate organizational perimeters. The company provides cybersecurity teams with tools to effectively detect and prevent potential threats at their source, utilizing proprietary data mining algorithms and advanced machine learning capabilities. This enables rapid and accurate cyber threat intelligence and incident mitigation in real-time. IntSights' solutions help organizations address various risks, including phishing, fake applications, and data leakage, through an intuitive dashboard. Founded by veterans of elite Israeli military intelligence units, the company leverages their deep understanding of the hacker mindset to enhance its defense strategies against cyberattacks.

Capsule8

Series A in 2017
Capsule8, founded in 2016 and headquartered in New York, specializes in cyber protection for enterprise infrastructure, focusing specifically on Linux systems. The company offers Capsule8 Protect, a platform designed to detect and mitigate attacks in real-time across various environments, including containerized, virtualized, and bare metal systems. With a team comprised of experienced hackers and security entrepreneurs, Capsule8 aims to provide continuous security, allowing organizations to safeguard their Linux-powered infrastructures from zero-day attacks and other unwanted activities without the need for human intervention. This innovative approach enables enterprises to modernize their systems while maintaining robust security.

Authentic8

Series B in 2017
Authentic8, Inc. is a technology company that specializes in developing a cloud-based virtual browser designed to enhance security while accessing web data. Founded in 2010 and headquartered in Mountain View, California, Authentic8 offers its flagship product, Silo, which addresses significant cybersecurity challenges associated with traditional web browsers. Silo operates on remote servers, isolating all web code within a secure container, thereby minimizing risks from untrusted devices and insecure networks. The browser executes in a secure sandbox, ensuring that user sessions do not leave any forensic residue on client devices once they conclude. This approach allows users to manage sensitive data, control access, and conduct critical web research safely and effectively.

ProtectWise

Series B in 2017
ProtectWise is a Denver-based company that specializes in cloud-powered network detection and response (NDR) solutions. Founded in April 2013, it provides organizations with advanced analytics capabilities for cloud, hybrid, and enterprise traffic, enabling real-time and retrospective threat detection. The platform captures and indexes full-fidelity packets indefinitely, creating a searchable network memory that enhances incident response and threat hunting. By utilizing machine learning and flow-based traffic algorithms, ProtectWise allows security professionals to identify threats as they occur and to uncover previously unknown threats through retrospective analysis. The company is led by a team of experienced professionals from the security and SaaS sectors, having launched the Immersive Security movement in 2017 to innovate within the security industry.

Demisto

Series B in 2017
Demisto operates a security operations platform that integrates intelligent automation and collaboration into a single interface, facilitating incident response, process standardization, and threat hunting for security teams. The company's platform, which includes features like orchestration, incident management, and interactive investigation, helps organizations accelerate their response to security incidents and learn from them collaboratively. Founded in 2015 and headquartered in Santa Clara, California, with additional offices in the San Francisco Bay Area and Tel Aviv, Israel, Demisto has a strategic partnership with ProtectWise. As of March 28, 2019, Demisto operates as a subsidiary of Palo Alto Networks.
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