
ClearSky
525 Okeechobee Blvd, Suite 800, West Palm Beach, FL, 33401, United States
Overview
ClearSky is a venture capital/growth equity group that invests in innovative companies, with a special focus on (i) technologies driving the energy transition, climate related technologies, and sustainability, (ii) the digital transformation of enterprise customers’ operations and communications, and (iii) disruptive solutions for cybersecurity, industrial security, and critical infrastructure security.
- Total investments
- 55
- Lead investments
- 20
- Investments · 12mo
- 1
- Active investors
- 8
Sector focus
- Venture Capital
Investment portfolio
- Ubicquia
Participated · Series D · Feb 2026
Ubicquia builds plug-and-play hardware and software that digitize legacy urban and utility assets, enabling real-time monitoring of power quality, lighting performance, and security conditions. Core offerings include the UbiVu intelligent asset-management platform, UbiCell street-light controllers, UbiScout smart camera accessories, the UbiGrid DTM+ transformer monitor paired with a subscription-based Power Monitoring service, and the UbiHub edge processing device for public safety analytics. The company’s analytics engine processes more than 3.5 billion data sets daily and supports over 1,000 utilities and municipalities worldwide, driving a fast-growing infrastructure-as-a-service revenue model. Ubicquia’s technology is compatible with roughly 450 million streetlights, 500 million transformers, and 1 billion utility poles, giving it a vast addressable market across the U.S., Latin America, Europe, and MENA regions. Recent product launches focus on expanding AI capabilities to help customers cut energy costs, extend asset life, and improve roadway safety. Management plans to use new capital to accelerate AI development and scale direct sales domestically and internationally. Headquartered in Fort Lauderdale, the company serves a broad customer base that now includes retailers, healthcare networks, universities, and large enterprise campuses.
- Guardz
Led · Series B · Jun 2025
Guardz offers an AI-native, unified cybersecurity platform and 24/7 Managed Detection and Response (MDR) purpose-built for Managed Service Providers (MSPs) to protect SMBs across identities, email, endpoints, cloud, and data. The platform combines AI-automated detection and response with expert threat hunting and an integrated SentinelOne EDR, plus Microsoft 365 and Google Workspace integrations to monitor user behavior and prevent account takeover. Since launching from stealth in early 2023, Guardz has onboarded hundreds of MSP partners and is securing thousands of businesses across the globe. With this funding, the company plans to scale go-to-market efforts, expand in the U.S., grow R&D, and develop a next-generation platform with natively built controls to increase automation, risk prevention, and cyber compliance and insurance capabilities. The company emphasizes reducing manual effort for MSPs while enabling them to detect threats faster and respond more accurately. Guardz builds an AI-driven, all-in-one cybersecurity and cyber insurance platform tailored for SMBs and delivered as a managed service. The platform automates detection, remediation and reporting, and enables MSPs to run customized breach simulations and employee training. Guardz pivoted from selling directly to SMBs to working through managed service providers (MSPs), letting MSPs brand offerings “powered by Guardz.” It is selling primarily into the U.S., U.K. and Australia and currently works with about 200 MSPs that serve some 3,000 SMBs and roughly 36,000 seats. Security is the main revenue driver, with cyber insurance offered as an add-on. The company plans to use the new funding to hire additional engineering talent and continue expanding its toolset to keep pace with increasingly sophisticated attacker techniques. Guardz positions itself against competitors including CyberSmart, CrowdStrike and Check Point in a large SMB market served by an estimated 150,000 MSPs globally. Guardz offers a two-part product: a SaaS-based set of low-code security tools for cloud services and white-label cyber insurance sold alongside those tools. The security tools are designed to be implemented without specialized security or advanced technical expertise and to address perimeter and cloud-data attacks driven by Attack‑as‑a‑Service. The company says it launched initially in the U.S. and in a closed beta has acquired 300 customers, with target customers of 10–250 employees and average current cohort size of 30–40 employees. Pricing plans start at $9 per user per month. Guardz’s founders, Dor Eisner (CEO) and Alon Lavi (CTO), bring decades of security experience including intelligence work in Israel’s defense forces and prior enterprise security work (Eisner previously researched the Dark Web at Rapid7). Financially, Guardz emerged from stealth with a $10 million seed financing; the company is not disclosing valuation and is partnering with third-party insurers rather than building its own insurance products.
- XGS Energy
Participated · Equity · Mar 2025
XGS Energy builds a proprietary solid-state, water-independent geothermal system that uses thermally conductive materials to produce round-the-clock baseload power anywhere there is hot rock. Its Thermal Reach Enhancement (TRE) technology completed a shallow field test in 2024, and the company is operating its first commercial-scale well in California, validating predictive performance models and accumulating operating history. XGS positions its modular approach to decouple geothermal from traditional water- and geology-dependent constraints, aiming to unlock geographic flexibility, easier permitting, and faster deployment. The firm says it has a multi-gigawatt commercial project pipeline across the Western United States and is ramping commercial operations ahead of a planned growth equity round later this year. XGS is headquartered in Houston, Texas, and plans to aggressively expand its team through year-end to support deployment and project development. The company’s approach targets improved financeability to attract venture and infrastructure capital for large-scale geothermal projects. XGS Energy has developed a proprietary slurry — a mix of water, surfactants and conductive minerals (patent filings mention graphite‑like materials and silica) — that is injected between a metal casing and surrounding rock to fill cracks and improve heat conduction. The slurry’s surfactant breaks at higher temperatures, releasing minerals that settle into fractures a few feet from the borehole, permitting the company to use a single cased borehole rather than multiple wells. By keeping working fluid isolated inside the metal casing, XGS can avoid contaminated surface water and use lower‑cost, higher‑efficiency heat exchangers, reducing operating costs. CEO Josh Prueher says the technique makes wells more productive and predictable — “we know within 30 days where we’re going to be in 30 years” in terms of power production. XGS’s technology can be applied to both new and existing geothermal wells, and the company plans to develop a version for suitably hot legacy oil and gas wells to avoid plugging and abandonment costs. To help commercialize the technology, XGS recently raised funding to build a commercial‑scale prototype at an existing geothermal field in California. XGS Energy is a geothermal company headquartered in Palo Alto, California that develops a proprietary Thermal Reach Enhancement™ (TRE) system and closed-loop well architecture. Its TRE system uses materials the company says are 50 times more conductive than native rock to deliver high-efficiency thermal energy without dependence on water or specific geology. XGS positions the technology for global deployment and says it enables terawatt-scale geothermal heat and power. The company completed more than 24 months of lab testing and is building a North American prototype to demonstrate TRE at full commercial scale. That prototype is intended to validate predictive performance models and support first commercial projects in the Western United States, Japan, and the Philippines. XGS emphasizes that its closed-loop, water-independent approach allows deployment anywhere in the world, unlike traditional geothermal solutions that require hot water reservoirs and specific geological formations. XGS Energy develops proprietary geothermal heat-harvesting technology and a closed-loop well architecture intended to unlock scalable, affordable, carbon-free baseload power. The technology is designed to eliminate reliance on rare geological formations and water availability, allowing broader deployment of geothermal energy. XGS says its approach enables global deployment and terawatt-scale geothermal heat and power. The company plans to use recent financing to accelerate technology development and commercial progress. XGS announced a $19M financing package, including a $14M Series A led by Anzu Partners, to support development efforts. Headquartered in Palo Alto, the company changed its name from Geothermic Solution LLC to XGS Energy, Inc.
- Mitiga
Participated · Series B · Jan 2025
Mitiga offers a Cloud and SaaS threat detection, investigation, and response (TDIR) platform built by investigators for investigators. Its platform and managed services give SOC teams panoramic visibility across clouds, identities, and SaaS, automation to speed investigations, and rich context for cloud threat detection, hunting, and incident response. The company reports consecutive years of customer and revenue growth and counts blue‑chip customers including Blackstone, ZoomInfo, and New American Funding. Mitiga closed a $30 million Series B to support geographic expansion across North America and Europe, expand sales and marketing, enhance its AI‑driven platform, increase Cloud and SaaS integrations, and forge strategic alliances. The company has added senior leadership, including Executive Chairman John Watters and Board Director Robert Rodriguez, to bolster its growth and go‑to‑market efforts. Mitiga was an RSA Conference 2024 Innovation Sandbox Finalist, which the company cites as evidence of its innovation in cloud security. Mitiga, led by CEO Tal Mozes, is an NYC-based cloud and SaaS incident response provider that develops the IR2 investigation and response automation (CIRA) platform. The company received a strategic investment from Cisco Investments; the amount was not disclosed. Mitiga said it will use the funds to expand market adoption among enterprises seeking modern security solutions for cloud and SaaS environments. IR2 performs continuous hunts for emerging attacks based on Mitiga’s Cloud Attack Scenario Library (CASL), the company’s database dedicated to cloud and SaaS multi-vector hunts. When breaches occur, IR2 proactively gathers, organizes, and analyzes forensic-level data and delivers insights in a single pane of glass. Mitiga offers a subscription service that analyzes cloud forensics data, stores forensics from multiple clouds and SaaS apps, and hunts for attacks using a library of cloud attack scenarios. The platform manages and orchestrates incident response in real time and includes a "forensics as code" module to automate incident response and threat hunts. Mitiga positions itself as a modern alternative to traditional professional-services incident response approaches focused on cloud and SaaS. The company intends to use new funding for product development and to expand its 56-person workforce. Leadership states the business is well-positioned to run for years without additional funds if needed. The company declined to disclose customer counts or revenue figures in the article. Mitiga offers a subscription-based incident readiness and response tech stack that automatically detects breaches, investigates incidents, collects case data and translates findings into remediation steps for relevant teams. The platform documents each event to help organizations fix root causes and prevent future attacks. Mitiga focuses on helping enterprises recover faster in hybrid and multicloud environments, reducing downtime from days to hours. The company also provides emergency response services for active incidents to nonsubscription customers. It was founded in 2019 and has a team of 42 with operations in Tel Aviv and offices in London and New York, serving customers across financial services, banking, e-commerce, law enforcement and government. Mitiga plans to use new funding to expand cybersecurity, engineering, sales and marketing headcount and to grow its partner network while continuing to change how incident readiness and response is delivered. Mitiga offers a customizable incident readiness and response technology stack that automates much of the manual work during active attacks while its team handles remaining response tasks. The company pairs that tech with a managed service offering, including providing talking points for PR teams during incidents. Current customers span banking, ecommerce, elearning, pharmaceuticals and government. Mitiga says its stack is tailored to each client’s organization to improve visibility and preparedness for cloud infrastructure incidents. The startup plans to scale both its incident response technology and service using new funding. Founded and led by cybersecurity veterans, the team of 18 operates from Tel Aviv with additional offices in London and New York City.
- HUMAN
Participated · Equity · Oct 2024
HUMAN Security focuses on safeguarding every step of a customer’s online journey, ensuring that digital interactions, transactions, and connections remain authentic and secure. The company’s core offering blocks malicious bots, prevents fraud, and mitigates digital risk for enterprises operating online. By concentrating on the integrity of the digital world, HUMAN helps organizations maintain trust with their users and customers. The recently secured capital will support the company’s ongoing efforts to enhance its protection capabilities across various digital touchpoints. Although specific financial metrics such as revenue or user counts are not disclosed, the firm positions itself as a leading player in the cybersecurity domain. The new funding is aimed at accelerating product development and expanding the company’s market reach. No additional operational or historical financial details were provided in the article. HUMAN’s commitment is to keep online experiences genuine, secure, and distinctly human.