DiamondStream Partners

DiamondStream Partners is a growth equity firm based in Seattle, Washington, founded in 2014. The firm specializes in investing in middle-stage companies within the aerospace and aviation sectors, as well as related hardware and software enterprises in the United States and Europe. With a focus on travel transformation, DiamondStream Partners targets businesses that demonstrate significant growth potential and can benefit from emerging technology trends. The Managing Partners, who co-founded Volaris, bring extensive expertise in aviation, investing, and technology to the firm, employing a distinctive approach that is guided by industry demand drivers.

William Donovan

Co-Founder and Managing Director

Brian Flynn

Co-Founder and Managing Director

David Spurlock

Managing Director

Dean Donovan

Co-Founder and Managing Director

9 past transactions

Wingtra

Series B in 2024
Wingtra AG, founded in 2014 and based in Zürich, Switzerland, specializes in the manufacture of professional drones, notably the WingtraOne, a vertical take-off and landing (VTOL) UAV. This drone is designed for high-precision data collection and has applications across various industries, including surveying, agriculture, forestry, and infrastructure management. Since its market introduction in 2017, Wingtra has established partnerships with over 50 major surveying equipment dealers globally, facilitating the adoption of its technology. The WingtraOne can be operated using WingtraPilot software, enabling users to collect survey-grade aerial data that can be transformed into two-dimensional maps and three-dimensional models, thereby enhancing monitoring and inspection capabilities in sectors such as construction, mining, and environmental management.

SwissDrones

Series B in 2024
SwissDrones is an aviation company focused on the development, manufacturing, and operation of long-range unmanned helicopter systems tailored for commercial and public safety uses. The company’s innovative twin-rotor aircraft are engineered to serve as cost-effective alternatives to manned helicopters, offering significant reductions in carbon emissions and enhanced safety by eliminating the need for crewed operations in adverse weather conditions. Their systems are designed for various applications, including aerial surveillance, search and rescue, and critical infrastructure inspections. Equipped to integrate high-end sensor payloads, these unmanned helicopters enable long-range operations beyond visual line of sight during both day and night, with operational endurance extending for several hours.

AlarisPro

Venture Round in 2023
AlarisPro, Inc. provides a web-based subscription service that specializes in fleet management for unmanned aircraft systems (UAS). The company offers two main platforms: AlarisPro for Operators, which delivers proactive fleet management tools and performance data to anticipate maintenance needs, and AlarisPro for Manufacturers, which tracks system performance and lifecycle to inform production and development. Their services cater to a diverse clientele, including large-scale UAS operators, manufacturers, Fortune 500 companies, military contractors, law enforcement agencies, research institutions, and media outlets. Founded in 2019 and based in Baltimore, Maryland, AlarisPro is dedicated to enhancing safety and operational efficiency within the UAS community through its advanced software solutions and component-level tracking capabilities.

Wingtra

Series B in 2023
Wingtra AG, founded in 2014 and based in Zürich, Switzerland, specializes in the manufacture of professional drones, notably the WingtraOne, a vertical take-off and landing (VTOL) UAV. This drone is designed for high-precision data collection and has applications across various industries, including surveying, agriculture, forestry, and infrastructure management. Since its market introduction in 2017, Wingtra has established partnerships with over 50 major surveying equipment dealers globally, facilitating the adoption of its technology. The WingtraOne can be operated using WingtraPilot software, enabling users to collect survey-grade aerial data that can be transformed into two-dimensional maps and three-dimensional models, thereby enhancing monitoring and inspection capabilities in sectors such as construction, mining, and environmental management.

SwissDrones

Venture Round in 2023
SwissDrones is an aviation company focused on the development, manufacturing, and operation of long-range unmanned helicopter systems tailored for commercial and public safety uses. The company’s innovative twin-rotor aircraft are engineered to serve as cost-effective alternatives to manned helicopters, offering significant reductions in carbon emissions and enhanced safety by eliminating the need for crewed operations in adverse weather conditions. Their systems are designed for various applications, including aerial surveillance, search and rescue, and critical infrastructure inspections. Equipped to integrate high-end sensor payloads, these unmanned helicopters enable long-range operations beyond visual line of sight during both day and night, with operational endurance extending for several hours.

Volantio

Series A in 2022
Volantio Inc. is a software company based in Atlanta, Georgia, that specializes in developing technology solutions for the airline industry. The company focuses on maximizing unit revenues and improving customer experience through its automated, mobile-based software. Volantio's platforms, such as SmartAlerts and PriceStream, enable airlines to engage with customers during their booking journey and enhance retargeted marketing efforts. By capturing customer intent data, the software helps airlines dynamically re-accommodate passengers and optimize capacity utilization, ultimately increasing yield and reducing operational costs. Volantio collaborates with major airlines worldwide, providing tools that offer better predictability and control for travelers while enhancing airline operational efficiency. The company was established in 2008 and has expanded its reach with team members in the Netherlands and Australia.

VerdeGo Aero

Series A in 2022
VerdeGo Aero, founded in 2017 by a team of experts in hybrid and battery-electric aviation, specializes in developing advanced propulsion technologies for next-generation aircraft. The company is focused on creating hybrid-electric vertical take-off and landing (VTOL) aircraft designed for on-demand aerial mobility. Its innovative hybrid-electric IDEP powertrain architecture combines hybrid-electric propulsion with battery-electric systems, significantly enhancing performance compared to traditional battery-electric aircraft. This technology aims to provide clients with efficient and cost-effective options for short-range aerial transportation, positioning VerdeGo Aero at the forefront of the evolving aerial mobility landscape.

Elroy Air

Series A in 2021
Elroy Air, Inc. is an aerospace and logistics company based in San Francisco, California, founded in 2016. The company specializes in autonomous aircraft systems designed for aerial cargo delivery, focusing on long-distance transport of heavy cargo. Its innovative air cargo system utilizes rotor-based vertical takeoff and landing (VTOL) technology, transitioning to wing-based cruise flight for efficient long-range delivery. Elroy Air serves various sectors, including commercial shipping, humanitarian aid, and military applications, providing solutions for the middle mile of logistics. Its delivery drones are capable of transporting modular pods loaded with significant amounts of cargo, making them suitable for rapid resupply in challenging environments and offering immediate aid in regions with underdeveloped infrastructure. This technology aims to enhance business-to-business express delivery while reducing costs and environmental impact compared to traditional aircraft.

Stellar Labs

Series A in 2017
Stellar Labs, Inc., incorporated in 2014 and based in Burlingame, California, operates within the technology sector, focusing on the private aviation industry. The company has developed an advanced commercial operations system that integrates an all-digital distribution network, aiming to transform and enhance business aviation. Stellar Labs offers a suite of cloud-based applications designed to cater to a range of operational needs, from simple single-aircraft management to complex operations involving large fleets and multiple bases. This innovative approach positions Stellar Labs as a key player in revolutionizing the efficiency and effectiveness of private aviation services.
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