Defense Tech Startups

Starburst is a global accelerator dedicated to Aerospace & Defense startups, providing acceleration programs, consulting missions, private pitches and events. It connects startups with industrial partners and allied governments through a team present in nine countries.

1 investor

STAT-TIS develops integrated logistics solutions combining hardware, software, and field support to provide real-time visibility of military fuel and sustainment operations. The company serves military commanders and units to enable faster decision-making and improved operational readiness.

1 investor

A company that curates and sells survival and defense gear for private-sector customers, selecting equipment with a history of professional or military use and optimizing it for individual use. It offers configurable kits built around vetted brands.

1 investor

Project Omega recycles spent nuclear fuel and develops next-generation nuclear power systems for national security, energy independence, and waste remediation. The company builds portable power sources and fuel recycling infrastructure to meet growing U.S. energy demand.

1 investor

Stedfast manufactures advanced protective barrier materials for industrial and safety applications across multiple industries. Founded in 1930, the company operates state-of-the-art facilities in Tennessee and Quebec focused on material science and protective technologies.

1 investor

Steel Mirror integrates computer vision, data generation, and autonomous systems into manufacturing and security applications, with a focus on deterministic AI compliance software for regulatory environments. The company serves manufacturers and government agencies seeking cost-effective automation and policy-driven AI solutions.

1 investor

Stellant Systems manufactures RF power amplification and spectrum products for space, defense, medical, scientific, and industrial applications serving both domestic and international markets.

1 investor

Stellios develops high-power microwave and RF power systems, including vacuum HPM devices, high-voltage modulators, gyrotrons and klystrons, and applies them to directed-energy defense platforms against drones and guided munitions. The company is also developing compact fusion power for grid-scale and expeditionary use and fusion-driven in-space propulsion.

1 investor

Stottler Henke develops AI-based software solutions for complex problem-solving, scheduling, training simulations, intrusion detection, and data visualization, serving defense, aerospace, and government agencies.

1 investor

Stratolia develops software for planning, operating, and supervising stratospheric balloon missions at altitudes of 15-35 km. The platform is designed for defense applications requiring sovereign capability, and serves research and telecommunications markets.

1 investor

Stratotegic develops navigable High-Altitude Platform Station (HAPS) stratospheric balloon systems with autonomous flight control and navigation, providing persistent intelligence, surveillance, and reconnaissance (ISR) and communications augmentation for defence, government, commercial, and research customers. Its dual-use platforms support missions such as Arctic sovereignty, border and maritime monitoring, wildfire and disaster response, and non-terrestrial telecommunication networks, with a stated focus on Canada and allied operations.

1 investor

Stridar builds the Siderunner, an unmanned ground vehicle (UGV) integration platform designed to carry third-party payloads, sensors, autonomy stacks, communications, and mission systems. It serves integrators, military teams, and civilian operators in sectors such as ISR, demining, logistics, construction, and infrastructure inspection.

1 investor

Strix Vision AI offers an investigator-grade platform for narrative drafting, likely serving law enforcement, legal, or investigative professionals.

1 investor

Summit Interconnect produces specialized printed circuit boards for defense applications including autonomous systems, radar and sensor platforms, and intelligence/surveillance/reconnaissance equipment.

1 investor

Sunvair is an international aerospace maintenance, repair, and overhaul (MRO) provider offering repair and engineering services for flight-critical components including avionics, hydraulics, landing gear, and electrical systems. It serves commercial airlines, militaries, OEMs, and other repair stations, with Parts Manufacturer Approval (PMA) and in-house Designated Engineering Representative (DER) capabilities.

1 investor

Supashock is an Australian advanced technology company that provides engineering design, validation, testing, and manufacturing of motion and mobility products for the defence, autonomous, mining, and automotive markets. It develops systems such as vehicle running gear and automated logistics handling equipment, often in partnership with defence firms.

1 investor

Supply Energetics manufactures energetics materials, with a focus on nitrocellulose-based products meeting MIL-DTL standards, and is working to modernize and rebuild U.S. energetics production capacity. It serves defense and civilian markets with manufacturing, R&D, and secure magazine storage services.

1 investor

Survitec provides survival and safety technology products and after-sales support for customers operating in highly regulated industries and markets worldwide. The company delivers lifesaving equipment through a range of international brands.

1 investor

A company positioned around security and defense with a stated focus on Europe, though the page provides only high-level mission statements without concrete details on its products or services.

1 investor

cloudSwXtch is a software-based network switch that enables multicast, lossless packet flows, and real-time media distribution across cloud, on-premises, and hybrid environments without requiring code changes. It serves media and broadcast organizations that need standards-compliant (IGMPv2/3, SMPTE 2110) network infrastructure across distributed infrastructure.

1 investor

Symetrica manufactures radiation detection and integrated threat detection systems for airport, port, military, and homeland security applications. The company provides handheld devices, portal monitors, X-ray integration platforms, and a software platform called Discovery Technology for operational command and control.

1 investor

Synacktiv provides penetration testing and advanced Red Team services that simulate real-world, threat-led attacks against an organization's critical functions, aligned with regulatory cyber-resilience frameworks such as TIBER-EU and DORA. Its assessments target specific assets and environments including internal networks, web and mobile applications, CI/CD, cloud infrastructure, and embedded IoT/OT systems.

1 investor

Synergy ECP provides data transport infrastructure, DevSecOps platforms, and cloud-native engineering services designed for enterprise mission environments, particularly supporting U.S. intelligence community and defense sector operations.

1 investor

SYOS Aerospace designs and manufactures uncrewed vehicles and autonomous systems across air, land, sea, and subsurface domains, including surface and underwater vessels. It serves defence, civil, and commercial organisations with AI-driven autonomy for operations in demanding environments.

1 investor