Defense Tech Startups

SAFE Boats International designs and manufactures high-performance aluminum vessels for defense, security, law enforcement, fire and rescue, military, and emergency medical operations. The company offers configurable boat platforms tailored to specific mission requirements and operates as an employee-owned business based in the U.S.

1 investor

SafeFlight provides AI/ML-based systems for detecting, investigating, and responding to unauthorized drone activity at airports and critical infrastructure. The platform integrates counter-UAS technology with emergency dispatch centers and first responders to support incident reporting, forensic analysis, and risk mitigation.

1 investor

SafeKey Lab builds cybersecurity for autonomous spacecraft, offering space domain awareness, onboard defense for the command bus and onboard AI, and adversarial red-team testing through its Vela platform. It serves government space programs, commercial constellation operators, and satellite manufacturers, and offers an adjacent module for AI security in the ground segment.

1 investor

SoundThinking (Nasdaq: SSTI) is a public safety technology company offering AI- and data-driven tools for law enforcement, civic leaders, and security professionals through its SafetySmart platform, which includes ShotSpotter acoustic gunshot detection, CrimeTracer, CaseBuilder, ResourceRouter, SafePointe weapons detection, and PlateRanger ALPR. Formerly known as ShotSpotter, the company serves over 300 customers and roughly 2,100 agencies, primarily in U.S. cities.

1 investor

Safety from Space develops Beagle, an adaptive software-defined radio waveform (delivered as software and firmware) that runs on existing satellites and third-party hardware to provide resilient two-way communications in contested or degraded spectrum. It targets defense, emergency services, and search-and-rescue applications, from wearable distress beacons to satellite payloads.

1 investor

Sandboxx operates a platform that enables military personnel and their families to send letters and photos, with the company handling printing, packaging, and mailing logistics. The platform also supports military commands in improving communication and readiness among service members and their families.

1 investor

Sapient Perception is a physical AI company building a perception layer that combines ultra-high-resolution sensing with intelligent edge processing, using its IGNITE framework to turn sensor data into real-time actionable intelligence. It targets autonomous platforms and mission-critical decision-making, with roots in ultra-high-resolution UAV cameras for geospatial, industrial, and defense applications.

1 investor

Satellite Evolution is a media platform providing daily news, expert analysis, video interviews, podcasts, magazines, and events for professionals in the satellite, space, defence, and communications sectors. It offers a multichannel content platform and an industry directory connecting satellite operators, manufacturers, and service providers across the supply chain.

1 investor

Savotta produces military and tactical gear including field tents, tent stoves, backpacks, plate carriers, pouches, and ballistic panels. The Finnish brand serves military, tactical, and outdoor users with rugged equipment.

1 investor

Scaled Atomics develops the MN-350, a deployable nuclear energy module designed to deliver continuous power at the tactical edge without refueling or supply lines. It targets military and defense applications, enabling the joint force to generate, store, and distribute energy as a warfighting capability.

1 investor

SCATR provides "Zero Trust Transit," a security overlay that protects data in motion by segmenting, camouflaging, and distributing traffic across multiple paths to defeat traffic analysis, metadata fingerprinting, and quantum "harvest now, decrypt later" attacks. It targets defense, intelligence, and critical infrastructure operators as well as commercial sectors like finance, healthcare, and crypto, adding a transit-layer to existing encryption and Zero Trust stacks.

1 investor

Scipio provides an adaptive logistics platform for military operations that uses machine learning to coordinate multimodal resupply and provides real-time asset visibility across coalition forces.

1 investor

Scura builds a counter-drone defense system that uses onboard EO/IR sensors and multiple re-stageable effectors to detect and neutralize uncrewed aerial threats. Its platforms coordinate shared tracks and effector pools across sites to protect critical infrastructure and high-value assets.

1 investor

SeaDeep builds AI products for the ocean and blue economy and advises startups, investors, and corporates across the ocean, energy, and defense sectors. Its work has included autonomous underwater inspection, environmental compliance monitoring for offshore wind, and contributing AI capabilities to an ocean-mapping initiative.

1 investor

Seadronix develops AI-powered solutions for maritime navigation, including autonomous navigation systems, navigation assistance, and vessel monitoring for the shipping and logistics industry. The company serves ship operators and port authorities seeking to improve safety and efficiency in marine logistics.

1 investor

Segers Aero is an FAA-approved facility that overhauls aircraft engines and propellers and provides engineering support for propulsion systems on military aircraft such as the C-130 and P-3. It serves militaries worldwide through OEM partnerships with Rolls-Royce, Lockheed Martin, and Honeywell.

1 investor

Sekisui Aerospace designs and manufactures composite structural components, systems, and engine parts for aircraft, including primary and secondary structures, interior assemblies, environmental control systems, and fan cowl components for commercial, general aviation, unmanned, and defense aerospace markets.

1 investor

SEMPRE F is a portable, EMP-hardened enclosure combining 5G cellular network infrastructure, enterprise data center capabilities, and satellite gateway functionality designed for mission-critical communications. It serves government agencies, medical facilities, universities, and smart cities requiring resilient, secure wireless and cloud services in disaster-prone areas.

1 investor

Sensofusion is an anti-drone technology company that combines hardware and software solutions to detect, track, and neutralize unauthorized drones. The company serves government, military, and critical infrastructure operators worldwide.

1 investor

Sensorz builds SWORD, an orchestration platform for electromagnetic spectrum operations that closes response loops in real time and integrates with third-party systems such as anti-drone activation, jamming, intelligence gathering, and alerting. It targets military and battlefield defense operators seeking automated or manual responses to spectrum events.

1 investor

SentiSystems develops sensor fusion technology centered on the SentiBoard, a custom circuit board enabling high-precision time synchronization across multiple sensor types for autonomous systems applications. The company serves industrial and research sectors requiring reliable multi-sensor integration.

1 investor

Sentinel R&D mass-manufactures modular, payload-agnostic fixed-wing UAVs using automated composites, offering mission-specific and export-ready configurations. The company builds drone platforms designed for military warfighters and battlefield use.

1 investor

Sepura designs, develops, and supplies TETRA radio communications systems for mission-critical operations used by emergency services and other organizations globally. The company serves public safety and operational resilience sectors across over 100 countries.

1 investor

SeRo provides airspace surveillance and GNSS performance monitoring through ground receiver networks and analytics platforms. The company serves aviation organizations and stakeholders requiring real-time visibility into RF spectrum, interference detection, and airspace operations management.

1 investor