Defense Tech Startups

Serraverde is a rare earth elements (REE) provider that produces and supplies essential materials for advanced technologies in sectors including renewable energy, transport, medical devices, and defense. The company focuses on developing responsible supply chains and enabling the creation of new value chains dependent on rare earth elements.

1 investor

Sesame Solar develops mobile nanogrids that provide off-grid, fuel-independent power for defense, emergency response, and commercial operations. The company targets critical infrastructure and mission-critical users requiring rapid deployment and energy resilience.

1 investor

SigGenGuru develops high-performance frequency synthesizers and wideband converters for radar and RF communication systems. The company serves defense and commercial sectors in South Korea.

1 investor

ShadowBreak Intl provides geospatial intelligence solutions by acquiring, analyzing, and distributing spatial data for military, commercial, and individual users. The company serves journalists, lawyers, governments, and organizations needing real-time intelligence for disaster relief, defense, and operational decision-making.

1 investor

Shakti Wearables is an India-based company that developed a patented defense technology and builds safety wearables and non-lethal defense products. Its flagship Shakti Band is a wearable device that can deliver an electric shock to attackers and send the wearer's live location to contacts and police via a companion app.

1 investor

Shared Spectrum Company (SSC) develops Dynamic Spectrum Access (DSA) radio technology and spectrum sharing solutions for wireless communications, including work for programs such as DARPA's XG Program. Founded in 2000, it provides RF propagation and spectrum sharing engineering services to government and commercial customers and partners.

1 investor

Shepherd Space Systems is a defense-focused aerospace company that designs and manufactures solid rocket motors, using a proprietary vacuum-isolated extrusion process to produce propellant grains with reduced air voids and tighter ballistic performance. It serves defense program offices, prime contractors, and research laboratories, executing contracts for tactical propulsion, counter-UAS, and payload delivery applications.

1 investor

UFORCE builds autonomous defense systems, including combat-proven platforms used in the Russia-Ukraine War for missions in contested environments. The company pairs advanced AI software with hardware and is expanding from Ukraine to NATO allies and the U.S.

1 investor

Shift provides end-to-end development of autonomous maritime systems, covering mission design, hardware assembly, sensor and payload integration, field deployment, and long-term sustainment. It serves governmental agencies, defence organizations, technology companies, and research initiatives for maritime security and environmental monitoring operations.

1 investor

Shiratech is a Germany-based software engineering partner that develops embedded systems, safety-critical applications, AI-powered solutions, and multi-sensor data fusion. It offers complete product development and team-extension engineering services across industries, including defense and aerospace-related domains.

1 investor

Shree Refrigerations Limited is an Indian manufacturer of defense-focused refrigeration and HVAC&R systems, serving the Indian Navy and strategic defense sectors. It designs and builds marine HVAC&R systems, radar cooling systems, data center cooling units, heat exchangers, and electrical control panels, and provides heavy fabrication services for defense platforms.

1 investor

Sightec develops visual autonomy software for unmanned aerial vehicles (drones) that enables reliable navigation and situational awareness in GPS-denied, urban, and contested environments using computer vision technology. The company serves UAV operators and mission-critical applications across thousands of operational sorties.

1 investor

SignalEdge Solutions develops RF sensor hardware and proprietary DSP algorithms for signal detection, classification, and geolocation, used in applications such as Comint/Elint detection, radars, RF seekers, and electronic warfare. Its low-SWaP sensors are designed to be mounted on ground and airborne platforms for defense and signals-intelligence use.

1 investor

Signalink provides engineering, technical, logistical, and programmatic support services to the aerospace and defense sectors.

1 investor

Silent Capital is a private venture syndicate that gives its accredited-investor members access to multi-stage aerospace, defense, and deep tech deals. It partners exclusively with the early-stage defense and deep tech fund Silent Ventures.

1 investor

Silentium Defence designs and deploys passive radar systems and related software for covert, low-emission surveillance across air, land, maritime and space domains. It serves defence, government and commercial customers with situational awareness, mission planning tools and space surveillance data feeds.

1 investor

SilentSignals develops AI-based tools for detecting fake images and videos (Deepfake Hunter) and for targeted OSINT and threat/sentiment intelligence analysis. It serves forensic analysts, government agencies, and intelligence teams, offering tools built on platforms such as OpenAI ChatGPT, Google Gemini, and Python.

1 investor

Simpulse develops embedded Software-Defined Radio (SDR) modems and radio link solutions for long-range, secure communication in mobile and harsh environments. Its systems serve industrial, public safety, space, defense, and transportation sectors, including applications in drones/UAVs, robots/UGVs, and TV broadcast.

1 investor

Sinéeng develops resilient connectivity and navigation solutions for uncrewed aerial systems (drones) operating in GPS-denied and spectrum-contested environments. The company emphasizes software-first, mass-producible, and modular hardware designed for defense and counter-UAS applications.

1 investor

Sintavia designs and additively manufactures PTMS (Power & Thermal Management Systems) components and subsystems for the aerospace and defense industry using advanced manufacturing techniques. The company specializes in thermodynamic, propulsion, and power systems that offer weight savings and improved performance compared to conventionally manufactured parts.

1 investor

SIONYX is a silicon-based photonics company that develops and manufactures ultra-low-light CMOS image sensors and digital night vision camera systems for commercial, industrial, medical, and defense applications. It supplies consumer night vision cameras, custom sensor and camera modules for OEMs, and imaging technology for the U.S. Department of Defense.

1 investor

Sisu Auto develops and manufactures heavy-duty trucks and military vehicles, and provides related vehicle technology consulting, design, and project management services. It operates in the Nordic defense and heavy-vehicle market.

1 investor

Six15 designs, develops, and manufactures head-up displays (HUDs) for users in demanding defense and industrial environments. Building on its defense-market work, the company supplies HUD and augmented reality hardware and software to enterprise verticals.

1 investor

SIXGEN is a Non-Traditional Defense Contractor that provides cybersecurity solutions for government agencies, critical infrastructure organizations, and enterprises to identify vulnerabilities and defend against advanced cyber threats. Its offerings include operational infrastructure, command-and-control platforms, and multi-domain cyber mission delivery.

1 investor