Deep Tech Startups

Summit Lithium develops direct lithium extraction (DLE) technology to produce lithium at lower cost and with reduced environmental impact compared to conventional methods. The company serves battery and energy transition markets with a focus on water efficiency and smaller surface footprints.

1 investor

Suden Density develops innovative coating technology for smart coatings. The company has received NSF SBIR/STTR funding for research and commercialization of its coating solutions.

1 investor

Sunflower Capital is an early-stage venture firm that writes first checks (pre-seed and seed) to founders building companies in enterprise software, critical industries, and hardware/physical-world sectors. It backs teams across AI, data infrastructure, developer tools, healthcare, fintech, and defense, and works closely with founders on go-to-market, hiring, and fundraising.

1 investor

Super6 develops advanced supercapacitors using scalable materials for high-power energy storage applications. The company serves grid operators, transport, data centers, and industrial sectors requiring fast energy storage for sustainability and resilience.

1 investor

Supercool Earth develops technology to produce precipitation on demand. The company is headquartered in San Francisco with manufacturing in Nova Scotia, Canada.

1 investor

Autofabricantes collaborates with Universidad Politécnica de Madrid on research and development projects for mechanical prosthetics and mobility devices, designed and tested with individuals who have motor disabilities. The organization works on arm and leg prosthetics, specialized wheelchairs, and 3D printing materials research in partnership with university students and faculty.

1 investor

SuperLight Photonics develops compact, integrated photonics-based laser sources for scientific and industrial applications including optical coherence tomography, spectroscopy, and imaging. The company serves laboratory and industrial customers across biomedical, research, and manufacturing sectors.

1 investor

Supermag manufactures magnetic levitation motors, fluid transport systems, and vacuum solutions for semiconductor, biopharmaceutical, chemical, and energy industries. The company provides high-purity, low-shear equipment designed to meet demanding manufacturing and processing requirements across multiple industrial sectors.

1 investor

Surface Generation builds custom production equipment and its PtFS process-control platform for high-performance manufacturing applications such as in-situ consolidation, 3D printing, and automated tape lay-up. It serves the aerospace, automotive, and consumer goods industries with solutions ranging from off-the-shelf products to turnkey systems.

1 investor

Surfix develops diagnostic tests based on surface modification and organic chemistry technologies, offering accessible and easy-to-use solutions for early diagnosis and monitoring of medical conditions. The company operates as a spin-off from Wageningen University & Research's organic chemistry department.

1 investor

Surftec Engineering develops and manufactures specialized surface coatings including low-friction, anti-corrosion, anti-icing, anti-fouling, and mold release formulations. The company serves industrial customers requiring advanced tribological and surface engineering solutions.

1 investor

SurFunction develops functional metasurfaces using laser-structured precision and advanced materials, serving manufacturers who need surface processing capabilities through rapid prototyping, dedicated systems, or direct integration into production lines.

1 investor

Sussex Place Ventures is an early-stage venture capital firm that invests in entrepreneurs building enterprise software and patent-protectable deep technology.

1 investor

Sustaera develops a Direct Air Capture technology powered by renewable energy to remove and reuse atmospheric CO2 at large scale. The company operates in the carbon removal and climate technology sector.

1 investor

OceanWell develops deep-ocean desalination technology, described as "water farms," to produce drinking water, and is building its first commercial water farm with the Las Virgenes Municipal Water District. It works with public water agencies in California to supply water to their service areas.

1 investor

Swiss Vault develops hardware and software solutions for large-scale data storage and archival, serving data-intensive industries including genomics, telecommunications, seismic analysis, and astronomy. The company's systems combine custom hardware with proprietary file system software to enable rapid data access while reducing energy consumption and storage costs.

1 investor

Swiss Decode develops portable DNA detection devices that deliver results in under an hour, enabling evidence collection at the point of need without external laboratory testing.

1 investor

Swisspod develops hyperloop transportation technology aimed at high-speed, long-distance travel, operating a test site referred to as the Matterhorn Facility. The company works in the mobility and deeptech transportation infrastructure space.

1 investor

Syenex provides cell delivery technologies and contract development services for therapeutic cell engineering, serving biopharmaceutical companies developing cell-based therapies. The company integrates cell engineering and delivery capabilities with regulatory support for clinical development.

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

SYMX.AI provides AI-powered monitoring, real-time reporting, and predictive maintenance solutions for mining operations and equipment fleets. The company develops industrial intelligence platforms that optimize equipment maintenance and operational efficiency across open-pit and underground mining sites.

1 investor

Synapse, part of Capgemini Invent, provides design and technology innovation services focused on sustainability and climate solutions. The company helps clients reduce product carbon footprints, develop climate technologies, and build circular economy capabilities across energy, transportation, agriculture, and built environments.

1 investor

Synapse Semiconductor is a semiconductor research lab building image sensors that run neural-network computation directly on the sensor, integrating light capture and AI processing in each pixel to replace GPU-based edge vision. Its chips target computer vision applications in self-driving cars, drones, humanoid robotics, and space systems.

1 investor

SynaXG develops O-RAN infrastructure software and solutions that combine artificial intelligence with 5G and next-generation wireless technologies for telecommunications providers. The company serves both public and private network customers with cloud RAN, distributed RAN, fixed wireless access, and enterprise private 5G network solutions.

1 investor