Nov 12, 2025 11:32:16 PM

Companies


Showing 251-275 of 322 companies
YC S24
Sensei logo

Sensei

Robotic Training Data at Scale

Sensei helps robotics companies scale and outsource their training data collection. Our hardware platform enables the collection of human-demonstration data at a tenth of the cost and twice the speed of current teleop approaches. Our software platform acts like Scale AI for robotics data: a large network of paid human operators use our low-cost collection platform to fulfill data-generation requests.

YC W22
Shinkei Systems logo

Shinkei Systems

Robots for longer-lasting, better-tasting fish at scale.

1.2B lbs of fish are caught everyday yet as little as 1 in 3 fish make it to a plate — most of this waste arises because fish are suffocated on boats or electrocuted on farms. Suffocation and inaccurate electrocution create stress and so acidify meat, damage quality and significantly reduce shelf-life. Artisanal techniques in high-end sushi multiply shelf-life and taste but, because of the variation in fish, are difficult to perform in a mechanical fashion. Shinkei automates traditional techniques using robotics to provide long-lasting and delicious fish for farmers and harvesters at scale.

YC W18
Shone logo

Shone

Shone makes existing cargo ships autonomous through retrofit.

YC S24
Silurian logo

Silurian

Foundation models to simulate Earth, starting with weather.

Silurian is building foundation models for simulating Earth, starting with weather. From assessing the risk of wildfires to predicting the energy grid load, we provide an infrastructure layer for our planet. Our frontier models push the boundaries of what can be simulated on Earth and improve decision making across vital sectors including energy, insurance, agriculture, and logistics.

YC W17
Sinovia Technologies logo

Sinovia Technologies

Flexible printed OLED displays.

We use the printing methods used for newspapers, packaging, posters, and other graphic media to make beautiful, emissive electronic displays with high-end OLED technology aimed at low-cost applications. Our displays are paper-thin, flexible, and can be easily custom printed in a variety of shapes and sizes, allowing hardware designers to use displays and indicators on curved surfaces and in new ways.

YC S17
Skyscrape logo

Skyscrape

Skyscrape makes temperature-responsive insulation

Skyscrape makes temperature responsive fabrics for a new type of clothing. These fabrics literally change shape in response to a change in temperature: the fabrics become thicker and insulate more as the temperature drops, and they become thinner and insulate less as the temperature rises again. This "intelligent insulation" has no wires or sensors, and the fabric's shape-changing behavior comes from a natural materials response. Skyscrape’s fabrics offer expanded thermal comfort across a wider temperature range than conventional clothing. Creating textiles that could change shape with changing temperatures required years of laboratory work by an interdisciplinary team of scientists, engineers, designers, and weavers, designing and refining machines and processes to make yarns and fabrics that could adapt to the environment. Skyscrape's first market entry was with Ralph Lauren in the 2022 Team USA Winter Olympics Opening Ceremony.

YC S17
Skyways logo

Skyways

Creating a new form of air transportation to advance our civilization

YC S24
Sorcerer logo

Sorcerer

Building a nervous system for the atmosphere

Sorcerer is deploying a global network of persistent airborne sensors to fuel advanced weather forecasting. Our high-altitude balloons collect 1000x more data than existing systems and are already used daily by meteorologists to track extreme weather across the US and Central America.

YC W19
SpaceRyde logo

SpaceRyde

The Rocket Network: Sustainable & On-Demand Delivery Anywhere in Space

SpaceRyde is building the future of space cargo transportation to facilitate and encourage necessary in-space developments, innovations and economy. SpaceRyde is the only sustainable mode of space transportation. Its innovative system utilizes a stratospheric balloon to bypass the atmosphere without emissions nor depositing black particles into the ozone layer and is the world’s first and only multi-functional rocket. After completing its initial mission, the vehicle will remain powered in orbit and joins its rocket network until assigned its next in-space mission, including tasks such as; refuelling, deep space missions, space junk removal and de-orbiting. SpaceRyde’s story began in 2018 with husband-wife founders Saharnaz Safari and Sohrab Haghighat and the dream of eliminating the barriers to innovation in space. The company is now a rapidly growing team of over 30 employees with a 25,000-square-foot rocket factory and state-of-the-art engine groundworks facility.

YC S24
Spaceium Inc logo

Spaceium Inc

In-Space Refueling

Spaceium builds fully automated space stations to refuel and repair spacecraft. We have secured $86.1 million in binding commercial contracts and have an additional $230 million in the pipeline. Additionally, we have 1 billion dollars in letters of intent. We have successfully tested our hardware, which will launch to space next year. Our fully automated space stations will efficiently store and transfer both cryogenic (extremely cold) and non-cryogenic fuels with zero loss during storage and transfer. And they can transfer fuel seamlessly to any spacecraft design using our proprietary modular robotic arm. Our customers include launch vehicles, orbital transfer vehicles, moon landers, and spacecraft that benefit from increased payload capacity and extended travel capabilities. Our long-term vision is to build service hubs along the space superhighway to connect Earth to Moon and Mars and help humanity to become multi multi-planetary species

YC W25
Splash Inc. logo

Splash Inc.

Autonomous patrol-boats for National Security

Splash is developing the next generation of autonomous surface vessels (ASVs) to provide National Security and defend critical assets such as oil rigs and shipping terminals. Our long-term vision is to make traditional naval vessels obsolete by creating a fleet of low-cost and versatile boats which will be able to dominate the seas. Our expertise in mass manufacturing, engineering and quickly scaling operations will make this vision a reality.

YC S24
Starcloud logo

Starcloud

Data centers in space

(Formerly known as Lumen Orbit) Starcloud is building data centers in space, initially to provide GPU compute to other satellites, and later to address the rapidly growing demand for energy caused by the deployment of AI. Falling launch costs give us access to abundant energy, passive cooling, and the ability to rapidly scale in space. In Partnership with NVIDIA's Inception Program, we are launching our demonstrator satellite in late 2025, which will have 100x more powerful GPUs than have ever been operated in space.

YC W24
Starlight Charging logo

Starlight Charging

Ultra-low-cost EV charging for condos and apartments

Starlight Charging offers ultra-low-cost EV-charging to condos and apartments. Our power-balancing software enables our network of installers to install chargers without expensive infrastructure upgrades, cutting the cost by 10x compared to any other option. Through Starlight's Partner Program, electricians and small business owners can create their own charging network and generate passive income with owner-operated charging stations using Starlight battle-tested software.

YC S16
S

Starsky Robotics

Driverless Trucks, for real.

Starsky Robotics is an autonomous truck startup aiming to make our roads safer while providing truck drivers with jobs that bring them back to their families. Learn more at: www.starsky.io Interested in joining the team? Apply at: https://jobs.lever.co/starskyrobotics?

YC S20
Statiq. logo

Statiq.

India's Largest EV charging network

Statiq connects electric vehicle owners to EV chargers. EV owners can discover chargers near them, pre-book a slot and pay for the usage conveniently. Property owners can buy, share their chargers, manage them and earn by becoming charger hosts with Statiq. Our EV chargers can be found at shopping malls, workplaces, restaurants , hotels, residential spaces.

YC W25
Steinmetz logo

Steinmetz

Hardware for Electric Vehicles.

Steinmetz is an electric vehicle platform company based in San Francisco. We use new power electronics techniques to significantly improve power densities (kW/kg, kW/L) bringing down vehicle system costs and even unit costs. Our first products are Inverters/motor controllers with industry-leading power densities while remaining cost competitive.

YC W21
Stoke Space logo

Stoke Space

We’re on a mission, and it starts with 100% reusable rockets.

Stoke Space delivers goods to and from orbit using 100% reusable rockets designed to fly daily.

YC W23
Stralis Aircraft logo

Stralis Aircraft

Emission free hydrogen electric aircraft

Our planes fly 10 times further than battery electric alternatives, with a lower operating cost than fossil fuel powered aircraft. Our first product is a 15 seat aircraft with a range of 800 km that enters service in 2026 with launch customer Skytrans. Our team has over 85 years of aerospace experience and have developed, flight tested and certified aircraft at Google X, magniX, Heart Aerospace, Ampaire, Airbus, Boeing, Bombardier and Gulfstream. We have $145M in aircraft LOIs from 7 airlines in the US, Europe and Australia.

YC W20
StratumAI logo

StratumAI

AI that tells mining companies where to mine to maximize profits

The mining industry drills narrow holes in the ground called drillholes to identify how much gold is in a ground at any spot. These holes are expensive so the industry uses statistical interpolation to predict what's in between these holes. Stratum replaces these traditional methods by utilizing deep learning to better predict both where to best drill and how much gold is in between these holes. This technology is not limited to gold and has been demonstrated to work on other metals, including base metals like copper. Based on Stratum's current pilots, our technology is projected to create ~10M in annual value for the average mine.

YC F25
Stratus Aviation logo

Stratus Aviation

AI-powered intelligence layer for airports

Airports are among the most data-rich yet information-poor environments in transportation. Thousands of radio transmissions, aircraft movements, and sensor signals occur every second, but these systems remain siloed. Most airfields still rely on manual logs and calls to understand what’s happening on the ground, creating blind spots that slow coordination and limit safety oversight. The result is a growing safety and efficiency gap. The FAA records four to five runway incursions every day, and over 90% of air traffic control facilities are operating below target staffing levels. Despite $20 billion in modernization programs like NextGen and Safety Management Systems, airports still lack a unified data backbone that connects communication, movement, and intent across the airfield. Stratus provides the missing layer of intelligence for airport and airside operations — unifying data, communication, and movement into one shared, real-time picture. For airports, this means faster decisions, clearer accountability, and safer, more efficient operations. For aviation as a whole, it’s the foundation for connected, data-driven infrastructure that can finally keep pace with modern airside complexity.

YC S15
SunFarmer logo

SunFarmer

Reliable and affordable solar energy in developing countries.

SunFarmer provides affordable solar energy for hospitals, schools, businesses, and farms in developing countries. In many parts of the world, electricity is unavailable, unstable, or extremely expensive. Yet reliable electricity is critical for high quality healthcare, modern education, economic development, and improved agricultural productivity. Learn more at sunfarmer.org

YC S17
Sunfolding logo

Sunfolding

Sunfolding builds next generation infrastructure for solar farms. By…

Sunfolding was founded in 2012 with headquarters in San Francisco, CA. Sunfolding designs, manufactures and sells balance of system products that offer cost and performance breakthroughs to stakeholders across the solar industry. Currently, Sunfolding’s main product offering is an advanced solar tracker, Sunfolding T29™ Horizontal Single Axis Tracker. Sunfolding’s executive team has collectively built and sold GWs of solar globally, successfully launching new solar products and technologies at leading solar companies including First Solar, SMA America, Kaco, and SunPower. The Sunfolding team is a blend of top technical talent with recognized industry leaders

YC X25
Sygaldry Technologies logo

Sygaldry Technologies

quantum-accelerated AI servers

We’re building quantum-accelerated AI servers so organizations building AI can exponentially speed up training and inference. And we’re making tools for AI researchers to integrate quantum capabilities into AI models and workflows.

YC W20
Talyn Air logo

Talyn Air

Long range, battery electric vertical take-off and landing aircraft.

Talyn is making long-range electric vertical take-off and landing (eVTOL) aircraft for cargo. We get fixed-wing performance with VTOL capability by making an electric fixed wing aircraft that is caught mid-air with a custom winged drone, enabling it to take-off and land vertically.

YC W19
Taobotics logo

Taobotics

Autonomous robots for retails.