# Wardstone

> Wardstone is a Y Combinator F25 defense startup building a global constellation of satellites equipped with space-based interceptors to kinetically destroy hypersonic and ballistic missiles. Founded by brothers Sebastian and Tobias Fischer, the company is pursuing America's Golden Dome initiative - a layered missile defense system that can engage threats in space before they reach US soil. With a $5M seed round and three successful automated intercept demonstrations during YC, Wardstone is positioning itself as a next-generation missile defense contractor targeting a $40B/year market.

- **Founded:** 2025
- **Headquarters:** El Segundo, California, USA
- **Founders:** Sebastian Fischer (CEO & Co-Founder), Tobias Fischer (CTO & Co-Founder)
- **Team size:** 2-10 employees
- **Products:** Hailstorm Interceptor, Golden Dome Satellite Constellation
- **Notable:** Placed 2nd at YC F25 Product Showcase at Demo Day, Demonstrated three successful automated missile intercepts using ground-based system during YC program, Built fully automated missile tracking and intercept system with infrared computer vision

## Products & services

- **Hailstorm Interceptor** — Space-based interceptor that deploys high-speed clouds of buckshot (1 km diameter particle clouds) to kinetically destroy hypersonic missiles in flight.
- **Golden Dome Satellite Constellation** — Multi-layer integrated missile defense system - a global constellation of satellites with both sensors and space-based interceptors capable of detecting and destroying ballistic, hypersonic, and cruise missiles. Can engage threats before launch or during flight. Deployment targeted for 2028.

## Achievements

- Placed 2nd at YC F25 Product Showcase at Demo Day
- Demonstrated three successful automated missile intercepts using ground-based system during YC program
- Built fully automated missile tracking and intercept system with infrared computer vision
- Raised $5M seed round from 7 investors in November 2025
- First prototype interceptor planned for launch on supersonic sounding rocket in April 2026

## Latest updates

- **2026-04** — First prototype interceptor planned for launch on supersonic sounding rocket
- **2025-11** — Raised $5M seed round led by Y Combinator with Pioneer Fund, Nova Threshold, Liquid 2 Ventures, Bow Capital, B5 Capital, and Allegis Capital
- **2025-10** — Placed 2nd at YC F25 Demo Day Product Showcase; demonstrated three successful automated missile intercepts

## Links

- Website: https://wardstone.space
- LinkedIn: https://www.linkedin.com/company/wardstone

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Profile page: https://yespress.io/wardstone
Published by YesPress — https://yespress.io
Last updated: 2026-04-21