Inside The Startup Building Reusable Rockets

Why It Matters

Fully reusable rockets could reduce launch costs and increase flight frequency, unlocking new markets and accelerating the commercialization of space.

Key Takeaways

• Stoke Space targets fully reusable two‑stage rockets, including re‑entry capsule.
• Their Andromeda stage uses liquid hydrogen heat shield for re‑entry.
• Raised nearly $1 billion, aiming for first orbital launch this year.
• In‑house manufacturing and software (Bolt Line) accelerate iteration cycles.
• Success could lower launch costs and enable new space‑based business models.

Summary

Stoke Space is tackling the holy grail of rocketry by building fully reusable two‑stage launch vehicles that can launch, return, and relaunch without discarding any major components. The company’s Nova first stage lands and re‑fuels like a conventional reusable booster, while the Andromeda upper‑stage capsule survives re‑entry using a novel liquid‑hydrogen‑cooled heat shield and a suite of small thrusters for precision landing.

The team highlights several technical and operational breakthroughs: a record‑efficient engine on Nova, a cryogenic heat‑exchanger system on Andromeda, and a vertically integrated factory capable of producing seven vehicles per year. With roughly $990 million raised, they have completed full‑engine tests, built a 168,000‑square‑foot manufacturing hub, and plan their inaugural orbital flight later this year. Their proprietary software platform, Bolt Line, ties together design, testing, and maintenance data to shrink iteration cycles from months to days.

Founders Andy and Tom, former Blue Origin propulsion engineers, recount starting in a backyard test cell and leveraging Y Combinator’s network to secure funding despite a pandemic‑era market freeze. A memorable quote likens the potential impact to an “iPhone app‑store moment,” suggesting that ubiquitous, low‑cost access will spark a wave of novel space‑based services. Their progress is underscored by milestones such as multiple structural qualification articles, cryogenic testing in Moses Lake, and a new launch complex at historic Cape Canaveral.

If successful, Stoke Space could slash launch costs, dramatically increase flight cadence, and democratize access to orbit, enabling new verticals—from satellite constellations to on‑demand cargo and crew transport. The shift from expendable to fully reusable rockets would reshape the economics of the space industry, fostering competition and accelerating the broader commercialization of space.

Original Description

Stoke Space is racing to build the world's first fully reusable rockets that can launch, survive reentry, and fly again and again. In this episode of Hard Tech, YC’s Aaron Epstein sits down with Stoke Space co-founders Andy Lapsa and Tom Feldman to find out why they chose to take on one of the hardest problems in rocket science, how an obsession with efficiency gives them an edge, and what full reusability could unlock for the future of spaceflight.

Apply to Y Combinator: https://www.ycombinator.com/apply

Work at a startup: https://www.ycombinator.com/jobs

Chapters:

00:00 — Intro

01:16 — Stoke Space’s mission: Rapid reusability

02:18 — Why Second Stage capsules fail reentry

03:34 — Stoke Space’s stage 2 solution

05:30 — Reusability-First Design Philosophy

07:25 — Early Engine Development & Test Strategy

10:48 — Vertical Integration & Manufacturing

11:21 — Iteration Speed as a Competitive Advantage

12:29 — Software as Core Infrastructure

14:00 — Path to Orbit & Launch Operations

15:04 — How This Could Change The World