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Reditus Space

YC W25

Atlanta, US · Founded 2024 · 12 employees · Hiring · 13 known investors

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Reditus Space builds reusable spacecraft systems that enable routine return of cargo from low Earth orbit, supporting in-space manufacturing and physical industrialization of space. The company provides infrastructure for commercial operators and manufacturers to deliver products and materials back to Earth economically.

Advanced ManufacturingDeep TechDefense TechHardwareSpace TechHard TechManufacturingAerospaceUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (W25)

Reditus Space was founded in 2024 by Stef Crum and Will Sherman.

SCStef Crum
Stef CrumCEO & Co-FounderStef Crum holds a PhD in space systems engineering and has worked with NASA and the Space Force on orbital operations and reentry tasks. He previously founded Da Vinci Satellite, a satellite mission nonprofit, and now serves as CEO of Reditus Space.30 Under 30 2026
WSWill Sherman
Will ShermanCTO - Co-FounderWill Sherman is the CTO of Reditus Space and studied at Georgia Tech.30 Under 30 2026
EW
Evan WiseLead Structures Engineer
EK
Ed Kokanedkokan@reditusspace
CV
Caden VirantGround Infrastructure Intern
BR
Bethany RichardsOffice Administrator

Investors · 13

Y Combinator✓ confirmed by Reditus SpaceSan Francisco · $500K

How we know: the company's own site · the Y Combinator directory · funding news · open dataset · 5k.vc investor directory · Not right? Tell us

Aera VClisted by Aera VCSingapore · $25K – $5M

How we know: Aera VC's portfolio page · the VCSheet dataset · open dataset · 5k.vc investor directory · Y Combinator's founder network · Not right? Tell us

HEC Paris Incubatorlisted by HEC Paris IncubatorJouy-en-Josas

How we know: HEC Paris Incubator's portfolio page · Not right? Tell us

TRAC (Third Round Analytics Capital)listed by TRAC (Third Round Analytics Capital)San Francisco · $250K – $2Mvia Fred Campbell · inferred

How we know: Y Combinator's founder network · Not right? Tell us

Transpose Platform Managementlisted by Transpose Platform ManagementSan Francisco

How we know: Transpose Platform Management's portfolio page · Y Combinator's founder network · Not right? Tell us

468 CapitalreportedBerlin

How we know: the VCSheet dataset · Y Combinator's founder network · Not right? Tell us

Dnx VenturesreportedTokyo · $1M – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Georgia Tech FoundationreportedAtlanta

How we know: Y Combinator's founder network · Not right? Tell us

Lobster CapitalreportedSan Francisco

How we know: Y Combinator's founder network · Not right? Tell us

OurCrowdreportedJerusalem

How we know: Y Combinator's founder network · Not right? Tell us

Tekedia CapitalreportedLagos · $1K

How we know: Y Combinator's founder network · Not right? Tell us

Venture Investment AssociatesreportedPeapack

How we know: Y Combinator's founder network · Not right? Tell us

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

The YC application· Winter 2025 batch

Alumni Q&A

How did your company get started? (i.e., How did the founders meet? How did you come up with the idea? How did you decide to be a founder?)
The founders met in graduate school at Georgia Tech, where both were pursuing PhDs in aerospace engineering.

Summarized from the founders' answers on their Y Combinator profile.

Images

Reditus Space photo

Related companies · 10

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Lucid BotsLucid Bots designs and manufactures commercial robotics and drones for exterior cleaning and building maintenance in the construction and facilities management industries. The company's Sherpa cleaning drone performs high-reach tasks for professional contractors, property managers, universities, and medical facilities.
SingularitySingularity manufactures counter-weapon systems and air defense equipment designed to protect military personnel and civilians. The company focuses on producing affordable, mass-produced defense technology to help the US and allied nations maintain defensive capabilities against evolving threats.
Proteus SpaceProteus Space designs custom spacecraft buses tailored to individual payload requirements using generative design and flight-proven components, eliminating the compromises of standardized bus solutions.
VendraVendra connects manufacturers with a network of qualified US-based suppliers to produce custom parts, managing the full process from quote aggregation to delivery for aerospace and defense companies.
Capella SpaceCapella Space designs, builds, and operates synthetic aperture radar (SAR) satellite constellations that provide all-weather, day-and-night Earth observation imagery at sub-0.25m resolution. It offers an automated end-to-end tasking and data delivery platform serving defense and intelligence, maritime, disaster response, and infrastructure monitoring customers.
GroundControlGroundControl is a vertical SaaS platform for regulated manufacturers in aerospace, defense, automotive, and life sciences that automates quality workflows including inspections, compliance reporting, and data validation using AI and OCR to replace legacy systems and spreadsheets.
Sidus SpaceSidus Space is a space and defense technology company that builds LizzieSat satellites, edge-computing and avionics hardware, and AI-driven software (Orlaith, FeatherEdge, Cielo) for turning satellite and sensor data into near real-time intelligence. It serves government, defense, intelligence, and commercial customers, offering satellite manufacturing, mission operations, and 24/7 payload support across NASA, DoD, and commercial programs.
Sierra SpaceSpace company developing the Dream Chaser commercial spaceplane and the LIFE habitat for a next-generation LEO space station.
SidereusSidereus Space Dynamics was a space technology research and development company operating in Italy and Europe. It has concluded its R&D program and is now in discussions with industrial partners regarding the potential acquisition of its technology assets, infrastructure, and intellectual property.

Companies working in the same space as Reditus Space.

Legal entities · 1

corporate structure
Reditus Space Inc.

In the news

Reditus Space: Reusable Satellites for zero-g manufacturingycombinator.com · Feb 2025

Frequently asked questions

What does Reditus Space do?
Reditus Space builds reusable spacecraft systems that enable routine return of cargo from low Earth orbit, supporting in-space manufacturing and physical industrialization of space. The company provides infrastructure for commercial operators and manufacturers to deliver products and materials back to Earth economically.
Who founded Reditus Space?
Reditus Space was founded by Stef Crum, Will Sherman in 2024.
Who are Reditus Space's investors?
Reditus Space's investors include Antler, Y Combinator, Aera VC, HEC Paris Incubator, TRAC (Third Round Analytics Capital), Transpose Platform Management, 468 Capital, Dnx Ventures and 5 more.
Where is Reditus Space headquartered?
Reditus Space is headquartered in Atlanta, US.