Inversion Space
YC S21Los Angeles, US Β· Founded 2021 Β· 28 employees Β· 14 known investors
Inversion develops spacecraft and systems to establish Low-Earth Orbit as an on-demand logistics network for rapid global transportation and defense applications. The company manufactures reentry vehicles and related hardware to enable cargo transportation across Earth via space.
Also known as Inversion Β· Inversion Space Co.
Founders & leadershipΒ· Y Combinator alumni (S21)
Inversion Space was founded in 2021 by Justin Fiaschetti and Austin Briggs.
Investors Β· 14
Also in the syndicate Β· 1
Funding
SEC filings, press & company announcements$44M disclosed across 1 of 3 rounds Β· 2021β2024
- $44MraisedNov 2024 Β· 3 sourcesSource β
Source: company announcements and press reports β follow each round's link for the claim.
Company profile
researched Aug 2026Inversion Space is an American aerospace and defense technology startup developing space-based delivery vehicles β autonomous reentry capsules intended to hold cargo in Low-Earth Orbit and return it to a designated point on Earth on demand. The company describes its vehicles as designed to deploy anywhere on Earth in under an hour, survive extreme reentry conditions and land with high precision, and characterizes the technology as inherently dual-use, aimed first at national security requirements with later commercial applications.
The company has two publicly identified vehicles. Ray is its first in-house developed spacecraft and reentry capsule, built as a subscale pathfinder to validate subsystems for later vehicles; per company material, nearly every system aboard was developed internally by a team of about 25 people with a bill of materials under $1 million. Arc, unveiled in October 2025, is the flagship space-based delivery vehicle, described as autonomous, reusable and low-cost, capable of storing cargo in orbit and reentering on demand; The War Zone and Wikipedia report a payload capacity of 500 pounds. Beyond delivery, Inversion positions its vehicles as a platform for collecting data during reentry, testing hardware in space and returning it for analysis, and for hypersonic flight testing.
Inversion's earlier public framing (2021-2024) centered on returning cargo from orbit more broadly: resupply and return for commercial space stations, return of microgravity-manufactured materials, and, longer term, return of materials from the Moon or asteroids. By 2024-2026 its public messaging had narrowed toward military logistics β "warehouses in space" β hypersonic testing, and space-based interceptors.
Founding story
Inversion Space was founded in 2021 by Justin Fiaschetti and Austin Briggs, who were students at Boston University. The company entered Y Combinator's Summer 2021 batch and was covered at YC Demo Day as a startup focused on bringing things back from space rather than launching them there. It was initially based in Torrance, California, and later described as headquartered in Los Angeles. Fiaschetti serves as co-founder and CEO.
Business model
Inversion designs and manufactures its own spacecraft and subsystems in-house, including parachutes, which most rocket companies outsource. Revenue paths described in sources include government contracts and awards (SpaceWERX/AFRL STRATFI, a Kratos subcontract under MACH-TB 2.0), and future services in which cargo is pre-positioned in orbit and delivered on demand, plus use of the capsule as a platform for in-space testing with return of hardware for ground analysis.
Sources indicate government contracts and awards as the current identifiable funding/revenue channels (a $71 million SpaceWERX STRATFI agreement combining government and private funding, and a contract from Kratos under the MACH-TB 2.0 program), alongside an intended service model of on-demand cargo delivery and in-space testing/return for commercial and government customers. Pricing details are not disclosed in the sources.
Traction
Cumulative disclosed private funding of $54 million ($10 million seed plus $44 million Series A) as of November 2024, plus a $71 million SpaceWERX STRATFI award. FAA reentry license obtained October 2024. First orbital mission, Ray, launched January 14, 2025 on Transporter-12; it operated on orbit and performed two cold-flow delta-V maneuvers but did not reenter. Selection for the MACH-TB hypersonic testing program (March 2025) and a Kratos contract under MACH-TB 2.0 (September 2025). Arc unveiled October 2025 with a first flight previously planned for 2026. Headcount reported at 25 employees in November 2024 with plans to reach about 70; Y Combinator lists a team size of 28.
Latest developments
In September 2025 Inversion announced a Kratos contract under the $1.45 billion MACH-TB 2.0 hypersonic test program. On October 1, 2025 it unveiled Arc and published autonomous precision drop testing footage. In February 2026 it published a position piece advocating commercial launch cadence for scalable hypersonic testing. In May 2026 it announced a partnership with Anduril on space-based interceptors for the Golden Dome SBI program. In July 2026 NBC News covered its orbital cargo testing for global delivery. One aggregator lists a $27 million round dated September 2025, though this appears in a page that conflates multiple companies named Inversion and is not corroborated elsewhere.
βΈFull profile β market position, technology, go-to-market, geography, history, risks & controversies
Market position
Inversion is one of a small number of companies pursuing commercial reentry and return-from-orbit capability; TechCrunch reported it as the third company to receive a spacecraft reentry license from the FAA, while a company press summary described it as the second granted reentry approval under Part 450. Third-party sector databases classify it under cargo transportation and landers / reentry transport services alongside players such as ATMOS Space Cargo and other reentry vehicle developers. Wikipedia lists it among U.S. spaceflight companies based in California.
Sources emphasize vertical in-house development, including parachute design and manufacture that peers typically outsource, and low-cost rapid iteration β the Ray spacecraft built by roughly 25 people for under $1 million in materials. The stated positioning is orbit as a logistics layer rather than a destination, with autonomous reentry vehicles offering delivery timelines (under an hour, or roughly 45 minutes) unattainable by air or sea, and dual-use application spanning defense delivery, hypersonic testing and interceptors.
Technology
Core technology is an autonomous, reusable reentry capsule capable of on-orbit storage, maneuvering, controlled reentry through extreme heating environments, and precision landing under parachute. The Ray pathfinder was developed largely in-house, including its propulsion and avionics, by roughly 25 people for a bill of materials under $1 million, and demonstrated on-orbit stability, telemetry and two cold-flow delta-V maneuvers. The company builds its own parachutes and has publicized autonomous precision drop testing. Arc is described as storing cargo in orbit β reportedly up to five years per one aggregator β and deorbiting on demand with a 500-pound payload.
Go-to-market
Inversion pursues U.S. defense programs directly and through primes and program integrators β a SpaceWERX/AFRL STRATFI award, a subcontract from Kratos on the MACH-TB 2.0 hypersonic test bed, and partnership with Anduril on space-based interceptors for Golden Dome. It has also taken a corporate-strategic investor, Lockheed Martin Ventures, which the CEO said provides access to Lockheed Martin's engineering expertise and testing facilities in reentry systems. Public-facing activity includes a factory unveiling event for Arc, blog technical deep-dives, and national media coverage.
Defense and government customers, principally the U.S. military, for rapid resupply of medical supplies, battlefield gear and small surveillance drones, and for hypersonic test capacity; commercial customers for microgravity/in-space testing, return of materials, and resupply and return for future commercial space stations. Sources also cite longer-term potential for returning materials from the Moon or asteroids.
Geography
Headquartered in Los Angeles, California, with an earlier base in Torrance, California; the company held the Arc unveiling at its Los Angeles factory and said in late 2024 it planned to move into a new facility. Area served is listed as the United States. Launches to date have used SpaceX rideshare missions from Vandenberg Space Force Base, with the Ray reentry planned to splash down off the California coast.
History
After the 2021 founding and YC Summer 2021 batch, Inversion raised a $10 million seed round announced in November 2021. In May 2024 it publicly described a "warehouses in space" concept for military logistics. In September 2024 it was awarded a $71 million STRATFI agreement from SpaceWERX and the Air Force Research Laboratory. In October 2024 it received a spacecraft reentry license from the FAA under Part 450 for its Ray demonstration mission, and in November 2024 closed a $44 million Series A. Ray launched on SpaceX's Transporter-12 rideshare from Vandenberg Space Force Base on January 14, 2025; the flight validated on-orbit operation and conducted two cold-flow delta-V maneuvers, but the vehicle could not reenter due to a propulsion-related failure (an over-current event on a bipolar junction transistor used to trigger the engine's ignition spark plug). In March 2025 the US military selected Inversion for the MACH-TB hypersonic testing program, and in September 2025 it announced a contract from Kratos under the $1.45 billion MACH-TB 2.0 program of record. Arc was unveiled on October 1, 2025 at the company's Los Angeles factory. In May 2026 the company announced work with Anduril on space-based interceptors under the Golden Dome / SBI program.
Risks & controversies
The first orbital mission, Ray, failed to complete reentry in 2025 due to a propulsion issue β an over-current event on a bipolar junction transistor used to trigger the ignition spark plug β leaving the core reentry and precision landing capability not yet demonstrated in flight. Arc's first flight, planned for 2026 at the time of the Series A, and the full-scale demonstration mission depend on continued development funding, with the CEO stating the Series A was sufficient only through Arc's first flight. The business is heavily dependent on U.S. defense programs and government awards. Sources also note licensing and regulatory complexity for reentry. Reported funding figures differ across aggregators ($54 million vs. $81 million total), and at least one aggregator conflates Inversion Space with unrelated companies named Inversion.
Compiled by commissioned research from 8 cited public sources β announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed β not independently audited.
Competitors Β· 1
by search overlapCompanies competing with Inversion Space for the same Google search keywords, organic and paid, via search-intersection analysis.
Non-dilutive funding Β· 5 SBIR/STTR awards
Federal grants β no equity taken| Agency | Phase | Year | Amount |
|---|---|---|---|
| U.S. Air ForceAir Force | Phase II | 2023 | $1.7M |
| U.S. Air ForceAir Force | Phase II | 2022 | $1.2M |
| U.S. Air ForceAir Force | Phase ISTTR | 2022 | $250K |
| U.S. Air ForceAir Force | Phase ISTTR | 2022 | $250K |
| U.S. Air ForceAir Force | Phase I | 2022 | $48.5K |
Source: SBIR.gov award data (U.S. Small Business Administration). SBIR/STTR awards are competitive federal R&D grants and contracts β non-dilutive capital alongside any venture rounds above.
Timeline Β· 12
launches, deals, and filingsInversion announced it is working with Anduril and other partners on space-based interceptors under the SBI program for homeland defense.
Inversion unveiled Arc, an autonomous, reusable reentry vehicle for on-demand delivery of cargo to anywhere on Earth in under an hour, with hypersonic testing capability. The unveiling took place at the company's Los Angeles factory.
Inversion announced a contract from Kratos to support hypersonic testing under the Multi-Service Advanced Capability Hypersonic Test Bed (MACH-TB) 2.0 Program of Record.
SpaceNews reported Inversion completed the flight of the Ray vehicle but without reentry; the company attributed the failure to an over-current event on a bipolar junction transistor used to trigger the engine ignition spark plug.
SpaceNews reported the US military tapped commercial space firms, including Inversion, for its hypersonic testing program.
Ray launched from Vandenberg Space Force Base on the Transporter-12 rideshare mission; the spacecraft separated, achieved stable on-orbit operation and performed two cold-flow delta-V maneuvers.
Series A with participation from Lockheed Martin Ventures, Kindred Ventures and Y Combinator, bringing total funding to $54 million. Funds earmarked for Arc development, headcount growth from 25 to about 70, and a move to a new facility.
$44M source β
Inversion received a spacecraft reentry license from the FAA for its first mission; TechCrunch described it as the third company to obtain such a license, while a company-sourced release described it as the second approval under Part 450.
Strategic Funding Increase agreement combining government and private funding to support reentry vehicles tailored for military customers, accelerating a full-scale demonstration mission targeted as soon as 2026.
$71M source β
SpaceNews reported Inversion is developing a reusable capsule to store supplies in orbit and deliver them anywhere on Earth on demand, with cargo ranging from medical supplies to battlefield gear and small surveillance drones.
SpaceNews reported Inversion raised $10 million to develop a 'return vehicle' for space cargo; Spark Capital co-founder Santo Politi cited the lack of return options in the industry.
$10M source β
TechCrunch covered Inversion Space among startups from Day 2 of YC's Summer 2021 Demo Day, describing its focus on bringing things back from space.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
In the news
βΈResearch sources Β· 8
primary sources listed
- Inversion Spaceinversionspace.com Β· web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Inversion Space do?
- Los Angeles startup building autonomous reentry vehicles to store cargo in orbit and deliver it anywhere on Earth in under an hour.
- Who founded Inversion Space?
- Inversion Space was founded by Justin Fiaschetti, Austin Briggs in 2021.
- Who are Inversion Space's investors?
- Inversion Space's investors include Spark Capital, Y Combinator, ACADEMY INVESTOR, AIN Ventures, Das & Co., Dorm Room, Grit Ventures, Homebrew and 5 more.
- How much funding has Inversion Space raised?
- Inversion Space has disclosed $44M raised across 1 of its 3 known rounds.
- Where is Inversion Space headquartered?
- Inversion Space is headquartered in Los Angeles, US.







