Fundraising Fox
Parsimoni
Techstars '25Pau, FR · Founded 2023 · 6 employees on LinkedIn · 1 known investors
Find your way into Parsimoni
3,423 people in our graph can introduce you to the Parsimoni team.
Sign up to see every warm intro you have to Parsimoni
- Paths you didn't know you had: your email and LinkedIn already hold routes to the Parsimoni team. We find them
- 2nd- and 3rd-degree connections: the friend-of-a-friend routes you can't see from your own inbox or LinkedIn
- Answers now, not in days: momentum is everything in a raise. Skip asking around whether someone knows someone
Days of research, done the moment you sign in, with every route ranked by how warm it is.
Parsimoni builds SpaceOS, a payload operating system that enables satellite operators to monetize idle on-board compute capacity by safely running multiple applications with hardware-backed isolation. The platform allows operators to deploy, update, and manage satellite applications using familiar cloud development workflows.
Also known as SpaceOS
Founders & leadership
Parsimoni was founded in 2023 by Miklos Tomka.
Investors · 1
How we know: the Techstars portfolio · open dataset · Top 3000 Accelerator Startups (no YC) 2026-08 · Not right? Tell us
Company profile
researched Sep 2026Parsimoni is a French space software company developing SpaceOS, a secure-by-design, unikernel-based operating system for satellite payload computers. SpaceOS boots in its own partition on the payload on-board computer and is positioned as a complement to, rather than a replacement for, existing flight software: bus management, attitude, thermal and power control and other real-time or safety-critical functions remain on the operator's existing RTOS, while SpaceOS hosts non-real-time mission applications. Applications run as single-address-space virtual machines under KVM, Xen or Muen hypervisors, with hardware-enforced separation between applications and between the payload and the bus, so that a crashing application, a malicious workload or a radiation-induced memory upset remains contained.
The platform adds a lifecycle layer modelled on cloud engineering practice: applications are built, signed, pushed, deployed, monitored and rolled back through a command-line workflow, using an A/B partition scheme and content-addressable updates intended to work over intermittent, low-bandwidth links (down to 4 kbit/s). The company reports application images of roughly 10 MB compared with around 250 MB for conventional container stacks — a claimed 20x reduction — validated bit-for-bit against Thales Alenia Space workloads, along with up to 37% faster on-board AI inference. A second interface, SpaceOS Hub, is an operator-facing marketplace where an area of interest can be drawn, an application selected and candidate satellite "runners" compared; the company states on-board processing can cut downlink costs by up to 7x.
Parsimoni frames the market opportunity around underused payload processors: citing NASA JPL data putting average in-orbit compute utilisation near 10%, it estimates roughly $5B per year of on-board capacity that operators cannot currently monetise. Three application areas are promoted: on-board AI processing (downlinking insights rather than raw imagery), cyber-resilient payloads for defence, government and critical-infrastructure missions, and a satellite app store for third-party workloads.
Business model
Parsimoni licenses SpaceOS to satellite operators and distributes it alongside partner hardware. The company states it charges operators no upfront cost and instead participates in measurable value created — incremental revenue from new workloads hosted on the payload computer, or cost savings from moving processing on board. Development is additionally supported by funded public and collaborative programmes.
Revenue is described as upside-sharing with operators rather than licence fees paid in advance: Parsimoni takes a share of incremental revenue from newly hosted workloads or of the savings generated by on-board processing. A planned marketplace (SpaceOS Hub) would intermediate third-party applications running on operators' spare compute. The company also holds more than EUR 1.5M in funded project commitments across the ORCHIDE (Horizon Europe, with Thales Alenia Space), CEOS (BPI France 2030) and OSIP (ESA marketplace demonstration) programmes.
Traction
SpaceOS reached orbit in March 2025 aboard DPhi Space's Clustergate-1, launched on the SpaceX Transporter-13 mission, and again in March 2026 on Clustergate-2. The technology has been validated across eight on-board computers and multiple hypervisors, and bit-for-bit against Thales Alenia Space workloads. In the HACKSAT'25 exercise, 34 participants over eight weeks produced zero sandbox escapes. The company reports more than EUR 1.5M in funded project commitments across ORCHIDE, CEOS and OSIP, an ESA-backed satellite app store launching with OHB Hellas, and partnerships with Innoflight and Satlyt.
Latest developments
A December 2025 strategic partnership with space-based cloud service provider Satlyt covers technical and commercial interoperability for in-orbit computing. Parsimoni is working with Innoflight, announced in November 2025, to offer SpaceOS with the CFC-400XS flight computer in U.S. and European markets. SpaceOS flew again in March 2026 on Clustergate-2, and an ESA-backed satellite app store is being launched with OHB Hellas.
▸Full profile — market position, technology, go-to-market, geography, history
Market position
Parsimoni positions SpaceOS as a payload-side software platform layered on satellite hardware already in orbit, distinct from flight software and from new avionics. It works with established aerospace organisations including Thales Alenia Space, the European Space Agency, OHB Hellas, DPhi Space, Innoflight and Satlyt, and operates in a European and transatlantic space-computing market that also includes edge-compute and in-orbit processing entrants.
SpaceOS runs only on the payload partition, leaving certified bus and real-time flight software untouched, which lowers the integration barrier relative to replacing flight software. Its unikernel architecture yields roughly 10 MB application images versus about 250 MB for container stacks, reducing uplink time, hardware requirements and attack surface, while hardware-enforced isolation is intended to make hosting third-party code acceptable to operators. The commercial model removes upfront cost by tying payment to realised revenue or savings.
Technology
SpaceOS is a unikernel-based operating system with roots in the OCaml and MirageOS ecosystems, described by Innoflight as formally verified and by the company as secure-by-design. Each application is compiled with only the code it requires and runs as a single-address-space VM under KVM, Xen or Muen, giving hardware-backed isolation between applications and between the payload and bus partitions. Security features include zero-trust design, memory-safe code and post-quantum cryptography. The platform is hardware-agnostic and has been validated across eight on-board computers and multiple hypervisor substrates, requiring no new flight-qualified avionics. Deployment tooling covers build, local test (e.g. Firecracker microVMs), signed manifests, CFDP uplink, A/B partitions and rollback.
Go-to-market
Parsimoni goes to market through partnerships with hardware suppliers and satellite platform operators rather than direct hardware sales: SpaceOS is offered alongside Innoflight's CFC-400XS compact flight computer for U.S. and European customers, demonstrated on DPhi Space's Clustergate hosted-payload platform, and taken to interoperability discussions with space-based cloud provider Satlyt. Co-funded programmes with ESA, Horizon Europe/Thales Alenia Space and BPI France also serve as validation and entry channels, complemented by a developer CLI and an operator marketplace.
Satellite operators and mission owners, including commercial Earth-observation and hosted-payload providers, plus defence, government and critical-infrastructure programmes requiring cyber-resilient payloads. Secondary users are application developers building software to run on third-party satellites, and flight-computer manufacturers bundling the OS with their hardware.
Geography
Headquartered in Pau, France, with development and deployment partners across Europe, the United States and Australia. Partner organisations referenced include DPhi Space (Switzerland), Innoflight (San Diego, United States), OHB Hellas (Greece) and Thales Alenia Space.
History
Work on SpaceOS was publicly introduced in a July 2023 post by Thomas Gazagnaire, framed around OCaml and MirageOS unikernel technology and sustainable, long-lived software infrastructure. In February 2025 Parsimoni announced a partnership with Swiss hosted-payload provider DPhi Space to demonstrate SpaceOS in orbit on Clustergate-1 via SpaceX Transporter-13, with the launch reaching orbit in March 2025. In November 2025 Parsimoni and Innoflight announced a partnership to offer the CFC-400XS flight computer with SpaceOS for U.S. and European customers, and in December 2025 Satlyt announced a strategic partnership with Parsimoni on in-orbit computing interoperability. A second in-orbit deployment followed on Clustergate-2 in March 2026.
Compiled by commissioned research from 8 cited public sources — 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 — not independently audited.
Timeline · 6
launches, deals, and filingsSpaceOS flew a second in-orbit deployment in March 2026 on DPhi Space's Clustergate-2.
Parsimoni reports more than EUR 1.5 million in funded project commitments across ORCHIDE (Horizon Europe, with Thales Alenia Space), CEOS (BPI France 2030) and OSIP (ESA marketplace demonstration).
Space-based cloud service provider Satlyt entered a strategic partnership with Parsimoni to explore technical and commercial interoperability for in-orbit computing.
Innoflight, a San Diego-based supplier of cyber-secure space avionics, and Parsimoni announced a strategic partnership to develop and deliver Innoflight's Compact Flight Computer CFC-400XS equipped with SpaceOS for U.S. and European customers.
SpaceOS reached orbit in March 2025 aboard DPhi Space's Clustergate-1 hosted-payload platform.
Parsimoni and Swiss hosted-payload platform provider DPhi Space announced a strategic partnership to fly SpaceOS on the maiden Clustergate-1 flight aboard SpaceX's Transporter-13 mission, validating the unikernel-based payload OS in an operational environment.
Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.
▸Research sources · 8
primary sources listed
- Parsimoniparsimoni.co · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Parsimoni do?
- Parsimoni develops SpaceOS, a unikernel-based payload operating system that lets satellite operators run and monetize on-board apps.
- Who founded Parsimoni?
- Parsimoni was founded by Miklos Tomka in 2023.
- Who are Parsimoni's investors?
- Parsimoni's investors include Techstars.
- Where is Parsimoni headquartered?
- Parsimoni is headquartered in Pau, FR.