Space Due Diligence: How to Run Commercial and Technical CDD/TDD on a Space Company

Insider Brief

• Space due diligence differs from generic CDD/TDD in four ways: demand is program-linked rather than calendar-linked, regulatory overlay (ITAR/EAR) reshapes addressable market, spaceflight heritage drives commercial position, and technical substitution analysis requires engineering judgment on mission fit.
• Serious commercial due diligence in space tests six things: bottom-up demand construction, program-linked revenue concentration, spaceflight heritage, competitive positioning, dual-use customer exposure and regulatory overlay.
• Serious technical due diligence in space tests five things: performance against mission requirements, qualification and flight-heritage path, SWaP-C trade-offs, integration risk with bus and payload, and supply-chain criticality.
• The “must-believe” diligence frame, articulating what has to be true for the thesis to hold, then testing each belief against evidence, is the standard format for decision-ready outputs in the sector.

Generic due diligence playbooks do not perform well in space. The standard commercial CDD template, built around TAM/SAM/SOM construction, historical revenue CAGR and competitor win-rate, misses or misreads most of what makes space companies different. The standard technical TDD template, built around IP strength and product-market fit, misses what makes space hardware credible to the customers who actually buy it.

Buyers running aerospace due diligence for the first time often discover this two weeks in, when the numbers in the information memorandum do not reconcile with any bottom-up view of the programs the target is meant to be serving. By then the deal clock is against them. This article sets out how experienced diligence teams structure commercial and technical work on space companies, what they actually test, and where the deals reliably stop.

The Must-Believe Frame for Space Due Diligence

The organizing principle underneath credible space diligence is the must-believe frame. Rather than producing a chart pack, diligence teams articulate what has to be true for the investment thesis to hold, specific, testable, binary beliefs, and then assemble the evidence for or against each one.

For a SAR constellation: the military/civil addressable demand grows at X% CAGR through 2030; at least three defense customers will sign multi-year contracts of Y size by 2027; the company’s flight heritage and sensor performance support pricing at a Z premium to Capella and ICEYE; the company can scale manufacturing cadence from one to four satellites per quarter within eighteen months without quality loss.

Each belief gets tested against evidence, and each receives a confidence rating. Beliefs that pass strongly become the case; beliefs that fail define the downside; beliefs where the evidence is genuinely ambiguous define the diligence conditions and the risks to price in. This format is what separates decision-ready output from a chart-pack with a recommendation welded on.

Commercial Due Diligence on a Space Company: Six Things to Test

1. Bottom-up demand construction. The first and often the longest workstream. Space demand is program-linked: it follows constellation deployments, national procurement cycles, anchor-tenant contracts and multi-year tranches. Annual growth-rate extrapolations built on historical series miss step-changes that a single program slip can cause. Credible CDD builds demand from the mission list up, each constellation, each program, each platform type, with explicit execution-probability factors, distinction between announced and contracted demand, and exclusion or segmentation of adversary-nation activity where the target’s addressable market requires it.
2. Program-linked revenue concentration. Most space companies have fewer than ten revenue-critical customer programs. Understanding which, how durable each program is, what happens if one tranche slips, and what the pipeline replacement looks like tells you more about the business than the ARR line. Concentration metrics in space should be calculated on programs and platforms, not on customers alone.
3. Spaceflight heritage. A supplier with three successful missions at a named prime occupies a commercial position that a pre-revenue competitor cannot close quickly. Heritage should be pressure-tested at mission level, which flights, which platforms, which outcomes, which customer references, because it drives pricing, win rate and replacement cycles in ways the income statement does not show.
4. Competitive positioning. The competitive landscape in space is rarely a five-logo grid. In SAR, electric propulsion, EO analytics, SDA or quantum payloads, the relevant competitive picture is who is winning which specific programs and why, which competitor’s technology substitutes for the target’s on which mission profiles, and where buyers are consolidating onto single suppliers. This is where most generic CDD goes shallow and where experienced sector teams spend the most time.
5. Dual-use customer exposure. Defense and intelligence agencies are the anchor customers for most listed commercial EO, SAR and RF operators, and an increasing share of other space subsectors. The commercial/defense customer mix, the pace at which it is shifting, and the contract durability (program of record vs. experimental) of the defense portion are central to the revenue picture. Targets that have understated their defense exposure to keep an “all-commercial” narrative rarely survive diligence intact.
6. Regulatory overlay. ITAR, EAR and allied-country export regimes determine which customers the target can serve and which partnerships are viable. This requires reading product specifications against ECCN classifications, not reading policy summaries. The 2024 EAR Interim Final Rule and 2025 ITAR revisions materially shifted this map for allied-country exports; diligence that predates or ignores those changes is working from an incomplete picture.

Technical Due Diligence on a Space Company: Five Things to Test

1. Performance against mission requirements. Strong TDD starts with the mission, not the product. What does the product actually have to do, on which platforms, for which customers, at what SWaP-C budget? Laboratory performance figures are necessary but not sufficient; the question is whether the performance holds in the mission profile the target claims to serve. Thermal, radiation, vibration, duty-cycle, plume effects on host bus, all are judged against the use case, not against datasheet conditions.
2. Qualification and flight-heritage path. Qualification state is one of the strongest single indicators of commercial readiness in space hardware. Which TRL is the product at, against what standard? What is the remaining qualification path to reach flight readiness with a named customer? How many missions of flight heritage will the target have accumulated at the point the thesis requires? A credible flight-heritage path is often the single biggest de-risking lever a target can present; its absence is often the single biggest risk.
3. SWaP-C trade-offs. Size, Weight, Power and Cost are the currency of hardware decisions in space. A TDD that does not engage with SWaP-C explicitly at the mission-profile level is working in the abstract. The question is whether the target’s product fits the SWaP-C envelope of the platforms it claims to serve, and what the trade-off looks like against substitutes.
4. Integration risk with bus and payload. Most space hardware is sold into a system integration environment where the integrator, a prime, a system house, a constellation operator, has a strong say in whether a component flies. Integration risk covers interface maturity, qualification on target buses, system-level test evidence, and the target’s integrator relationships. Components that perform well in isolation and poorly under integration lose deals.
5. Supply-chain criticality. Space supply chains are thin. Single-source components, export-controlled inputs, specialist materials, foreign-dependency exposures and capacity constraints at the target’s own suppliers all need explicit treatment. A target whose thesis depends on 10x volume scaling has a supply-chain risk profile that a qualitative TDD will miss.

Where Commercial and Technical Due Diligence Intersect

Experienced diligence leads run commercial and technical due diligence on space companies as linked workstreams rather than parallel ones. Three intersection points matter most.

The first is substitution analysis. Whether a FEEP thruster is best-fit for a specific mission, or whether a chemical or Hall-effect competitor better serves that mission profile, is simultaneously a technical and a commercial question. Answering it well requires mission-profile substitution modeling, with quantified time/energy trade-offs at the mission level, fed back into the demand model and the competitive view.

The second is flight-heritage-linked demand. Customers do not buy capability in the abstract; they buy capability with a specific flight-heritage position. Forecasting demand for the target has to reflect not just the mission count but whether the target is on the short list of qualified suppliers for each mission.

The third is qualification as addressable-market gate. A target’s SAM is not what the product could in principle serve; it is what the product could serve given its current qualification state. TDD feeds the CDD addressable-market construction directly.

Space Due Diligence Red Flags That Should Stop a Deal

A handful of diligence findings regularly lead experienced teams to recommend against proceeding or to require significant repricing.

Demand forecasts that cannot be reconstructed from the mission list. Program-linked revenue where more than half sits on a single customer or program with limited replacement pipeline. Flight heritage that exists at component level but not at the mission or customer the thesis depends on. Technical performance that degrades materially outside laboratory conditions. Export-control exposure that materially limits the customer set assumed in the plan. Supply-chain dependence on a single source that cannot be dual-sourced inside the investment horizon.

None of these is a failure of the target. Some are properly managed and priced. But each is a specific, testable claim the target must answer. Diligence that does not ask the questions will find these problems after close.

Resonance has run commercial and technical due diligence for US and European primes, venture and private equity investors, and corporate buyers across propulsion, launch, SAR, EO, quantum payloads and advanced materials. Work draws on Space Insider platform data covering 6,000+ space companies, 4,500+ investors, 4,800+ funding rounds and mission statistics through 2042, combined with a deep-tech SME network spanning engineering, operator and former-prime backgrounds. Contact us to discuss a specific diligence mandate.

Frequently Asked Questions

What is space due diligence?

Space due diligence is the structured commercial and technical assessment of a space company, asset or investment. Unlike generic CDD/TDD, it accounts for sector-specific factors including program-linked demand, spaceflight heritage, ITAR/EAR export controls, mission-level performance and the supply-chain economics of low-volume, high-reliability hardware.

How is space CDD different from standard commercial due diligence?

Standard CDD relies on TAM/SAM/SOM construction, historical revenue CAGR and competitor win-rate. Space CDD builds demand bottom-up from the mission list, applies execution-probability factors, calculates revenue concentration on programs rather than customers, pressure-tests spaceflight heritage at mission level, and reads addressable market through the lens of ITAR, EAR and allied-country export regimes.

What does technical due diligence on a space company actually test?

Space TDD tests five things: whether the product performs against real mission requirements (not just laboratory conditions), the qualification and flight-heritage path to commercial readiness, SWaP-C trade-offs against the target platforms, integration risk with the bus and payload, and supply-chain criticality including single-source and export-controlled inputs.

What is the “must-believe” frame in space due diligence?

The must-believe frame is the standard format for decision-ready diligence outputs. Instead of producing a chart pack, the diligence team articulates the specific, testable beliefs that have to be true for the investment thesis to hold, assembles evidence for and against each one, and assigns a confidence rating. Beliefs that fail define the downside; ambiguous beliefs define the diligence conditions and pricing risks.

Why do ITAR and EAR matter in aerospace due diligence?

ITAR, EAR and allied-country export regimes directly determine which customers a target can serve and which partnerships are viable. Reading product specifications against ECCN classifications – rather than relying on policy summaries – is essential. The 2024 EAR Interim Final Rule and 2025 ITAR revisions materially shifted the map for allied-country exports, and any diligence predating or ignoring those changes is working from an incomplete picture.

What red flags should stop a space investment deal?

Six findings consistently lead experienced diligence teams to recommend against proceeding or to require significant repricing: demand forecasts that cannot be reconstructed from the mission list, revenue concentrated on a single program with no replacement pipeline, flight heritage that does not match the thesis-critical mission or customer, performance that degrades outside lab conditions, export-control exposure that limits the assumed customer set, and single-source supply-chain dependence that cannot be dual-sourced inside the investment horizon.