What is the real market size of defense tech?

Why does defense tech suddenly look like such a huge market?

Defense tech looks much bigger today because military spending, equipment budgets and private investment are all rising at the same time.

SIPRI’s latest global data puts military spending at $2.887 trillion in 2025, the 11th consecutive year of growth and 41% higher in real terms than a decade earlier. Europe increased spending by 14% in one year, while Asia and Oceania increased it by 8.1%. Military spending up 41% in a decade shows the pace; we look at how fast defense tech grows, and why, in our defense tech report.

The more interesting shift is inside those budgets. EU countries spent €115 billion on defense equipment in 2025, up from €88 billion a year earlier. Defense R&D reached another €17 billion. In the U.S., the Congressional Budget Office calculates $384 billion of acquisition funding in the FY2026 defense plan, covering procurement and R&D.

Private money is moving even faster. Financial Times reporting based on PitchBook data found that narrowly defined defense-tech startups had already raised $12.3 billion in venture capital during 2026, exceeding the $9.95 billion invested during all of 2025.

Defense tech is growing for three reasons at once: governments have larger budgets, more of those budgets are moving toward equipment and technology, and investors are financing companies capable of chasing that demand.

Is the $2.9 trillion military budget really the defense tech market?

The $2.887 trillion figure is much too broad to call the defense tech market.

SIPRI’s military-spending number includes military personnel, pensions, bases, fuel, operations, maintenance, administration and many other expenses that never become revenue for an outside technology supplier.

The difference becomes obvious when we compare spending with actual company sales. Global military expenditure was $2.718 trillion in 2024. SIPRI’s 100 largest arms and military-services companies generated $679 billion of arms revenue that year.

Those 100 companies therefore produced revenue equivalent to roughly 25% of global military spending.

The comparison has limits because smaller suppliers sit outside SIPRI’s Top 100 and purchases can take years to become recognized revenue. Still, it gives us the right order of magnitude. The global defense budget is approaching $3 trillion. The commercial market available to defense companies sits much lower.

What should we actually count as defense tech?

For market sizing, defense tech is best measured through supplier revenue and government spending on equipment, software, R&D and military services.

That definition includes missiles, aircraft and radar alongside drones, autonomy software, satellites, AI, cyber systems, sensors, communications and advanced manufacturing.

The boundary between old defense and modern defense tech has become increasingly blurry. An autonomous aircraft combines software, sensors, communications, propulsion and manufacturing. A modern missile contains processors, guidance software and networking technology. SpaceX can simultaneously be a commercial space company and a military supplier.

Trying to isolate a pure “AI and drones” market therefore creates arbitrary boundaries and plenty of double counting.

We get a cleaner picture by starting with actual military supplier revenue, then looking at acquisition budgets to understand how much demand is coming next.

How much money actually reaches defense companies?

At least $679 billion a year already reaches the world’s largest defense suppliers, and the full supplier market is clearly bigger.

SIPRI found that its Top 100 arms producers and military-services companies generated a record $679 billion in arms revenue in 2024, up 5.9% in one year and 26% over a decade.

That dataset stops at company number 100.

Thousands of smaller manufacturers, software vendors, component suppliers, maintenance businesses and private contractors sit below that line. Disclosure is also weak in parts of the Chinese and Russian defense industries, which makes the global total harder to reconstruct precisely.

The $679 billion figure is unusually useful because it gives us a hard floor. Even before estimating anything about the long tail, global defense suppliers already generate close to $700 billion annually.

Current procurement suggests that floor will keep moving upward. Military spending rose again after the revenue year covered by SIPRI, while U.S. and European acquisition budgets are still climbing.

How big is the U.S. defense tech buying pool?

The U.S. defense acquisition pool reaches $384 billion in the FY2026 plan, giving technology suppliers an enormous market even before foreign sales are counted.

The Congressional Budget Office divides that amount between procurement and research, development, test and evaluation.

The plan contains roughly $205 billion for procurement and $179 billion for R&D once base-budget and reconciliation funding are combined. A U.S. plan split into procurement and R&D shows how markets get sliced; we cover which segments and regions lead in our defense tech report.

That $384 billion is far more useful for defense-tech market sizing than the Pentagon’s full budget. It pays for developing, buying and upgrading actual military systems.

A company capturing just 1% of that annual acquisition pool would generate nearly $4 billion of business.

And the U.S. spends unusually heavily before products even reach full production. Almost $180 billion of planned R&D funding creates room for experimental aircraft, autonomy, software, space systems, sensors, AI and weapons programs years before large procurement contracts arrive.

That helps explain why the U.S. can support several new defense companies at billion-dollar revenue scale without requiring them to displace Lockheed Martin or RTX across their entire businesses.

How big is Europe’s defense tech market now?

Europe is already a €130 billion-plus annual equipment-and-R&D market, and the buying pool is still growing fast.

The European Defence Agency says EU defense spending jumped from €343 billion in 2024 to €418 billion in 2025.

Equipment procurement climbed even faster, from €88 billion to €115 billion. Defense R&D moved from €13 billion to €17 billion. Together, those two categories reached €132 billion.

The EDA expects total EU defense spending to reach €454 billion in 2026. Defense investment is projected to account for 36% of that amount, which works out to roughly €163 billion.

That means annual EU defense investment could be around €60 billion higher than it was only two years earlier.

Europe’s industrial companies are already feeling the effect. SIPRI found that arms revenue among European Top 100 companies excluding Russia grew 13% in 2024. German companies grew 36%, with Rheinmetall up 47%.

More recent procurement data suggests the demand wave still has room to run. The EDA currently projects EU defense spending could reach €547 billion by 2029 if present trends continue.

Can a defense company really sell into the whole global military market?

No defense company can realistically treat the entire global military budget as its market because defense procurement is extremely concentrated and politically restricted.

SIPRI calculates that the 15 largest military spenders accounted for 80% of world military expenditure in 2025. The United States, China and Russia alone represented 51%.

Access to those budgets varies enormously.

China spent an estimated $336 billion, yet its arms imports fell 72% between 2016–20 and 2021–25 as domestic manufacturers replaced foreign weapons. Russia also relies heavily on its domestic industrial base and is largely inaccessible to Western suppliers.

Europe shows the opposite pattern. European arms imports increased 210% between 2016–20 and 2021–25. The United States supplied 48% of those imports and 58% of imports by European NATO members, according to SIPRI’s latest arms-transfer data.

A startup with access to the U.S., European and selected allied markets can still build a huge company. Adding Chinese and Russian military budgets to its TAM simply because those governments spend money creates a number the company could never actually reach.

Market	2025 military spending	What outside suppliers face
United States	$954B	Huge market, but heavily regulated
China	$336B	Strong domestic production, limited foreign access
Russia	$190B	Heavily domestic and restricted
Germany	$114B	Rapidly growing European procurement
India	$92.1B	Mix of domestic production and imports
United Kingdom	$89.0B	Large NATO procurement market
Saudi Arabia	$83.2B	Major international arms buyer
France	$68.0B	Large domestic industry plus imports
Japan	$62.2B	Fast-growing allied defense market

Are defense tech startups actually becoming big businesses?

Yes. Defense tech startups are now reaching revenue levels that would have looked exceptional for venture-backed defense companies a few years ago.

Anduril is the clearest case. Financial Times reporting puts its revenue at $2.2 billion in 2025, with the company projecting about $4.3 billion for 2026. The U.S. Army also awarded Anduril a contract vehicle with a ceiling of up to $20 billion, although that ceiling should never be confused with guaranteed revenue.

Shield AI is smaller but moving quickly. The company generated about $300 million in 2025 and told Fortune that it expects more than $540 million in 2026, which would mean growth above 80%. Shield AI growing from about $300 million to over $540 million is quick; we cover the top companies today in our defense tech report.

SpaceX gives us another useful benchmark. SIPRI estimated its military revenue at $1.8 billion in 2024, enough to enter the global Top 100 arms companies.

Software is scaling too. Palantir reported $2.4 billion of government revenue in 2025, up 53%, including $1.9 billion from U.S. government customers. That figure includes civilian agencies, so we should avoid treating all of it as defense revenue, but it shows how large government-focused software businesses can become.

The startups remain small beside Lockheed Martin’s $64.7 billion of arms revenue or RTX’s $43.6 billion. But a new generation of defense companies has clearly crossed from promising contractor into billion-dollar business.

Does record defense tech funding prove the market is huge?

Record defense tech funding shows how strongly investors believe in the sector, but funding itself is a terrible way to measure market size.

The biggest clue is how much the number changes when the definition changes.

PitchBook data reported by Defense News put defense-tech venture deal value at $49.1 billion in 2025, up from $27.2 billion a year earlier. That dataset includes a broad range of dual-use companies.

A narrower PitchBook definition reported by the Financial Times produced only $9.95 billion for the same year.

That is almost a fivefold difference for supposedly the same market.

The latest funding wave has accelerated again. The Financial Times reported earlier this year that narrowly defined defense-tech companies had already raised $12.3 billion in 2026, passing the previous full-year total.

That tells us investors are pouring money into drones, autonomy, maritime systems, AI and other military technologies. It says very little about how much governments currently buy from those startups.

A $1 billion funding round finances engineers, factories and future production. It does not create $1 billion of customer demand.

Is defense tech basically just drones and AI now?

Drones and AI are the most visible part of defense tech today, but the money is still spread across missiles, air defense, aircraft, ships, space, electronics and ammunition.

Recent company growth makes this clear.

German defense-company arms revenue rose 36% in SIPRI’s latest Top 100 data, driven heavily by ammunition, armored vehicles and air defense. Rheinmetall grew 47%.

Japanese companies in the ranking increased combined arms revenue by 40%. South Korean companies grew 31%. Those increases cover a much wider industrial base than autonomous drones.

Meanwhile, NATO’s latest capability priorities include air and missile defense, long-range weapons, logistics and large land formations alongside emerging technologies. NATO has said its members need to increase the number of air and missile defense systems fivefold.

AI and autonomy still matter enormously because they are moving into almost every layer of military hardware. Their economic importance may eventually be larger than a standalone “AI defense market” suggests because software is increasingly embedded inside aircraft, missiles, sensors, ships and command systems.

The current defense boom is broader than the startup headlines make it look.

Are bigger defense budgets already turning into company revenue?

Yes. Defense-company revenue is already rising, with a lag because factories and long-cycle weapons programs take time to scale.

Global military expenditure jumped 9.7% in real terms in 2024. SIPRI’s Top 100 company revenue increased 5.9% during the same year.

That gap is what we would expect during a rapid rearmament cycle. A government can approve money much faster than a company can build a missile factory, expand a shipyard or deliver an aircraft. Budgets approved faster than factories can be built is a real bottleneck; we dig into the biggest unsolved problems in our defense tech market report.

Still, 77 of SIPRI’s Top 100 companies increased arms revenue in 2024, and 42 posted double-digit growth. At least 38 were expanding production capacity.

Those capacity constraints remain visible today. NATO has since launched its NATO Engine initiative to connect available factory capacity across allied countries, with particular attention to air defense and strike systems.

Orders are running ahead of some suppliers’ ability to deliver. Current revenue is therefore a conservative picture of demand already sitting in budgets, contracts and backlogs.

Do the old defense giants still control the market?

Yes. The ten largest arms companies still generate about 48% of all revenue inside SIPRI’s Top 100.

We calculate roughly $326.6 billion of combined 2024 arms revenue for those ten companies, against $679 billion across the full Top 100.

American companies dominate even more clearly. The 39 U.S. companies in SIPRI’s ranking generated $334 billion, almost half of the global Top 100 total.

That concentration creates a high bar for startups. Large primes already own factories, security infrastructure, program relationships and decades of experience navigating government procurement.

At the same time, a $2 billion Anduril or a rapidly growing Shield AI barely needs to dent the largest contractors’ businesses to become very large itself. A market this concentrated can still produce major new entrants around specific programs and technologies.

Company	2024 arms revenue
Lockheed Martin	$64.65B
RTX	$43.60B
Northrop Grumman	$37.85B
BAE Systems	$33.79B
General Dynamics	$33.63B
Boeing	$30.55B
Rostec	$27.12B
AVIC	$20.32B
CETC	$18.92B
L3Harris Technologies	$16.21B

Will NATO’s 5% target make defense tech twice as big?

NATO’s 5% commitment can push defense demand much higher, but a straight doubling of the defense tech market would be too aggressive.

Allies have committed to spending 5% of GDP annually on defense and defense-related security by 2035.

The detail matters. At least 3.5% is meant for core defense requirements. Up to another 1.5% can cover areas such as critical infrastructure, network protection, civil preparedness, resilience, innovation and defense-industrial capacity.

Some of that extra spending will flow to weapons and military technology, while some will go into infrastructure and broader security projects.

The increase is also gradual. NATO says European Allies and Canada already raised combined defense expenditure by nearly 20% in real terms during 2025, but the 5% target runs to 2035.

Europe gives us a useful near-term benchmark. The European Defence Agency sees EU military spending rising from €418 billion in 2025 toward €547 billion by 2029 if current trends continue.

That would be roughly 31% growth in four years.

The NATO commitment materially increases the ceiling for defense companies, especially in Europe. Doubling the current supplier market would require much more than simply multiplying today’s defense budgets by the new GDP target.

So what is the real market size of defense tech today?

We estimate the global commercial defense tech and defense-supplier market at roughly $800 billion a year today, with about $750 billion to $900 billion as the most defensible range.

The strongest starting point is actual company revenue.

As seen above, SIPRI’s largest 100 arms and military-services companies already generated $679 billion in 2024. Any credible global estimate has to sit above that figure because thousands of smaller suppliers fall outside the ranking and parts of the global defense industry remain poorly disclosed.

A modest 10% addition to that observed Top 100 revenue would already put the market around $747 billion. Adding 30% takes it to about $883 billion. We cannot prove the exact size of that long tail from public data, so pretending that $812 billion or $836 billion is an audited market figure would create false precision.

The demand side supports roughly the same order of magnitude. The U.S. alone has $384 billion of acquisition funding in its FY2026 plan. EU countries spent €115 billion on equipment and €17 billion on defense R&D in 2025, with total defense investment heading toward roughly €163 billion in 2026. Large procurement markets in China, Russia, India, Japan, South Korea, Saudi Arabia and elsewhere sit on top of those Western numbers.

Around $800 billion gives us the cleanest answer to the original question.

The almost $2.9 trillion global military-spending figure is the broader envelope from which defense demand comes. The commercial market that defense manufacturers, software companies and technology suppliers can actually fight over is closer to $800 billion today.

Within that market, the narrower Silicon Valley-style category of drones, autonomy, AI, software and new defense startups is much smaller and still impossible to measure cleanly without arbitrary definitions.

For the real defense tech market today, we would use roughly $800 billion, keep $750 billion to $900 billion as the honest range, and treat any much more precise number with suspicion.