Epirus, the Company That Zaps Drone Swarms Wholesale

Epirus sells the only economics that beat a drone swarm’s: one electromagnetic pulse, an entire formation down. Its Leonidas high-power microwave arrays hold the US Army’s IFPC-HPM contracts and a $250 million war chest, and the company’s software-defined emitters promise the magazine that never runs dry, if the range problem cooperates.

Epirus at a glance

How Leonidas kills by the dozen

Leonidas floods a sector of sky with tailored microwave energy that couples into drone electronics and drops whatever flies through it, tens of targets in a sweep, friendly aircraft notched out by waveform design, per company and Army test reporting. Because the ‘ammunition’ is electricity through GaN solid-state arrays, cost-per-engagement approaches the power bill, the inverse of every interceptor economics problem chronicled in our air defense rankings.

From prototype to IFPC-HPM GEN II

The Army’s Rapid Capabilities office bought Leonidas as the HPM leg of Indirect Fire Protection Capability, prototypes delivered and exercised from 2023, then doubled down with the GEN II award targeting twice the effective range and 30 percent more power. Deployments have reached operational experiments abroad, and the Navy and border agencies have trialed variants, expeditionary pallets, vehicle mounts, even counter-boat configurations, while the Series D funds a production line sized for program-of-record hopes.

Where microwaves fit the layer cake

Doctrine slots HPM below missiles and beside guns and lasers: lasers snipe one target precisely, microwaves mow the close-in mass that saturates everything else, kinetics handle what hardening survives. Ukraine’s drone-per-minute reality and Red Sea expenditure rates made that stack urgent, which is why IFPC-HPM outlived the usual prototype purgatory and why every allied SHORAD roadmap now carries an HPM line.

The honest physics

Range remains the constraint the company cannot waveform away, microwave power density falls with distance squared, keeping effective envelopes in the hundreds-of-meters to low-kilometers class the GEN II contract exists to stretch. Hardened or fiber-guided threats resist coupling; terrain masks; and integration with cueing radars decides real-world performance more than peak watts. Epirus’s counterargument is the only one that matters to the Army: against the ten-drone-for-one-interceptor exchange, nothing else on contract scales.

Software-Defined Power

What separates Leonidas from Cold War microwave experiments is the shift from vacuum tubes to solid-state gallium nitride amplifiers governed entirely by software. Waveform, pulse pattern and beam shape are parameters, not hardware. That means the system can be updated against new drone electronics the way a phone receives a security patch, and it can sculpt its energy to protect friendly aircraft operating nearby while still saturating a hostile swarm.

The architecture also scales in both directions. The same amplifier building blocks that fill a trailer-sized Leonidas can be packaged into smaller expeditionary units or podded variants, which Epirus has demonstrated on ground vehicles. For an Army wrestling with how to defend dispersed formations, a counter-swarm weapon that ships as stackable power electronics rather than bespoke tubes is an attractive logistics proposition.

Beyond Drones, Toward Boats and Motors

High-power microwave is usually framed as a counter-drone tool, but the underlying effect, disrupting electronics and electric motors, applies to anything that depends on them. Epirus and the US Navy have tested Leonidas energy against small-boat outboard motors, a direct response to the swarming fast-attack craft problem in chokepoints like the Strait of Hormuz. A weapon that can stall a dozen boat engines at once changes that tactical arithmetic without firing a shot.

The same logic extends to loitering munitions, improvised ground robots and, eventually, anything autonomous that an adversary sends forward cheaply. That breadth is the real bet behind the company’s $250 million Series D. Investors are not buying a drone jammer, they are buying an electromagnetic area-denial layer that could sit under many different missions.

Frequently asked questions

What is Leonidas?

Epirus’s high-power microwave weapon that disables drones, including whole swarms, by overloading their electronics.

What contracts does Epirus hold?

The Army’s IFPC-HPM prototype award ($66.1M) and the GEN II follow-on ($43.55M), plus service experiments beyond the Army.

How is Leonidas different from a laser?

A laser burns one target at a time at range; Leonidas blankets a sector to defeat many targets at once, closer in.

What is the system’s main limitation?

Physics: microwave effectiveness drops steeply with distance, so envelopes are short and cueing integration is critical.

How is Epirus funded?

Venture capital including a $250 million Series D dedicated to scaling Leonidas production.