SE3 Raises $30M Series A to Scale Spatial AI for Defense Drones

SE3 has raised $30 million in Series A funding led by Accel to scale spatial intelligence software for drones and other autonomous systems. Keen, Lakestar and Seedcamp joined the round, the Munich-founded company announced on November 12, 2026.

The company builds software that turns sensor data into spatial understanding. It combines computer vision and AI so machines can operate autonomously in complex environments, including situations where satellite navigation is disrupted. That constraint defines the product: the software must keep working when GPS does not.

Why does defence come first?

European defence is SE3's initial market, and the company grounds that choice in the war in Ukraine. SE3 says large drone fleets in Ukraine are stretching the limits of human supervision while electronic warfare disrupts satellite navigation. Both pressures increase the need for autonomy that places less demand on operators. The technology is already deployed in Ukraine.

The deployment record is concrete. SE3 reports:

• thousands of systems shipped over the past two years
• multiple contracts with Ukraine and with Germany's armed forces, the Bundeswehr
• AI partnerships with defence primes Rheinmetall and HENSOLDT
• partnerships with scale-ups Auterion and ERC System

That customer list spans both large incumbents and younger platform builders. It also previews the company's commercial pitch: one software layer across many hardware makers.

What does the software actually do?

The platform-agnostic software connects drones and ground vehicles from different manufacturers. It fuses their sensor data into a shared 3D picture of the environment. SE3 says the software then uses that picture to coordinate the swarm, optimizing each system's behavior, routes and positions based on its understanding of the terrain.

Two design choices stand out. Operators can command all functions by voice. And the software runs entirely on edge devices, the local computers mounted on the platforms, so systems stay operational in contested environments where connectivity to a remote server cannot be assumed.

How does the neutral-layer strategy work?

SE3's positioning fits a procurement shift in European defence. The Modular Open Systems Approach and Germany's MOSABw programme make it easier for armed forces to combine systems from different suppliers. Modularity and interoperability are becoming procurement requirements, not preferences.

For SE3, that shift creates a specific role. The company acts as a neutral software provider across manufacturers' platforms. Crucially, it does not produce unmanned vehicles that would compete with its partners. Rheinmetall, HENSOLDT, Auterion and ERC System can adopt SE3's layer without handing a rival a foothold in their own hardware sales.

That neutrality is the mechanism behind the round's commercial logic. If armed forces keep buying mixed fleets under open-systems rules, the software that binds those fleets together gains value on every platform added.

Who built the company?

SE3 was founded by CEO Lukas Köstler, CTO Simon Klenk and Chief Science Officer Daniel Cremers. The company spun out of Cremers' computer vision laboratory at the Technical University of Munich. Köstler and Klenk were working there on doctorates in computer vision and robotics. Cremers holds the university's chair for computer vision and AI.

The funding announcement said the founders' research background made the team well qualified to build spatial AI for autonomous systems. It described the investment as backing sovereign spatial intelligence for Europe.

Where does the money go?

The proceeds will fund growth across engineering, commercial and operations teams as SE3 prepares to fulfil additional contracts. The geographic plan is specific:

• strengthen presence in Germany and Ukraine
• open a UK office
• expand further across Europe

Defence remains the immediate focus. From 2027, the company plans to explore robotics, emergency response and other civilian applications for demanding environments.

What is the so-what?

The round ties SE3's near-term expansion to defence contracts while preserving a route into civilian autonomy from 2027 onward. The key commercial question is whether its existing partnerships and shared software architecture can be converted into wider deployments across manufacturers, without SE3 having to build a competing vehicle fleet.

By Daniel Okafor