Surtr raises $4.8M seed for counter-drone software already tested in Kyiv

Ukraine's Brave1 pulled the months-old YC startup to Kyiv before it even held an export license, a measure of how much front-line demand now rides on the counter-drone integration layer.

Surtr, a counter-drone software startup in Y Combinator's Spring 2026 batch, has raised a $4.8 million seed round led by Allegis Capital, the company said Monday in an exclusive release to Tectonic Defense. Eniac Ventures, Gaingels, Robinhood Ventures, Streamlined Ventures and a group of angels joined, per the outlet.

The product, ParallaxOS, pulls feeds from radars, RF detectors, cameras and acoustic arrays into one screen with AI threat classification. The company's YC profile calls it one interface, any hardware, human in the loop. It ships as an edge-compute box, open and modular enough to plug into a customer's command system of choice. "Operators right now are stuck staring at a wall of screens," founder Anshul Ahluwalia told Tectonic. He and co-founder Cameron Fiore wrote autonomy software at Shield AI and Anduril before starting Surtr in March.

Ukraine found them almost immediately. Brave1, the government's defense-tech cluster, reached out once the startup became "searchable on the internet," Ahluwalia said, and invited the pair to Kyiv at the end of May. In trials with the military, the system detected and tracked FPV drones that operators flew at it, fusing microphone arrays and cameras at latency under 100 milliseconds, according to Tectonic. Brave1 published the results on June 23 and assessed a good level of technological maturity for a prototype, with feedback from Ukrainian military personnel to adapt the system for combat use, Ukrainska Pravda noted. Integration with strike systems protecting vehicles and stationary assets comes next, the cluster wrote.

The new money goes to engineers, Pentagon program submissions and an ITAR license, the clearance Surtr needs before its software can cue kinetic responses in Ukraine. The company also holds an approval to test at the Point Defense Battle Lab in North Dakota and is working with all of the US services on contracting and demonstrations, Ahluwalia added.

Integration is already a business. Tectonic pointed to Picogrid, which has made "a small fortune" getting counter-drone hardware to talk to itself; Surtr's bet is the layer above that plumbing, a single pane of glass with an autonomy engine that can eventually cue a turret on its own. Two employees now hold a $4.8 million runway and an approved battle-lab slot. The ITAR license decides when the system Ukrainian operators tested in May can move from finding drones to defeating them.