Surtr Defense Systems

Why it fits

Founder's pitch: militaries have stockpiled counter-drone sensors and effectors with no good way to integrate them, and Surtr wants to be the hardware-agnostic fusion layer. Tested in Ukraine through Brave1. Its FCC authority lists Fort Knox among radar test sites.

Stage and round

Formation stage. Tectonic reported on 7 July 2026 that Surtr, founded March 2026, raised a $4.8M pre-seed led by Allegis Capital, Eniac Ventures, Gaingels, Robinhood Ventures and Streamlined Ventures, giving no valuation or instrument. No Form D was found. Robinhood Ventures Fund II's N-2 and 10-Q list a $250,000 SAFE acquired 8 June 2026. The FCC granted an experimental special temporary authority for one radar on 3 September 2026.

Ask on the first call

1. 01Which radars, RF sensors and effectors are integrated today, beyond the mic arrays and cameras Tectonic reported in July 2026, and how long does each new integration take?
2. 02What contract vehicle, if any, sits behind the Fort Knox and Point Defense Battle Lab testing, and is any of it paid? The FCC narrative names none.
3. 03The only instrument on record is a $250,000 SAFE. Is the whole $4.8M pre-seed on SAFEs, at what cap, and how much has closed?
4. 04Tectonic says Surtr is working on an ITAR licence to cue kinetic responses in Ukraine. Where does that stand, and what can Surtr do before it is granted?

Risks

• –No source opened shows revenue or a contract. The FCC filings name no government contract, and Brave1 described the Ukraine work as a prototype test.
• –Early technical maturity. Tectonic reported in July 2026 that the software had so far been tested on mic arrays and cameras, with radars, passive sensors and turrets still to come.
• –Tectonic names Picogrid as already connecting these systems. The launch post says Surtr integrates with any hardware that has an API, so coverage depends on hardware makers exposing one.

Could not confirm

• ?The $4.8M total comes from the company's release to Tectonic. No filing confirms the total, valuation or terms beyond Robinhood Ventures Fund II's $250,000 SAFE.
• ?Dealroom's body text says US$3.11M seed, citing Tectonic, while Tectonic says $4.8M pre-seed. The $3.11M figure is unexplained.
• ?Founder statements in Tectonic, not confirmed by any government or third-party page: Point Defense Battle Lab testing approval, and latency under 100 milliseconds in the Kyiv tests.