EnduroSat raises $205M to mass-produce satellites from Sofia
Sofia's EnduroSat has raised $205M from Riot Ventures, Atreides Management, Founders Fund and more to mass-produce satellites on both sides of the Atlantic and push space data towards $1 per gigabyte.
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Founded 2015 · Sofia, Bulgaria
Bulgaria’s EnduroSat has raised $205M in a round co-led by Riot Ventures and Atreides Management, joined by Founders Fund, Google Ventures, Lux Capital and the European Innovation Council, to mass-produce its satellites in both Europe and the United States.
We keep being told Europe cannot fund deeptech at scale – and yet September alone has pushed European space funding past the billion-euro mark, with the latest proof landing in Sofia. Below, I lay out the round, the company behind it, and what a cheque this size for a Bulgarian manufacturer says about where the satellite industry is heading.
Two leads, nine backers and a former airbase
EnduroSat announced the $205M round on 16 September. Riot Ventures and Atreides Management co-led, with Founders Fund, Google Ventures, Lux Capital, Omnes Capital, Giant Ventures, House Capital, Emphatic Capital, Endeavor Catalyst and the European Innovation Council participating (company announcement, 16 September 2026). The company attached no stage label to the round, which comes less than a year after the €95.7M Series B it announced in October 2025.
The money has two destinations. In the United States, a new high-volume manufacturing facility. In Bulgaria, a major expansion of the company’s industrial footprint – what EnduroSat describes as the EU’s largest space and defence hub, built around a former military airbase near Sofia (European Spaceflight, 16 September 2026).
From a Sofia lab to 200 delivered spacecraft
Founded in 2015 by Raycho Raychev, EnduroSat builds standardised, software-defined microsatellites that customers configure for Earth observation, connectivity and defence missions instead of commissioning bespoke hardware. The company says it has launched 103 satellites to orbit and delivered more than 200 for missions worldwide (company announcement, 16 September 2026).
The stated ambition is blunt: cut the cost of space data from hundreds of dollars per gigabyte to roughly $1 (company announcement, 16 September 2026). Part of the new capital funds larger, ESPA-class spacecraft in its FRAME product line, moving EnduroSat up the mass range just as defence and constellation customers ask for bigger platforms.
A $9.35bn market compounding at 28%
The segment EnduroSat sells into is one of the rare ones we can size with confidence. The global small satellite market stands at $9.35bn in 2025 and is projected to reach $32.13bn by 2030, a 28.0% CAGR (MarketsandMarkets, January 2026). A manufacturer that industrialises production now is betting that the constellation wave keeps compounding – and this month suggests investors agree.
Look at what we have covered in the past ten days alone: The Exploration Company raised $450M for its Nyx capsule, and Open Cosmos raised €300M to build one satellite a day. With EnduroSat’s round, European space companies have announced more than €1bn in new funding since 1 September (European Spaceflight, 16 September 2026). Every one of those rounds sits in our fundraising data.
What American capital sees in Bulgarian factories
So what does the investor list tell us? Riot Ventures, Atreides Management, Founders Fund, Google Ventures and Lux Capital are American cheques landing in a Sofia-headquartered company, while the European Innovation Council sits in the same syndicate. The old pattern was European deeptech moving to the US to raise. The new one is US capital funding European manufacturing where it already stands, with Brussels co-investing alongside rather than watching from the doorway.
The good news is that the constraint which used to cap companies like this – thin European growth capital for hardware – is being routed around from both sides at once. The harder question is industrial: EnduroSat now has to run factories on two continents while holding the cost curve that justifies the raise. Watch whether the Sofia hub genuinely becomes the EU’s largest space and defence site, and whether the $1-per-gigabyte target starts repricing space data for everyone else.
Ten years ago, a Bulgarian space company raising $205M would have sounded like satire. This week it is a datapoint – and the pattern it belongs to is the one worth watching.
