The economics of space infrastructure are undergoing a fundamental shift. While the aerospace sector once depended on custom-built satellites with multi-year development cycles accessible only to governments and large corporations, falling launch costs have moved the constraint elsewhere. The new bottleneck is no longer reaching orbit—it is manufacturing the hardware that operates there. One Central European firm is now betting that the future belongs to standardised, mass-produced spacecraft rather than bespoke engineering.
EnduroSat, a Bulgarian spacetech company, has closed a $205 million (€178 million) funding round to accelerate production of its next-generation satellite fleets. The round was co-led by Riot Ventures and Atreides Management, with backing from the European Innovation Council, Google Ventures, Founders Fund, House Capital, Lux Capital, Omnes Capital, Giant Ventures, Emphatic Capital and Endeavor Catalyst. The capital will fund the transition of the company's ESPA-class FRAME satellite line into high-volume serial production, achieving manufacturing repeatability comparable to consumer drones rather than traditional aerospace hardware.
Building satellites like drones
EnduroSat's approach centres on extreme modularity and software-defined architecture. The design eliminates traditional cabling, allowing a single technician to assemble and test a complete satellite in eight hours. This dramatically compresses time-to-orbit for both commercial and governmental constellation operators, eliminating the multi-year lead times that have historically constrained the aerospace sector.
EnduroSat is redefining how space infrastructure is built and deployed. Their production capabilities are aligned with the evolving demands of a new generation of satellite operators.
Stephen Marcus, Co-Founder and General Partner at Riot Ventures
More frequent, lower-cost access to orbit is expanding the set of companies that can leverage space-based capabilities. We are delighted to be investing in EnduroSat, which designs, produces, and operates the satellites those companies need, at a manufacturing cadence required to meet that demand.
Gavin Baker, Founder, Managing Partner & CIO at Atreides Management
From 200kg to five-ton fleets
The fresh capital will fund expansion into significantly larger spacecraft categories. EnduroSat's FRAME product line currently spans the FRAME S for 70 kg payloads through the FRAME L handling up to 300 kg. Strategic focus is now shifting toward the FRAME Max and beyond, targeting standardised satellite fleets weighing between 200 kg, 500 kg, and up to five tons. These heavier platforms are essential for energy-intensive missions including global broadband connectivity, high-resolution Earth observation, and in-orbit computing data centres.
Re-industrialising the EU and US
The funding will support opening a new high-volume manufacturing facility in the United States and further development of the European Union's largest space and defence hub. This expansion builds on the company's state-of-the-art Space Center in Sofia, Bulgaria, inaugurated late last year. The 188,340-square-foot facility contains advanced RF laboratories, ISO-classified clean rooms, hardware mechanical labs, and comprehensive space qualification testing grounds. By establishing manufacturing across two continents, EnduroSat positions itself within a broader political and economic drive to re-industrialise aerospace supply chains in both the EU and the US.
The one dollar per gigabyte ambition
The economic goal underlying this expansion is to reduce the cost of space data to approximately €0.92 per gigabyte. Current orbital data access costs hundreds of dollars per gigabyte, a price that excludes most small and medium enterprises. If EnduroSat achieves its target unit economics through drone-like mass production, space data becomes commoditised. At such reduced prices, new markets emerge: agricultural firms, logistics companies, and climate monitoring startups could integrate live space data into daily operations. The ultimate objective is transforming space from an exclusive, capital-intensive domain into an accessible, profitable software layer for virtually any business.
The vision remains untouched: democratize access to space data. Our job is to empower the innovators at the final frontier - eliminating complexity and tedious supply chains, and making their services profitable from the get-go. Now it's time to scale things up a notch. I'd like to thank Riot, Atreides and all our investors for the vote of confidence as we keep building dramatically larger-scale space infrastructure.
Raycho Raychev, Founder & CEO of EnduroSat
A rapid trajectory from Sofia to orbit
EnduroSat's rapid capital accumulation reflects the intensity of the modern space race. Founded in 2015 by Raycho Raychev, the company has evolved from a regional deep-tech venture into a globally dominant player. The current round follows an exceptionally active fundraising period. In May 2025, EnduroSat secured €43 million led by Founders Fund to scale its Gen3 ESPA-class satellites (200–500 kg). Months later, in October 2025, it raised $104 million (€90 million) to expand initial production in Sofia.
By consistently meeting manufacturing milestones, the Bulgarian firm has demonstrated that Central and Eastern Europe can produce world-class, globally competitive aerospace infrastructure. The Bulgarian national government has designated the Sofia facility a priority investment project, providing institutional backing that underscores the strategic importance of the space sector for the region's technological sovereignty. EnduroSat has already launched 103 satellites into orbit and delivered more than 200 for missions worldwide. As the industry shifts from custom builds toward mass production, success will be measured not only by daily production volumes but by how economically space data can be delivered to Earth.
