EnduroSat is a Bulgarian aerospace manufacturer specializing in software-defined satellites and turnkey satellite services. The company designs, builds, and operates modular small satellites and ESPA-class platforms that support missions in Earth observation, communications, and scientific research. Its infrastructure combines hardware, on-orbit operations, and data services to give commercial, government, and research customers faster, more affordable access to space. With a growing production footprint and a new Space Center in Sofia, EnduroSat is positioning itself as a key European player in scalable satellite constellations.
What Is EnduroSat and What Does It Do?
EnduroSat, founded in 2015 by Raycho Raychev, is a Sofia-based (Bulgaria) aerospace manufacturer focused on advanced satellite infrastructure.
The company develops software-defined nanosatellites and ESPA-class small satellites that combine modular hardware with flexible payload capabilities. Its platforms support missions such as hyperspectral imaging, SAR, broadband connectivity, and navigation, delivered through a constellations-as-a-service model for commercial, government, and research customers.
With a team of 215 employees as of March 2025, EnduroSat integrates design, manufacturing, testing, and mission operations under one roof, enabling rapid time-to-orbit and high-volume satellite production for multi-mission constellations.
How Much Funding Has EnduroSat Raised?
1. Early 2025 Funding Round
- Amount Raised: $10 million
- Date: February 2025
- Motivation: To support scaling of satellite manufacturing capacity and working capital ahead of larger growth rounds.
2. Gen3 ESPA-Class Expansion Round
- Amount Raised: $49 million (approx. €43 million)
- Date: May 2025
- Lead Investors: Founders Fund; participation from CEECAT Capital, Morphosis Capital, and other existing investors
- Motivation: To accelerate production of Gen3 ESPA-class satellites (200–500 kg), expand the constellations-as-a-service model, and strengthen European and U.S. operations.
3. New Space Center Growth Round
- Amount Raised: $104 million
- Date: October 2025
- Lead Investors: Riot Ventures, Google Ventures (GV), Lux Capital, European Innovation Council (EIC) Fund, Shrug Capital
- Motivation: To ramp up production at the new Sofia Space Center, target capacity of up to two ESPA-class satellites per day, and support large constellation operators needing faster, more reliable deployment.
Total Funding Raised: $173 million
Latest Funding Date: October, 2025
Key Investors
1. Founders Fund
- Details: A U.S. venture capital firm known for backing transformative technology and space companies, including several leading NewSpace ventures.
- Investment Focus Areas: Deep tech, aerospace, software, frontier technologies.
- Notable Investments: SpaceX, Varda Space Industries, Anduril (among others).
2. Google Ventures (GV)
- Details: The venture capital arm of Alphabet, GV backs high-growth technology companies globally and provides strategic support from the broader Google ecosystem.
- Investment Focus Areas: AI, cloud, enterprise software, health, frontier tech.
- Notable Investments: Uber, Slack, Stripe, Flatiron Health.
Where Is EnduroSat’s Headquarters?
EnduroSat is headquartered in Sofia, Bulgaria, a growing hub for European deep-tech and aerospace innovation. The company’s new Space Center in Sofia spans roughly 17,500 m² and includes RF labs, hardware and mechanical labs, ISO-classified clean rooms, and full space-qualification facilities.
What’s Next for EnduroSat?
EnduroSat is now focused on scaling production of its Gen3 ESPA-class satellites and expanding its constellations-as-a-service model for commercial and governmental operators. With its 2025 funding rounds totaling $173 million and a new Sofia Space Center capable of producing up to two satellites per day, the company aims to reduce time-to-orbit and enable flexible, multi-mission constellations at scale.
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