Endurance Energy
Facts
- HQ
- Seattle
- Sectors
- Electric Power Generation
- Founded
- 2025
- Employees
- 40
- Stage
- Seed
Endurance Energy to Deploy 100-kW Geothermal Generator to Oregon Seafloor in September
Seattle startup Endurance Energy will deploy a 100-kilowatt geothermal generator to an undersea hydrothermal vent off Oregon in September to test whether undersea volcanoes can supply reliable, emissions-free baseload power.
Seattle’s ‘Third Act’: VCs Say Local Superstars Are Deep-Tech Startups Building Rockets, Geothermal Plants and Autonomous Vehicles
Two Seattle venture capitalists argue that the city’s next wave of superstar startups are already here but focus on deep tech—intelligent machines and physical products like rockets, geothermal plants and autonomous off-road vehicles—rather than pure software. They frame this shift as Seattle’s "Third Act," building on maritime/aerospace roots (Act I) and the software/cloud boom (Act II) to combine hardware and software using local infrastructure and talent.
Endurance Energy to Deploy 100 kW 'Adélie' Generator to Oregon Undersea Volcano on Sept. 7
Seattle startup Endurance Energy is preparing to deploy Adélie, a 100-kilowatt underwater geothermal generator, to an undersea volcano off Oregon on Sept. 7, aiming to tap 750°F hydrothermal fluids and scale undersea geothermal power. Founded by ex-SpaceX engineer Andrew Redd in January 2025, the company operates from a newly expanded 25,000-square-foot Seattle facility and has completed four prior ocean-floor deployments.
Ascend series: Seattle’s ‘Third Act’ — physical AI startups on Lake Union signal a shift toward software-enabled hardware
The piece reports from Lake Union to argue Seattle is entering a third industrial era—'physical AI'—where hardware-enabled intelligent machines mix with legacy maritime and aerospace industries, exemplified by startups like Overland, Anduril, Brinc, and Endurance Energy. The authors say Seattle has the talent, infrastructure, and institutions to lead but needs more risk-taking, investor capital for hardware, and pro-innovation policy to fully capitalize on this shift.
Helion’s $465M Series G Values Everett Fusion Firm Above $15B, Tops Seattle-Area 2Q VC Deals
Everett fusion-energy company Helion led greater Seattle-area 2Q venture capital deals with a $465 million Series G that valued it above $15 billion, making up nearly one-third of the region’s $1.5 billion in 2Q funding amid a year-over-year decline from $2.3 billion in 2Q 2025.
Seattle's Endurance Energy Raises $54M to Develop Deep-Sea Geothermal Power, Targets Grid Delivery in Two Years
Seattle startup Endurance Energy, led by former SpaceX engineer Andrew Redd, raised $54 million to develop deep-sea geothermal power technology and plans to deliver electricity to the grid within two years. The company aims to produce gigawatt-scale energy by deploying its 100-kilowatt generator 'Adelie' to the Juan de Fuca ridge this fall.
SendCutSend Raises $110M Led by Stripe Founders and Sequoia at $1B Valuation for Custom Metal Manufacturing
SendCutSend, an on-demand custom metal manufacturing startup founded in 2018, raised $110 million in funding led by Stripe founders and Sequoia Capital at a $1 billion valuation after previously bootstrapping. The boost in orders from AI-related industries motivated the company to accept venture capital backing.
Endurance Energy Operates from Seattle’s Lake Union Waterfront to Advance Subsea Geothermal Renewable Energy
Endurance Energy is based on Seattle's north Lake Union waterfront, enabling direct loading of seafloor drills and prototype generators onto vessels. The company embraces the Seattle maritime heritage and the potential of subsea geothermal renewable energy.
Endurance Energy Bases Subsea Geothermal Operations in Seattle’s North Lake Union Waterfront Hub
Endurance Energy is based on the waterfront of north Lake Union in Seattle, leveraging its maritime location to load seafloor drills and prototype generators for offshore operations. The company's work in subsea geothermal energy aligns well with Seattle's maritime heritage and vibrant local talent.
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