The archive · Hardware & Devices · Product decision · 2025–2026
Bubble Robotics bets offshore operations no longer need people
EF matched a NASA/ETH engineer with a business founder; raised $5M seed, $4M LOIs for resident underwater robots.
Bubble Robotics
What the business is
Bubble Robotics builds resident underwater robots (BubbleDock docking station + BubbleBots robot fleet), autonomously inspecting, monitoring, and collecting data at sea for several consecutive months, covering wind turbine foundations, subsea cables, maritime safety, and environmental monitoring, charging on a robotics-as-a-service basis with zero upfront procurement for customers.
Starting capital：$5 million pre-seed (led by Episode1 Ventures, Asterion Ventures, and Norrsken Evolve, 2026-04)
How it started
In 2025, Patricia Apostol (NASA and ETH Zürich robotics engineering background) and Jean Crosetti (business and operations experience) met and formed a team at Entrepreneurs First’s kick-off weekend; EF co-founder Alice Bentinck described the pair as “world-class technical credibility + rare business instinct,” with strong customer obsession. The company is distributed across Paris, San Francisco, and Zurich.
What happened
Came out of stealth in April 2026, announcing a $5 million pre-seed (led by Episode1, Asterion, and Norrsken Evolve); at that time it had already received more than $4 million in letters of intent from offshore wind, maritime safety, and subsea infrastructure customers. The product has two parts: the BubbleDock docking station can be deployed from shore or a vessel and stay resident for up to 6 months; BubbleBots underwater robots carry cameras, sonar, multibeam echo sounders, hydrophones, and eDNA sensors, benchmarking against Saildrone, Saronic, Sea Machines, and others, with the differentiator being that they can remain on the seabed for long periods instead of being deployed for each mission.
How it ended up
Still building: plans to first land initial commercial systems in three markets—offshore wind, maritime safety, and subsea infrastructure—converting $4 million in letters of intent into revenue; public sources do not yet have first deployment or revenue figures, and the differentiation of “resident versus dispatching a vessel each time” must be proven by delivery.
Background
Bubble Robotics builds “permanent offshore labor”: the BubbleDock docking station can be deployed from shore or a vessel and stay resident for up to 6 months, while BubbleBots underwater robots autonomously conduct inspections, monitoring, and data collection for several consecutive months; it charges on a robotics-as-a-service basis with zero upfront procurement for customers, covering offshore wind, subsea cables, maritime safety, and environmental monitoring.
Founding came from Entrepreneurs First matchmaking: Patricia Apostol, a robotics engineer from NASA and ETH Zürich, and Jean Crosetti, with business and operations experience, formed a team at EF’s kick-off weekend in 2025. EF co-founder Alice Bentinck said the pair have “world-class technical credibility + rare business instinct,” with strong customer obsession; the company is distributed across Paris, San Francisco, and Zurich.
The wedge is money: offshore inspections can cost up to $100,000 per day, and the CEO says 80–90% of that is vessel and crew costs. In April 2026, Bubble came out of stealth, announcing a $5 million pre-seed (led by Episode1, Asterion, and Norrsken Evolve), and said it had already received more than $4 million in letters of intent from offshore wind, maritime safety, and subsea infrastructure customers.
The product benchmarks against Saildrone, Saronic, and Sea Machines: the differentiator is that Bubble’s robots can remain underwater long-term, while most AUVs/ROVs must be redeployed for each mission. As of September 2026, the company is still building, planning to first land in three markets and convert LOIs into revenue; public sources do not yet have first deployment or revenue figures.
What has to be true
- EF’s value is pairing: Apostol (technical) and Crosetti (business) formed a team at kick-off; complementary capabilities were a precondition.
- The wedge is extremely expensive: offshore inspections cost $100,000/day, 80–90% from vessels and crew; replacing it cuts the largest cost.
- Business model tied to physical form: docking station + resident robots makes continuous presence a selling point; RaaS converts capex to opex.
- LOIs first, delivery later: $4M in LOIs proves demand, but reliability, compliance, and scalability are the real tests.
What can be applied
Turns expensive, scarce into resident, subscribable: changes from vessel chartering to data subscriptions, but after LOIs, the bet is delivering resident reliability.
Aftermath
As of 2026-09-01: Bubble Robotics is still building—after the $5 million pre-seed was received, it plans to first land initial systems in offshore wind, maritime safety, and subsea infrastructure, converting $4 million in LOIs into recurring revenue; public sources have not shown first deployment or revenue figures, and the company describes itself as “resident infrastructure for the ocean.”
Sources
- Bubble Robotics emerges from stealth with $5M to scale autonomous ocean robotics
- Norrsken Evolve backs Bubble Robotics' $5M raise to deploy an autonomous workforce at sea
- Bubble Robotics Announces Pre-Seed Round To Build The Ocean's Autonomous Workforce
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