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DAIVIN!

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Tankless Dive Gear - Breath Autonomy at Sea, Land & Space

Winter 2026Founded 20251 peopleSan Francisco, CA, USA
AI insightcan contain mistakes
Extreme Environment Breath SystemsHardwareDivers, astronauts, specialized industriesLow competition
Moat
Novel water-extraction and storage technology; hardware IP and patents; safety certifications and training relationships.
Key risk
Complex regulatory approval (diving, space agencies); high capex; unproven technology at scale; limited addressable market.
Why now
Space exploration acceleration (SpaceX, NASA missions); growing commercial diving industry.
Competitors
Traditional tank manufacturers (Scubapro, Aqualung), emerging rebreather tech

About

DAIVIN! builds tankless dive gear that unlocks breath autonomy in extreme environments. Starting from underwater environment our mission is to remove the need for dangerous, heavy and bulky oxygen tanks in space, air and on land and replace them with water!

Founders ยท 1

Leo Kankkunen
Leo KankkunenFounder & CEO

Invented and tested the first-ever tankless dive gear in history. Served in the military and became the youngest top-certified electrical engineer in Europe, authorized to independently sign electrical High-Voltage power line constructions. B.Eng. in Electrical Engineering and an M.Sc. in IEM and Innovation Management. A certified diver and two-time founder with a strong background in deep tech and innovation.

Launch

Launched on Y Combinator ยท Jan 2026
View launch post โ†—

We use electrolysis to extract oxygen from water and convert it into breathable gas for divers

DAIVIN! develops a vest-and-battery system that uses electrolysis to extract oxygen from water, producing breathable gas for divers on-demand, enabling tankless underwater breathing up to about one hour of extra gas and depths up to 200 meters; the product targets professional/commercial divers seeking safer, lighter, and more flexible diving without tanks.

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