Top 11 Energy-efficient Ship startups

Updated: Nov 07, 2025
|
These startups develop hybrid propulsion systems, improved hull designs, waste heat recovery systems and advanced vessel management systems, aiming to provide sustainable solutions for shipping.
1
PowerX
Country: Japan | Funding: ¥23.9B
PowerX brings power transfer technology to life, allowing for greater usage of renewable energy sources. In particular it develops battery tanker.
2
X Shore
Country: Sweden | Funding: $113.1M
X Shore creates high performance all-electric powered boats that are changing and charging the boat industry for a fossil free tomorrow.
3
Bound4blue
Country: Spain | Funding: $30.2M
Bound4blue is working on a unique renewable energy system for large vessels. It consists in the production of hydrogen and oxygen by means of electrolysis of seawater. The vessel is propelled by wind-driven wingsails, as water fills the ship’s turbines to produce mechanical energy, then transformed into electrical energy.
4
Candela
Country: Sweden | Funding: €24M
Candela Speed Boat is a Sweden's electric boat startup
5
Flux Marine
Country: USA | Funding: $15.9M
Flux Marine has set out to design and manufacture zero emissions electric boat motors with increased performance parameters compared to industry standards. Our ground-up design utilizes all the advantages of electric power, eliminating common failure points of existing gas engines.
6
GT Green Technologies
Country: UK | Funding: £5M
GT Green Technologies are wind propulsion experts offering tailored turn-key engineering solutions to the maritime industry to significantly reduce fuel consumption and greenhouse gas emissions for retrofit and newbuild vessels.
7
FeTu
Country: UK
FeTu specialises in reducing energy consumption and emissions through its self-developed two-stage turbine technology, which applications in the energy market and manufacturing industries including aerospace and marine.
8
iCat
Country: Croatia
iCat builds high speed electric solar passenger catamarans for coastal transportation
9
Voltaic Marine
Country: USA | Funding: $115K
Voltaic Marine provides new vision for high-performance watercraft.
10
Zin Boats
Country: USA
Zin Boats is a Seattle-based company that manufactures, engineered, and builds electric boats.
11
C-Power
Country: USA
C-Power offers energy generation and storage solutions for marine transportation.
  See also:
Alexander Gillet
Editor: Alexander Gillet
Alexander Gillet is a senior editor for EnergyStartups. He has a deep background in energy sector and startups. Alexander graduated from Emlyon Business School, a leading French business school specialized in entrepreneurship. He has helped several non-profit organizations dedicated to promoting environmental education and sustainability and has written over 250 articles on energy technology for various websites. In his free time, Alexander enjoys yoga, camping and exploring the Blue Ridge Mountains. You can contact Alexander at alexgillet(at)energystartups(dot)com