Company · Energy & Climate

bound4blue

bound4blue.com ↗ ·Barcelona ·Series B

bound4blue develops eSAIL, a rigid suction-sail wind-propulsion system for cargo ships and tankers that cuts fuel consumption and emissions by up to 40% with autonomous, crew-free operation. Founded in 2014 and headquartered in Spain (Barcelona/Cantabria) with regional offices in Singapore and China, the company has installed eSAILs on vessels for owners including Odfjell and EPS. It closed a $44M growth round in December 2025 led by OCTAVE Capital and Katapult Ocean, following a ~$17.1M Series A in 2023.

Founded
2014
Founders
3
News
0
Rounds
3
Investors
12
SectorsMaritime technology, Wind propulsion, Shipping decarbonization, Climate tech Start-up MapEnergy & Climate › Clean energy generation hardware

Profile updated 31 Jul 2026

Founders

Cristina Aleixendri
COO & Co-founder
David Ferrer Desclaux
CTO & Co-founder
José M. Bermúdez
CEO & Co-founder

Global models 5

Norsepower
Finland · www.norsepower.com ↗
Direct competitor building rotor/wind-assist sail systems retrofitted to cargo ships to cut fuel and emissions, the same product category and customer base as bound4blue's eSAIL.
~$70MComparable
Airseas
France · airseas.com ↗
Airbus-spun-out wind-propulsion company using an automated kite (Seawing) instead of a rigid sail, targeting the same fuel-saving/decarbonization value proposition for cargo vessels.
~$70M (est., acquired by K Line in 2024)Comparable
Smart Green Shipping
United Kingdom · smartgreenshipping.com ↗
Develops FastRig, a retractable wingsail retrofit for cargo ships aimed at the same wind-assisted fuel and emissions reduction market.
~$13MComparable
Econowind
Netherlands · econowind.nl ↗
Makes VentoFoil wind-assist sails for deep-sea shipping, a close product and business-model match to bound4blue's suction sails.
~$4MComparable
Anemoi Marine Technologies
United Kingdom · anemoimarine.com ↗
Develops rotor sail wind-assisted propulsion systems for bulk carriers and tankers, competing directly in the same retrofit wind-propulsion niche.
~$3MComparable

Investors 12

Aciturri
aciturri.com
Investor Spain
Arcano Partners
www.arcanopartners.com
Investor Spain
CDTI (Innvierte SICC)
www.cdti.es
Investor Spain
EIC Fund
eic.ec.europa.eu
Investor Luxembourg
GTT Strategic Ventures
www.gttventures.com ↗
Investor France
KAI Capital
kaicapital.es ↗
Investor Spain
Katapult Ocean
www.katapultocean.com ↗
Investor Norway
Investor Netherlands
Motion Ventures
www.motion.vc ↗
Investor Singapore
OCTAVE Capital
www.octavecapital.co ↗
Investor Singapore
Investor Monaco
Investor France

Funding rounds 3

Series B · $44M
The Cantabria-based wind-propulsion company raised $44M (≈€37.8M) to industrialise production of its eSAIL suction sails and expand manufact…
2025-12-09
Series A · €15.9M
Barcelona-based bound4blue, which builds wind-assisted (suction sail) propulsion systems for ships, closed a €15.9M Series A led by GTT Stra…
2023-09-07
Series A · €5M
bound4blue makes eSAIL rigid wingsails, an automated wind-assisted propulsion system that cuts fuel use and emissions for ships. It closed a…
2021-06-30

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