Bbound4blue
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.
SectorsMaritime technology, Wind propulsion, Shipping decarbonization, Climate tech
Start-up MapEnergy & Climate › Clean energy generation hardware
Founders
C
Cristina Aleixendri
COO & Co-founder
D
David Ferrer Desclaux
CTO & Co-founder
J
José M. Bermúdez
CEO & Co-founder
Global models 5
NNorsepower
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
AAirseas
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
SSmart 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
EEconowind
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
AAnemoi 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
In the same niche 28 others
See all in the Start-ups Map →
Notes: Most funded first
Investors 17
Open as list →
CCentro para el Desarrollo Tecnológico y la Innovación
www.cdti.es
AArcano Partners
www.arcanopartners.com
EEIC Fund
eic.ec.europa.eu
GGTT Strategic Ventures
KKatapult Ocean
OOCTAVE Capital
KKAI Capital
OOcean Born Foundation
SShift4Good
A
Aciturri Aeronáutica
EEIT Climate-KIC
LLouis Dreyfus Company Ventures
MMotion Ventures
O
Odfjell family office
RReOcean Fund
S
Sun Returns
SSustainable Ocean Alliance
Funding rounds 3
| Date | Round | Amount | Lead |
|---|---|---|---|
| 2025-12-09 | Series B (estimated) | $44M |
OCTAVE Capital, Katapult Ocean
+7 more
|
| 2023-09-07 | Series A | €15.9M |
GTT Strategic Ventures
+8 more
|
| 2021-06-30 | Series A (estimated) | approximately €5M |
Lead not disclosed
+5 more
|
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