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Offshore collection – Caribbean coastline & sargassum
Named Jeune Entreprise
Innovante
4 patents
filed
BPI
French Tech
40 Next
Blue Tech Index
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The context

Sargassum: a coastal challenge turned industrial opportunity

Since 2011, the Caribbean has suffered massive sargassum strandings that damage coastlines, disrupt ecosystems and weigh on hotel and municipal budgets. These brown algae can also become a usable biomass.Sargawatt works on the key link: collect better, cut costs and make the material accessible to those who valorize it.

Sargassum animation
38 M t

of sargassum detected in 2025 across the tropical Atlantic, Caribbean and Gulf of Mexico.

2 M t +

per month can reach the coast during seasonal peaks.

100 M$ +

per year in costs for the Mexican hotel sector.

40 +

countries and territories exposed in the Caribbean basin.

Sources: University of South Florida Optical Oceanography Lab / NOAA Sargassum Outlook · Scientific Reports 2025 – Jouanno et al. · Reuters · Wired · Caribbean Tourism Organization / World Bank.

Two answers, one resource

The two Sargawatt paths

Depending on your role, Sargawatt secures biomass access — and cuts collection cost.

Fresh Caribbean sargassum, raw material for industrial and R&D projects
Fresh biomass
Pathway 01 – Sargassum biomass

Caribbean sargassum for industry and R&D

A source of algal biomass for manufacturers, laboratories and pilot projects looking for a reliable, traceable material adapted to their process.

  • 01Origin: French Antilles
  • 02Formats: fresh, dried, crushed or packaged
  • 03Volumes: sample, pilot, recurring supply
  • 04Analyzes and specifications available according to project
Discover the sargassum offer
SargaJet at sea
Path 02 — SargaJet® + SargaMap

Collect at sea, anticipate strandings, cut costs

The SargaJet® is an offshore collection solution, designed to reduce the operational cost of sargassum management. SargaMap helps to better anticipate arrivals.

  • 01Collection before stranding
  • 02Reduction in collection costs
  • 03Low‑tech, robust, patented system
  • 04Forecasting and decision support with SargaMap
Discover SargaJet®
The team

A founding team rooted in Martinique, but active across the Caribbean

Portrait

Matthieu Bergot

Founder · CEO

Manages the strategy and deployment of Sargawatt in Martinique and the Caribbean.

Portrait

Bruno Sainte-Rose

Co-founder · PhD · CTO

Leads R&D and engineering of collection and forecasting.