Top list · Worldwide
Seaweed startups worldwide
42 seaweed startups worldwide have raised money in rounds we track. These are the 42 that have raised the most, $1.7B between them, with the United States the most common home.
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Fremantle SeaweedFremantle Seaweed is an Australian aquaculture and ocean-technology company located in Western Australia.Fremantle Seaweed is an Australian aquaculture and ocean-technology company located in Western Australia.
Founded -Perth, Australia$1.4Blast round Dec 2025 - 2
NotplaNotpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier.Notpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier.
Founded 2014London, United Kingdom$89Mlast round Jul 2026 - 3
Alginor ASAAlginor ASA seeks towards a sustainable and resource efficient future based on seaweed treasures from beyond the Arctic Circle.Alginor ASA seeks towards a sustainable and resource efficient future based on seaweed treasures from beyond the Arctic Circle.
Founded 2014Haugesund, Norway$43Mlast round Oct 2025 - 4
SwaySway Innovation Co., also known as Sway, is a California-based cleantech and materials company focused on developing sustainable packaging solutions.Sway Innovation Co., also known as Sway, is a California-based cleantech and materials company focused on developing sustainable packaging solutions.
Founded 2020Los Angeles, United States$25Mlast round Jan 2024 - 5
Blue Ocean BarnsBlue Ocean Barns is an agricultural technology company based in Kailua-Kona, Hawaii, founded in 2019.Blue Ocean Barns is an agricultural technology company based in Kailua-Kona, Hawaii, founded in 2019.
Founded 2019San Diego, United States$20Mlast round Jul 2022 - 6
OCEANIUMOceanium develops innovative, all-natural food and nutraceutical products and sustainable materials from sustainably-sourced seaweed.Oceanium develops innovative, all-natural food and nutraceutical products and sustainable materials from sustainably-sourced seaweed.
Founded -Oban, United Kingdom$19Mlast round Apr 2025 - 7
Samudra OceansSamudra Oceans is a London-based climate technology startup founded in 2022, focused on advancing ocean farming and blue carbon capture.Samudra Oceans is a London-based climate technology startup founded in 2022, focused on advancing ocean farming and blue carbon capture.
Founded 2022London, United Kingdom$14Mlast round Jun 2025 - 8
Aqua TheonAqua Theon Inc.Aqua Theon Inc.
Founded -Torrance, United States$13Mlast round Feb 2026 - 9
BambrewBambrew is a Bengaluru-based cleantech startup founded in 2019, focused on manufacturing sustainable and biodegradable packaging materials.Bambrew is a Bengaluru-based cleantech startup founded in 2019, focused on manufacturing sustainable and biodegradable packaging materials.
Founded 2018Bengaluru, India$11Mlast round Jul 2025 - 10
SymbrosiaSymbrosia is a cleantech and biotechnology startup based in Kailua-Kona, Hawaii, founded in 2018.Symbrosia is a cleantech and biotechnology startup based in Kailua-Kona, Hawaii, founded in 2018.
Founded 2018Kailua-Kona, United States$5.8Mlast round Dec 2025 - 11
KelpiKelpi is a UK-based sustainable materials innovation company founded in 2020.Kelpi is a UK-based sustainable materials innovation company founded in 2020.
Founded 2020Bristol, United Kingdom$5.5Mlast round Feb 2026 - 12
B'ZEOSB'ZEOS is a green-tech and blue-tech company based in Oslo, Norway, focused on transforming the packaging industry by replacing fossil fuel-based plastics with B'ZEOS is a green-tech and blue-tech company based in Oslo, Norway, focused on transforming the packaging industry by replacing fossil fuel-based plastics with
Founded 2017Nyon, Switzerland$5.2Mlast round Nov 2024 - 13
Origin by OceanOrigin by Ocean is a Finnish biotechnology company based in Espoo, founded in 2019.Origin by Ocean is a Finnish biotechnology company based in Espoo, founded in 2019.
Founded 2019Espoo, Finland$5.0Mlast round Apr 2023 - 14
Coast 4CCoast 4C is revolutionizing sustainable seaweed supply.Coast 4C is revolutionizing sustainable seaweed supply.
Founded 2020Sydney, Philippines$5.0Mlast round Jun 2026 - 15
Seaweed SolutionsSeaweed Solutions AS is a prominent Norwegian company specializing in seaweed genetics, seed supply, and cultivation technology.Seaweed Solutions AS is a prominent Norwegian company specializing in seaweed genetics, seed supply, and cultivation technology.
Founded 2009Trondheim, Norway$4.7Mlast round Jan 2023 - 16
Ocean RainforestOcean Rainforest is a blue growth company based in Kaldbak, Faroe Islands, specializing in open-ocean seaweed cultivation and processing.Ocean Rainforest is a blue growth company based in Kaldbak, Faroe Islands, specializing in open-ocean seaweed cultivation and processing.
Founded 2007Kaldbak, Faroe Islands$4.5Mlast round Oct 2023 - 17
Cascadia SeaweedCascadia Seaweed Corp.Cascadia Seaweed Corp.
Founded 2019Sidney, Canada$2.8Mlast round Dec 2024 - 18
Provectus AlgaeProvectus Algae is an innovative Australian biotechnology company focused on optimizing microalgae and red seaweed to create high-value biobased chemicals and sProvectus Algae is an innovative Australian biotechnology company focused on optimizing microalgae and red seaweed to create high-value biobased chemicals and s
Founded 2018Sunshine Coast, Australia$2.6Mlast round Jul 2025 - 19
Macro OceansMacro Oceans is focused on building a kelp economy to support a low carbon future.Macro Oceans is focused on building a kelp economy to support a low carbon future.
Founded 2020West Sacramento, United States$2.5Mlast round Sept 2024 - 20
Nordic SeaFarmNordic SeaFarm is a producer of fair-trade seaweed and works with a range of food chain stakeholders to develop products and services.Nordic SeaFarm is a producer of fair-trade seaweed and works with a range of food chain stakeholders to develop products and services.
Founded 2016Gothenburg, Sweden$2.5Mlast round Aug 2024 - 21
North Sea FarmersNorth Sea Farmers is the European Seaweed Association.North Sea Farmers is the European Seaweed Association.
Founded 2011The Hague, United States$2.3Mlast round Jul 2025 - 22
Seaweed ConceptSeaweed Concept is a marine biotechnology company which supply the high quality ingredients from algae .Seaweed Concept is a marine biotechnology company which supply the high quality ingredients from algae .
Founded -Plumieux, France$2.1Mlast round Feb 2025 - 23
Umaro FoodsUmaro Foods specializes in developing a plant-based protein source from ocean-farmed seaweed.Umaro Foods specializes in developing a plant-based protein source from ocean-farmed seaweed.
Founded 2022Albany, United States$2.0Mlast round Mar 2024 - 24
SoarceSoarce synergizes seaweed and nanotechnology to produce high performing, protective, and low-carbon fabrics and leathers.Soarce synergizes seaweed and nanotechnology to produce high performing, protective, and low-carbon fabrics and leathers.
Founded 2021Orlando, United States$2.0Mlast round Mar 2026 - 25
Óir na FarraigeÓNF is a pioneering seaweed aquaculture venture.ÓNF is a pioneering seaweed aquaculture venture.
Founded -Galway, Ireland$1.8Mlast round Apr 2026 - 26
BanyuBANYU is a technology-enabled seaweed company based in Greater Jakarta, Indonesia, founded in December 2023.BANYU is a technology-enabled seaweed company based in Greater Jakarta, Indonesia, founded in December 2023.
Founded 2024Indonesia$1.3Mlast round Jan 2025 - 27
Neptune ElementsNeptune Elements is a French food-tech startup founded in 2020, based in Camaret-sur-Mer, Brittany.Neptune Elements is a French food-tech startup founded in 2020, based in Camaret-sur-Mer, Brittany.
Founded 2021Paris, France$1.0Mlast round Jul 2022 - 28
AgopreneAgoprene develops furniture foam from seaweed - completely free of petrochemicals.Agoprene develops furniture foam from seaweed - completely free of petrochemicals.
Founded 2020Barkaker, Denmark$1.0Mlast round Apr 2025 - 29
SeawithSeawith is a biotechnology startup developing cell-cultured steak from seaweed.Seawith is a biotechnology startup developing cell-cultured steak from seaweed.
Founded 2019Daegu$839Klast round Jan 2022 - 30
AlgapelagoAlgapelago is a regenerative ocean farming company founded in 2021, focused on creating sustainable seaweed forests.Algapelago is a regenerative ocean farming company founded in 2021, focused on creating sustainable seaweed forests.
Founded 2021Appledore, United Kingdom$807Klast round Sept 2025 - 31
PlantSeaPlantSea manufactures and develops sustainable products using seaweed and aquaculture materials.PlantSea manufactures and develops sustainable products using seaweed and aquaculture materials.
Founded 2020Gaerwen, United Kingdom$709Klast round Feb 2026 - 32
BioPlaster ResearchBioPlaster Research is a Mexican biotechnology and R&D company founded in 2019.BioPlaster Research is a Mexican biotechnology and R&D company founded in 2019.
Founded 2019Progreso, Mexico$655Klast round Nov 2025 - 33
BioMaraBioMara is a Scottish biotechnology company founded in 2022, based in Edinburgh.BioMara is a Scottish biotechnology company founded in 2022, based in Edinburgh.
Founded 2022Edinburgh, United Kingdom$653Klast round Dec 2024 - 34
ZeroCircleZerocircle is a Pune-based cleantech and biotechnology startup founded in 2020.Zerocircle is a Pune-based cleantech and biotechnology startup founded in 2020.
Founded 2020Pune, India$546Klast round Jan 2026 - 35
SUNSHIKIWe are a seaweed innovation company.We are a seaweed innovation company.
Founded 2024Shibuya, Japan$501Klast round Sept 2026 - 36
Seaweed GenerationSeaweed Generation is a developer of robotic technologies to harness the power of seaweed cultivation systems to counteract climate change.Seaweed Generation is a developer of robotic technologies to harness the power of seaweed cultivation systems to counteract climate change.
Founded 2021London, United Kingdom$365Klast round May 2023 - 37
Second OceanAt Second Ocean, we tackle the critical challenges in seaweed cultivation worsened by global warming, which has reduced production by 13.4% in 2023 and doubled At Second Ocean, we tackle the critical challenges in seaweed cultivation worsened by global warming, which has reduced production by 13.4% in 2023 and doubled
Founded 2024Hwasong$354Klast round Dec 2024 - 38
Sacred SeaplantsSacred Seaplants is a project development company building regenerative seaweed projects.Sacred Seaplants is a project development company building regenerative seaweed projects.
Founded 2022Vancouver, Canada$250Klast round Dec 2022 - 39Atlantic KitchenAtlantic Kitchen believes the best tastes in life are wild, and that the most wonderfully wild tastes of all can be found in the pure waters of the Atlantic Ocean.
Atlantic Kitchen believes the best tastes in life are wild, and that the most wonderfully wild tastes of all can be found in the pure waters of the Atlantic Ocean.
Founded 2012London, United Kingdom$211Klast round Feb 2014 - 40
CarbonwaveCarbonwave is a Public Benefit Corporation based in the U.S., founded in January 2020.Carbonwave is a Public Benefit Corporation based in the U.S., founded in January 2020.
Founded 2020Puerto Morelos, United States$100Klast round Jan 2024 - 41
RootlessRootless is a San Francisco-based startup founded in 2021 that specializes in seaweed-powered nutrition products aimed at supporting women’s hormonal health, paRootless is a San Francisco-based startup founded in 2021 that specializes in seaweed-powered nutrition products aimed at supporting women’s hormonal health, pa
Founded 2021San Francisco, United States$50Klast round Jan 2013 - 42
ThalassoThalasso is an ocean start-up committed to sustainable seaweed management, turning the sargassum problem into a solution.Thalasso is an ocean start-up committed to sustainable seaweed management, turning the sargassum problem into a solution.
Founded 2020Florø, Norway$40Klast round Jun 2024
Perth, Australia
London, United Kingdom
Haugesund, Norway
Los Angeles, United States
Bengaluru, India
Nyon, Switzerland
Espoo, Finland
Sydney, Philippines
Kaldbak, Faroe Islands
Sidney, Canada
Gothenburg, Sweden
Plumieux, France
Galway, Ireland
Indonesia
Barkaker, Denmark
Progreso, Mexico
Shibuya, JapanCompanies whose own description names this theme, ranked by the total they have raised in rounds we hold. Nobody pays to be on a list.
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