# Top 42 Seaweed Startups Worldwide by Funding (2026)

> The 42 best-funded seaweed startups worldwide, ranked by total funding raised: $1.7B combined. With founding year, headquarters and each company's rounds.

Source: https://millionrounds.com/top-lists/seaweed-startups (Millionrounds; every figure on the page links to its filing or article)

- 1 [**Fremantle Seaweed** Fremantle Seaweed is an Australian aquaculture and ocean-technology company located in Western Australia.](https://millionrounds.com/company/fremantle-seaweed) Fremantle Seaweed is an Australian aquaculture and ocean-technology company located in Western Australia. *Founded* - Perth, Australia **$1.4B** last round Dec 2025
- 2 [**Notpla** Notpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier.](https://millionrounds.com/company/notpla) Notpla is a London-based sustainable packaging startup founded in 2014 by Rodrigo García González and Pierre Paslier. *Founded* 2014 London, United Kingdom **$89M** last round Jul 2026
- 3 [**Alginor ASA** Alginor ASA seeks towards a sustainable and resource efficient future based on seaweed treasures from beyond the Arctic Circle.](https://millionrounds.com/company/alginor-asa) Alginor ASA seeks towards a sustainable and resource efficient future based on seaweed treasures from beyond the Arctic Circle. *Founded* 2014 Haugesund, Norway **$43M** last round Oct 2025
- 4 [**Sway** Sway Innovation Co., also known as Sway, is a California-based cleantech and materials company focused on developing sustainable packaging solutions.](https://millionrounds.com/company/sway) Sway Innovation Co., also known as Sway, is a California-based cleantech and materials company focused on developing sustainable packaging solutions. *Founded* 2020 Los Angeles, United States **$25M** last round Jan 2024
- 5 [**Blue Ocean Barns** Blue Ocean Barns is an agricultural technology company based in Kailua-Kona, Hawaii, founded in 2019.](https://millionrounds.com/company/blue-ocean-barns) Blue Ocean Barns is an agricultural technology company based in Kailua-Kona, Hawaii, founded in 2019. *Founded* 2019 San Diego, United States **$20M** last round Jul 2022
- 6 [**OCEANIUM** Oceanium develops innovative, all-natural food and nutraceutical products and sustainable materials from sustainably-sourced seaweed.](https://millionrounds.com/company/oceanium) Oceanium develops innovative, all-natural food and nutraceutical products and sustainable materials from sustainably-sourced seaweed. *Founded* - Oban, United Kingdom **$19M** last round Apr 2025
- 7 [**Samudra Oceans** Samudra Oceans is a London-based climate technology startup founded in 2022, focused on advancing ocean farming and blue carbon capture.](https://millionrounds.com/company/samudra-oceans) Samudra Oceans is a London-based climate technology startup founded in 2022, focused on advancing ocean farming and blue carbon capture. *Founded* 2022 London, United Kingdom **$14M** last round Jun 2025
- 8 [**Aqua Theon** Aqua Theon Inc.](https://millionrounds.com/company/aqua-theon) Aqua Theon Inc. *Founded* - Torrance, United States **$13M** last round Feb 2026
- 9 [**Bambrew** Bambrew is a Bengaluru-based cleantech startup founded in 2019, focused on manufacturing sustainable and biodegradable packaging materials.](https://millionrounds.com/company/bambrew) Bambrew is a Bengaluru-based cleantech startup founded in 2019, focused on manufacturing sustainable and biodegradable packaging materials. *Founded* 2018 Bengaluru, India **$11M** last round Jul 2025
- 10 [**Symbrosia** Symbrosia is a cleantech and biotechnology startup based in Kailua-Kona, Hawaii, founded in 2018.](https://millionrounds.com/company/symbrosia) Symbrosia is a cleantech and biotechnology startup based in Kailua-Kona, Hawaii, founded in 2018. *Founded* 2018 Kailua-Kona, United States **$5.8M** last round Dec 2025
- 11 [**Kelpi** Kelpi is a UK-based sustainable materials innovation company founded in 2020.](https://millionrounds.com/company/kelpi) Kelpi is a UK-based sustainable materials innovation company founded in 2020. *Founded* 2020 Bristol, United Kingdom **$5.5M** last round Feb 2026
- 12 [**B'ZEOS** 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](https://millionrounds.com/company/b-zeos) 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* 2017 Nyon, Switzerland **$5.2M** last round Nov 2024
- 13 [**Origin by Ocean** Origin by Ocean is a Finnish biotechnology company based in Espoo, founded in 2019.](https://millionrounds.com/company/origin-by-ocean) Origin by Ocean is a Finnish biotechnology company based in Espoo, founded in 2019. *Founded* 2019 Espoo, Finland **$5.0M** last round Apr 2023
- 14 [**Coast 4C** Coast 4C is revolutionizing sustainable seaweed supply.](https://millionrounds.com/company/coast-4c) Coast 4C is revolutionizing sustainable seaweed supply. *Founded* 2020 Sydney, Philippines **$5.0M** last round Jun 2026
- 15 [**Seaweed Solutions** Seaweed Solutions AS is a prominent Norwegian company specializing in seaweed genetics, seed supply, and cultivation technology.](https://millionrounds.com/company/seaweed-solutions) Seaweed Solutions AS is a prominent Norwegian company specializing in seaweed genetics, seed supply, and cultivation technology. *Founded* 2009 Trondheim, Norway **$4.7M** last round Jan 2023
- 16 [**Ocean Rainforest** Ocean Rainforest is a blue growth company based in Kaldbak, Faroe Islands, specializing in open-ocean seaweed cultivation and processing.](https://millionrounds.com/company/ocean-rainforest) Ocean Rainforest is a blue growth company based in Kaldbak, Faroe Islands, specializing in open-ocean seaweed cultivation and processing. *Founded* 2007 Kaldbak, Faroe Islands **$4.5M** last round Oct 2023
- 17 [**Cascadia Seaweed** Cascadia Seaweed Corp.](https://millionrounds.com/company/cascadia-seaweed) Cascadia Seaweed Corp. *Founded* 2019 Sidney, Canada **$2.8M** last round Dec 2024
- 18 [**Provectus Algae** Provectus Algae is an innovative Australian biotechnology company focused on optimizing microalgae and red seaweed to create high-value biobased chemicals and s](https://millionrounds.com/company/provectus-algae) Provectus Algae is an innovative Australian biotechnology company focused on optimizing microalgae and red seaweed to create high-value biobased chemicals and s *Founded* 2018 Sunshine Coast, Australia **$2.6M** last round Jul 2025
- 19 [**Macro Oceans** Macro Oceans is focused on building a kelp economy to support a low carbon future.](https://millionrounds.com/company/macro-oceans) Macro Oceans is focused on building a kelp economy to support a low carbon future. *Founded* 2020 West Sacramento, United States **$2.5M** last round Sept 2024
- 20 [**Nordic SeaFarm** Nordic SeaFarm is a producer of fair-trade seaweed and works with a range of food chain stakeholders to develop products and services.](https://millionrounds.com/company/nordic-seafarm) Nordic SeaFarm is a producer of fair-trade seaweed and works with a range of food chain stakeholders to develop products and services. *Founded* 2016 Gothenburg, Sweden **$2.5M** last round Aug 2024
- 21 [**North Sea Farmers** North Sea Farmers is the European Seaweed Association.](https://millionrounds.com/company/north-sea-farmers) North Sea Farmers is the European Seaweed Association. *Founded* 2011 The Hague, United States **$2.3M** last round Jul 2025
- 22 [**Seaweed Concept** Seaweed Concept is a marine biotechnology company which supply the high quality ingredients from algae.](https://millionrounds.com/company/seaweed-concept) Seaweed Concept is a marine biotechnology company which supply the high quality ingredients from algae. *Founded* - Plumieux, France **$2.1M** last round Feb 2025
- 23 [**Umaro Foods** Umaro Foods specializes in developing a plant-based protein source from ocean-farmed seaweed.](https://millionrounds.com/company/umaro-foods) Umaro Foods specializes in developing a plant-based protein source from ocean-farmed seaweed. *Founded* 2022 Albany, United States **$2.0M** last round Mar 2024
- 24 [**Soarce** Soarce synergizes seaweed and nanotechnology to produce high performing, protective, and low-carbon fabrics and leathers.](https://millionrounds.com/company/soarce) Soarce synergizes seaweed and nanotechnology to produce high performing, protective, and low-carbon fabrics and leathers. *Founded* 2021 Orlando, United States **$2.0M** last round Mar 2026
- 25 [**Óir na Farraige** ÓNF is a pioneering seaweed aquaculture venture.](https://millionrounds.com/company/oir-na-farraige) ÓNF is a pioneering seaweed aquaculture venture. *Founded* - Galway, Ireland **$1.8M** last round Apr 2026
- 26 [**Banyu** BANYU is a technology-enabled seaweed company based in Greater Jakarta, Indonesia, founded in December 2023.](https://millionrounds.com/company/banyu) BANYU is a technology-enabled seaweed company based in Greater Jakarta, Indonesia, founded in December 2023. *Founded* 2024 Indonesia **$1.3M** last round Jan 2025
- 27 [**Neptune Elements** Neptune Elements is a French food-tech startup founded in 2020, based in Camaret-sur-Mer, Brittany.](https://millionrounds.com/company/neptune-elements) Neptune Elements is a French food-tech startup founded in 2020, based in Camaret-sur-Mer, Brittany. *Founded* 2021 Paris, France **$1.0M** last round Jul 2022
- 28 [**Agoprene** Agoprene develops furniture foam from seaweed - completely free of petrochemicals.](https://millionrounds.com/company/agoprene) Agoprene develops furniture foam from seaweed - completely free of petrochemicals. *Founded* 2020 Barkaker, Denmark **$1.0M** last round Apr 2025
- 29 [**Seawith** Seawith is a biotechnology startup developing cell-cultured steak from seaweed.](https://millionrounds.com/company/seawith) Seawith is a biotechnology startup developing cell-cultured steak from seaweed. *Founded* 2019 Daegu **$839K** last round Jan 2022
- 30 [**Algapelago** Algapelago is a regenerative ocean farming company founded in 2021, focused on creating sustainable seaweed forests.](https://millionrounds.com/company/algapelago) Algapelago is a regenerative ocean farming company founded in 2021, focused on creating sustainable seaweed forests. *Founded* 2021 Appledore, United Kingdom **$807K** last round Sept 2025
- 31 [**PlantSea** PlantSea manufactures and develops sustainable products using seaweed and aquaculture materials.](https://millionrounds.com/company/plantsea) PlantSea manufactures and develops sustainable products using seaweed and aquaculture materials. *Founded* 2020 Gaerwen, United Kingdom **$709K** last round Feb 2026
- 32 [**BioPlaster Research** BioPlaster Research is a Mexican biotechnology and R&D company founded in 2019.](https://millionrounds.com/company/bioplaster-research) BioPlaster Research is a Mexican biotechnology and R&D company founded in 2019. *Founded* 2019 Progreso, Mexico **$655K** last round Nov 2025
- 33 [**BioMara** BioMara is a Scottish biotechnology company founded in 2022, based in Edinburgh.](https://millionrounds.com/company/biomara) BioMara is a Scottish biotechnology company founded in 2022, based in Edinburgh. *Founded* 2022 Edinburgh, United Kingdom **$653K** last round Dec 2024
- 34 [**ZeroCircle** Zerocircle is a Pune-based cleantech and biotechnology startup founded in 2020.](https://millionrounds.com/company/zerocircle) Zerocircle is a Pune-based cleantech and biotechnology startup founded in 2020. *Founded* 2020 Pune, India **$546K** last round Jan 2026
- 35 [**SUNSHIKI** We are a seaweed innovation company.](https://millionrounds.com/company/sunshiki) We are a seaweed innovation company. *Founded* 2024 Shibuya, Japan **$501K** last round Sept 2026
- 36 [**Seaweed Generation** Seaweed Generation is a developer of robotic technologies to harness the power of seaweed cultivation systems to counteract climate change.](https://millionrounds.com/company/seaweed-generation) Seaweed Generation is a developer of robotic technologies to harness the power of seaweed cultivation systems to counteract climate change. *Founded* 2021 London, United Kingdom **$365K** last round May 2023
- 37 [**Second Ocean** 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](https://millionrounds.com/company/second-ocean) 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* 2024 Hwasong **$354K** last round Dec 2024
- 38 [**Sacred Seaplants** Sacred Seaplants is a project development company building regenerative seaweed projects.](https://millionrounds.com/company/sacred-seaplants) Sacred Seaplants is a project development company building regenerative seaweed projects. *Founded* 2022 Vancouver, Canada **$250K** last round Dec 2022
- 39 [**Atlantic Kitchen** 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.](https://millionrounds.com/company/atlantic-kitchen) 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* 2012 London, United Kingdom **$211K** last round Feb 2014
- 40 [**Carbonwave** Carbonwave is a Public Benefit Corporation based in the U.S., founded in January 2020.](https://millionrounds.com/company/carbonwave) Carbonwave is a Public Benefit Corporation based in the U.S., founded in January 2020. *Founded* 2020 Puerto Morelos, United States **$100K** last round Jan 2024
- 41 [**Rootless** Rootless is a San Francisco-based startup founded in 2021 that specializes in seaweed-powered nutrition products aimed at supporting women’s hormonal health, pa](https://millionrounds.com/company/rootless) Rootless 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* 2021 San Francisco, United States **$50K** last round Jan 2013
- 42 [**Thalasso** Thalasso is an ocean start-up committed to sustainable seaweed management, turning the sargassum problem into a solution.](https://millionrounds.com/company/thalasso) Thalasso is an ocean start-up committed to sustainable seaweed management, turning the sargassum problem into a solution. *Founded* 2020 Florø, Norway **$40K** last round Jun 2024

**Total funding** how the list is ranked

**15 November 2026** updated nightly

**Rounds we track** source: Millionrounds

Companies 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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