Cocoon
London, GB · Founded 2023 · 12 known investors
Find your way into Cocoon
294 people in our graph share verified history with the Cocoon team — schools, employers, funds. One of them is your warm intro.
Amanda Dawsonunlockedknows Eliot Brooks · together at University of Oxford (overlapped)
×8knows the team · via University of Oxford
knows the team · via Travelex
knows the team · via Tandem
knows the team · via New Entrepreneurs Foundation
Cocoon develops low-carbon construction materials, including LoopCem, a supplementary cementitious material (SCM) made by valorizing electric arc furnace (EAF) steel slag to reduce concrete emissions. It serves the construction and cement industry with the aim of enabling net-zero building.
Founders & leadership
Cocoon was founded in 2023 by Eliot Brooks and William Knapp.
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Eliot Brooksin𝕏CEOEliot Brooks previously co-founded Thriva Health, where he served as COO and director from 2016 to 2023, and earlier worked in product at Tandem Bank and managed international payments at Travelex. He took part in the New Entrepreneurs Foundation's 2014 cohort and chaired the school governors at The Courtyard school in Islington from 2022 to 2025.
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William KnappinFounder
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Freddie ScottinCTO
Investors · 12
2150London
Brick Mortar VenturesSan Francisco
Gigascale CapitalPalo Alto
SOSVNew York · $30K – $550K
The Venture CollectiveMiami Beach · $100K – $500K
Wireframe VenturesSan Francisco · $500K – $2M
First Round CapitalreportedSan Francisco · $1M – $7M
Index VenturesreportedSan Francisco · $540K – $10.8M
Magnify VenturesreportedSanta Monica · $250K – $2M
SpringbankreportedNew York · $500K – $1.5M
XYZ Venture CapitalreportedSan Francisco · $10K – $5M
Also in the syndicate · 1
SemperVirens
Funding
SEC filings, press & company announcements$15M disclosed across 1 of 4 rounds · 2021–2026
- $15MSeries AMar 2026 · 3 sourcesSource ↗
- Undisclosed amountPre-SeedAug 2024Source ↗
- Undisclosed amountSeries ASep 2021 · 2 sources
Index Ventures (lead), First Round Capital, Magnify Ventures, SemperVirens, Springbank Collective, XYZ
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Competitors · 7
by search overlap
Carbon Cure Technologies7 shared keywordsCarbonCure develops technologies that inject captured CO₂ into fresh concrete during mixing, where it mineralizes and permanently embeds in the material while reducing the amount of cement needed. The company sells these systems to cement and concrete producers to help lower the embodied carbon of concrete and the built environment.
Carbon6 shared keywordsCarbon provides 3D printing hardware, photopolymer resins, and computational design software that brands use to design, develop, and manufacture high-performance products. Its technology targets applications in comfort and protection products across consumer and industrial markets.
Solid Carbon4 shared keywordsSolid Carbon develops carbon-based building materials for use in concrete and construction to reduce embodied carbon in infrastructure. The company operates at the intersection of climate strategy, construction constraints, and materials science.
Living Carbon4 shared keywordsLiving Carbon develops precision-bred tree varieties and reforestation techniques to convert marginal land into carbon-sequestering ecosystems. The company targets climate mitigation through enhanced photosynthesis and biodiversity restoration.
Brimstone4 shared keywordsBrimstone develops co-production processes to manufacture cement, steel, aluminum, and other critical minerals from a single feedstock in an integrated facility. The company targets heavy industry producers seeking lower-cost, more sustainable production methods for materials essential to construction and manufacturing.
CarbonFree3 shared keywordsCarbonFree operates industrial-scale carbon mineralization facilities that capture CO2 from industrial processes and convert it into carbon-negative products. The company serves industrial manufacturers and chemical buyers seeking sustainable production and carbon reduction solutions.
CarbonBuilt3 shared keywordsCarbonBuilt makes low-carbon concrete masonry and hardscape products by replacing up to half the cement with its proprietary upcycled binder, reducing the carbon footprint of concrete production. It targets the construction materials market with products priced and performing comparably to conventional concrete.
Companies competing with Cocoon for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Frequently asked questions
- What does Cocoon do?
- Cocoon develops low-carbon construction materials, including LoopCem, a supplementary cementitious material (SCM) made by valorizing electric arc furnace (EAF) steel slag to reduce concrete emissions. It serves the construction and cement industry with the aim of enabling net-zero building.
- Who founded Cocoon?
- Cocoon was founded by Eliot Brooks, William Knapp in 2023.
- Who are Cocoon's investors?
- Cocoon's investors include 2150, Brick Mortar Ventures, Gigascale Capital, SOSV, The Venture Collective, Wireframe Ventures, First Round Capital, Index Ventures and 3 more.
- How much funding has Cocoon raised?
- Cocoon has disclosed $15M raised across 1 of its 4 known rounds.
- Where is Cocoon headquartered?
- Cocoon is headquartered in London, GB.