Sector portfolio · VC firm · United States

Lowercarbon Capital's Cleantech portfolio

Lowercarbon Capital has backed 18 Cleantech startups in rounds we track, $3.5B between them, shown by the stage each has reached. The best-funded is Commonwealth Fusion Systems.

18startups backed
5stages
$3.5Braised between them
Series Abiggest stage

Lowercarbon Capital's whole portfolioLowercarbon Capital's profile

Series A

6

Stage not reported

5

Pre-seed and seed

3

Series C and later

2

Growth

2

Segment by segment

Series A

6 startups · $1.1B raised

  1. Pacific FusionPacific Fusion was founded in 2023 to deliver commercial fusion energy to power cities, businesses and homes.United States$900M
  2. MombakMOMBAK is a Brazilian carbon removal startup founded in 2021 by Gabriel Silva and Peter Fernandez, headquartered in São Paulo.Brazil$86M
  3. AFAcceleron FusionUnited States$39M
  4. Renaissance FusionRenaissance Fusion is a high-temperature superconductor and stellarator company.France$35M
  5. NoyaNoya, also known as Noya Labs, is a climate technology company founded in 2020 and headquartered in San Francisco, California.United States$22M
  6. SafiSustainable clothing start-up brand inspired by vintage trends with a modern twistUnited Kingdom$20M

Stage not reported

5 startups · $275M raised

  1. HHeirloomUnited States$203M
  2. Vaulted DeepVaulted Deep is a Houston-based company specializing in carbon removal and waste management.United States$67M
  3. Lumen EnergyLumen Energy focuses on helping building owners save money with clean energy.United States$3.0M
  4. SeaboundSeabound is a carbon capture technology company.United Kingdom$1.5M
  5. Running TideThe global ocean health company harnessing the power of ocean for a climate positive future.United States$250K

Pre-seed and seed

3 startups · $25M raised

  1. LunLun Energy is a Danish climate technology startup based in Copenhagen, founded in 2021 by Martin Collignon and Anders Valentin.Denmark$11M
  2. Milvus AdvancedMilvus Advanced is a UK-based deeptech company located in Oxford, specializing in the production of high-performance nanomaterials.United Kingdom$6.9M
  3. Clairity TechnologyClairity Technology is a climate-tech startup founded in 2022 and based in Los Angeles, California.United States$6.8M

Series C and later

2 startups · $228M raised

  1. Zap EnergyZap Energy is an American company founded in 2017, headquartered in Everett, Washington, with research facilities in Mukilteo and Seattle.United States$130M
  2. SolarSquareSolarSquare is a Mumbai-based residential solar company founded in 2015.India$98M

Growth

2 startups · $1.9B raised

  1. CFCommonwealth Fusion SystemsUnited States$1.9B
  2. UndoUndo is the time travel debugging company for Linux.United Kingdom$57M

How this map is made. Every startup here works in Cleantech and has raised money in a round we track that names Lowercarbon Capital as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026.

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