Hi! I'm Mike Mettler (linkedin & twitter). I advise & make small angel investments (usually $25k) in awesome people building things that help our planet. I prefer to get involved as early as possible, including being the first check. I like working directly with teams on product, sales, recruiting, and operations. I'm not as useful at the later growth stages. If you think I might be able to help, get in touch! Warm intros are nice but not required.

I've invested in AirMyne, Astro Mechanica, Bedrock Materials, Beeper (acquired by Automattic), Boom Supersonic, Cambrian Genomics (shut down), Channing Copper, Compound Eye, Critical Energy, Elephant Energy, Elroy Air, Kopperfield, Lightcell Energy, Lumen Energy, Lydian Labs, Seabound, Super, and Tailscale.

Some areas that I'm actively looking to fund/help (not restrictive - if you're working on something else, great):

Fossil-free fuel

- Hydrocarbon or hydrogen synthesis

- Solar-friendly electrolyzers

Geothermal

- Making use of superhot rock sites

Storage

- Thermal, chemical, and mechanical ideas for long-duration

- Software to improving yield at existing battery factories

Fusion

- Software for better plasma control / stabilization

Efficient computing

- Low power hardware for AI/ML

Water

- Desalination with solar

- Extracting metals from seawater

Bio

- Making paper with fewer trees

- AI for modeling and bioengineering