At One Ventures
At One Ventures is a Pre-Seed, Seed venture capital firm based in Los Altos, CA investing in Climate / Energy, Other. The firm typically writes $250K–$3.0M checks and has 2 portfolio companies in our records.
- Check size
- $250K–$3.0M
- Portfolio
- 2 companies on record
- Partners
- 9 listed
- AUM
- $525M
- Stage
- Pre-Seed, Seed
- Sectors
- Climate / Energy, Other
- HQ
- Los Altos, CA
Last verified: 2026-07-07
Pre-Seed, Seed
$250K – $3.0M
$525M
2+ companies
9 partners
Investment Thesis
Invests in early-stage companies using technology to improve environmental outcomes, including the circular economy, waste management, and carbon mitigation.
How At One Ventures invests
At One Ventures is a vc firm based in Los Altos, CA. The firm invests at the Pre-Seed, Seed stages, with a focus on Climate / Energy, Other. It does not invest in Entertainment, E-commerce.
At One Ventures typically writes checks of $250K–$3.0M per investment, backed by approximately $525M in assets under management.
At One Ventures has backed 2 companies in our records, including Cruz Foam, Mangrove Water Technologies.
Partners & Team
Brian Steinberg
Partner
Industry Focus
Invests In
Does Not Invest In
Portfolio Companies (2)
Other
Cruz Foam
Mangrove Water Technologies
- •Raising at Pre-Seed, Seed? You're squarely in their sweet spot.
- •Lead with your fit in Climate / Energy, Other — the sectors they actively back.
- •Size your ask to their typical $250K – $3.0M check.
- •warm intro preferred
- •Address your outreach to a specific partner, such as Ana Yoerg, Vice President of Marketing.
- •A warm introduction beats a cold email. Get matched and request an intro.
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