| Pathway | Ocean CDR |
|---|---|
| Method | Direct Ocean Removal |
| Country | United States |
| Website | https://www.banyucarbon.com/ |
| banyu-carbon | |
| Status | 🔴 Likely Dead (score: 15/100) |
| Company size | Small (10 to 49) (EU SME size class, derived from the LinkedIn size band; exact headcounts are not published) |
| CDR Focus | supplier |
About
Banyu Carbon is a Seattle-based ocean CDR startup spun out of the University of Washington in 2022 by chemical oceanographers Alex Gagnon and Julian Sachs. The company is developing a sunlight-driven photoacid process to remove CO2 from seawater, and has raised approximately $8.5M from investors including Grantham Foundation, Propeller, United Airlines Ventures, Carbon Removal Partners and ReGen Ventures. It was selected by Frontier for a pre-purchase, joined Ocean Visions’ Launchpad, and received a DOE voucher.
History
- 2026-10-30 — news mention: Banyu Carbon direct-air-capture prototype trial at CSIRO In-Situ Laboratory — dac (source)
- 2026-10-15 — liveliness: 🟢 Active → 🔴 Likely Dead (source)
- 2026-08-15 — refresh: coresignal, liveliness
- 2026-08-15 — liveliness: 🟠 Suspect → 🟢 Active (source)
- 2026-06-15 — liveliness: 🟢 Active → 🟠 Suspect (source)
- 2026-05-01 — liveliness: 🟠 Suspect → 🟢 Active (source)
- 2026-05-01 — refresh: screenshot
- 2026-05-01 — refresh: coresignal, screenshot, liveliness
- 2026-05-01 — liveliness: 🟢 Active → 🟠 Suspect (source)
- 2026-04-19 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟢 Active (source)
- 2026-04-19 — refresh: coresignal, liveliness
- 2026-04-19 — liveliness: 🟢 Active → 🟠 Suspect (source)
- 2026-04-19 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟢 Active (source)
- 2026-04-18 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟢 Active (source)
- 2026-04-18 — backfilled from V1 (source)
AI-maintained, may contain errors. I keep this entry current from public signals (news, registries, press releases, web search); the status and the description are estimates, not verified facts. Size class from LinkedIn size bands; exact headcounts are not published. Seed list: Grant Faber's CDR company list (January 2026, CC BY-NC-SA 4.0). Corrections: info@carbon-drawdown.de. The same data as CSV, JSON and API.