| Pathway | Ocean CDR |
|---|---|
| Secondary pathways | Biomass Burial |
| Method | Marine CDR (Other) |
| Country | United States |
| Website | https://www.phykos.co/ |
| phykos-pbc | |
| Status | 🔴 Likely Dead (score: 15/100) |
| Company size | Micro (under 10) (EU SME size class, derived from the LinkedIn size band; exact headcounts are not published) |
| CDR Focus | supplier |
About
Phykos, PBC is an Oakland, California ocean CDR startup founded in 2020 by ex-Google X engineers Jeff Zerger and Nico Julian and backed by Y Combinator (S21). The company builds mobile autonomous vessels that cultivate fast-growing seaweed on the open sea and deposit the biomass in the deep ocean to sequester carbon for ~1,000 years, selling the resulting credits. Funding and team are very small, and the company’s public website and communications have not been meaningfully updated since 2023.
History
- 2026-10-15 — refresh: coresignal
- 2026-09-15 — refresh: screenshot
- 2026-05-01 — refresh: screenshot
- 2026-05-01 — refresh: screenshot, liveliness
- 2026-05-01 — liveliness: 🟠 Suspect → 🔴 Likely Dead (source)
- 2026-04-19 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟠 Suspect (source)
- 2026-04-19 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟠 Suspect (source)
- 2026-04-19 — refresh: screenshot, liveliness
- 2026-04-19 — liveliness: 🟠 Suspect → 🔴 Likely Dead (source)
- 2026-04-19 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟠 Suspect (source)
- 2026-04-18 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟠 Suspect (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.