| Pathway | Ocean CDR |
|---|---|
| Secondary pathways | Enhanced Weathering |
| Method | Ocean Alkalinity Enhancement |
| Country | France |
| Website | https://www.pronoe.earth/ |
| pronoe-earth | |
| Status | 🟢 Active (score: 75/100) |
| 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
Pronoe is a Paris-based ocean CDR startup developing electrochemical ocean alkalinity enhancement (OAE) systems that attach to coastal industrial outflows such as desalination plants. Its process uses electricity to dissolve cheap limestone in brine, producing an alkaline stream without lime calcination or on-site CO2 storage. In January 2026 the company was selected as Frontier’s first French portfolio company, receiving part of a $3.05M prepurchase alongside Cella.
History
- 2026-11-02 — news mention: Pronoe: ### BREAKING NEWS ### PRONOE is thrilled to announce the signing of a catalytic, Salesforce (source)
- 2026-10-03 — news mention: Pronoe: ### BREAKING NEWS ### PRONOE is thrilled to announce the signing of a catalytic, Salesforce (source)
- 2026-10-01 — news mention: Milkywire: 🌍 Milkywire has completed eight Salesforce-backed pre-purchases, securing 3,661 tonnes of (source)
- 2026-09-15 — refresh: coresignal, screenshot
- 2026-08-21 — news mention: Cella: Grateful to Frontier , Stripe , Shopify , and Google for continued confidence in Cella and ou (source)
- 2026-08-13 — news mention: Cella Mineral Storage: Frontier has facilitated $3.05M of carbon removal prepurchases from PRONOE (F (source)
- 2026-08-06 — news mention: Cella Mineral Storage: Grateful to Frontier , Stripe , Shopify , and Google for continued confidence (source)
- 2026-05-22 — news mention: Singapore Management University Launches South-east Asia’s First University-Anchored Fund Dedicated (source)
- 2026-05-01 — refresh: screenshot
- 2026-05-01 — refresh: coresignal, screenshot
- 2026-04-19 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟢 Active (source)
- 2026-04-19 — refresh: coresignal, screenshot
- 2026-04-19 — reclassified: pathway=Ocean CDR focus=supplier liveliness=🟢 Active (source)
- 2026-04-19 — 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.