Estuaire
Estuaire, a Paris climate start-up founded in 2020, calculates the full climate impact of individual flights, including contrails and other non-CO2 effects.
With up to ten staff and backing from Bpifrance's Deep Tech programme, it builds the E-Engine platform, which combines weather-prediction data, observations and machine learning to score each flight's impact in near real time. Airlines can use it to find high-impact routes and report on non-CO2 effects. It is a qualified data provider under the Pegasus Guidelines; no customers are named.
No verified deployments yet
Estuaire is profiled in the companies register, but no deployment has been verified against published evidence. Records are added as evidence is reviewed and graded.
Products & Solutions
1 productE-Engine platform
A climate impact computation platform that fuses Numerical Weather Prediction (NWP) data, meteorological observation feeds and machine learning models to compute per-flight climate impact scores in near real time.
Airlines and finance providers lack trajectory-level CO₂ and non-CO₂ climate impact data needed for sustainability reporting and climate-aligned finance disclosure. Conventional carbon accounting captures only direct CO₂ emissions, missing the contrail and radiative forcing effects that account for roughly two-thirds of aviation's total climate warming impact. E-Engine computes per-flight climate impact scores by fusing flight-track data, Numerical Weather Prediction feeds, and climate physics models, giving airlines the granular, audit-ready data required by emerging non-CO₂ disclosure frameworks and lenders seeking climate-aligned portfolio evidence.
- Flight-track fusion, integrates actual flown trajectories with meteorological observation feeds for precise per-flight impact scoring
- NWP integration, ingests Numerical Weather Prediction data to model atmospheric conditions at altitude for each route segment
- Passenger load factors, incorporates seat occupancy data to produce per-passenger CO₂e and non-CO₂ climate impact figures
- Climate physics modelling, applies radiative forcing algorithms covering contrail formation, persistence, and warming contribution per flight
2 more features
- Contrail forecasting, predicts contrail-forming ice-supersaturated regions along planned routes to support proactive avoidance
- Pegasus Guidelines qualified, meets the European aviation non-CO₂ data quality standard for regulatory and finance reporting
Register notes
Notes held in the Aerostack register. Aerostack has not independently verified them.
Estuaire is a Pegasus Guidelines qualified data provider, a quality standard for aviation non-CO2 climate data established by the European aviation climate research community.
Read the rest
The company has received the Bpifrance Deep Tech label and a Bourse French Tech Emergence grant, confirming its R&D-intensive climate modelling approach.
Demand for per-flight climate impact quantification is driven by EU taxonomy disclosure requirements and airline net-zero commitments that increasingly cover non-CO2 effects.
Profile data from the Aerostack companies register; deployment records from the verified register. Evidence grades: T1 first-party confirmation, T2 credible reporting. See Our approach for how records are graded.