Estuaire

Estuaire is a Paris-based startup. It was co-founded by brothers Maxime and Nicolas Meijers. The company sells climate data for aviation. The site says it helps the aviation industry track CO2, NOx, contrails and the climate impact of aircraft over their lifecycle.

The data platform analyses commercial and business flight paths. The site says this covers around 40 million flights a year and more than 90,000 commercial and business aircraft. It combines flight data with weather, aircraft and payload data. The site also claims it tracks more than 99.8 percent of commercial flights.

The site lists several use cases. These include monitoring non-CO2 effects, preparing for a non-CO2 measurement regulation, and optimising flight paths to save fuel and reduce contrails. Other uses include scope 3 emissions for airport carbon accreditation and incentive schemes that help airlines buy sustainable aviation fuel.

The company sells to airlines, airports, aviation finance firms and aircraft manufacturers. The site lists publications such as an aircraft lessor sustainability index for 2026, a sustainable aviation fuel dataset and a contrail opportunity index. The site says the platform is developed and hosted in Europe, and that it meets GDPR and AI Act rules.

The site includes short quotes from partners. One quote says the data helped show the operational efficiency of an ATR 72-600 aircraft. Another says the data supports incentives that help operators reduce emissions.

The site has a demo request form, a newsletter sign-up and a page for job openings. It links to LinkedIn, Instagram and X.