What Estuaire does

Estuaire is a Paris-based climate-tech company founded in 2022 that operates an aviation environmental data platform analyzing approximately 40 million commercial and business aviation flight trajectories per year. The platform integrates weather data, aircraft specifications, engine type, and payload information to model flight-specific environmental impacts across CO2, contrails, NOx, and aircraft lifecycle effects, and has covered over 99.8% of commercial flights and more than 90,000 aircraft. Its most-cited analytical finding is that roughly 2.9% of flights generate approximately 80% of contrail warming, derived from analysis of 34.4 million 2023 commercial flights, enabling targeted rerouting with minimal fuel penalty.

The product portfolio comprises three pillars: a core Data Platform with filters by date, aircraft, operator, airport, engine, and owner; a Contrail Mitigation module for identifying and addressing high-impact flights; and APIs for programmatic integration. These are supplemented by three published research indices — the Contrail Opportunity Index, the Airline Sustainability Index, and the Aircraft Lessor Sustainability Index — that serve as benchmarking assets for the aviation finance community. The platform is GDPR and EU AI Act compliant and hosted in Europe.

Estuaire monetizes primarily through subscription-based SaaS access to the Data Platform and APIs under a quote-based enterprise sales motion, with a secondary methodology licensing stream evidenced by the March 2026 partnership with Advito to enhance the GATE4 emissions methodology. Customers span four primary segments — Airlines (Air France, Vueling, Royal Air Maroc), Airports (Vinci Airports, Aéroports de Montréal), Aviation Finance (Société Générale), and Aircraft Manufacturers (ATR, Safran) — alongside aircraft lessors such as RIVE. The company raised €2.2 million in seed funding in June 2024 from a consortium led by Satgana with Safran Corporate Venture, XAnge, AFI Ventures, the European Space Agency, Bpifrance, and others.

Name

Estuaire

Legal name

Estuaire

Website

https://estuaire.dev

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

1–10 employees

Short description

Estuaire is a Paris-based climate-tech firm operating an aviation environmental data platform that analyzes ~40 million flight trajectories per year for CO2, contrail, and NOx impact, serving airlines, airports, aircraft lessors, manufacturers, and aviation finance firms.

Ownership category

akta.pro rank

Product category

Aviation Climate Data Analytics

NAICS

Other Support Activities for Air Transportation (488190)

akta.pro primary industry

Sustainable Aviation Fuel (SAF) & Alternative Fuels (e-fuels, biofuels, hydrogen) (THABANAA)

Keywords

• Aviation emissions data
• Climate data platform
• Contrail mitigation analytics
• Flight trajectory analysis
• Sustainability benchmarking

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Infrastructure, Marketing or Sales, Operations

Revenue model

1. Climate Data Platform Subscription: SaaS platform providing access to environmental data for aviation stakeholders including CO2, contrails, NOx, and aircraft lifecycle impact data. Delivered via web platform with data organized by preferences (date, aircraft, operator, airport, engine, owner).
2. API Access: Programmatic access to flight environmental data and contrail mitigation services via APIs for integration into customer systems.
3. Methodology Consulting: Partnership with Advito to enhance GATE4 emissions methodology, suggesting professional services or licensing of proprietary methodologies.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Estuaire operates a B2B climate data SaaS platform for the aviation industry that ingests approximately 40 million commercial and business aviation flight trajectories per year, integrates them with weather, aircraft, and payload data, and delivers environmental footprint insights covering CO2, contrails, NOx, and aircraft lifecycle impacts. The platform is offered through a web interface, via APIs for programmatic access, and through three benchmarking indices (Contrail Opportunity Index, Airline Sustainability Index, Aircraft Lessor Sustainability Index). Its core insight is that roughly 2.9% of flights generate approximately 80% of contrail warming, enabling targeted interventions.

Product overview

Estuaire offers a climate data platform for aviation, architected as a unified Data Platform with specialized modules and sub-branded research publications. The core Data Platform analyzes approximately 40 million commercial and business aviation flight trajectories per year, integrated with weather, aircraft, and payload data, to deliver CO₂, contrails, NOx, and aircraft lifecycle impact insights. The Contrail Mitigation module enables airlines and airports to identify and address high-impact contrail-forming flights. The APIs product provides programmatic data access for developers and enterprise integrators. Supporting the platform are three published indices — the Contrail Opportunity Index, the Airline Sustainability Index, and the Aircraft Lessor Sustainability Index — which deliver pre-built benchmarking and research outputs to the aviation finance, airline, airport, and aircraft manufacturing industries.

Differentiator

Problem solved

Functional benefit

Products and services

• Data Platform Core SaaS analytics platform for aviation stakeholders that ingests commercial and business aviation flight trajectories (~40M per year), integrates weather, aircraft, and payload data, and delivers environmental footprint insights including CO2, contrails, NOx, and aircraft lifecycle impact data, organized by date, aircraft, operator, airport, engine, and owner.
• Contrail Mitigation Module focused on identifying and reducing contrail-forming flights, enabling airlines and airports to reroute or adjust high-impact flights responsible for the majority of aviation's contrail warming effect.
• APIs Developer-facing application programming interfaces providing programmatic access to Estuaire's aviation climate data, including flight trajectory data, emissions metrics (CO2, contrails, NOx), and aircraft lifecycle impact data, enabling organizations to embed emissions intelligence into their own systems and workflows.

Quantifiable outcome

• 2.9% of flights generate approximately 80% of contrail warming effect, enabling airlines to achieve substantial climate impact reductions with minimal fuel penalties by rerouting or adjusting a small number of high-impact flights
• +2 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• AdvitocoreStrategic or Co-development Partner · 24 March 2026Advito partnered with Estuaire to enhance its GATE4 emissions methodology for aviation. The enhanced methodology incorporates flight-specific non-CO2 data to better quantify aviation's climate impact, combining Advito's consulting expertise with Estuaire's environmental data capabilities.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Sustained: Swiss-based aviation sustainability data platform providing flight-level climate accounting for airlines and corporate travel programs. Directly comparable in product scope (flight-level CO2 and non-CO2 data) and customer segments (airlines, aviation finance, corporates).
• Chooose: Climate API platform that provides aviation-specific emissions data, SAF integration, and carbon offsetting infrastructure. Overlaps with Estuaire's API product and aviation customer base, and competes for similar sustainability/aviation finance buyers.
• Atmosfair: German non-profit offering aviation-specific emissions calculators, carbon offsetting, and corporate travel sustainability tools. Comparable in aviation vertical focus and corporate/finance buyer overlap, though more offset-driven than data-driven.
• Myclimate: Swiss climate foundation providing aviation emissions calculators, flight-specific CO2 data, and sustainability reporting tools for airlines and corporates. Direct competitor in flight-level aviation emissions intelligence for the European market.
• SkyNRG: SAF-focused marketplace and program operator for airlines and corporate buyers. Comparable aviation buyer overlap and complementary sustainability narrative, though commercial model centers on fuel procurement rather than data.

Broad incumbents

• South Pole Group: Large global climate solutions provider with aviation-specific offerings (SAF procurement, voluntary carbon, corporate sustainability advisory). Comparable customer overlap with aviation finance and corporate buyers, though much broader portfolio.

Emerging players

• Watershed: Enterprise climate platform providing emissions accounting, MRV, and reporting for large corporates. Overlaps with Estuaire's aviation finance customers seeking CSRD-ready disclosures, but serves multiple industries rather than specializing in aviation.
• Persefoni: Climate management and accounting platform for enterprises and financial institutions, including financed emissions for aviation portfolios. Competes for the aviation finance buyer with broader scope but less aviation-specific depth.
• Greenly: Carbon accounting SaaS for SMBs and mid-market with growing enterprise offerings. Adjacent competitor in CSRD/Scope 3 reporting that may serve overlapping aviation-adjacent buyers, though not aviation-specialized.

Others

• Capterra (climate/ESG data vendors): Listed as an 'others' adjacency — Capterra catalogs a broad set of ESG and sustainability platforms that compete for the same procurement budgets in aviation finance and corporate sustainability teams. Use as a directional reference for the broader competitive set rather than a true peer.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds2 records

Investors4 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Estuaire