Available Carbon Accounting Features
Missing Carbon Accounting Features
Pricing
Starting Price
Options
Available Since
Deployment Options
Good Option For
- Small Business (11-50 people)
- Medium Business (51-250 people)
- Large Business (250+ people)
Deep dive
Core Features
EmeraldSky provides a standardized, independently assured basis for measuring and comparing aircraft and flight emissions, coupling transparent methodology with governance signals valued by auditors, financiers and regulators. Its main capabilities include:
Seat & cabin allocation. Calculates passenger CO₂ at seat and cabin level using seat pitch/width and passenger-vs-cargo allocation; measures from aircraft, flight, seat or cargo.
Aircraft-specific modeling. Incorporates aircraft/engine master series, winglets, age, load factor, cargo weight, taxi-in/out and actual airtime—not just great-circle distance.
Historic + forecast coverage. Provides historical emissions (from 2017) and a rolling 12-month forecast updated with schedule changes.
Independent verification & assurance. Methodology audited by EY, accredited by Rocky Mountain Institute (RMI) under the Pegasus Guidelines, and awarded ISAE 3000 Reasonable Assurance by PwC.
APIs & booking integration. Emissions API can surface predicted, seat-specific estimates at the time of booking and integrate with other Cirium data services.
Portfolio & airport use cases. Supports aviation finance benchmarking and airport reporting/incentive design alongside airline and corporate-travel programs.
Closing Insights
EmeraldSky offers tailored emissions solutions across aviation stakeholders. Corporate travel programs can present seat- and cabin-level emissions estimates via the Cirium Sky Emissions API at the point of booking—letting travelers and procurement teams choose lower-carbon options without compromising itinerary quality. Aviation finance teams can benchmark fleet or leased-aircraft emissions intensity in line with the Rocky Mountain Institute’s Pegasus Guidelines, benefiting from Cirium’s accreditation as a qualified data provider.
Since its launch in May 2024, the EmeraldSky methodology has been audited by EY, accredited by RMI, and awarded ISAE 3000 Reasonable Assurance by PwC. Cirium publishes a monthly Flight Emissions Digest and delivers a Flight Emissions Review that surfaces benchmark rankings and trends over time, helping users track progress and compare performance.
For teams responsible for emissions disclosure and reduction strategies, EmeraldSky’s strengths lie in its granular modeling, forecast capability, and independent verification. These combine to reduce uncertainty, accelerate decision-making across airlines, travel programs, airports and financiers, and support stronger governance. Cirium also provides consultancy services to assist deployment, data integration, and ongoing assurance.