Use cents/kWh and $/therm along with fixed fees to compare.
New York Energy Explainers
ESCO supply vs utility delivery
ESCOs provide supply; utilities (Con Edison, National Grid, etc.) handle delivery and reliability. Delivery charges appear regardless of ESCO choice.
Plan terms and guarantees
Some ESCOs advertise introductory rates or guarantees. Review plan documents for monthly fees, ETFs, or seasonal adjustments before enrolling.