Honeywell and Nest lead the smart thermostat vendor market in terms of strategy and execution, according to a new Leaderboard Report from Navigant Research. Honeywell maintained leadership due to its existing smart/connected thermostat products and programs and its aggressive pursuit of the higher-end smart thermostat segment. Nest has gained market share by seeking out collaborations with other vendors and by expanding its global marketing initiatives.The report examines the strategy and execution of 12 smart thermostat manufacturers and software providers that are active in the global smart thermostat market and rates them on 12 criteria. Schneider, EnergyHub, ecobee, Comverge, Emerson and EcoFactor landed in the Contenders category due to relatively strong product strategy, program success and distribution. The four companies in the Challengers category — Carrier, Energate, tado and RTA — have some weaknesses in terms of either strategy or execution, but with the right steps, could move into contender or leader positions.