[halbritt]

Ecobee is the only real mass-market competition to Nest. Depending on the specific HVAC equipment one may have, there are other "smart" alternatives from the manufacturers themselves.

Generally speaking, they all offer a portal and an app in which one can adjust the HVAC settings. Also, generally speaking, these apps and portals are being developed by companies for which software engineering is not a primary function, so they're about as good as you would expect.