Google offers a one-year deprecation policy for a bunch of services, including AppEngine: https://developers.googleblog.com/2012/04/changes-to-deprecation-polic

Google offers a one-year deprecation policy for a bunch of services, including AppEngine: https://developers.googleblog.com/2012/04/changes-to-deprecation-policies-and-api.html https://developers.googleblog.com/2012/04/changes-to-depreca.... One year is not enough for many enterprise customers. On top of this, there is the not-so-distant issue with the sudden price hike of Google Maps API, which made many companies struggle (in this case especially small ones).