If you want autocomplete from the start of the word/phrase you can do that with the datastore alone and a basic string query.
If you want it from mid phrase, neither datastore or search API are particularly great at this (you need to store all fragments yourself) Algolia will have you up and running in no time, and it's crazy fast -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/2fd34a0d-e4d7-4167-af7b-b9e0c980eec8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.