The best replacement for logging in is logging on.

The best alternatives to logging in are rated as following:
★★★★★  logging on
★★★★  login in

Your alternative for logging in is not listed? Suggest!
Speaking about logging in, one probably shouldn't forget about facebook.

Other search terms related to logging in and their ratings are:
★★★★★ facebook
★★★ linkedin
★★ facebook account
★ facebook api
You have in mind a companion for logging in and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of logging in in all years. Click on graph for more.
logging in
logging on
login in