Account Kit provides phone number and email login with no additional passwords to remember. Facebook Login gives people two-tap account creation using their existing Facebook accounts. And they're even better together - use both to grow your customer base.
Account Kit will not institute any SMS charges through August 2018, at which point standard SMS rates may apply for apps exceeding 100K SMS confirmation messages per month. For FbStart apps, our program for early-stage mobile startups, we will not institute any Account Kit SMS charges indefinitely.