Choose whichever platform you use for reading/sending your work emails. Related: Signing up with RiffleCM in 5 minutes or lessRelated ArticlesSigning up with RiffleCM in 5 minutes or lessHow do I add my team to Riffle?My company receives ITBs to an email address that’s different from my own—how do I sign up?Signing up with Google—step-by-stepSigning up with Outlook—what to do when Microsoft asks for admin access