Wikipedia
Youmail
YouMail is an Irvine, CA-based developer of visual voicemail and Robocall blocking software. Their voicemail software replaces the voicemail service offered by mobile phone manufacturers, and offers webmail-like voicemail access and voicemail-to-text transcriptions. The company also compiles a National Robocall index by monitoring automated call patterns and behaviors, and verifying that activity against numbers that its customers manually block or report as spam.