I search for a replacement every year. I have never found a near competitor. Vonage used to have a desktop app that was at least in the ballpark, but they dropped support years ago.

Feature set: Voicemail integration with carrier

Voicemail to Text with notifications

Voicemail specific to groups

Desktop app/Browser plugin

Web message interface

Mobile App

Long distance

International voice and text

MMS

Group

Forwarding