Typically, most of these services are uniform—i.e. include the same tools and features (send a script, they record it in a tone you approve, they send it as a file, you supply any feedback, etc.); however, there are some services that go above and beyond. For example, VoiceOverPro, is a single voice professional who records 30 second voicemail messages based on users’ scripts. This is standard; however, users also have options like adding music, recording up to 60 seconds (or 150 words), rush, 2-day turnaround, and even same day delivery.
Adam Boalt, CEO of LiveAnswer, a provider of phone support services for small and midsized businesses, puts the voicemail abandonment rate at between 50 percent and 75 percent, depending on the type of business.

Uploading an Audio file Select By Uploading an Audio file. Give the file a name. Optional: Leave a note for yourself to tell what the file is for. Click the musical note and browse your computer to find the correct audio file, or drag and drop an audio file onto the screen. Click Save. Click Select on the audio file you would like to use. Click Save to update the changes.
A good first impression goes a long way, and a voicemail greeting is the first impression to your business. An expertly crafted voicemail script lets your clients know you’re dependable, capable, and confident. An unprofessional voicemail script, on the other hand, can do the exact opposite.