Would you please let me know a better audio streaming server?
Is there a comparison of audio streaming servers?

The audio comes from an FM radio station on air.

The main aim is to send the radio program to the streaming server in order to relay them to the multiple listeners.
It will save the bandwidth between listeners and radio station.
The new radio listening point is between listeners and streaming server (multiple connections).
And the FM station will continue sending/uploading (single connection) to the streaming server only; not to the listeners directly.

How is it priced?
What encoders should be there?
How can I bring up this solution?
Any other better ways?

I welcome your suggestions.