Are there analogues of voximplant?

Question

Telephony

There was a question about the implementation of a call center in our own CRM with the ability to record conversations. The operator must call by pressing a button on the client's mobile phone and receive calls from clients by SIP number (forwarding from a regular number).
We are looking at the voximplant option - but it turns out to be very expensive, as I understand it. Correct me if I'm wrong:
2 operators, 30 new clients per day. So I pay per minute for a SIP number, 30 numbers daily (~$4.5 per number) and per minute for a conversation?
Can anyone suggest another solution and where to start? We understand how to set up an asterisk, but we don’t understand how the web application is connected as a whole.

Answer 1

This was the simplest integration between Asterisk and a self-written Service Desk in our organization:
When clicking on a phone number in the browser, the WEB application contacted Asterisk via the AMI and executed the Originate command. And what is there to pay for?

Answer 2

So I pay per minute for a SIP number, 30 numbers daily (~$4.5 per number) and per minute for a conversation?

It is not clear where such mathematics came from, write your script to support, they will tell you how much it will cost. or look at voximplant.ru, pricing may be clearer there