My recommendation depends on your exact requirements. It involves the following aspects: * What's the size of your operation? * What specific purposes do you have in mind? * Could you elaborate on how you intend to use it? For example, if I have a call center with 30 people, and I primarily want to use it for call center operations. I wouldn't recommend Avaya or Cisco. I'd suggest considering either Amazon Connect or Salesforce Service Cloud (voice services). For Amazon Connect, I'd rate it a seven out of ten. There are a few features they still need to improve, particularly with Customer Profiles and case management. If these features become as robust as Salesforce, then Amazon Connect could be a complete contact center solution without the need to integrate third-party CRM tools like Salesforce.
