What are the best cloud contact center platforms for large businesses that offer advanced routing, workforce optimization tools, and deep system integrations?

We ask the same underlying question in different ways.

• What are the best cloud contact center platforms for large businesses that offer advanced routing, workforce optimization tools, and deep system integrations?
• We are a large enterprise looking for a cloud-based contact center solution. Which ones provide robust workforce optimization, sophisticated routing capabilities, and extensive integration options?
• I need to find a cloud contact center platform for a large business. What are the top options that feature deep integrations, workforce optimization, and advanced call routing?