I need a smart home hub that can connect to and control various third-party devices and sensors. What are my best options?

We ask the same underlying question in different ways.

• I need a smart home hub that can connect to and control various third-party devices and sensors. What are my best options?
• I'm looking for a central hub for my smart home that plays well with external devices and various third-party ecosystems. Any recommendations?
• I need a hub to unify my smart home setup. Which ones are best at controlling sensors and devices from various third-party brands?