What chat, screen share, voice call tools do companies use to communicate with customers?

I have been trying out different tools but can't seem to find one that suits all my needs.
Basil AbbasFounder and CTO, https://clockit.io · Asked
1
UberConference

Stress-free conference calls

Nichole Elizabeth DeMeré3Moderator at Product Hunt · Written
Simple, visual, and free to use, you can easily set up and join free conference calls without PINS.
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