No, but plenty of businesses that process your call data, whether it's for call recording, transcription, IVRs, speech analytics, CRM integration, call queuing, auto dialing, or SMS/chat features, are liable to be running stuff like FreeSWITCH, Asterisk, or similar somewhere in their stack.

Any business with a PBX that wants to do more than just basic call routing and PSTN connectivity is likely using third party tools. And a significant number of those tools are built on FreeSWITCH, Asterisk, or similar.