While you may not recognize these company names, you have received SMS from them as they provide communication services to many large companies like banks and Uber.
Yes both solutions are capable of sending SMS and voice. There is a cost with both but it’s not that expensive. I have links to their pricing in these threads.
IFTTT likely uses Twilio or Plivo as the backend. I prefer a direct integration vs having another point of failure (IFTTT).
