Ask HN: Any Alternatives to Twilio/Plivo?

I am currently using Twilio for my service that needs voice calls (outgoing and incoming).

It works well but the costs are quite high and I am looing at an alternate service that can provide programmatic Voice API.

I tried to reach Plivo but it looks like they are either dead or not taking any new clients. I wasn't able to get any response from Plivo.

What are you using other than Twilio for programmatic Voice API?

Any recommendations/suggestions for programmatic Voice API other than Twilio/Plivo?

Thanks in advance.