Which TTS API do you use for phone-based voice agents ?
Specifically for phone calls (not web). Curious what people are running and whether latency on actual PSTN calls matched what you saw in testing.
We're currently evaluating and the shortlist is ElevenLabs Turbo, Cartesia, and a couple of smaller ones I've seen mentioned like Gradium. Haven't tested all of them yet, anyone have real experience with any of these specifically on phone calls?