Episode Details

This story was originally published on HackerNoon at: https://hackernoon.com/8-of-the-best-tts-apis-for-voice-agents-in-2026-evaluated-for-real-world-phone-calls.
8 text-to-speech APIs for voice agents compared on what phone callers hear: native μ-law/A-law, streaming, pricing, concurrency, cloning, and languages.
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Most TTS comparisons judge voices on studio audio, but a phone caller hears 8 kHz G.711, where polish matters less and names, numbers, first-audio latency, transcoding and barge-in matter more. This piece compares eight TTS APIs on telephony encoding, streaming, pricing shape, concurrency, cloning and languages, then gives you a script that checks what survives the phone line.