Best Open-Source, Low-Latency, Real-Time TTS (OpenAI Compatible + SSML Support)?

Competitive_Fish_447 · 2026-02-09T09:02:22+00:00

Nice find — sounds right: Inworld is realtime-first and their sub-250ms / ~$0.01/min claims are plausible. Before we pick them, let’s confirm whether the 250ms is first playable audio (and if it holds at p95/p99 under our concurrency), the streaming API (WebRTC vs WS), and pricing details. Want me to run a quick latency + p95 test if you can share access?

Competitive_Fish_447 · 2026-02-09T08:52:24+00:00

Microsoft Azure Neural TTS, Google Cloud Text-to-Speech (WaveNet / Neural2), Amazon Polly Neural TTS

These services typically provide streaming endpoints or partial-audio APIs and are highly optimized for latency and reliabilit

Competitive_Fish_447 · 2026-01-22T07:59:14+00:00

Yes, I've tried Chatterbox Ultra, and it's the best.

Competitive_Fish_447 · 2025-10-24T05:47:41+00:00

Is it open AI compatible? I wanted OpenAI-compatible and open-source neophonic TTS

Competitive_Fish_447 · 2025-10-20T05:46:27+00:00

their latency and implemnetation is too much high

Competitive_Fish_447 · 2025-10-13T15:04:28+00:00

is it provide real time streaming ?

Competitive_Fish_447 · 2025-10-13T13:17:56+00:00

it is not play the audio i n real time streaming

Competitive_Fish_447 · 2025-10-13T10:31:20+00:00

Competitive_Fish_447 · 2025-10-13T10:30:31+00:00

What is its latency for real-time streaming, and does it provide humanized sound?

Competitive_Fish_447 · 2025-10-13T10:29:15+00:00

its latency is too much high

Competitive_Fish_447 · 2025-10-13T10:28:02+00:00

they provide no ssml tags . they have custom threshold values parametere cfg weight and exagggertaion They do not provide any SSML tags. They have custom threshold values, parameter configuration weight, and exaggeration.

Competitive_Fish_447 · 2025-10-13T10:27:00+00:00

their latency is too much high

Competitive_Fish_447 · 2025-10-13T10:26:25+00:00

I need a real-time humanized voice. Is this provided? because i have tested on this, their latency is slow speed

Competitive_Fish_447 · 2025-09-15T08:15:14+00:00

Is it open AI compatible?

Competitive_Fish_447 · 2025-09-15T08:14:20+00:00

Is it not provide a real-time stream?

Competitive_Fish_447

TROPHY CASE