NVIDIA Nemotron 3 Super - blazing-fast agentic AI, ready to deploy today!
inworld-ai/
$5.00
/ 1M characters
Fast multilingual text-to-speech model by Inworld AI with 130+ preset voices across 15 languages. Supports voice cloning, word-level timestamps, and streaming. Optimized for low-latency applications with <130ms time-to-first-audio.

DeepInfra supports custom voices.
The following creates a voice using the curl command.
curl -X POST "https://api.deepinfra.com/v1/voices/add" \
-H "Content-Type: multipart/form-data" \
-H "Authorization: Bearer $DEEPINFRA_TOKEN" \
-F "audio=@hello.wav" \
-F "name=John Doe" \
-F "description=John Doe's voice"
which will return something similar to
{
"user_id": "gh:10000000",
"voice_id": "abcd1234abcd1234abcd",
"name": "John Doe",
"description": "John Doe's voice",
"created_at": 1723851387,
"updated_at": 1723851387
}
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