AI Voice API at
1/10th the cost

High-quality text-to-speech powered by open-source models. Starting at $0.005 per 1,000 characters — 10-20x cheaper than ElevenLabs or OpenAI.

Start Free — $0.50 Credit View API Docs

Two Models, One API

Standard

Kokoro 82M

Fast, lightweight TTS. 54+ voices, 10 languages.

$0.005/1K chars

~200ms latency
English, Spanish, French, Japanese + more
Apache 2.0 licensed

Pro

Chatterbox 350M

Expressive, emotional TTS. Voice cloning, paralinguistic tags.

$0.01/1K chars

~500ms latency
23 languages, voice cloning
[laugh], [sigh] emotion tags

How We Compare

Same quality, fraction of the price.

Provider	Price / 1K chars	Voice Cloning	Open Source
Leanvox Standard	$0.005	—	Yes
Leanvox Pro	$0.01	Yes	Yes
ElevenLabs	$0.06 – $0.30	Paid plans	No
OpenAI TTS	$0.015 – $0.03	No	No
Google Cloud TTS	$0.004 – $0.016	No	No

Simple Credit Pricing

No subscriptions. Buy credits, use them anytime.

~1M chars (Standard)

$20

+10% bonus

~4.4M chars (Standard)

$50

+15% bonus

~11.5M chars (Standard)

$100

+20% bonus

~24M chars (Standard)

Quick Start

curl -X POST https://api.leanvox.com/v1/tts/generate \
  -H "Authorization: Bearer lv_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Hello world!",
    "model": "standard",
    "voice": "af_heart",
    "language": "en"
  }'