Text to Speech Agents Music Speech to Text Voice Cloning Voice Design Marketplace More

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Text-to-Speech Cost

Estimated Credits 20
Estimated Cost $0.36 (Starter plan)

Transcription Cost

Estimated Credits 60
Estimated Cost $1.08 (Starter plan)

Plan Pricing

PlanCreditsPer Credit
Free15-
$5 Pack100$0.050
$15 Pack400$0.038
$40 Pack1,200$0.033
Starter $9/mo500$0.018
Pro $29/mo2,000$0.015
Business $99/mo10,000$0.010
Scale $249/mo30,000$0.008
Enterprise $4,999/mo1,000,000$0.005
Annual billing saves 20%

Credit Costs

  • Free Models: 0 credits
  • Standard Models: 2 credits / 1K chars
  • Premium Models: 4 credits / 1K chars
  • Transcription: 1 credit / minute
  • Voice Cloning: Free (uses model credits)

Frequently Asked Questions

TTS.ai uses a credit-based system. Each model tier has a different credit cost per generation: Free models (Kokoro, Piper, VITS, MeloTTS) cost 0 credits, Standard models cost 2 credits per 1000 characters, and Premium models cost 4 credits per 1000 characters. You get 15 free credits on signup.

It depends on the model and speaking speed. On average, 1 hour of audio equals roughly 9,000 words or 54,000 characters. With a Standard model (2 credits per 1000 chars), that is about 108 credits. With Free models like Kokoro, it costs zero credits.

Use our free-tier models: Kokoro, Piper, VITS, or MeloTTS. These cost zero credits and produce high-quality speech. Kokoro in particular delivers near-premium quality at no cost. Free models have no daily limit for logged-in users.

Voice cloning itself is free — you upload a reference audio clip and clone the voice. The cost comes when you generate speech with the cloned voice, which follows the standard credit pricing for the model used (e.g., 2 credits per 1000 chars for Chatterbox).

Speech-to-text transcription costs 1 credit per minute of audio. For a 60-minute recording, that is 60 credits. The Starter plan ($9/month, 500 credits) covers about 8 hours of transcription.

Yes. Higher-tier plans offer better per-credit pricing. The Starter plan is $0.018 per credit, while the Enterprise plan is $0.005 per credit — a 72% savings. Annual billing adds another 20% discount.

Credits from one-time credit packs do not expire. Subscription credits refresh monthly — unused subscription credits do not carry over to the next billing cycle.

Yes. All new accounts receive 15 free credits. Additionally, four models (Kokoro, Piper, VITS, MeloTTS) are permanently free and cost zero credits, with no daily generation limit for logged-in users.

Multiply the total character count across all texts by the per-1000-char credit cost of your chosen model. For example, 100 texts averaging 500 characters with a Standard model: 100 x 500/1000 x 2 = 100 credits.

We accept Stripe (all major credit/debit cards), PayPal, Square, and Coinbase (cryptocurrency). You can purchase one-time credit packs or subscribe to a monthly/annual plan.

Yes. Auto top-up lets you set a credit threshold — when your balance drops below it, a credit pack is automatically purchased. You control which pack and when it triggers. There is no way to accidentally overspend.

This page serves as both the web and API cost calculator. API pricing uses the same credit system as the web interface. The OpenAI-compatible endpoint at /v1/audio/speech uses the same per-model credit costs.
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