TTS.ai
Text to Speech
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What is TTS.ai?
TTS.ai is a comprehensive free AI voice platform that provides text-to-speech, voice cloning, speech-to-text, and 30+ audio tools powered by open-source AI models. The platform offers 33+ TTS models with 273+ voices across 33+ languages, requiring no account for basic use. It serves creators, developers, and businesses who need AI voice generation without vendor lock-in.
Key features include 20+ AI models for text-to-speech with speed control and file export, voice cloning from just 5 seconds of audio, speech-to-text with Whisper and Faster Whisper supporting 99 languages, real-time voice chat, AI agents for customer service, AI music generation, voice changing, audio enhancement, vocal removal, stem splitting, speech translation, speech-to-speech transformation, dubbing studio for 30+ languages, batch TTS via CSV upload, ebook-to-audiobook conversion, podcast generation, and an embed widget for websites. The platform has over 16,000 creators and 65,000+ generations.
The platform is ideal for content creators making audiobooks and podcasts, developers building voice applications with its OpenAI-compatible REST API, businesses needing customer service voice agents, accessibility users who need document reading, linguists working with multilingual content, and anyone wanting to clone voices or translate speech while preserving speaker identity. No credit card is required for the free tier, and commercial use is allowed.
TTS.ai pricing
Pricing model: Freemium
Free tier: $0 with 15,000 free characters + 5,000 characters/day, 5,000 chars per generation, 7 free models including Kokoro, API access included, no credit card required, commercial use OK. Starter: $9/mo for 500,000 characters/month, all 20+ models, 100,000 chars per generation, voice cloning included. Pro: $29/mo for 2,000,000 characters/month, everything in Starter plus API access and priority processing. Business: $99/mo for 10,000,000 characters/month, everything in Pro plus bulk API and priority queue. Character packs also available.
TTS.ai pros
- No account required for free tier
- 33+ open-source TTS models in one platform
- 273+ voices across 33+ languages
- 15,000 free characters plus 5,000/day
- 5,000 characters per generation on free tier
- Voice cloning from just 5 seconds of audio
- OpenAI-compatible REST API included
- Streaming support for real-time applications
- Commercial use allowed on free plan
- No vendor lock-in with open-source models
- 30+ audio tools beyond TTS
- Batch TTS via CSV upload for hundreds of texts
- Embed widget adds TTS to any website with one line
- Multiple model speed tiers (Fast/Standard/Premium)
- Voice cloning available on Starter plan and above
TTS.ai cons
- Free tier limited to 7 models only
- 5,000 character limit per generation on free plan
- Voice cloning requires paid Starter plan ($9/mo)
- Some premium models need 8GB VRAM
- Bark model is slow with 5GB VRAM requirement
- GPT-SoVITS requires 6GB VRAM and is slow
- Tortoise TTS needs 8GB VRAM and is slow
- Some models are English-only limiting multilingual use
Frequently asked questions about TTS.ai
Do I need to create an account to use TTS.ai?
No account is required for the free tier. You can use text-to-speech immediately with 15,000 free characters plus 5,000 characters per day. Sign up is only needed if you want 5,000 characters per generation instead of the free limit.
What models are available on the free tier?
The free tier includes 7 free models: Kokoro, Piper, VITS, MeloTTS, Kani TTS 2, OuteTTS, Pocket TTS, Kitten TTS, Ming-Omni TTS, MOSS-TTS Nano. These are lightweight models optimized for speed and lowVRAM requirements.
How does voice cloning work on TTS.ai?
Voice cloning requires cloning from just 5 seconds of audio. GPT-SoVITS is a few-shot voice cloning TTS that replicates any voice from 5 seconds. Chatterbox offers state-of-the-art zero-shot voice cloning with emotion control. Voice cloning is available on the Starter plan ($9/mo) and above.
What languages are supported?
TTS.ai supports 33+ languages across its 273+ voices. Kokoro supports English, Japanese, Chinese, and Korean. MeloTTS supports English (American, British, Indian, Australian), Spanish, French, Chinese, Japanese, and Korean. Speech-to-text supports 99 languages with Whisper and Faster Whisper.
Is there an API available?
Yes, TTS.ai offers a developer-first OpenAI-compatible REST API with one endpoint for 20+ models. It includes streaming support for real-time applications, batch processing for large jobs, and webhook notifications. API access is included in the free tier and all paid plans.
Can I use TTS.ai for commercial projects?
Yes, commercial use is allowed on the free tier and all paid plans. The platform explicitly states 'Commercial use OK' for the free tier, making it suitable for business applications, content creation, and product integration.
What audio formats can I export?
The platform includes an audio converter that supports MP3, WAV, FLAC, OGG, and M4A formats. You can download generated audio files in these formats for any use.
How fast is the text-to-speech generation?
Speed varies by model. Kokoro generates audio nearly 100x faster than real-time on GPU. Chatterbox Turbo has sub-200ms latency and runs at 6x real-time. Piper runs at real-time speeds even on Raspberry Pi 4. Free models are optimized for fast inference.
What VRAM do I need to run these models?
VRAM requirements vary significantly: Kitten TTS needs 0GB (CPU-only), Piper needs 0GB (CPU only), Kokoro needs 1.5GB VRAM, most Standard models need 4GB VRAM, Tortoise TTS needs 8GB VRAM, and Bark needs 5GB VRAM. Many free models are CPU-optimized.
Can I embed TTS on my website?
Yes, TTS.ai offers an embed widget that adds TTS to any website with just one line of code. This allows you to integrate text-to-speech functionality directly into your web pages without building your own backend.