# Free Text-to-Speech (TTS) APIs & Voice Synthesis

> 3 providers · 4 free models · Last updated: 12 Nov 2026

## Quick Answer

4 free Text-to-Speech (TTS) APIs & Voice Synthesis models across 3 providers including Groq, NVIDIA NIM, and Deepgram. Verified rate limits, context windows, and OpenAI-compatible endpoints. Last updated: 12 Nov 2026.

Free text-to-speech API endpoints for voice synthesis and voice agents, including Groq (CanopyLabs Orpheus) and Deepgram (Aura) with generous free allowances and no credit card required.

## Quick Connect

Text-to-speech audio synthesis with Orpheus on Groq.

- **Base URL:** `https://api.groq.com/openai/v1`
- **Model:** `canopylabs/orpheus-v1-english`
- **Provider:** [Groq](/providers/groq/)

### Python (OpenAI SDK)

```python
from openai import OpenAI

client = OpenAI(
    base_url="https://api.groq.com/openai/v1",
    api_key="your-api-key",  # from Groq
)

response = client.chat.completions.create(
    model="canopylabs/orpheus-v1-english",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)
```

### cURL (Terminal / Shell)

```bash
curl -X POST "https://api.groq.com/openai/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "model": "canopylabs/orpheus-v1-english",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

## Rate Limits & Model Inventory

| Model | Provider | Cost | Context | RPM | TPM | RPD | Day tokens | Verified |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| canopylabs/orpheus-v1-english | [Groq](/providers/groq/) | $0 | Text-to-speech | 10 | 1.2K ASH (Audio sec/hr) | 100 | 3.6K ASD (1h audio/day) | 2026-11-12 |
| canopylabs/orpheus-arabic-saudi | [Groq](/providers/groq/) | $0 | Text-to-speech | 10 | 1.2K ASH (Audio sec/hr) | 100 | 3.6K ASD (1h audio/day) | 2026-11-12 |
| magpie-tts-zeroshot | [NVIDIA NIM (build.nvidia.com)](/providers/nvidia-nim--build-nvidia-com/) | $0 | Model-dependent | ~40 | Not published | Not published | ~1,000 credits at signup (up to ~5,000) | 2026-11-12 |
| aura | [Deepgram](/providers/deepgram/) | $0 | N/A | N/A | N/A | N/A | N/A | 2026-11-12 |

Web page: https://freeinference.dev/free-tts-api/
Machine-readable JSON: /data/providers.json
Agent summary: /llms.txt

Numbers cross-checked against official docs and live probes as of 2026-11-12. Limits change without notice — this is a map, not a contract.