# OuteTTS Review

> OuteTTS review: The llama.cpp-native option: runs via GGUF on CUDA/ROCm/Vulkan/Metal and even in the browser (Transformers.js). License splits by model: the.

![OuteTTS logo](https://www.versusref.com/logos/outetts.png)

The llama.cpp-native option: runs via GGUF on CUDA/ROCm/Vulkan/Metal and even in the browser (Transformers.js). License splits by model: the 0.6B (Qwen3-based) is Apache-2.0, the 1B Llama-based flagship is CC-BY-NC-SA-4.0 (non-commercial).

Among the 46 text-to-speech tools we track, OuteTTS has the 18th-widest language coverage.

See pricing · Open source · facts verified Jul 20, 2026

## What we know about OuteTTS

OuteTTS sits in the text-to-speech apis category, where it is the llama.cpp-native option: runs via GGUF on CUDA/ROCm/Vulkan/Metal and even in the browser (Transformers.js). License splits by model: the 0.6B (Qwen3-based) is Apache-2.0, the 1B Llama-based flagship is CC-BY-NC-SA-4.0 (non-commercial). We keep this OuteTTS profile grounded in primary sources, each fact dated to when we last confirmed it.

OuteTTS does not publish a public per-minute rate we have been able to verify, so the price figure here stays blank until we can confirm one. We would rather show nothing than a guessed number; if you have a current OuteTTS quote, it is the fastest way for us to close that gap.

On capabilities, OuteTTS covers instant voice cloning and self-host / on-prem option. Each of those is verified against OuteTTS's own docs or dashboard, not marketing copy.

Among the 46 text-to-speech tools in our matrix, OuteTTS leads with the 18th-widest language coverage; the fact sheet below has the raw numbers behind that placement.

In total we track 9 verified facts for OuteTTS today, each linking the primary source it came from so you can check our work - and vendor claims we have not measured ourselves are labeled as such on the OuteTTS fact sheet below.

## Fact sheet

### Capabilities

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| Instant voice cloning | ✓  Yes | Jul 20 | [source](https://huggingface.co/OuteAI/Llama-OuteTTS-1.0-1B) |
| Languages supported | 23 languages | Jul 20 | [source](https://huggingface.co/OuteAI/Llama-OuteTTS-1.0-1B) |

### Compliance & trust

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| Self-host / on-prem option | ✓  Yes | Jul 20 | [source](https://github.com/edwko/OuteTTS) |
| Model weights license | Apache-2.0 (OuteTTS-1.0-0.6B) | Jul 20 | [source](https://huggingface.co/OuteAI/OuteTTS-1.0-0.6B) |

### Build experience

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| Official SDKs | Python (pip 'outetts') | Jul 20 | [source](https://github.com/edwko/OuteTTS) |

### Commercial

| Fact | Value | Verified | Source |
| --- | --- | --- | --- |
| Model size (parameters) | 1B (Llama-OuteTTS 1.0) and 0.6B (OuteTTS 1.0 | Jul 20 | [source](https://huggingface.co/OuteAI/Llama-OuteTTS-1.0-1B) |
| Hardware to self-host | Runs via llama.cpp (CUDA | Jul 20 | [source](https://github.com/edwko/OuteTTS) |
| Project maintenance status | active (low activity) | Jul 20 | [source](https://github.com/edwko/OuteTTS) |
| GitHub stars | 1,435 stars | Jul 20 | [source](https://github.com/edwko/OuteTTS) |

Source: https://www.versusref.com/tts/tools/outetts/