Amazon Polly vs Stable Audio: Which Is Better in 2026?
It's a coin flip on the headline score: Amazon Polly (7.7) and Stable Audio (7.4) finish within 0.3 points. The choice comes down to your specific use case, not raw quality.
Head-to-head
| Metric | Amazon Polly | Stable Audio |
|---|---|---|
| Overall score | 7.7 | 7.4 |
| Voice quality | 7.0 | 8.0 |
| Value | 9.0 | 7.0 |
| UI | 6.0 | 7.0 |
| Free tier | Yes | Yes |
| Cheapest paid plan | $4/mo | $12/mo |
| Most popular plan | $16/mo | $30/mo |
| Languages supported | 40 | 1 |
| Voices in catalog | 100 | — |
| Voice cloning | No | No |
| API available | Yes | Yes |
| Emotion control | Yes | No |
| Multi-speaker | Yes | No |
| Commercial use | Yes | Yes |
| Audio quality | studio-24kHz | studio-44.1kHz |
| Output formats | mp3, wav, ogg, pcm | mp3, wav |
| Founded | 1994 · United States | 2023 · United Kingdom |
| Enterprise plan | Yes | Yes |
Pricing showdown
At entry pricing, Amazon Polly starts at $4/mo versus Stable Audio at $12/mo.
When to choose Amazon Polly
- Budget is the dominant constraint and you need predictable per-minute economics.
- You publish in five or more languages and need a single tool that covers all of them.
When to choose Stable Audio
- You're auditioning against human voice talent and need to sound studio-grade.
Related comparisons
Frequently asked questions
Is Amazon Polly or Stable Audio better for podcast voiceover?
Amazon Polly (7.7/10) and Stable Audio (7.4/10) are effectively tied for podcast voiceover. Decide on language coverage and editor preference.
Which one is cheaper?
Amazon Polly starts at $4/month, cheaper than Stable Audio's $12/month entry plan.
Which has more languages?
Amazon Polly supports 40 languages; Stable Audio supports 1. Amazon Polly is the broader choice for multilingual projects.
Do both offer voice cloning?
Neither offers voice cloning. Look at ElevenLabs, Resemble AI, or HeyGen for cloning workflows.
Which is better for ivr phone systems?
For ivr phone systems, Amazon Polly scores 8.8/10 versus Stable Audio's 7.4/10 — see our use-case page for the full ranked list.