ElevenLabs vs Amazon Polly
Comparing ElevenLabs and Amazon Polly Voice Models. Discover the differences in features, pricing, and performance.
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Comparing ElevenLabs and Amazon Polly Voice Models
Eleven Labs offers more natural and expressive voices with better emotional range, while Amazon Polly provides reliable, clear speech with extensive language support and AWS integration, though less emotional variation.
Updated on:
Feb 14, 2025
Features
ElevenLabs
75 ms for the lower quality Flash Model, and 300ms+ for the full model
Natural and realistic, widely used by all types of content creators
Limited to 40k characters per request
Requires 10 seconds of audio
IPA support but isolated pronunciation
Stability, similarity, and style exaggeration controls
8kHz audio, telephony optimized voices
No on-device or on-prem support
32
Up to 15 on highest self serve tier, custom for enterprise
Amazon Polly
100ms – 500ms + network time
More robotic voices
Limited character count for longer texts
Not supported
Not supported
IPA support, isolated pronunciation
Stability, similarity, and style exaggeration controls
8kHz audio
No on-device or on-prem support
29
Up to 18 concurrent
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Voice Quality Comparison
When evaluating voice quality between ElevenLabs and Amazon Polly, ElevenLabs stands out with a high pronunciation accuracy of 81.97%.
In comparison, Amazon Polly achieved a slightly lower pronunciation accuracy of 84.72%. However, ElevenLabs has a lower WER of 2.83%, indicating better overall accuracy in speech generation.
Amazon Polly, while slightly behind in WER at 3.18%, maintains a high level of context awareness and prosody accuracy. This evaluation underscores the importance of both pronunciation and overall voice quality in text-to-speech applications.
Latency Analysis
In our latency evaluation, we measured the Time to First Audio (TTFA) for both ElevenLabs and Amazon Polly.
We conducted 100 TTFA measurements for each provider and calculated the 90th percentile score. ElevenLabs demonstrated a TTFA of 135ms, showcasing its efficiency in generating audio quickly. Amazon Polly, while slightly slower, still performed well with a TTFA of 150ms.
This analysis highlights the importance of low latency in real-time applications, where quick audio generation is crucial for user experience.
Hallucination Rate Check
The hallucination rate evaluation between ElevenLabs and Amazon Polly reveals interesting insights.
ElevenLabs, with its advanced algorithms, achieved a lower hallucination rate, indicating that it generates more accurate and contextually relevant speech outputs. In contrast, Amazon Polly, while effective, showed a slightly higher rate of hallucination in certain contexts.
This evaluation emphasizes the need for continuous improvement in AI models to minimize inaccuracies and enhance user trust in voice applications.
Voice Design Control
In assessing voice design controllability, ElevenLabs offers a robust set of features that allow users to fine-tune voice characteristics effectively.
With a high context awareness score of 63.37%, ElevenLabs enables nuanced adjustments in tone and emphasis. Amazon Polly, while also effective, scored slightly lower in context awareness at 55.30%.
This evaluation highlights the importance of controllability in voice design, allowing developers to create tailored experiences that resonate with users.
Pricing Comparison for ElevenLabs and Amazon Polly
ElevenLabs
Free - $0 per month with 10k characters
Starter - $5 per month with 30k characters
Creator - $11 per month with 100k characters
Pro - $99 per month with 500k characters
Scale - $330 per month with 2M characters
Amazon Polly
Standard voices priced at $4.00 per 1 million characters
Neural voices priced at $16.00 per 1 million characters
Long-Form voices priced at $100.00 per 1 million characters
Generative voices priced at $30 per 1 million characters
Custom pricing based on usage and requirements
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