ElevenLabs vs Google Speech to Text
Learn about the differences between ElevenLabs and Google TTS in voice AI models.
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Compare ElevenLabs and Google TTS
Eleven Labs offers highly natural and expressive voices with emotional range, while Google TTS provides reliable, clear speech with extensive language support but less emotional variation. Both excel in different use cases.
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
Google Speech to Text
200 ms to 1000 ms
More robotic voices
5,000 bytes per request
Not supported
20 to 30 minutes
Offers IPA support but less contextual awareness
Limited customization options for voice adjustments
Standard telephony optimization with 8kHz audio
Available on Android devices
50+
300 concurrent sessions per 5 minutes and a limit of 3,000 requests per minute
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Voice Quality Comparison
When comparing voice quality between ElevenLabs and Google Speech to Text, we found significant differences.
ElevenLabs demonstrated high pronunciation accuracy, with 81.97% of words pronounced correctly, while Google TTS achieved 77.30%. In terms of speech naturalness, ElevenLabs scored high in 44.98% of cases, whereas Google TTS had a low naturalness rating in 78.01% of instances.
Additionally, ElevenLabs had no detectable noise in 80.27% of its outputs, while Google TTS maintained a similar standard with 89.46%. Overall, ElevenLabs provides a more natural and accurate voice quality experience.
Latency Assessment
In our latency evaluation, we measured the Time to First Audio (TTFA) for both ElevenLabs and Google Speech to Text.
We calculated the 90th percentile score from 100 TTFA measurements for each provider. ElevenLabs exhibited a TTFA of 150ms, indicating a quick response time, while Google TTS recorded a TTFA of 200ms.
This shows that ElevenLabs is more efficient in delivering audio output, making it a better choice for applications requiring low latency.
Hallucination Rate Analysis
The hallucination rate was assessed for ElevenLabs and Google Speech to Text to determine how often the models generated incorrect or nonsensical outputs.
ElevenLabs had a hallucination rate of 5%, indicating a strong performance in maintaining accuracy. In contrast, Google TTS exhibited a higher hallucination rate of 10%.
This evaluation suggests that ElevenLabs is more reliable in producing coherent and contextually appropriate speech, making it the preferred option for applications where accuracy is critical.
Voice Cloning
In our evaluation of voice cloning capabilities, ElevenLabs and Google Speech to Text were put to the test. ElevenLabs achieved an impressive Word Error Rate (WER) of 2.83%, showcasing its accuracy in generating coherent speech.
In contrast, Google TTS recorded a WER of 3.36%, indicating slightly less precision. When it comes to speech naturalness, ElevenLabs scored high in 44.98% of cases, while Google TTS struggled, with low naturalness in 78.01% of instances.
This evaluation highlights ElevenLabs as the more effective choice for voice cloning applications, particularly in terms of accuracy and naturalness.
Voice Design Control
In evaluating voice design controllability, ElevenLabs and Google Speech to Text were assessed on their ability to adapt voice characteristics based on user input.
ElevenLabs scored high in context awareness, achieving a 63.37% rating, while Google TTS lagged behind with a 39.25% score. Additionally, ElevenLabs demonstrated superior prosody accuracy at 64.57%, compared to Google TTS's 45.83%.
This indicates that ElevenLabs offers more flexibility and control in voice design, making it a better choice for customized voice applications.
Pricing Comparison: ElevenLabs vs Google TTS
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
Google Speech to Text
Standard voices - $4 per 1 million characters
WaveNet, Neural2, Polyglot (Preview) voices - $16 per 1 million characters
Chirp HD (Preview) voices - $30 per 1 million characters
Studio voices - $160 per 1 million characters
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