Updated February 14, 2025

Comparing ElevenLabs and Resemble AI Voice Models

Q: How does voice cloning work?

Voice cloning involves using AI technology to replicate a person's voice based on audio samples. Cartesia's system requires just3 seconds of audio to create a high-quality clone. The AI analyzes the unique characteristics of the voice, including tone, pitch, and cadence, to generate new speech that sounds like the original speaker. This technology is useful for various applications, including personalized voice assistants and content creation.

Q: Which provide is the fastest text to speech voice model?

Cartesia's voice AI boasts a low latency of sub 40 ms. This ensures that users experience real-time interactions, making it ideal for applications like customer support and gaming. The low latency is achieved through the use of State Space Models (SSMs), which optimize performance compared to traditional architectures.

Q: Can I customize the voice output?

Yes, Cartesia allows extensive customization of voice output. Users can adjust various parameters such as pitch, speed, and emotion to create a more personalized audio experience. This level of control ensures that the generated speech can be tailored to fit specific contexts, whether for storytelling, customer interactions, or other applications requiring unique voice characteristics.

Q: What's a better alternative to ElevenLabs and Resemble AI?

Cartesia is a better alternative—it's the fastest voice model with sub-40ms latency, ultra-realistic voices, and hallucination-free text-to-speech that handles complex transcripts and industry-specific terms accurately. This makes the Cartesia model perfect for a wide range of uses like real-time customer support agents, call centers, healthcare, gaming, sales, and more.

Discover key differences between ElevenLabs and Resemble AI voice models. Learn about features, pricing, and performance.

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Comparing ElevenLabs and Resemble AI Voice Models

Eleven Labs offers highly realistic voices with natural prosody and emotion control, while Resemble AI focuses on voice cloning accuracy and fast generation.

Latency

75 ms for the lower quality Flash Model, and 300ms+ for the full model

170ms-3000ms

Voice Quality

Natural and realistic, widely used by all types of content creators

Higher quality voices for engaging content

Character Limits

Limited to 40k characters per request

Allows for extensive content generation

Instant Cloning

Requires 10 seconds of audio

Requires 3 minutes of audio

Professional Voice Cloning

Requires 60 minutes of audio

Requires 10 minutes to an hour of audio

Pronunciation Accuracy

IPA support but isolated pronunciation

Enhanced clarity for complex terms

Voice Customizations

Stability, similarity, and style exaggeration controls

Flexible adjustments for personalized output

Telephony Optimization

8kHz audio, telephony optimized voices

Designed for clear communication in calls

Flexible deployments

No on-device or on-prem support

Languages Supported

149

Concurrency

Up to 15 on highest self serve tier, custom for enterprise

Limited concurrent usage options

Latency

ElevenLabs 75 ms for the lower quality Flash Model, and 300ms+ for the full model

Resemble AI 170ms-3000ms

Voice Quality

ElevenLabs Natural and realistic, widely used by all types of content creators

Resemble AI Higher quality voices for engaging content

Character Limits

ElevenLabs Limited to 40k characters per request

Resemble AI Allows for extensive content generation

Instant Cloning

ElevenLabs Requires 10 seconds of audio

Resemble AI Requires 3 minutes of audio

Professional Voice Cloning

ElevenLabs Requires 60 minutes of audio

Resemble AI Requires 10 minutes to an hour of audio

Pronunciation Accuracy

ElevenLabs IPA support but isolated pronunciation

Resemble AI Enhanced clarity for complex terms

Voice Customizations

ElevenLabs Stability, similarity, and style exaggeration controls

Resemble AI Flexible adjustments for personalized output

Telephony Optimization

ElevenLabs 8kHz audio, telephony optimized voices

Resemble AI Designed for clear communication in calls

Flexible deployments

ElevenLabs No on-device or on-prem support

Resemble AI No on-device or on-prem support

Languages Supported

ElevenLabs 32

Resemble AI 149

Concurrency

ElevenLabs Up to 15 on highest self serve tier, custom for enterprise

Resemble AI Limited concurrent usage options

Look for a ElevenLabs and Resemble AI Alternatives?

Voice Clone with 3s of Audio

Cartesia delivers high-fidelity voice cloning with unmatched accuracy.

Ultra-Realistic Voices

Experience lifelike voices that are nearly indistinguishable from human speech.

No Hallucinations Text to Speech

Enjoy accurate text-to-speech with no errors, handling complex transcripts and industry-specific terms effectively.

Enterprise Ready

Enterprise-grade reliability with 99.9% uptime, SOC2 compliance, and full on-premises support.

How they stack up

Voice Quality Comparison

When evaluating voice quality, ElevenLabs and Resemble AI present distinct strengths. ElevenLabs achieved a high speech naturalness score, with 89.60% of its outputs rated as very human-like. In contrast, Resemble AI's naturalness ratings vary, but it is recognized for its ability to create diverse voice profiles. The pronunciation accuracy of ElevenLabs stands at 87.13%, while Resemble AI's metrics are still under review. This evaluation highlights how ElevenLabs consistently delivers high-quality voice outputs, while Resemble AI focuses on customizable voice experiences.

Latency Evaluation Insights

Latency is a critical factor in voice AI performance. In our evaluation, we measured the Time to First Audio (TTFA) for both ElevenLabs and Resemble AI. ElevenLabs recorded a 90th percentile TTFA of 200ms, showcasing its ability to deliver quick responses. Resemble AI's TTFA is slightly higher, indicating room for improvement in responsiveness. This evaluation underscores the importance of low latency in real-time applications, with ElevenLabs currently leading in this aspect, making it a preferred choice for applications requiring immediate audio feedback.

Hallucination Rate Analysis

In assessing the hallucination rate of ElevenLabs and Resemble AI, we focused on the accuracy of generated content. ElevenLabs demonstrated a low hallucination rate, with only 5% of generated outputs containing inaccuracies or irrelevant information. Resemble AI's performance in this area is still being fine-tuned, but it is known for producing contextually relevant outputs. This evaluation highlights the reliability of ElevenLabs in maintaining content accuracy, while Resemble AI continues to enhance its capabilities in generating coherent and contextually appropriate speech.

Voice Cloning

In this evaluation, we compare the voice cloning capabilities of ElevenLabs and Resemble AI. ElevenLabs boasts an impressive Word Error Rate (WER) of 2.83%, indicating high accuracy in speech generation. In contrast, Resemble AI's performance metrics are still being refined, but it is known for its flexibility in voice customization. Both models were assessed using a diverse set of prompts, ensuring a comprehensive evaluation of their cloning abilities. ElevenLabs excels in producing lifelike speech, while Resemble AI offers unique voice design options, making them both strong contenders in the voice cloning arena.

Voice Design Control

When it comes to voice design controllability, ElevenLabs and Resemble AI offer unique features. ElevenLabs allows users to adjust parameters like pitch and speed, providing a degree of customization. In contrast, Resemble AI excels in creating distinct voice profiles, enabling users to design voices that match specific personas. This evaluation reveals that while ElevenLabs provides solid control over voice characteristics, Resemble AI stands out for its innovative approach to voice design, making it a valuable tool for creative applications.

Explore Pricing for ElevenLabs and Resemble AI

Free - $0 per month with 10k characters

Learn about pricing options for various needs

Starter - $5 per month with 30k characters

Includes priority support and volume discounts

Creator - $11 per month with 100k characters

Comprehensive plan for large-scale integrations

Pro - $99 per month with 500k characters

Tailored solutions for enterprise-scale needs

Scale - $330 per month with 2M characters

Offers premium support and extensive features

Trusted by leading enterprises. Speaking from experience.

Discover success stories

Elise AI

We didn't switch to Sonic 3.5 because it was incrementally better, we switched because nothing else came close… we've seen a 2.9% lift in our conversion and a 12.2% increase in customer engagement.

ServiceNow

Cartesia's state-space models bring enterprise-grade speed and quality to our AI Voice Agents… making it possible for businesses to deploy secure, scalable voice agents that can understand, act, and adapt in real time.

Sierra

Cartesia Sonic 3.5 has become one of the top-performing models for us by combining low latency with natural pacing… helping us deliver strong voice quality across a growing set of languages where other models often fall short.

Callers

Sonic 3.5 has been a meaningful upgrade for Callers… latency and naturalness directly impact conversational flow and user success, and the new model noticeably improves both. We've seen more human interactions — especially in high-volume customer conversations where every millisecond and every turn matters.

Take2 AI

We moved from an incumbent TTS provider to Cartesia because of the support experience. After repeated roadblocks with our previous provider, the difference with Cartesia has been transformative — responsive, technical, and genuinely invested in our success.

Elise AI

We didn't switch to Sonic 3.5 because it was incrementally better, we switched because nothing else came close… we've seen a 2.9% lift in our conversion and a 12.2% increase in customer engagement.

ServiceNow

Cartesia's state-space models bring enterprise-grade speed and quality to our AI Voice Agents… making it possible for businesses to deploy secure, scalable voice agents that can understand, act, and adapt in real time.

Sierra

Cartesia Sonic 3.5 has become one of the top-performing models for us by combining low latency with natural pacing… helping us deliver strong voice quality across a growing set of languages where other models often fall short.

Callers

Sonic 3.5 has been a meaningful upgrade for Callers… latency and naturalness directly impact conversational flow and user success, and the new model noticeably improves both. We've seen more human interactions — especially in high-volume customer conversations where every millisecond and every turn matters.

Take2 AI

We moved from an incumbent TTS provider to Cartesia because of the support experience. After repeated roadblocks with our previous provider, the difference with Cartesia has been transformative — responsive, technical, and genuinely invested in our success.

Elise AI

We didn't switch to Sonic 3.5 because it was incrementally better, we switched because nothing else came close… we've seen a 2.9% lift in our conversion and a 12.2% increase in customer engagement.

ServiceNow

Cartesia's state-space models bring enterprise-grade speed and quality to our AI Voice Agents… making it possible for businesses to deploy secure, scalable voice agents that can understand, act, and adapt in real time.

Sierra

Cartesia Sonic 3.5 has become one of the top-performing models for us by combining low latency with natural pacing… helping us deliver strong voice quality across a growing set of languages where other models often fall short.

Callers

Sonic 3.5 has been a meaningful upgrade for Callers… latency and naturalness directly impact conversational flow and user success, and the new model noticeably improves both. We've seen more human interactions — especially in high-volume customer conversations where every millisecond and every turn matters.

Take2 AI

We moved from an incumbent TTS provider to Cartesia because of the support experience. After repeated roadblocks with our previous provider, the difference with Cartesia has been transformative — responsive, technical, and genuinely invested in our success.

Elise AI

We didn't switch to Sonic 3.5 because it was incrementally better, we switched because nothing else came close… we've seen a 2.9% lift in our conversion and a 12.2% increase in customer engagement.

ServiceNow

Cartesia's state-space models bring enterprise-grade speed and quality to our AI Voice Agents… making it possible for businesses to deploy secure, scalable voice agents that can understand, act, and adapt in real time.

Sierra

Cartesia Sonic 3.5 has become one of the top-performing models for us by combining low latency with natural pacing… helping us deliver strong voice quality across a growing set of languages where other models often fall short.

Callers

Sonic 3.5 has been a meaningful upgrade for Callers… latency and naturalness directly impact conversational flow and user success, and the new model noticeably improves both. We've seen more human interactions — especially in high-volume customer conversations where every millisecond and every turn matters.

Take2 AI

We moved from an incumbent TTS provider to Cartesia because of the support experience. After repeated roadblocks with our previous provider, the difference with Cartesia has been transformative — responsive, technical, and genuinely invested in our success.

Cresta

Sonic 3.5 represents a significant evolution over previous TTS models, delivering refined prosodic rhythm, natural intonation, superior pacing and wider emotional range for more “human” sounding voices.

Bolna

Indian voice agents live or die on whether order IDs, alphanumerics, and multilingual code-switching come out right on a phone line. Sonic 3.5 handles alphanumerics natively… and lands first audio at 100ms p90.

Goodcall

Sonic is the only product in existence with model latency of less than 100 ms, outperforming its next best alternative by a factor of four. This level of performance represents a quantum leap forward.

Quora

Sonic powers audio on Poe across 100+ voices and 14 languages, supporting Quora's millions of users with SOC 2 compliance and unlimited concurrency for enterprise customers.

Fundamento

We run 20M+ outbound calls per month on Cartesia, with peak concurrency of 5,000 calls in a single minute, and 100ms time-to-first-byte — 2x faster than every other voice provider we tested.

Cresta

Sonic 3.5 represents a significant evolution over previous TTS models, delivering refined prosodic rhythm, natural intonation, superior pacing and wider emotional range for more “human” sounding voices.

Bolna

Indian voice agents live or die on whether order IDs, alphanumerics, and multilingual code-switching come out right on a phone line. Sonic 3.5 handles alphanumerics natively… and lands first audio at 100ms p90.

Goodcall

Sonic is the only product in existence with model latency of less than 100 ms, outperforming its next best alternative by a factor of four. This level of performance represents a quantum leap forward.

Quora

Sonic powers audio on Poe across 100+ voices and 14 languages, supporting Quora's millions of users with SOC 2 compliance and unlimited concurrency for enterprise customers.

Fundamento

We run 20M+ outbound calls per month on Cartesia, with peak concurrency of 5,000 calls in a single minute, and 100ms time-to-first-byte — 2x faster than every other voice provider we tested.

Cresta

Sonic 3.5 represents a significant evolution over previous TTS models, delivering refined prosodic rhythm, natural intonation, superior pacing and wider emotional range for more “human” sounding voices.

Bolna

Indian voice agents live or die on whether order IDs, alphanumerics, and multilingual code-switching come out right on a phone line. Sonic 3.5 handles alphanumerics natively… and lands first audio at 100ms p90.

Goodcall

Sonic is the only product in existence with model latency of less than 100 ms, outperforming its next best alternative by a factor of four. This level of performance represents a quantum leap forward.

Quora

Sonic powers audio on Poe across 100+ voices and 14 languages, supporting Quora's millions of users with SOC 2 compliance and unlimited concurrency for enterprise customers.

Fundamento

We run 20M+ outbound calls per month on Cartesia, with peak concurrency of 5,000 calls in a single minute, and 100ms time-to-first-byte — 2x faster than every other voice provider we tested.

Cresta

Sonic 3.5 represents a significant evolution over previous TTS models, delivering refined prosodic rhythm, natural intonation, superior pacing and wider emotional range for more “human” sounding voices.

Bolna

Indian voice agents live or die on whether order IDs, alphanumerics, and multilingual code-switching come out right on a phone line. Sonic 3.5 handles alphanumerics natively… and lands first audio at 100ms p90.

Goodcall

Sonic is the only product in existence with model latency of less than 100 ms, outperforming its next best alternative by a factor of four. This level of performance represents a quantum leap forward.

Quora

Sonic powers audio on Poe across 100+ voices and 14 languages, supporting Quora's millions of users with SOC 2 compliance and unlimited concurrency for enterprise customers.

Fundamento

We run 20M+ outbound calls per month on Cartesia, with peak concurrency of 5,000 calls in a single minute, and 100ms time-to-first-byte — 2x faster than every other voice provider we tested.

Frequently asked questions

How does voice cloning work?

Which provide is the fastest text to speech voice model?

Can I customize the voice output?

What's a better alternative to ElevenLabs and Resemble AI?