Cartesia vs Speechify

Discover the key differences between Cartesia and Speechify voice AI models. Learn about their features and pricing.

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Comparing Cartesia and Speechify Voice AI Models

Cartesia offers ultra-fast voice generation with a 40 ms latency, best suited for real-time interactions. Better still, its voices are ultra-realistic with no hallucinations, providing clarity and authenticity for various applications.

Updated on:

Feb 14, 2025

Features

Latency

Latency

Latency

Voice Quality

Voice Quality

Voice Quality

Character Limits

Character Limits

Character Limits

Instant Cloning

Instant Cloning

Instant Cloning

Professional Voice Cloning

Professional Voice Cloning

Professional Voice Cloning

Pronunciation Accuracy

Pronunciation Accuracy

Pronunciation Accuracy

Voice Customizations

Voice Customizations

Voice Customizations

Telephony Optimization

Telephony Optimization

Telephony Optimization

Flexible deployments

Flexible deployments

Flexible deployments

Languages Supported

Languages Supported

Languages Supported

Concurrency

Concurrency

Concurrency

Cartesia

40ms for the Sonic Turbo model, 90ms for the Sonic 2.0 model

Consistently rated as more natural, expressive, and realistic in blinded human evaluations

Infinite request length

Requires 3 seconds of audio

Requires 30 minutes of audio

IPA support with strong contextual understanding

Fully customizable voice with speed and emotion controls + synthetic voice mixing and design

8kHz audio, telephony optimized voices

Supports both on-prem and on-device deployments

15 languages with extensive dialect coverage

Up to 15 on highest self-serve tier (60 parallel conversations), custom for enterprise

Speechify

sub-250ms

Less depth and reliability ratings in human evals

Limited character count for longer texts

Requires 20 seconds of audio

Requires several hours of voice data

IPA support, isolated pronunciation

Stability, similarity, and style exaggeration controls

8kHz audio

No on-device or on-prem support

60

Limited concurrent usage options

Cartesia - Advanced AI Voice Capabilities

Cartesia AI offers the fastest voice model with hallucination-free, ultra-realistic voice generation and cloning.

No Hallucinations

Enjoy accurate transcription with no errors in voice generation. Handles complex transcripts well, including names, addresses, times, and more.

Enterprise Ready

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

Voice Quality Comparison

Cartesia consistently outshines Speechify in voice quality, earning higher ratings in human evaluations for naturalness and realism. The Sonic 2.0 model achieves an impressive quality score of 4.7 out of 5 in independent evaluations—significantly above Speechify's ratings.

Latency Performance

The Cartesia Sonic model achieves impressive latency performance, with a Time to First Audio (TTFA) of just 120 ms—significantly faster than Speechify's 832 ms TTFA at the self-serve tier.

This superior speed stems from Cartesia's State Space Model (SSM) architecture, which optimizes latency better than traditional transformer designs. As a result, users enjoy near-instantaneous audio responses, making the system ideal for real-time applications.

Hallucination Rate Analysis

Cartesia's text to speech technology boasts a no hallucination feature, ensuring that the generated audio is clear and authentic. This is a significant advantage over Speechify, which may produce distorted outputs under certain conditions.

Cartesia's advanced algorithms maintain the integrity of the original transcript, providing users with accurate, reliable and high-quality voice outputs. This focus on accuracy and clarity is essential for applications where voice fidelity is paramount.

Voice Cloning Showdown

Cartesia excels at voice cloning, creating instant clones from just 3 seconds of audio. This unlimited cloning capability makes it a powerful tool for creators and developers, while Speechify requires longer 30-second audio samples and has more restrictions.

Using advanced embedding technology, Cartesia produces high-quality voice clones that preserve accents and voice characteristics, even with noisy audio. The platform's voice mixing and design features also offer a broader range of voice options.

Voice Design Controllability

Cartesia distinguishes itself through advanced voice design controls, including emotion and speed modulation. Users can make precise adjustments while maintaining natural, seamless audio quality. The platform also supports voice localization with different accents, adding to its versatility.

By comparison, Speechify provides only basic control options, prioritizing stability over the detailed customization that Cartesia offers.

Explore Pricing for Cartesia and Speechify

Cartesia

Free - $0 per month with 10k free credits

Pro - $5 per month with 100k credits

Startup - $49 per month with 1.25M credits

Scale - $299 per month with 8M credits

Enterprise - trusted by Fortune 500 companies

Speechify

10 standard reading voices, listen anywhere

200+ high quality voices, 60+ languages

Access to all features, priority support

Unlimited access, advanced features

Custom solutions, dedicated support

Trusted by 50K+ Customers

Trusted by 50K+ Customers

Trusted by 50K+ Customers

Frequently asked questions

How does voice cloning work?

How does voice cloning work?

How does voice cloning work?

What is the latency of Cartesia's voice models?

What is the latency of Cartesia's voice models?

What is the latency of Cartesia's voice models?

Can I customize the voice output?

Can I customize the voice output?

Can I customize the voice output?

What languages does Cartesia support?

What languages does Cartesia support?

What languages does Cartesia support?

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HIPAA

SOC-2 Type II

Real-time, multimodal intelligence for every device.

Sign up for early access to new releases

HIPAA

SOC-2 Type II

Real-time, multimodal intelligence for every device.

Sign up for early access to new releases

HIPAA

SOC-2 Type II