Cartesia vs Google Text to Speech
Learn about the differences between Cartesia and Google TTS in voice AI models.
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Compare Cartesia and Google TTS
Explore features like latency and voice quality for both models.
Updated at:
Feb 14, 2025
Features
Cartesia
90 ms + network time
Consistently rated as more natural, expressive, and realistic in blinded human evaluations
Infinite request length
Requires 5-10 seconds of audio
IPA Support, strong contextual understanding
Fully customizable voice with speed and emotion controls + synthetic voice mixing and design
8kHz audio, telephony optimized voices
Real-time generation on-device
17 languages with extensive dialect coverage
Up to 15 on highest self serve tier, custom for enterprise
Google TTS
200 ms to 1000 ms
Voice quality is often rated lower, lacking depth and reliability
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
Voice Quality Comparison
In terms of voice quality, Cartesia consistently outperforms Google TTS. Cartesia's Sonic model has been rated 4.7 in independent evaluations, while Google TTS scores lower. Cartesia's voices are noted for their naturalness and emotional sensitivity, making them ideal for real-time applications. The advanced state space model architecture used by Cartesia allows for better clarity and depth in voice generation, ensuring a more engaging user experience compared to Google TTS.
Latency Analysis
Latency is a critical factor in voice AI performance. Cartesia measures latency using the Time to First Audio (TTFA) metric, achieving a remarkable 199 ms. In contrast, Google TTS has a higher latency, which can hinder real-time interactions. Cartesia's Sonic model is built on State Space Models (SSMs), allowing for greater latency optimization compared to traditional transformer architectures. This efficiency ensures that users experience faster response times, making Cartesia a preferred choice for applications requiring low latency.
Hallucination Rate Review
Cartesia excels in minimizing hallucination rates in voice generation. With its advanced AI voice cloning technology, it ensures crystal-clear audio without errors, maintaining authenticity in voice replication. This is a significant advantage over Google TTS, which may produce less reliable outputs. Cartesia's commitment to high-quality voice cloning means users can trust the accuracy and clarity of the generated voices, making it a reliable choice for various applications.
Voice Cloning Showdown
When it comes to voice cloning, Cartesia leads the way with its ability to create an instant clone from just 5 seconds of audio. Unlike Google TTS, which has restrictions on cloning capabilities, Cartesia offers unlimited instant voice cloning. This advanced embedding technology ensures high-quality voice replication, preserving accents and voice quality even in noisy conditions. Additionally, Cartesia's voice mixing and design capabilities provide a diverse range of voices, making it a superior choice for voice cloning applications.
Voice Design Control
Cartesia stands out by offering unique features like emotion and speed modulation, allowing users to refine voice adjustments while maintaining a natural sound. This level of control enables users to customize voices to match specific needs, such as localizing an American voice to speak with a French accent. In contrast, Google TTS provides limited control options, which may not meet the diverse requirements of users looking for tailored voice experiences.
Cartesia - Advanced AI Voice Capabilities
Cartesia AI offers the fastest voice model with hallucination-free, ultra-realistic voice generation and cloning.
High-Quality Voice Cloning
Cartesia's voice cloning delivers lifelike, accurate replicas.
Ultra-Realistic Voices
Enjoy expressive voices that sound nearly indistinguishable from humans.
No Hallucinations
Experience clear audio without errors, ensuring authentic voice output.
Pricing Comparison: Cartesia vs Google TTS
Cartesia
Free - $0/mo. per month with 10k free credits
Pro - $5/mo. per month with 100k credits
Startup - $49/mo. per month with 1.25M credits
Scale - $299/mo. per month with 8M credits
Enterprise - trusted by Fortune 500 companies
Google TTS
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
What Cartesia customers say
Join the growing list of companies opting for Sonic.
"This partnership represents a transformative moment in enterprise AI adoption," said Melissa Gordon, CEO of Rasa. "By combining Rasa’s strengths in enterprise conversational AI with Cartesia's innovative voice technology, we're fundamentally changing how enterprises can deploy and scale AI assistants across their organizations."
"We're thrilled to partner with Cartesia - their technology has dramatically improved the accuracy and reliability of our call center agents. Beyond just providing best-in-class voice AI, the Cartesia team has been a true partner in helping us transform 24/7 patient support for over 215,000 patients. Their support has been instrumental in making exceptional care accessible anytime, anywhere."
Jeffrey Liu, Founder and co-CEO, Assort Health
"Together AI's mission has always been to provide developers with the most powerful and efficient tools for building AI applications," says Vipul Ved Prakash, Together AI's CEO. "Cartesia is leading the charge of building efficient, multimodal models from first principles, starting with their Sonic TTS model. By integrating Sonic into our platform, we're enabling developers to create sophisticated multi-modal applications that leverage the most advanced and lowest latency voice model available today, all while maintaining the simplicity and reliability our users expect."
