Cartesia vs Fliki
Discover the differences between Cartesia and Fliki voice AI models. Compare features, pricing, and performance.
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Compare Cartesia and Fliki Voice AI Models
Cartesia offers ultra-fast voice generation with a latency of just 40ms, ensuring real-time interactions. Its models provide ultra-realistic voices without hallucinations, making them ideal for various applications.
Updated on:
Feb 14, 2025
Features
Cartesia
40ms for the Sonic Turbo model, 90ms for the Sonic 2 model
Consistently rated as more natural, expressive, and realistic in blinded human evaluations
Infinite request length
Requires 3 seconds of audio
IPA support with strong contextual understanding
Slider control for speed and emotion + 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
Fliki
Higher latency, impacting responsiveness
Higher quality voices for engaging content
Unlimited context for better prosody
Not supported
Not supported
Improved pronunciation for complex terms
Basic customization options available
Standard audio quality for telephony
Limited on-device capabilities
80
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.
Low Latency Performance
Cartesia's Sonic model achieves a latency of just 199 ms, ensuring rapid responses.
High-Quality Voice Cloning
Instantly clone voices with just 3 seconds of audio, ensuring high fidelity and clarity.
Ultra-Realistic Voices
Cartesia's voices are nearly indistinguishable from human speech, enhancing user engagement.
Enterprise Ready
Enterprise-grade reliability with 99.9% uptime, SOC2 compliance, and full on-premises support.
Voice Quality Comparison
In the realm of voice quality, Cartesia consistently outperforms its competitors. With a NISQA score of 4.7, Cartesia's Sonic model is recognized for its natural and realistic voice output. In contrast, Fliki's voice quality ratings fall short, averaging around 4.38. Cartesia's advanced state space model architecture allows for superior audio clarity and emotional sensitivity, making its voices nearly indistinguishable from human speech. This level of quality is crucial for applications in customer support, healthcare, and media.
Latency Performance Review
Latency is a critical factor in voice AI applications. Cartesia measures latency using the Time to First Audio (TTFA) metric, achieving an impressive TTFA of 199 ms. This is significantly faster than Fliki, which has a TTFA of 300 ms. Cartesia's Sonic model is built on state space models (SSMs), allowing for greater latency optimization compared to traditional transformer architectures. This low latency ensures that responses are quick and natural, enhancing user experience in real-time applications.
Hallucination Rate Analysis
Cartesia's voice cloning technology boasts a no hallucination feature, ensuring that the generated audio is clear and accurate. This is a significant advantage over Fliki, which may experience distortions in its output. Cartesia's advanced algorithms eliminate errors and maintain the authenticity of the voice clone, making it reliable for various applications. The focus on high-quality audio without hallucinations is essential for maintaining user trust and satisfaction in voice AI solutions.
Voice Cloning Showdown
When it comes to voice cloning, Cartesia shines with its ability to create an instant clone from just 3 seconds of audio. This feature allows for unlimited instant voice cloning, making it a powerful tool for developers. In contrast, Fliki imposes restrictions on cloning capabilities. Cartesia employs advanced embedding technology to ensure high-quality voice clones that maintain clarity and authenticity, even in noisy environments. Additionally, Cartesia's voice mixing and design capabilities provide a wider array of diverse voices for various applications.
Voice Design Controllability
Cartesia stands out by offering unique features for voice design controllability. It allows users to modulate emotion and speed, enabling refined voice adjustments while maintaining a natural sound. Additionally, Cartesia supports localization, letting users adapt an American voice to speak with a French accent, for example. In contrast, Fliki provides limited control options, focusing primarily on stability and similarity, which may not meet the diverse needs of developers seeking customization.
Explore Pricing for Cartesia and Fliki
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
Fliki
Basic features for beginners
Enhanced features for creators
Advanced features for teams
Comprehensive features for enterprises
Designed for large organizations
What Cartesia Customers Say
Join the growing list of companies opting for Sonic.
"Cartesia’s voice API power dynamic and empathetic conversational experiences that are consistently dependable. What really stands out to me is how natural and considerate the responses feel—especially the empathetic tone in statements like ‘I’m sorry, that must be frustrating.’"
Sami Ghoche, CEO of Forethought
"In 1999, Salesforce brought software to the cloud. In 2025, 11x is killing software as we know it and unleashing the era of digital workers. To realise this vision, we needed AI voice technology that feels truly human. Cartesia’s technology gives our AI digital workers reps the speed, reliability, and natural expressiveness required to engage customers at scale.
It's the only solution fit for our relentless drive toward innovation.”
Keith Fearon, Head of Product & Growth, 11x
"Before conversational voice models like Cartesia, Thoughtly relied on legacy text-to-speech APIs from major cloud providers. Nearly two years later, the evolution of this technology is staggering—customers can clone their voice and hear it speaking autonomously over the phone in just 60 seconds.”
Torrey Leonard, CEO, Thoughtly
