Sonic Verify
Revolutionizing Voice AI with Instant, Verifiable Truth.
Ensuring integrity in every spoken word.
Why Credit-Card Issuers Haven't Scaled Voice AI to High-Stakes Interactions
Card issuers depend on experienced agents to explain intricate card benefits, APR changes, fee structures, promotional offers, and dispute resolution policies. These conversations require precision, and every detail matters when customers are making financial decisions or exercising their rights.
Even minor factual errors in these workflows create significant compliance exposure, invite regulatory scrutiny, and damage hard-earned brand trust. A misstated APR or incorrect benefit explanation can trigger consumer complaints, regulatory investigations, and costly remediation efforts.
80%+
Still See Accuracy as Blocker
Organizations that view factual reliability as a major obstacle to voice AI adoption
According to Teknowledge's 2025 research, the trust gap remains substantial. This accuracy concern is the primary reason issuers haven't deployed voice agents to handle complex product-disclosure calls, benefit explanations, or policy-sensitive customer interactions, which leaves significant automation potential untapped.
Real-Time Fact-Checking for Cardholder Voice Interactions
Introducing Sonic Verify
Sonic Verify fundamentally changes the accuracy equation by cross-checking every generated response against your authoritative sources of truth: comprehensive card benefit guides, regulatory policy documents, product databases, and live API connections to your core systems.
When a response contains inaccurate information, references outdated policies, or cannot be verified against approved sources, Sonic Verify automatically corrects it before the audio is synthesized and spoken all with less than 50 milliseconds of latency.
This breakthrough enables safe, compliant automation of high-value customer workflows that were previously too risky for AI handling.
Card Benefits Inquiries
"What travel protection benefits come with my Platinum card?"
Promotional Eligibility
"Am I eligible for the current 0% APR promotion?"
Purchase Protection
"Is this charge covered by my card's protection benefits?"
Sonic Verify vs. ElevenLabs vs AWS
Not all voice AI platforms are built for accuracy-critical financial services interactions. Understanding the architectural differences is essential when evaluating solutions for regulated cardholder conversations.
In live proof-of-concept evaluations, Sonic demonstrates clear advantages: we're the only platform that verifies facts during generation, not after. AWS solutions require orchestrating Lex, Bedrock, Polly, and custom RAG pipelines, which introduces complexity, latency, and operational overhead. ElevenLabs delivers voice naturalness but provides no accuracy verification or governance framework suitable for financial services.
Unlock High-Value, Regulated Voice Use Cases Safely
With Sonic Verify's real-time fact-checking foundation, card issuers can confidently automate customer interactions that have historically been too risky or complex for AI systems, all without exposing the organization to misinformation risks, outdated disclosures, or misquoted contractual terms.
Card Benefit Explanations
Accurately describe travel insurance, purchase protection, extended warranty, and other complex card benefits with confidence.
APR and Fee Disclosures
Provide precise interest rate information, fee structures, and promotional terms that must align exactly with regulatory requirements.
Promotion Eligibility Questions
Determine customer qualification for balance transfer offers, introductory rates, and special financing programs based on current policies.
Policy-Dependent Account Servicing
Handle account modifications, limit adjustments, and service changes that require adherence to specific operational procedures.
Claims and Dispute Guidance
Navigate customers through chargeback processes, fraud reporting, and benefit claim procedures following exact regulatory protocols.
These use cases represent substantial operational value. You've likely limited voice automation to authentication workflows, call routing, or basic FAQs. Sonic Verify enables expansion into revenue-generating and compliance-intensive interactions that previously demanded human expertise and judgment.
Built for Real-Time Accuracy in Regulated Workflows
Sonic Verify's Parallel Stream Architecture
Our technical advantage stems from Cartesia's proprietary state-space streaming architecture, which validates textual content in parallel with audio synthesis, not sequentially.
Verification combines semantic understanding with symbolic matching, ensuring generated responses align precisely with your exact policy language and approved terminology.
Cloud Vendor Approach
Sequential: retrieval → LLM generation → post-hoc validation → TTS synthesis
Breaks real-time performance requirements
ElevenLabs Approach
Fast TTS delivery with natural voice quality
No fact-checking layer; requires complex external middleware
Sonic Verify Advantage
Parallel validation during generation
Speed AND accuracy—no compromises needed
This represents Cartesia's fundamental competitive advantage: you don't need to build a complex RAG chain, orchestration layer, or custom guardrail system to achieve both speed and safety. The verification intelligence is built directly into our streaming model architecture.
The Only Voice Platform Designed for Accuracy-Sensitive, Regulated Customer Calls
01
Eliminates Factual Errors Before Customers Hear Them
Sonic Verify's real-time validation prevents misinformation from ever reaching cardholders, protecting both compliance and brand reputation.
02
Fastest Streaming with Built-In Verification
40–50 millisecond latency with integrated fact-checking—dramatically faster than multi-service cloud architectures that introduce 300-1200+ ms delays.
03
Reduced Engineering Complexity
Single API integration replaces the need to orchestrate and maintain separate services for Lex, Bedrock, custom RAG pipelines, and guardrail frameworks.
04
Compliance-Ready Foundation
Purpose-built for credit card disclosures, benefits explanations, regulatory scripts, and policy-sensitive customer interactions.
05
Differentiated Customer Experience
Deliver conversations that are simultaneously natural, fast, and reliably accurate. This is the combination customers expect from premium card issuers.

Why Sonic Wins This Evaluation
Most vendors force you to compromise between trust and latency, accuracy and naturalness, compliance and user experience. Sonic Verify removes those tradeoffs, making production-grade voice automation for high-stakes cardholder interactions finally achievable.
Sonic is the only platform that gives credit-card issuers both real-time accuracy and real-time performance.