Retell AI vs. Vogent: Which Voice AI Platform Is Right for You?
Author
Ethan Ng
Date Published
The Voice AI landscape is rapidly evolving, with platforms like Retell AI and Vogent offering distinct approaches to building conversational agents. If you're evaluating solutions for your organization, understanding the differences between these platforms is crucial. Here's a detailed comparison to help you make an informed decision.
Pricing
Retell AI: Offers a pay-as-you-go model starting at $0.07 per minute with ElevenLabs voices. Additional costs include $2/month for phone numbers and $8/month for extra knowledge bases. Enterprise plans are available for higher volumes.
Vogent: Also starts at $0.09 per minute but offers volume-based discounts, bringing costs down to $0.04–$0.05 per minute. Unlike Retell, Vogent includes full infrastructure and feature support without additional monthly fees.
Latency
Retell AI: Delivers latency around 800ms, suitable for most customer service scenarios. It supports interruption handling and turn-taking models for more natural conversations.
Vogent: Achieves average 200ms latency across core components. Even when integrating third-party models like GPT, Vogent maintains responsiveness under 800ms, ensuring seamless interactions.
Voice Realism and Customization
Retell AI: Integrates with providers like ElevenLabs and Play.ht but lacks in-house TTS infrastructure. Voice cloning and speaker customization are limited.
Vogent: Offers a broader range of voice providers, including its own ultra-realistic, low-latency TTS voices powered by a re-engineered version of Sesame’s CSM-1B. Features like custom voices and in-app cloning are available, with the option to bring your own voices via API.
Agent Design and Self-Improvement
Retell AI: Provides tools for building and testing agents, including auto-syncing with knowledge bases and handling IVR navigation. However, improvements rely on manual updates or fine-tuning by developers.
Vogent: Features auto-design and self-improvement tooling. Agents can be trained on call transcripts or recordings to mimic top-performing human reps. Once deployed, these agents continuously learn from interactions and retrain autonomously, reducing the need for manual intervention.
Compliance and Scalability
Retell AI: Compliant with HIPAA, GDPR, SOC 2 Type I & II. Supports 20 concurrent calls by default, with enterprise options available for scaling.
Vogent: Also compliant with major standards and offers scalable solutions tailored to enterprise needs, ensuring high availability and reliability.
The Verdict
Retell AI is a solid choice for developers seeking a flexible, API-driven platform with essential features for building voice agents. However, Vogent stands out with its comprehensive ecosystem, offering advanced capabilities like self-improving agents, ultra-realistic voices, and seamless scalability. For organizations aiming to lead in the voice AI space, Vogent provides a more versatile and forward-thinking solution.
Ready to explore what Vogent can do for your business? Sign up for a free trial or book a demo today.