As businesses increasingly pivot call operations to AI voice agents to streamline customer interactions, choosing the right AI call platform becomes critical. While both Retell AI and Vapi AI offer AI phone agent solutions, they cater to drastically different user bases and subsequently business needs. Let's explore the key differences between the platforms to help you decide the best option for your business.
Key Features
The Pricing Comparison
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Scalability & Reliability
Key Differences
Low Code vs. Developer Focused
One of the biggest distinctions between Retell AI and Vapi AI is accessibility. Vapi, being API first, centers their platform on being massively customizable through the necessity of developing most aspects of your AI phone agent and its processes through code. Most features and APIs must be coded by a developer to be integrated or be connected through third party integrations. There are hardly any templates or frameworks to make and deploy agents quickly.Ā
On the other hand, Retell has built its platform with the same customizability in mind, yet with a higher emphasis on ease of use, scalability, and deployment. Within the agent builder there exists template, feature, and integration options that allow for users to easily access the tools they need to make their highly personalized phone agents. Retell AI offers pre-built functions in the form of integrations, helping you build your voice agents that much faster. Check out our most popular integration with Cal.com here to see the full power and ease of Retell integrations.
While code is a must for any complex and specialized voice agents, removing the majority of the code bottleneck allows agents to be built in as fast as 5 minutes!
The key when navigating the choice between a code heavy solution like Vapi and a code optional solution like Retell is having a deep understanding and reflection on your businessā needs. If your business requires a hyper customized AI voice agent solution then a platform code heavy platform will be the tool to use, but if time and resources are limited, which it is for most, an all-in-one solution with large support for customization may be the right choice for you.
Overall:
Retell AI
Designed for both technical and non-technical users
Easy to use drag-and-drop interfaceĀ
Highly customizable
Quick deployment and scalability without requiring extensive coding knowledge
Vapi AI
API-first, developer-focused platform thatĀ
Requires custom coding and 3rd party integration
Less accessible for teams without dedicated engineering resources
Conversational AI & Voice Capabilities
AI voice agents should sound as human as possible right out of the box. Callers and recipients to calls want to hear a human not a robot, and furthermore they need the agent they are speaking with to understand their needs and act on them, just like human agents do. A platform that offers these key capabilities in their agents is imperative to maintaining and retaining trust, customer satisfaction, and efficient workflows in your outbound and inbound call operations.
Vapi AI, while being highly customizable, offers limited support for agent optimization, lacking key features like context retention between transfers and voice option upgrades hidden behind paywalls. These features leave Vapi AI phone agents sounding less human and less capable to assist and execute on complex functions.Ā
Additionally, Vapiās complex and overwhelming user interface is a significant pain point for beginners and developers alike. Vapi users often report feeling frustration from attempting to build their businessā voice agents due to the amount of confusing settings and functions. You shouldnāt need to translate hieroglyphics to build an AI phone agent, with a simpler and easier solution built to shatter your potential bottlenecks: Retell AI.
Retell AI provides advanced conversational AI with live context retention, ensuring that voice agents remember previous interactions within a call, making conversations feel more human and natural. Enhanced with key features such as webhooks, warm transfers, and IVR navigation, Retellās agents are highly capable and more than equipped to handle simple and complex conversations and tasks. Additionally, Retell AI supports pre-trained AI voices optimized for conversation depth and sounding natural, so no matter how simple or complex the demands of your voice agents are, Retellās agents will handle them with the sound of natural human speech.
Overall:
Retell AI
Advanced conversational AIĀ
Capabilities like live context retention, ensuring that voice agents remember previous interactions within a call
Natural human sound and speech
Highly capable to understand and act in complex interactions
Vapi AIĀ
Limited support for agent optimization,
Lacks robust memory capabilities and context retention
more suitable for one-off, simple interactions rather than complex customer service or sales workflows.
Pricing & Cost Efficiency
Cutting edge technology shouldnāt come at cutting edge prices. Vapi being reliant on APIs, charges an additional cost per minute, per API. That means youāll be paying an additional cost for the model, transcriber, voice, and telephony on top of the $.05/min it already costs to use the platform. This ultimately makes the price unpredictable from the beginning and due to needing a developer to make functional AI phone agents, Vapi may become very cost inefficient overtime.
Retell AI, priding itself on providing a cutting edge all in one solution, recognizes that not all users need all the features, so the pricing model is modular. There are extra features and functionalities such as Branded ID Calling that businesses can choose to add to their plan. With a transparent and straightforward pricing model starting at $.07/minute, your business can have everything it needs and nothing it doesnāt at an accessible rate. ā
Retell AI: The All-In-One SolutionĀ
Retell AI deliversthe all-in-one solution to businesses looking for an easy to use, hyper scalable AI phone agent solution that deploys faster than most other platforms.
Understanding and wanting to always deliver for our users we provide additional functionalities that enhance the entire call experience. Hereās what truly makes Retell AI stand out against Vapi AI:
More Features
Warm Transfers - Seamlessly transfer calls to human agents when necessary (Not supported in Vapi AI).
Post-Call Analysis - Gain valuable insights from conversations with custom call analysis categories (Limited in Vapi AI).
Webhooks for Real-Time Integrations - Automate workflows and sync call data with external platforms instantly.
DTMF & IVR Navigation - Capture digit-based user inputs and navigate complex interactive voice response (IVR) menus effortlessly.
Enterprise-Grade Call Handling & Telephony Features
For businesses that require scalable AI-powered calling, Retell AI outperforms Vapi AI with robust telephony and call management capabilities:
Supports both inbound and outbound calling, including SIP trunking integrations (Twilio, RingCentral, etc.).
Batch Calling - Run high-volume outbound call campaigns efficiently (a feature Vapi AI lacks).
Branded Caller ID & Verified Phone Numbers - Prevents calls from being marked as spam, improving answer rates (Not supported in Vapi AI).
Call Data, Analytics, and CRM Integrations
Retell AI provides detailed insights and analytics that help businesses refine their AI phone agent interactions over time.
Vapi AI offers generic reporting tools, requiring additional development to customize insights.
Moreover, Retell AI integrates seamlessly with major CRMs like Salesforce and HubSpot, allowing businesses to manage customer interactions without complex API work.
The Verdict
While Vapi AI provides a solid developer-first approach, Retell AI is the clear choice for businesses looking for an intuitive, scalable, and feature-rich AI phone agent platform. With superior ability to build complex agents that are fully equipped to execute all the functions of a human agent and more at record speeds, all while being nearly as customizable as the competition, Retell AI is a clear choice for most businesses looking to supercharge their outbound and inbound calling at scale.Ā
Use Retell AIās most cutting edge all-in-one AI phone agent solution for free here!
For enterprise solutions contact sales to book demo.
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ROI Result
2,000
Total Human Agent Cost
$5,000
/month
AI Agent Cost
$3,000
/month
Estimated Savings
$2,000
/month
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Bing Wu
Co-founder & CEO
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