Retell AI
Create lifelike AI voice agents, deploy anywhere, analyze real-time.
Watch Retell AI in Action
Key Takeaways
- What it is
- Create lifelike AI voice agents, deploy anywhere, analyze real-time.
- Pricing
- $0.07-$0.31/minute for AI Voice Agents; $0.002+/message for AI Chat Agents
- Best for
- Advanced Voice AI
- Pre-built Templates
- Stateful Multi-prompt Agent
- Rating
- 4.6/5
What is Retell AI?
Retell is a cutting-edge platform designed to create, deploy, and manage AI voice agents with human-like interaction capabilities. This tool stands at the forefront of voice AI technology, enabling users to build voice agents that can perform complex tasks, follow detailed instructions, and integrate seamlessly anywhere. Retell is not just a tool; it's a gateway to revolutionizing how businesses and individuals interact with their audience through voice. Whether it's through phone calls, web calls, or any other medium, Retell ensures that the voice agents created are as engaging and lifelike as possible.
Retell distinguishes itself with its proprietary Turn-Taking model and the ability to support conversational back-channeling, providing near real-time interaction with an impressive 800ms latency. This technology not only enables more natural and fluid conversations with AI but also allows users to interrupt, making it one of the most human-like voice AI platforms available.
Retell is a game-changer in the realm of voice AI, offering unparalleled human-like interactions through its advanced voice agents. Its unique features, including the proprietary Turn-Taking model and near real-time interaction capabilities, set it apart in the industry. With its flexibility, scalability, and compliance with privacy standards, Retell is an essential tool for businesses looking to enhance their user interaction through voice technology. Whether for customer service, scheduling, or interactive marketing campaigns, Retell provides a powerful platform to build, test, deploy, and monitor AI voice agents at scale.
Who is Using Retell AI?
E-commerce Businesses
For providing customer service through voice interaction.
Healthcare Providers
To schedule appointments and handle inquiries via automated voice agents.
Tech Companies
Utilizing AI voice agents for user support and engagement.
Marketing Agencies
To create unique voice-based campaigns.
Uncommon Use Cases
Educational institutions using voice agents for interactive learning; Event organizers for managing RSVPs and inquiries.
Key Features
Rating Breakdown
Pricing Plans
Pay as you go
$0.07-$0.31/minute for AI Voice Agents; $0.002+/message for AI Chat Agents
- Full Platform Access
- Pre-built Agent Templates
- Call Analytics and Transcripts
- Simulation Testing
- Webhooks and API Access
- 20 Free Concurrent Calls
- Community and Email Support
Enterprise Plan
- Dedicated Implementation Support (add-on)
- Custom MSA/DPA terms
- Role-based Access Control
- Dedicated Stable Server
- Custom SSO
- High Cap on Concurrent Calls
- 24/7 Omnichannel Support with Dedicated Portal
Which Retell AI plan should you pick?
Start with Pay as you go for testing and usage-based deployment; upgrade to Enterprise when you need dedicated infrastructure, unlimited concurrency, SSO, or premium support.
Pay as you go
Good for developers and businesses that need full platform access, usage-based billing, API access, templates, analytics, and up to 20 concurrent calls included.
Enterprise
Good for organizations that need custom pricing, dedicated infrastructure, higher or unlimited concurrency, SSO, compliance terms, and dedicated implementation or support.
Retell AI Use Cases
Healthcare appointment scheduling
The voice agent answers patient calls, books or reschedules appointments, verifies insurance, and triages urgent requests.
Outcome: More appointments handled with less front-desk phone workload.
Lead qualification
The agent calls prospects, conducts qualification conversations, determines interest, and routes qualified leads to representatives.
Outcome: Sales teams spend more time closing instead of screening.
Customer support
The agent answers routine customer questions from a knowledge base and escalates complex cases with call context.
Outcome: Routine requests are resolved quickly while difficult cases reach human staff with context.
AI receptionist
The agent answers inbound calls, captures caller intent, routes requests, books appointments, and provides information.
Outcome: Calls are handled continuously without requiring additional reception staff.
Outbound calling campaigns
The agent dials contact lists, delivers scripted or conversational outreach, qualifies prospects, and books meetings.
Outcome: Large outbound campaigns run without manually placing every call.
Workflow Ideas with Retell AI
Inbound CRM-assisted call
- 1Receive an inbound call
- 2Look up the caller in Salesforce or another connected CRM
- 3Greet the caller with relevant account context and update the record after the call
Lead qualification and Slack alert
- 1Trigger a Retell call from a new lead or form submission
- 2Qualify the lead during the conversation
- 3Write the outcome to a CRM or spreadsheet and alert Slack when qualified
Healthcare appointment workflow
- 1Answer a patient call using the configured knowledge base
- 2Check calendar availability and book or reschedule an appointment
- 3Transfer urgent cases to staff with the transcript and call context
How Retell AI fits into your stack
Telephony Integration
Seamless integration with Twilio, Vonage, and SIP for broad telephony deployment.
Multilingual Support
Offers support for over 7 languages, making it versatile for global applications.
HIPAA Compliance
Ensures secure handling of sensitive healthcare information.
API Access
Enables custom development and integration into existing systems.
Pros
- +Human-like Interaction: Offers engaging and lifelike voices with support for multiple languages, enhancing user experience.
- +Rapid Development: Enables the building and testing of complex workflows within minutes, significantly reducing development time.
- +High Scalability: Effortlessly scales call volume, making it suitable for businesses of any size.
- +Data Privacy and Security: Complies with HIPAA regulations, ensuring user data is handled securely.
Cons
- −Learning Curve: New users may require some time to fully grasp the extensive functionalities and best practices for creating effective voice agents.
- −Integration Limitations: While it supports major telephony systems, integration with other third-party platforms may be limited.
- −Early Stage: As a relatively new entrant, some features are in continuous development, which may affect early adopters seeking stability.
Limitations & when to consider alternatives
Known limitations
- Knowledge-base file limits. Each knowledge base supports up to 25 files, with each file limited to 50 MB.
- Knowledge-base spreadsheet limits. CSV, TSV, XLS, and XLSX sources are limited to 1,000 rows and 50 columns per file.
- Knowledge-base URL limits. A knowledge base supports up to 500 URLs and up to 500 exclusion URLs.
- Chat agents lack some voice functions. Chat agents do not support call transfers, DTMF input, or other telephony-specific functions.
- Native SMS and chat integrations. Retell documents that chat agents are accessed through its API and do not have native integrations with SMS or chat applications.
Look elsewhere when
- You need a native iOS or Android app.
- You need native SMS or chat application integrations.
How to Use Retell AI
- 1
Explore comprehensive tutorials on the Retell documentation page, covering everything from basic setup to advanced agent customization and deployment strategies.
Who is Retell AI For?
Healthcare providers
Retell names healthcare as a target industry for scheduling, intake, reminders, insurance questions, and triage.
Call centers and dialer teams
Retell supports inbound support, outbound sales, automated dialing, qualification, transfers, and call monitoring.
Sales and operations teams
Retell targets teams that need automated lead qualification, outreach, appointment booking, and CRM updates.
Reception and answering services
Retell provides AI receptionists and answering agents for routing calls, handling inquiries, and scheduling appointments.
Developers and engineering teams
Retell provides APIs, SDKs, webhooks, custom functions, and telephony integrations for teams building voice agents.
Frequently Asked Questions
How does Retell AI pricing work?
Retell uses pay-as-you-go pricing. Voice agents are charged per minute, while chat agents are charged per AI message.
How much free usage is included?
The pay-as-you-go offering starts at $0 and includes free credits or free minutes, depending on the current pricing presentation.
Can Retell AI use existing phone numbers?
Yes. You can use Retell numbers, import numbers from supported providers, or connect existing telephony through SIP.
Can Retell AI connect to business systems?
Yes. Retell documents integrations and workflows for systems including Salesforce, HubSpot, Zendesk, Slack, Google Workspace, and scheduling tools.
Can Retell AI agents support multiple languages?
Yes. Agents can be configured for a selected language or multiple languages, subject to voice and speech-recognition support.
Can I upload documents to a Retell knowledge base?
Yes. Knowledge bases support URLs, custom text, and uploaded documents in formats such as PDF, DOCX, CSV, XLSX, and TXT.
Community reviews
Be the first to share your experience.
Sign in to leave a review for Retell AI.
Retell AI Alternatives
Looking for alternatives to Retell AI? Here are similar tools in the same category:
Learn to Master Retell AI
With Skill Leap courses
Get in-depth training on Retell AI and 50+ other AI tools with our expert-led video courses.
Start 7-Day Free Trial