Retell AI

Build human-like voice AI agents in a day

Paid

Retell AI Overview

What is Retell AI?

Retell AI assists developers in creating advanced conversational Voice AI that mimics human interactions. The tool is equipped to execute complex tasks, follow instructions, and can integrate with any Language-Level Models (LLMs). With Retell AI, developers can build, test, deploy, and monitor their voice AI agents at scale. In addition to these, the platform provides an array of features such as pre-built templates, stateful multi-prompt agents, and single-prompt agents allowing for the testing and deployment of complex workflows with relative ease. But, what sets Retell AI apart is its proprietary turn-taking model which powers an interactive conversation experience that enables AI to effectively handle interruptions. The platform also offers post-call analysis, sentiment analysis, and task completion status to assess the performance of deployed AI. In summary, Retell AI provides a robust and flexible environment for the creation and deployment of human-like voice AIs adaptable to diverse use cases. Help other people by letting them know if this AI was useful. Add your own prompts and outputs to help others understand how to use this AI.

Screenshot gallery

Pros & Cons

Pros

Can execute complex tasks
Can follow instructions
Integrates with any LLMs
Build, test, deploy, monitor at scale
Stateful Multi-Prompt Agents
Single-Prompt Agents
Enables testing and deployment of complex workflows
Proprietary turn-taking model
Handles interruptions effectively
Post-call analysis
Sentiment analysis
Task completion status monitoring
Flexible and robust environment
Near real-time interaction
Mimics human interactions
Completes tasks in a day
Interactive conversation experience
Multi-lingual support
HIPAA compliance work in progress
SOC Type II certification in progress
Telephony integration: Twilio, Vonage, SIP
Can be deployed anywhere
End-of-turn detection feature
Interruptibility feature
Voice cloning support
800ms response time
Human-like voices
Web App and Mobile deployment
Engaging and lifelike voices
Comprehensive Agent Testing
Backed by Y Combinator
Latency tracking
Stable voice service
Effortlessly scale call volume
Voice agents interact like humans
Supports interaction with agent while testing
Ability to save test cases for future use
Open source Client SDK

Cons

No open source access
Limited language support
800ms Latency
Requires LLM integration
Limited template variety
Proprietary turn-taking model
Unclear pricing model
May not handle unique interruptions
SOC Type II certification WIP

A Professional Framework to Evaluate Retell AI

When considering Retell AI for integration into your organizational workflow, we recommend deploying a structured score card across three critical operational pillars: Security & Compliance, Integration Friction, and long-term Price Scalability. Rather than looking only at basic feature lists, modern procurement teams must assess how a software platform behaves under high load and how well it fits into the team's data security guidelines.

1. Security and Database Compliance

Depending on your operating region and field, ensure that Retell AI supports standard security layers such as SOC 2 Type II certifications, GDPR compliance, or HIPAA-compliant database encryption. If the tool connects directly to client database tables or handles user passwords, verify that they implement multi-factor authentication (MFA), single sign-on (SSO) integrations, and end-to-end data encryption in transit and at rest.

2. API Coverage and Custom Integrations

Siloed data is the primary cause of operational friction. Evaluate if Retell AI has native connectors for your current project trackers, messaging hubs, and customer communication channels. For custom developer requirements, check if they provide a fully documented REST API with reasonable rate limits, comprehensive Webhooks support, and robust SDK packages in your language. A flexible API layer saves hundreds of hours of manual copy-paste overhead.

3. Total Cost of Ownership (TCO)

SaaS pricing packages are often deceptively simple. When reviewing Retell AI's billing structure, map out your team's projected expansion over the next 12 to 24 months. Determine how costs scale as your customer database increases or as you add team members. Factor in setup costs, mandatory support plan upgrades, API access fees, and storage overage rates to understand the true cost before committing to a contract.

By combining verified user reviews from our directory with internal workflow pilot tests, your procurement team can make an informed decision that drives productivity without creating capital waste.

Features of Retell AI

Agent
Voice AI
Conversational AI
AI Development
Turn Taking Model
AI Agents
From $0.01

SaaS1to10 verified reviews for Retell AI

Overall rating

5.0

Based on 18 reviews

5.01 weeks ago

“Review”

Works but I cannot understand what's the use. I was expecting it to give me some videos

Samartha Venkatramana

5.01 weeks ago

“Review”

After my first use, I think it's surprisingly good. The only drawback so far is the PDF export option for the report which is formatless.

Alejandro Correa

5.01 weeks ago

“Review”

As the service was in beta-testing stage, I created there a dozen of AI-generated courses for free. I wanted to use them. Those courses remained in my account as they started subscription tiers. But recently I have found out that they were deleted. The support didn't answer to my e-mail at all.

Oldfag TV

5.01 weeks ago

“Review”

It analyzes my search campaign data exceptionally well. I wouldn’t be able to find so many optimization opportunities manually. With this tool, I save 50% of my time on data analysis.

Сергей Калашников

5.01 weeks ago

“Review”

I'm usually kinda skeptical with tools that send stuff over email, but this one had the full book in my inbox in like a min. You can even pick how and what you wanna download, it has text, cover, epub, pdf. The story was an interesting read too. As a heads up though, you only get 1 free book and the max that you can go for is 10 chapters, which adds up to about 20-something pages, so basically don't expect a full novel is what I'm saying. Still really good overall.

Niraj Katy

5.01 weeks ago

“Review”

Hey Dillon, email me at bobby@revmo.ai and let’s see if we can figure out what’s going on.

Revmo

5.01 weeks ago

“Review”

Suppppeeeeerrr! Wowwww! @Mindsmith is absolutely fantastic! It is incredibly useful, easy to use, and very professional.

Claudia Scilletta

5.01 weeks ago

“Review”

superb, e gratis, merge blana, in EN se aude ideal

jon doe

5.01 weeks ago

“Review”

I tried NovelGPT a template in @Agentgpt and it did an excellent job writing the first two episodes of my novel complete with character descriptions, setting,plot points and well I think you get the point. Great tool can't wait to see it out of beta.

Kelli Crose

5.01 weeks ago

“Review”

O GPT faz uma análise melhor e mais personalizada.

Vinicius Vilela

5.01 weeks ago

“Review”

Excellent platform. Excellent documentation.

Ryan

5.01 weeks ago

“Review”

@Vocode has been a game-changer for our voicebot project! It handles real-time audio streams seamlessly and made integration with our custom ASR and TTS components easy. Can recommend for any voice AI applications!

Ulan Yisaev

5.01 weeks ago

“Review”

@CallFluent is NOT ready for commercial use. I signed up, followed their tutorials to a tee, and could not get voice bot to work. The bot would hallucinate about dates, and would actually argue with me about days dates. I tried to connect with their support, and kept getting the same replies -- to not use the web based calling feature. I was actually calling by phone to test the bot. Support is TONE DEAF. I sent call recordings, transcriptions, and detailed list of issues by email. They kept repeating the same answers... almost as if they use their own garbage AI for tech support. I requested a ZOOM call with their "onboarding specialist" and was given access to a calendar, with the soonest appointment 8 days away. I requested a sooner appointment and the specialist started offering me times IN THE PAST. Again, I think they use their own AI for support or scheduling. I would stay away from this product. Not very good at all. Avoid at all costs if you wish to have a successful AI chat and voice bot.

Sherm Stevens

5.01 weeks ago

“Review”

filters my spam calls

Robin Haw

5.03 weeks ago

“Review”

Fantastic tool. Compared to Vapi in terms of voice quality and built-in setup, it’s outstanding.

Soban Ajmal

5.03 weeks ago

“Review”

been using @Retell AI for last year.... Built over 50 voice agents for mysel and clients.... easy to use ...

zehaan khan

5.03 weeks ago

“Review”

If calls are handled but not converting better than humans, you’re burning cost at scale -> ~20–30% pipeline leak. Are your agents outperforming human conversion rates?

Paul

5.03 weeks ago