Retell AI Reviews & Product Details

Retell AI is a powerful conversational AI platform designed to automate voice, SMS, and chat interactions with natural, humanlike performance. Built on top of your choice of large language models (LLMs), Retell allows teams to spin up real-time AI agents that handle calls, trigger messaging workflows, and integrate seamlessly into your existing systems—all without writing code. At its core, Retell delivers Voice Agent Automation that feels indistinguishable from speaking with a real person. Calls are handled by LLM-native agents that respond within 600 milliseconds, support multi-turn logic, and operate across 31+ languages with native-quality speech. You can build and manage your own agent flows using an intuitive drag-and-drop builder that supports IVR trees, dynamic transfers, real-time webhooks, and CRM integration. Whether you’re scheduling appointments, answering FAQs, or qualifying leads, these agents are fast, reliable, and production-ready. Beyond voice, Retell also enables SMS and chat automation. Agents can send contextual messages during or after phone calls, or operate as standalone text/chat bots. You can use Twilio numbers or bring your own for outbound campaigns, enabling flexible, multi-channel engagement. To ensure quality and insight, Retell offers built-in testing and QA tools. You can simulate conversations, A/B test call flows, and monitor live call data through detailed dashboards. Track CSAT, latency, sentiment, and conversation outcomes—all in one place. Voice agents can be deployed via Twilio, SIP, branded caller ID, or embedded using Retell’s web SDKs. Unlike legacy IVR or scripted systems, Retell is built from the ground up to be AI-native and fully customizable. Whether you’re in healthcare, logistics, fintech, or customer support, Retell’s platform lets you scale personalized conversations across channels—boosting customer satisfaction and reducing operational costs.

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Retell AI

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Retell AI Community

Languages Supported

Bulgarian, Catalan, Danish, German, Greek, English, Finnish, French, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Dutch, Norwegian, Polish, Portuguese, Romanian, Russian, Slovak, Spanish, Swedish, Thai, Turkish, Vietnamese, Chinese (Simplified)

Overview by

Bing Wu

Pricing

Pricing provided by Retell AI.

Pay as you go

$0.07

1 Minute

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Retell AI AI Agent Performance

Explore real-world performance insights that show how Retell AI's agentic features compare to AI agents with similar capabilities.

Overall

-2 below category avg

Pros

Cons

62 Safety Score

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Retell AI Media

Retell AI Demo - Agent Building Overview

Quickly build, customize, and refine Al voice agents for call center operations with LLM-native technology.

Simulate, monitor, and refine Al voice agents before full deployment.

Connect your agent to your telephony, website, and multiple channels with ease.

Retell AI Demo - Monitoring the Agent's Performance

Track, analyze, and improve your Al agent using real-time metrics and intelligent recommendations.

Retell AI Demo - Ecosystem & Integrations

Seamlessly integrate into your tech stack

Interactive Demo

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Verified User in Information Technology and Services

3/17/2026

4.5/5

Verified User in Information Technology and Services

3/15/2026

"very useful platform for AI vocal agents"

5/5

What do you like best about Retell AI?

The latency is incredibly low, which is the most critical factor for a natural-sounding voice agent. I love how easily it integrates with existing LLMs and the flexibility provided by the API for handling complex call flows and custom tools. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

While the documentation is generally good, I’d like to see more advanced examples for handling edge cases in multi-turn conversations. Additionally, the cost per minute can scale quickly for high-volume outbound campaigns. Review collected by and hosted on G2.com.

What problems is Retell AI solving and how is that benefiting you?

Retell AI eliminates the high latency and "robotic" delays that typically plague voice bots, allowing for natural, real-time conversations that feel truly human. By automating high-volume outbound and inbound calls with sub-800ms response times and intelligent interruption handling, it solves the challenge of scaling customer operations without increasing headcount or sacrificing lead quality. For me, this translates to significant cost savings, 24/7 availability for my customers, and perfectly structured data syncing directly to my CRM after every interaction. Review collected by and hosted on G2.com.

Verified User in Consumer Services

3/14/2026

"Exceptional Low-Latency Voice AI for Building Conversational Sales Agents"

5/5

What do you like best about Retell AI?

Retell AI provides incredibly realistic, low-latency conversational models that make deploying automated sales and lead follow-up agents seamless. The API is robust and integrates perfectly with complex backend workflows and custom automation setups. Setting up custom SIP trunks for routing calls is highly reliable, allowing for scalable deployment of outbound cart recovery agents and inbound qualification bots. The interruption handling and natural conversational pacing make the agents sound distinctly human, which is crucial for maintaining high engagement rates on cold or warm calls. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

While the platform is incredibly powerful, the documentation for highly complex, edge-case SIP configurations or ultra-specific prompt tuning could be a bit more fleshed out. Additionally, scaling up massive concurrent batch calling campaigns requires careful budget monitoring, though the ROI from the recovered leads generally justifies the cost. Review collected by and hosted on G2.com.

What problems is Retell AI solving and how is that benefiting you?

It completely automates the top of the sales funnel and customer follow-up. Instead of relying on manual dialers to chase down leads or abandoned carts, voice AI agents handle immediate outreach, answer initial FAQs, and qualify prospects in real-time. This ensures zero drop-off, handles scale effortlessly, and successfully books high-intent appointments directly onto the calendar without human intervention. Review collected by and hosted on G2.com.

Verified User in Human Resources

3/13/2026

"Easy to use, reliable"

5/5

What do you like best about Retell AI?

Retell AI is very fast so there are no long silences during a call. It feels like a real person because it stops talking right away if the customer interrupts. You can connect it to your other tools easily with their clear instructions. The system is very strong and does not crash when many people call at the same time. This makes it perfect for local businesses that cannot afford to miss a single lead. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

The pricing is hard to understand because you have to pay different fees for the phone line and the AI. It is difficult for a normal person to set up because you need to know how to code to make it work well. If you have a problem, it can take a long time to get an answer from their support team. You also have to pay the full price even when you are just testing the system to see if it works. Review collected by and hosted on G2.com.

What problems is Retell AI solving and how is that benefiting you?

Retell AI stops you from losing money when you cannot answer the phone. It answers every call immediately so your customers do not go to a competitor. This helps you prove that your service works during a 7-day pilot. It also saves you time by taking notes and filling out your calendar automatically. Review collected by and hosted on G2.com.

Verified User in Construction

3/13/2026

"its an amazing product, good job retell team"

5/5

What do you like best about Retell AI?

Incredible Realism and Low Latency: The sub-second response times make conversations feel incredibly natural. The voices avoid those awkward robotic pauses, and the system handles "barge-ins" beautifully—meaning if a caller interrupts mid-sentence, the agent gracefully stops and listens just like a real human would.

Developer-Focused Flexibility: It doesn't box you in with rigid constraints. You get the raw building blocks—like webhooks, custom LLM integrations, and robust APIs—giving you complete freedom to design exactly how the agent behaves and seamlessly tie it into custom backends.

Production-Ready Reliability: It is built to scale effortlessly. Knowing the infrastructure can handle high-volume concurrent calls while providing built-in compliance (HIPAA, SOC 2, GDPR) and detailed post-call analytics takes a massive load off the engineering and deployment process. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

The Rewarding Learning Curve: Because it is so robust and developer-centric, it skips the simplistic no-code visual builders. You really have to roll up your sleeves and write code to unlock its full potential. While it takes a bit more time to map out complex, multi-language flows, the exciting trade-off is that you get absolute, fine-grained control over the final product!

Modular Pricing Structure: The billing is layered, meaning you pay for the base minutes plus the specific LLM, speech-to-text, and voice engines you choose to plug in. While it makes forecasting exact monthly costs a bit of a mathematical puzzle at first, it is actually a huge plus because it ensures you are only ever paying for the exact, top-tier components you want to use. Review collected by and hosted on G2.com.

What problems is Retell AI solving and how is that benefiting you?

Building a voice AI from scratch is notoriously difficult because you have to string together several complex systems—Speech-to-Text (ASR), the "brain" (LLM), and Text-to-Speech (TTS)—while dealing with the messy reality of live audio. Retell AI steps in to solve these heavy-lifting infrastructure problems:

The Latency Problem: In a traditional, pieced-together API chain, processing audio to text, generating an AI response, and converting it back to audio takes several seconds. Retell optimizes this entire pipeline to achieve sub-second latency, eliminating the awkward silences that ruin the illusion of a real conversation.

The "Turn-Taking" Problem: Humans interrupt each other, use filler words, and pause to think. Retell AI handles "barge-ins" natively. It knows exactly when to endpoint (stop listening and start generating) and instantly stops talking if a user interrupts, rather than stubbornly talking over them.

The Orchestration Problem: Instead of forcing developers to manually manage raw audio WebSockets, telephony SIP trunks, and three different AI provider APIs simultaneously, it wraps the entire complex voice orchestration stack into a single, unified platform.

How That Benefits Me

Honestly, it completely changes the game for development. By offloading the raw infrastructure and audio processing to Retell, here is how it directly benefits my workflow:

Laser Focus on Apex's Brain: I don't have to waste weeks writing boilerplate code just to handle audio streaming or secure telephony connections. Instead, I get to spend 100% of my time fine-tuning Apex's actual intelligence, prompt engineering, and custom backend logic to make the agent exceptionally smart.

A Truly Natural Product: Because Retell solves the latency and interruption issues so elegantly out-of-the-box, I can confidently put Apex in front of users knowing the interaction will feel fluid, professional, and remarkably human, rather than like a clunky robot.

Rapid Prototyping to Production: It allows me to take complex voice flows from a local test environment straight to a highly reliable, production-ready state in a fraction of the time. It turns what used to be a massive engineering headache into a smooth, highly scalable process! Review collected by and hosted on G2.com.

Verified User in Food Production

3/13/2026

"Outstanding AI Call Automation Platform"

5/5

What do you like best about Retell AI?

What impressed us most about Retell AI is how natural the voice conversations feel. Compared to other voice AI tools we tested, the latency is very low and the interactions feel surprisingly smooth. The API is flexible and makes it possible to integrate AI calling into existing systems without too much complexity. It’s a powerful platform if you want to automate phone interactions while still maintaining a professional customer experience. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

The platform is very powerful, but because of that it can take a little time to understand all configuration options when you first start. Some additional examples and ready-made templates for common use cases would help new users get started faster. That said, once everything is set up, the system works reliably. Review collected by and hosted on G2.com.

What problems is Retell AI solving and how is that benefiting you?

Handling incoming calls manually can quickly become a bottleneck, especially during busy periods. Retell AI helps us automate routine phone interactions so that customers still receive immediate responses without needing a human agent for every call. This reduces operational workload and ensures calls are handled consistently, even outside business hours. As a result, our team can focus on more complex customer requests instead of repetitive phone tasks. Review collected by and hosted on G2.com.

Verified User in Marketing and Advertising

3/12/2026

"Finally, a simplified voice AI platform that actually works in production"

5/5

What do you like best about Retell AI?

The reliability in production. We build outbound voice AI agents for clients and Retell is the first platform we've trusted enough to put in front of real leads at scale. Calls handle interruptions naturally, recover from unexpected responses without breaking, and the post-call analysis returns structured data (booked status, objections, extracted variables) that hits the CRM automatically via webhook. The ElevenLabs voice integration is seamless and the whole stack, from LLM config to live calls, took less than a day to deploy. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

The documentation could go deeper on edge cases and the dashboard analytics could be more prominent. Call performance data is there but you have to dig for it. Neither is a big deal, just areas with room to grow. Review collected by and hosted on G2.com.

Verified User in Computer Hardware

3/12/2026

"Easy to set up"

4.5/5

What do you like best about Retell AI?

What I like most about Retell AI is its flexibility for building serious voice agents beyond simple prompt-based bots. The platform gives good control over call behavior, speech settings, custom LLM integrations, and structured conversation flows. I also like that it supports advanced use cases like multilingual assistants, external tools, and custom backend logic, which makes it useful for real production scenarios rather than only demos. The interface is modern, testing is convenient, and it is clear that the product is built for developers and teams who want more control over the voice stack. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

The biggest downside is that setup can become confusing once you move beyond the basic use case. Some configuration areas, especially around custom LLMs, voices, transcription, and function/tool behavior, are not always intuitive, and it can take time to understand how everything fits together. There is a noticeable learning curve for advanced integrations, and debugging complex voice flows or backend-connected agents can be harder than it should be. I would also like clearer documentation and more step-by-step guidance for production-style setups, especially when combining multilingual transcription, custom backends, and external voice providers. Review collected by and hosted on G2.com.

What problems is Retell AI solving and how is that benefiting you?

Retell AI solves the problem of turning voice AI ideas into something that can actually be tested and deployed in real phone-call scenarios. Instead of building the entire telephony, speech, and voice orchestration stack from scratch, I can focus on my backend logic, business workflows, and conversation design. That saves development time and makes it much easier to test live call experiences, multilingual voice interactions, and structured call flows. It benefits me by speeding up prototyping, reducing infrastructure complexity, and giving me a practical environment to connect voice agents with my own backend systems. Review collected by and hosted on G2.com.

Verified User in Real Estate

3/11/2026

Business partner of the seller or seller's competitor, not included in G2 scores.

"What problems does Retell AI solve"

5/5

What do you like best about Retell AI?

What I like most about Retell AI is how easy it is to build production-ready voice AI agents that can handle real phone calls. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

One area that could improve is providing more built-in templates and guided setup for common business use cases like real estate, healthcare, and customer support. While the platform is powerful, new users may need some time to understand the best way to structure prompts, call flows, and webhook integrations.

It would also be helpful to have more native integrations with popular CRMs and automation tools. Currently these integrations are possible through webhooks, which works well, but direct integrations could make onboarding even easier for non-technical users.

Overall these are minor improvements and the platform is already very capable for building voice AI solutions. Review collected by and hosted on G2.com.

What problems is Retell AI solving and how is that benefiting you?

Retell AI is helping automate inbound and outbound phone conversations for businesses. Instead of missing calls or manually handling every inquiry, we can deploy AI voice agents that answer calls instantly, qualify potential customers, and capture lead information automatically.

This benefits our workflow because every call can be processed, summarized, Review collected by and hosted on G2.com.

Micah K.

Owner/manager

Small-Business (50 or fewer emp.)

3/8/2026

"Retell is super user friendly"

5/5

What do you like best about Retell AI?

What I like best about Retell AI is how quickly you can go from an idea to a fully working AI phone agent that actually sounds natural on real calls. The platform makes it easy to build AI receptionists that can answer questions, qualify leads, and book appointments without needing a huge engineering setup. I also like how flexible it is with integrations, so you can connect it to CRMs, booking systems, and other tools businesses already use. That makes it practical for real deployments instead of just demos. Overall, it feels built for people who want to ship AI voice agents that businesses can actually rely on. Review collected by and hosted on G2.com.

What do you dislike about Retell AI?

One downside I’ve noticed with Retell AI is that the native scheduling integration is mainly built around Cal.com. While Cal.com works well, many businesses already use other booking platforms, so it would be great if there were more built-in integrations for different scheduling tools to make it easier to fit into existing workflows. Review collected by and hosted on G2.com.