# Retell AI Reviews **Vendor:** Retell AI **Category:** [AI Agents For Business Operations](https://www.g2.com/categories/ai-agents-for-business-operations) **Average Rating:** 4.8/5.0 **Total Reviews:** 2,335 ## About Retell AI 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. ## Retell AI Pros & Cons **What users like:** - Users praise the **ease of use** in setting up prompts and integrating with other applications effortlessly. (494 reviews) - Users appreciate the **ease of use** of Retell AI, praising its smooth interface and natural voice quality. (144 reviews) - Users appreciate the **ease of use** of Retell AI, finding the interface straightforward and quick to learn. (142 reviews) - Users value the **seamless integrations** that simplify workflow creation and connect with other applications effortlessly. (119 reviews) - Users value Retell AI's **simple setup** and clean UI, making it accessible for both beginners and professionals. (112 reviews) - Users appreciate the **easy integrations** of Retell AI, which enhance automation and customization with third-party voice providers. (99 reviews) - Users find the **setup process incredibly easy** and user-friendly, enhancing the overall experience with Retell AI. (95 reviews) - Customizability (90 reviews) - Efficiency (82 reviews) - Easy Setup (75 reviews) **What users dislike:** - Users desire more **missing features** , such as diverse voices and additional CRM integrations in Retell AI. (116 reviews) - Users find the **cost per call** to be high, especially compared to alternatives like Assistable.AI. (87 reviews) - Users find the **learning curve steep** , making initial navigation and understanding of features quite challenging. (80 reviews) - Users feel the **limited features** of Retell AI hinder functionality and complicate workflow management. (66 reviews) - Users often experience **poor understanding** from Retell AI, leading to ineffective handling of varied conversation scenarios. (64 reviews) - Inaccuracy (58 reviews) - Users experience **integration issues** with Retell AI, particularly with third-party tools and SMS setups being complicated. (49 reviews) - Complexity (40 reviews) - Limited Language Support (40 reviews) - Users wish for more **customization options** , particularly to enhance the male voice features in Retell AI. (37 reviews) ## Retell AI Reviews ### 1. Polished UX for Building Autonomous AI Call Agents with Twilio & Telnyx Integrations **Rating:** 5.0/5.0 stars **Reviewed by:** Rishav K. | AI Engineer, Mid-Market (51-1000 emp.) **Reviewed Date:** April 30, 2026 **What do you like best about Retell AI?** It’s fairly straightforward to build an autonomous AI phone-call agent, including real-time function calling and call transfers. I’m also impressed by the flow-building UX; it feels polished and easy to work with, especially thanks to features like batch calling and integrations with Twilio and Telnyx. **What do you dislike about Retell AI?** So far, I haven’t disliked anything about it. It has great features, and for me it’s been working well. **What problems is Retell AI solving and how is that benefiting you?** Retell AI is solving some of the key edge problems in voice AI, such as latency, unnatural pauses, and low reliability. Since we use calling agents for several use cases, it works great for us. Now it feels like we’re talking to a real human sitting behind the call, not a bot. Also, with the use of voice mapping, it’s easier to sound like a real person based on different geographic locations and the tones people use there. ### 2. Excelent tool **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Consumer Services **Reviewed Date:** May 28, 2026 **What do you like best about Retell AI?** Retell AI makes it incredibly easy to build and deploy conversational voice agents. The function calling system integrates seamlessly with external tools like n8n and Airtable, allowing complex workflows such as appointment booking, caller identification, and lead management to work in real time during calls. The test interface directly in the browser is a great time saver. **What do you dislike about Retell AI?** he documentation for connecting third-party phone providers via SIP trunking could be more detailed, especially for beginners. Some advanced configuration steps require prior knowledge of SIP protocols. A more guided setup wizard for Twilio integration would be a great improvement. **What problems is Retell AI solving and how is that benefiting you?** We are building an AI receptionist for a dental clinic that handles appointment booking, cancellations, and rescheduling automatically via phone. Retell AI allows us to replace missed calls and after-hours inquiries with a 24/7 voice agent that sounds natural and integrates directly with our calendar and CRM. This saves significant time for the clinic staff and improves the patient experience. ### 3. Powerful AI Voice Infrastructure for Fleet Operations **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Automotive **Reviewed Date:** May 27, 2026 **What do you like best about Retell AI?** What we like most about Retell AI is the speed of implementation and the flexibility to build enterprise-grade AI voice agents. The platform makes it easy to create scalable customer service, collections, roadside assistance, and operational workflows with low latency and natural conversations. We also value the API-first approach and how easily it integrates into existing business systems and omnichannel environments **What do you dislike about Retell AI?** One area that could improve is the onboarding documentation for more advanced enterprise use cases. As we scale more complex AI operational workflows, having additional examples for large-scale integrations, analytics, monitoring, and multi-channel orchestration would make adoption even faster for enterprise teams **What problems is Retell AI solving and how is that benefiting you?** Retell AI is helping us automate high-volume customer interactions across fleet management, leasing operations, maintenance coordination, roadside assistance, and collections workflows. It reduces operational response times, improves customer service availability, and helps our teams scale support operations without increasing headcount at the same pace. The platform also enables us to centralize AI-driven voice interactions as part of a larger omnichannel strategy ### 4. RETELL AI - THE BEST **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Marketing and Advertising **Reviewed Date:** May 26, 2026 **What do you like best about Retell AI?** Unbelievable sub-second latency and human-like conversation flow I've tested several AI voice agent platforms, and Retell AI blows the competition out of the water when it comes to speed and conversational realism. The sub-second response latency completely eliminates that awkward "robotic pause" that ruins most AI calls. Callers frequently have no idea they are speaking to an AI agent because the turn-taking and interruption handling are so smooth. If you are building high-volume inbound or outbound setups, Retell is the definitive infrastructure layer to use. High reliability, great developer flexibility, and solid uptime. Highly recommended! **What do you dislike about Retell AI?** nothing at all, retell ai is that good, exceptional **What problems is Retell AI solving and how is that benefiting you?** Retell AI addresses the critical friction points of traditional voice automation and telephony engineering. Building a truly human-like voice agent used to mean stitching together a messy tech stack: a Speech-to-Text (STT) provider, a Large Language Model (LLM) orchestration layer, and a Text-to-Speech (TTS) provider—all while fighting a constant battle against audio latency and awkward conversational pacing. Retell AI serves as an enterprise-grade voice orchestration platform that solves several core structural problems. 1. The Problems Retell AI SolvesThe "Awkward Pause" (Latency Optimization)The Problem: Standard voice APIs suffer from multi-second delays while processing audio, generating text, and synthesizing a voice. In a phone call, a 2-second silence feels broken, leading to callers continually interrupting the machine or hanging up.Retell's Solution: It acts as a unified, sub-second latency engine. By handling the real-time audio streaming pipeline directly, it achieves sub-500ms response times, creating a natural back-and-forth flow. Clumsy Interruption Handling & Turn-TakingThe Problem: Most basic voice bots are rigid; they must finish speaking their entire pre-generated script before they can listen to the user again. If a human interrupts to say, "No, wait, my email changed," the bot blunders ahead blindly.Retell's Solution: Built-in conversational intelligence that supports natural "backchanneling" (nodding along with "uh-huh" or "got it") and handles sudden interruptions gracefully. The moment a human speaks, the agent stops talking and shifts context mid-sentence. Brittle Prompting & AI HallucinationsThe Problem: Relying purely on an open-ended prompt for a phone agent frequently results in the AI wandering off-script, making up fake pricing data, or getting trapped in logical loops.Retell's Solution: Features like Conversation Flows introduce a structured visual node-and-edge system. Developers can strictly constrain the paths an agent can take (e.g., Lead Gen → Qualification → Booking), enforcing predictable business logic while preserving natural language flexibility ### 5. Powerful AI Calling Platform With Serious Automation Potential **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Consulting **Reviewed Date:** May 25, 2026 **What do you like best about Retell AI?** Retell AI makes building production-ready voice agents surprisingly accessible. The platform is powerful enough for advanced automation workflows but still intuitive enough to get started without deep engineering experience. The voice quality, workflow flexibility, integrations, and ability to create realistic conversational agents for real business use cases are what stand out most. **What do you dislike about Retell AI?** The platform can have a bit of a learning curve when publishing and troubleshooting live agent behavior, especially for first-time users. Some debugging steps and audio configuration options could be clearer, and more guided setup documentation would make onboarding smoother. That said, once you understand the workflow, it becomes much easier to use effectively. **What problems is Retell AI solving and how is that benefiting you?** Retell AI solves the challenge of building reliable, human-like voice automation without needing to create an entire calling infrastructure from scratch. It removes a lot of the technical complexity involved in voice AI development and makes it much faster to launch working agents for real business use cases. This benefits me by saving development time, making experimentation easier, and allowing me to focus more on designing effective workflows and business solutions instead of spending time on backend voice engineering. ### 6. Powerful Voice AI Platform for Real Business Automation **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Information Technology and Services **Reviewed Date:** May 24, 2026 **What do you like best about Retell AI?** What I like best about Retell AI is how fast and flexible it is for building real-time voice AI agents. The call quality, latency, and conversational flow are impressive compared to many other platforms I tested. I also like how easy it is to integrate with automation tools like n8n, GoHighLevel, and OpenAI to create appointment booking and customer support systems. **What do you dislike about Retell AI?** One thing I dislike is that advanced workflows and prompt tuning can still require a lot of testing and experimentation, especially for production-ready voice agents. The pricing can also become expensive when scaling or doing many test calls during development. More beginner-friendly templates and debugging tools would also help new users. **What problems is Retell AI solving and how is that benefiting you?** Retell AI is helping solve missed calls, repetitive customer inquiries, and manual appointment scheduling for businesses. It benefits me by allowing me to build AI voice receptionists that can answer calls 24/7, handle bookings, and improve customer response times while reducing manual work. ### 7. USER FRIENDLY AND PAY AS YOU GO - THE BEST IN THE WORLD **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Automotive **Reviewed Date:** May 20, 2026 **What do you like best about Retell AI?** The pay-as-you-go pricing is the biggest win for me. As a solo founder running an AI receptionist agency in Auckland, I do not want to be locked into big monthly fees before I have proven the product to my clients. Retell lets me only pay for what my agents actually use, which keeps cashflow predictable and lowers the risk on each new build. It is also genuinely easy to use. I built my first multilingual agent (English, Mandarin, Korean) in a single weekend with no coding background. The customisation is deep too, voice speed, pause length, different voice models, custom functions for booking and transferring calls, and an attached knowledge base. Plenty of flexibility for the different industries I sell to. **What do you dislike about Retell AI?** Adding pronunciations is painful. I have to enter each word one at a time, and for businesses with NZ place names, foreign customer names, or industry jargon, it becomes a huge time sink. A bulk upload or CSV import would save hours per agent build. The other thing is the lack of a public voice example URL. I cannot link to a live demo of my agent on my website or in marketing materials without first recording a call myself, then uploading and hosting the audio. A Retell-hosted shareable audio link would make showcasing the product to prospects far easier. **What problems is Retell AI solving and how is that benefiting you?** The problem I am solving for my clients is simple: small businesses in New Zealand lose money every day because they cannot answer the phone when they are busy with customers or after hours. A real human receptionist costs $4,000 to $5,000 a month in NZ which is out of reach for most small operators. Voicemail does not cut it either, around 85 percent of callers never leave a message, they just call the next business on Google. Retell lets me build a multilingual AI receptionist that picks up every call 24/7 for a tiny fraction of that cost. My first client is a car valet business in Auckland and the AI handles bookings, takes messages, and transfers urgent calls to the owner. He no longer loses customers to missed calls during busy detailing days. For me personally, Retell removes the technical overhead of building from scratch. I can stand up a new client agent in 48 hours, attach a knowledge base, set up the booking integration with Cal.com, and connect a Twilio number. The multilingual support is also a huge win for Auckland where many small business owners deal with Chinese and Korean speaking customers daily. Without Retell I would either need a much bigger dev team or a much longer sales cycle, neither of which fits a solo founder building from zero. ### 8. It is very easy to use, click and drag and userfriendly UI they have. I would recommend to everyone. **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Consulting **Reviewed Date:** May 25, 2026 **What do you like best about Retell AI?** The modularity and ease of use. They have inbuilt phone number thing/ **What do you dislike about Retell AI?** Well there are some bugs, when I use it for building agent, the workflow was made and when i clicked a function or smth. all the workflow was gone! also there is no straight line when it comes to the pipelining. it is always a bit moved to off side, as a person who has OCD i didnt like that and it does bug me. Sometimes when i am dragging it as a pan, it directly starts to select rather than moving to change the POV. they should fix it. **What problems is Retell AI solving and how is that benefiting you?** It does save my time from coding a whole new thing, the framework and the idea is absolutely well executed, the built in phone number setting thing is what i loved the most about it. other than that it is benefiting in my college projects. ### 9. Strong Real-Time Conversational AI Solution **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Apparel & Fashion **Reviewed Date:** May 18, 2026 **What do you like best about Retell AI?** What I like most about Retell AI is the low-latency conversational performance and how easy it is to build production-ready voice agents. The call quality feels natural, the APIs are developer-friendly, and integrations with LLMs, SIP, and telephony providers are straightforward. It significantly reduces the complexity of building AI phone systems while still allowing deep customization for workflows, prompts, and call handling logic. **What do you dislike about Retell AI?** One downside of Retell AI is that advanced configurations can take time to optimize, especially for complex conversational flows and edge cases. Pricing can also become expensive at scale depending on call volume and model usage. Additionally, some areas of the documentation could be more detailed for troubleshooting and enterprise-level deployment scenarios. **What problems is Retell AI solving and how is that benefiting you?** Retell AI helps automate my business outreach by handling voice agent cold calls without needing a human team. It allows me to scale lead generation and contact more prospects in less time. This reduces manual effort and improves efficiency in sales outreach. It also lowers operational costs while keeping calling available 24/7. Overall, it helps me grow my business faster through automated and consistent cold calling. ### 10. Very intuitive and easy **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Alternative Medicine **Reviewed Date:** May 14, 2026 **What do you like best about Retell AI?** The ultra-low latency and smoothness of the conversations are impressive — patients don't realize they are talking to an AI agent. The integration with ElevenLabs for voices and compatibility with Telnyx for Swiss local numbers make deployment in a medical office truly viable. The dashboard is clean and real-time call monitoring is a real plus for the agency. **What do you dislike about Retell AI?** The documentation lacks depth on certain edge cases (handling long silences, multiple interruptions). Pricing can become high as call minutes scale. There are some sporadic bugs in detecting end of turn in French — the English language clearly remains a priority in optimizations. **What problems is Retell AI solving and how is that benefiting you?** In our agency, we use Retell AI to automate the management of incoming calls in medical offices. The central problem: medical secretaries are overwhelmed, and patients call up to 30 times before reaching someone. Retell AI allows for 24/7 response, qualifying requests, and collecting patient information before manual confirmation by the secretary. Result: fewer missed calls, better patient experience, and a real time saver for the office. For us as a reseller agency, it's a reliable infrastructure on which we can build value-added offers without managing the telephony complexity ourselves. - [View Retell AI pricing details and edition comparison](https://www.g2.com/products/retell-ai/reviews/retell-ai-review-12876618?section=pricing&secure%5Bexpires_at%5D=2026-05-31+08%3A20%3A52+-0500&secure%5Bsession_id%5D=9bd89827-1d3f-4eae-b431-a94e290f22e5&secure%5Btoken%5D=3505263a1839182c0bdba51e620cea47e2ff4aae2836489177dee034dd1b2925&format=llm_user) ## Retell AI Integrations - [Agentforce Sales (formerly Salesforce Sales Cloud)](https://www.g2.com/products/agentforce-sales-formerly-salesforce-sales-cloud/reviews) - [Asterisk](https://www.g2.com/products/asterisk/reviews) - [AWS Lambda](https://www.g2.com/products/aws-lambda/reviews) - [Azure Functions](https://www.g2.com/products/azure-functions/reviews) - [Boost.space](https://www.g2.com/products/boost-space/reviews) - [Bubble](https://www.g2.com/products/bubble/reviews) - [Calendly](https://www.g2.com/products/calendly/reviews) - 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Security Guardrails **Voice Recognition - AI Voice Assistants** - Voice Recognition **Organization** - Opportunity and Pipeline Management - Data Entry - Integrations / APIs **Platform** - Conversation Editor - Integration - Human-In-The-Loop **Autonomy - AI Agents** - Independent Decision Making - Adaptive Responses - Task Execution - Problem Solving **Functionality - AI Agent Builders** - Omni-channel Support - Agent Branding - Proactive Response Capabilities - Seamless Human Escalation **Speech Synthesis - AI Voice Assistants** - Speech Synthesis - Customizable speech - Multiple voice actions **Performance Analysis** - Coaching - Peformance Tracking **Generative AI** - AI Text Generation - AI Text Summarization **Data and Analytics - AI Agent Builders** - Analytics & Reporting - Contextual Awareness - Data Privacy Compliance **Customer Query Resolution - AI Customer Support Agents** - Automated Ticket Resolution - Contextual Response Generation - Sentiment Analysis - Knowledge Base Utilization - Multilingual Support **Security and privacy - AI Voice Assistants** - Encrypted communication **Agentic AI - AI Agents** - Autonomous Task Execution - Multi-step Planning - Cross-system Integration - Adaptive Learning - Natural Language Interaction - Proactive Assistance - Decision Making **Sales Analysis** - ROI Forecasting - Sales Forecasting **Integration - AI Agent Builders** - Workflow Automation - API Usage - Platform Interoperability - CRM Data Integration **Customer Interaction Automation - AI Customer Support Agents** - Proactive Customer Outreach - Feedback Collection - Escalation Handling - Workflow Optimization **Compatibility - AI Voice Assistants** - Cross platform compatibility **Generative AI** - AI Text Generation - AI Text Summarization **Agentic AI - AI Sales Assistant** - Autonomous Task Execution - Multi-step Planning - Cross-system Integration - Adaptive Learning - Natural Language Interaction - Proactive Assistance - Decision Making **Automation** - Customer Interaction Automation - 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