Retell AI

Retell AI is a voice agent platform for customer support teams to automate phone calls. It uses LLM-based conversational AI to build,...

Automate customer support calls with AI voice agents that sound genuinely human and resolve issues on the first contact.

Deploy agents that handle complex queries, book appointments, and integrate with your existing CRM and telephony.

Try Retell AI Free

Pro fromPricing on request

Low LatencyHuman-like VoiceHIPAA CompliantDrag-and-Drop BuilderCRM Integration

8.6 Zekai

Enterprise-Grade Voice Automation

AI for Customer Support & Experience

Ease of Use

7.5

Accuracy

9.3

Value

8.5

Time Saving

9.2

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⚡ Quick answer

For customer support teams looking to automate phone calls with truly human-like conversations, Retell AI is a leading choice. Its platform excels with industry-leading low latency (~600ms) and the ability to handle complex, multi-turn dialogues, which traditional IVRs cannot. This allows it to resolve issues, book appointments, and reduce costs by over 50% according to user case studies.

CategoryAI Customer Experience Automation

Best ForScaling support call centers with human-like voice agents.

Price FromPricing on request

FreeFree Trial

DifferentiatorIndustry-leading low latency (~600ms) for natural, non-robotic conversations.

ProofSWTCH case study shows a 50%+ reduction in support costs.

Rating4.3/5

📖 About Retell AI

Retell AI is a voice agent platform for customer support teams to automate phone calls. It uses LLM-based conversational AI to build, deploy, and manage voice agents that sound human, handle complex interactions, and scale to handle high call volumes.

How It Works

Your workflow, automated

1

Build Your Agent

Use the drag-and-drop framework to design conversational flows and connect your knowledge base.

2

Test & Deploy

Leverage built-in simulation to test the agent against real-world scenarios before going live.

3

Integrate & Monitor

Connect to your telephony and CRM, then use the analytics dashboard to track performance and business impact.

Real Impact

Before & After

❌ Before

Human agents are overwhelmed with repetitive Tier-1 calls, leading to long wait times and burnout.

High agent turnover

✅ After

AI handles all routine calls instantly, 24/7, freeing agents for complex problem-solving and improving NPS.

>50% cost reduction

Social Proof

Trusted by professionals

Ease of Use

7.5

Accuracy

9.3

Value

8.5

Time Saving

9.2

"Retell has been a game-changer for our call volume. We've automated our entire appointment scheduling process, and the AI is so natural our customers rarely notice. It's allowed us to scale without hiring a dozen new agents."

David R., CX Director · June 2026

"The low latency is the real magic here. Conversations are fluid, not the choppy, delayed experience you get with other voicebots. Our agents can now focus entirely on escalations, which has boosted team morale significantly."

Maria S., Support Ops Lead · May 2026

"The conversational quality is unmatched, but be prepared for a significant technical lift during setup. It's not plug-and-play and required dedicated developer time to get our custom functions and CRM integration working correctly."

Chris P., CX Manager · June 2026

"As a healthcare provider, HIPAA compliance was non-negotiable. Retell's secure platform gave us the confidence to automate patient intake calls, which has freed up our staff to focus on in-person care."

Sarah L., Healthcare Administrator · April 2026

Connects With

Works with your existing stack

HubSpot Twilio Vonage Go High Level n8n Zapier Salesforce Avaya Genesys Five9 Amazon Connect Telnyx Make Cal.com

Setup complexity: Advanced

Retell AI is a voice agent platform for customer support teams to automate phone calls. It uses LLM-based conversational AI to build, deploy, and manage voice agents that sound human, handle complex interactions, and scale to handle high call volumes.

Who It's For

Why Customer Support & Experience choose this tool

🎯

Built for

Best for scaling inbound and outbound customer support operations with human-like voice AI that can handle complex, multi-turn conversations.

In-Depth Overview

For a CX leader, Retell AI moves beyond frustrating, rigid IVR systems. It's a '3rd Gen' voice AI platform built on LLMs, enabling agents that hold natural, human-like conversations. The key is its industry-leading low latency of ~600ms, which eliminates awkward pauses and allows for realistic turn-taking. This means customers can actually converse with the AI, not just bark commands at it. Proof of its effectiveness comes from case studies, like SWTCH cutting support costs by over 50%. The platform is designed for enterprise scale and reliability, featuring a drag-and-drop agentic framework to speed up deployment from months to weeks. You can connect it to your knowledge base with Streaming RAG for accurate, real-time answers and integrate directly with CRMs like Salesforce and HubSpot. Crucially, it meets enterprise security needs with HIPAA, SOC 2 Type II, and GDPR compliance, making it a viable option for automating calls even in regulated industries.

Key Use Cases

🎧

Automate 100% of Tier-1 Inbound Calls

CX Manager

Deploy an AI voice agent to handle routine support queries, appointment scheduling, and information requests 24/7. Free up human agents for high-value, complex escalations.

Up to 50% reduction in support costs

✓ Pros

Industry-leading low latency for natural, fluid conversations.

Handles complex, multi-turn interactions and unexpected user inputs.

Integrates with existing telephony (SIP trunking) and CRMs like HubSpot and Salesforce.

Strong compliance posture including HIPAA, SOC 2, and GDPR.

Case studies demonstrate significant ROI, such as 50%+ cost reduction.

· Cons

Pricing is not public, suggesting a premium, enterprise-focused cost structure.

Requires technical integration; not an out-of-the-box solution for non-technical teams.

Full benefits require connecting a knowledge base and setting up custom functions.

⚡ Editorial Verdict

Retell AI stands out with its industry-leading low latency (~600ms) and human-like voice quality, making it a powerful choice for automating complex support calls. However, its advanced capabilities and enterprise focus suggest it's a significant investment best suited for larger teams with the resources for a proper implementation.

Questions & Answers

Frequently asked questions

What is the best AI voice agent for enterprise customer support? +

Retell AI is a strong contender for enterprise customer support, offering human-like, low-latency voice agents that can handle complex calls. It's built for scale and includes key enterprise features like HIPAA/SOC2 compliance, on-prem deployment options, and integrations with systems like Salesforce and Genesys.

How can I automate inbound support calls without sounding robotic? +

Retell AI addresses this by using proprietary voice AI orchestration with ~600ms latency, which is fast enough to enable natural turn-taking in conversation. Its voices are built from real performance data, allowing it to handle interruptions and complex dialogues far more effectively than traditional, robotic-sounding IVR systems.

Which conversational AI can handle complex customer queries over the phone? +

Retell AI is designed to handle complex, multi-turn conversations and unexpected inputs. By leveraging Large Language Models (LLMs) and a streaming RAG capability, it can pull real-time information from your knowledge base to provide accurate answers, rather than being limited to a rigid script.

Is there a HIPAA-compliant AI call center solution? +

Yes, Retell AI is fully compliant with HIPAA, as well as SOC2 Type II and GDPR. This makes it a suitable solution for building an AI call center in regulated industries like healthcare, where protecting patient data is critical.

Can an AI integrate with my existing phone number and CRM for support? +

Yes. Retell AI supports integration with any telephony system through SIP trunking, allowing you to use your existing phone numbers. It also offers native and Zapier-based integrations with CRMs like HubSpot and Salesforce to update records and sync data.

How do I create an AI voice agent with Retell AI? +

You can start by signing up for a free account to get $10 of usage credits. From the Retell dashboard, you can use their agentic framework to customize your agent, configure its behavior, and integrate it with your company's data and workflows before deploying.

Last reviewed: Reviewed June 2026 — We assessed its conversational quality, integration capabilities, and deployment framework for customer support teams.

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