Review of Retell AI
Retell AI is an AI voice agent platform built to automate inbound and outbound phone calls. Its agents respond in under 600ms, support over 31 languages with native speech patterns, and handle complex multi-turn conversations. The platform offers a no-code drag-and-drop builder for structured conversation flows, as well as full API access for developers. Every account gets 20 free concurrent calls. Retell AI is SOC 2 certified, HIPAA-ready, and supports SSO for enterprise environments. No platform fees — you only pay for what you use.
Retell AI: Des agents vocaux IA pour vos appels téléphoniques — no-code ou API, 600ms de latence, conformité SOC 2 et HIPAA incluse.
Best for
- Sales teams looking to automate phone prospecting and customer follow-ups.
- Healthcare companies needing HIPAA-compliant agents for appointment booking.
- Developers integrating AI voice capabilities into their applications via API.
- SMBs and SaaS looking to automate phone customer support without a dedicated team.
Not ideal for
- Small organizations with few calls and a tight budget — per-minute costs can be prohibitive.
- Text-only use cases — Retell AI is purpose-built for voice interactions.
- Teams without developers for complex integrations with third-party systems.
- Projects requiring full control over the underlying telephony infrastructure.
Pros & cons
- ✅ 600ms latency for smooth, natural-sounding voice conversations in real time.
- ✅ Support for 31 languages with automatic detection and native speech patterns.
- ✅ No-code drag-and-drop builder and full API access for all user profiles.
- ✅ Certified SOC 2 and HIPAA-ready for regulated industries (healthcare, finance).
- ✅ $10 in free credits on account creation, no subscription required.
- ⚠️ Per-minute costs can add up quickly for high-volume deployments.
- ⚠️ The platform requires some technical expertise for advanced CRM integrations.
- ⚠️ Available voices depend on third-party providers (ElevenLabs, OpenAI) and their pricing.
- ⚠️ The pre-built template library is less developed than some competitors.
Our verdict
Retell AI has established itself as one of the benchmarks in the AI voice agent market. Its combination of ultra-low latency (600ms), native multilingual support (31 languages), and a no-platform-fee architecture clearly differentiates it from competitors. The dual no-code and API approach appeals to both business teams and developers alike. SOC 2 certification and HIPAA readiness open doors in the most regulated industries. The usage-based pricing model is transparent but can surprise at high volumes — cost forecasting before deployment is essential. Overall, Retell AI is a solid choice for any organization looking to deploy reliable, scalable, and compliant AI voice agents.
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FAQ
What is the actual cost of using Retell AI?
The total cost combines the voice engine ($0.07-$0.08/min), LLM costs ($0.006-$0.06/min depending on the model), and telephony ($0.015/min). Most practical configurations cost between $0.13 and $0.31 per minute.
Is Retell AI HIPAA compliant?
Yes, Retell AI is SOC 2 certified and HIPAA-ready, with custom compliance terms available for enterprise contracts. It is suitable for deployments in the healthcare sector.
Can I use Retell AI without coding?
Yes, Retell AI offers a visual no-code drag-and-drop builder for creating structured conversation flows. Full API access is also available for developers who need deeper customization.
How many concurrent calls can Retell AI handle?
Every account includes 20 free concurrent calls. Additional capacity is available at $8 per concurrent call per month, with enterprise terms available for high volumes.
Which voice models are available on Retell AI?
Retell AI integrates with multiple voice providers including ElevenLabs and OpenAI Voice. Costs vary by provider, ranging from $0.07 to $0.08 per minute for the voice engine.