Retell AI review, pricing and limits
Retell AI builds and deploys realistic AI phone agents with 600ms latency, handling 50M+ monthly calls, and HIPAA/SOC 2 compliance. Rated 4.8/5 on G2 by 1,414 teams.
- Best for
- Backend engineer building AI-native voice products or white-label call center bots
- Not for
- Non-technical founders who want a zero-config voice bot without API integration
Should you use Retell AI?
Retell AI suits engineering teams that want managed voice infrastructure instead of assembling speech-to-text, an LLM, and text-to-speech themselves. It replaces a 6-12 month internal build with a live integration, but budget carefully: real invoices commonly land 30-60% above the advertised per-minute rate once LLM and telephony fees stack on top.
600ms end-to-end voice latency combined with multi-provider LLM and TTS selection, giving developers a production-ready infrastructure that would take 6-12 months to build from scratch.
Retell's moat is its multi-provider flexibility, 600ms latency architecture, and G2 social proof with 1,414 reviews — but the underlying components (LLMs, TTS, telephony) are commodities, and Vapi and Bland AI compete at similar price points with comparable stacks.
Also for
- VP of Operations automating high-volume inbound call queues in healthcare or financial services
- Software engineers building voice AI products on top of a managed infrastructure layer
Show 3 more
- Call center operations managers automating high-volume inbound customer service queues
- Sales teams running AI-powered outbound prospecting and lead qualification campaigns
- Healthcare and financial services companies needing HIPAA-compliant voice automation
Also not for
- Solo marketers running low-volume outbound who find per-minute billing unpredictable
Main trade-off
Component-based pricing is opaque at signup: developers consistently report real costs 30-60% above the advertised $0.07/minute once LLM and telephony fees are added.
Retell AI pricing
| Plan | Monthly price | What it includes |
|---|---|---|
| Pay-As-You-Go | Free | per-minute |
| Enterprise | Custom | per-minute |
Usage-based: $0.07+/minute for voice engine, plus LLM ($0.003-$0.08/min) and telephony ($0.015/min). All-in realistic rate: $0.085-$0.19/minute. $10 free credits on signup. 20 concurrent calls included; additional at $8/line/month. Enterprise discounts from $0.05/min for accounts over $3,000/month.
Before you commit
- LLM costs ($0.003-$0.08/min) are not included in the headline $0.07/min rate
- Telephony costs ($0.015/min via Retell's Twilio) add on top of voice and LLM fees
- Additional concurrent call capacity costs $8/line/month beyond the 20 included
Estimate your token cost
What Retell AI does
Retell AI is a voice AI platform that has processed over 50 million AI phone calls, connecting speech recognition, a large language model, and text-to-speech into one real-time pipeline for inbound and outbound call automation. Unlike single-stack competitors, it lets developers choose their own LLM and voice-engine providers for each deployment.
600ms End-to-End Latency
Delivers voice responses in as low as 600 milliseconds from the end of caller speech, avoiding the awkward pauses that make phone bots sound robotic.
Component-Based LLM and Voice Selection
Lets developers pick their LLM (GPT-4.1, Claude, or others) and voice engine (ElevenLabs, Cartesia, MiniMax, OpenAI) independently, trading cost against quality for each deployment.
No-Code Conversation Flow Builder
Provides a node-and-transition flow editor for structured call scripts, letting non-engineers build branching inbound and outbound agent workflows without writing code.
Outbound Batch Campaigns
Runs high-volume outbound call campaigns without concurrency limits, with voicemail detection, real-time CRM record updates, and per-call conversion tracking.
Show all 6 features
Multilingual Voice with Auto-Detection
Automatically detects the caller's language and switches among dozens of supported languages, letting a single agent deployment serve multilingual audiences without separate configurations.
HIPAA and SOC 2 Compliance
Meets HIPAA, SOC 2 Type II, and GDPR requirements with PII redaction, encrypted transcripts, and audit-ready data processing agreements for regulated-industry deployments.
Works with
- Twilio
- Vonage
- ElevenLabs
- Cartesia
- OpenAI
- Make
- n8n
- HubSpot
- Salesforce
Missing integrations
- Slack
- Zendesk
- Freshdesk
- Intercom
Most users expect these and they are not currently supported.
Capabilities
- Voice AI
- AI phone agents
- Call automation
- Outbound calling
- Inbound support
- HIPAA compliant
- Developer SDK
Strengths and limits
Strengths
- G2 rating of 4.8/5 across 1,414 reviews, with 93% five-star ratings and recognition as G2 Best Agentic AI Software for 2026, the highest user-satisfaction score in the AI voice agent category.
- Multi-provider architecture lets teams mix and match LLMs and voice engines, giving cost control that single-stack competitors like Bland AI or Vapi cannot match at the component level.
- HIPAA, SOC 2 Type II, and GDPR compliance out of the box, enabling healthcare and financial services deployments without additional infrastructure work.
Limits
- Component-based pricing makes total cost hard to predict up front: real invoices commonly land 30-60% above the headline per-minute rate once LLM and telephony fees are added.
- Voice quality for non-English calls, particularly German, has drawn complaints: 67 G2 reviewers specifically cited issues with international language support.
- No zero-code onboarding path: building production agents requires developer involvement for LLM selection, telephony configuration, and SDK integration, which limits adoption by non-technical teams.
Retell AI alternatives
| Tool | Price from | Free plan | Runs on | Rating |
|---|---|---|---|---|
| Retell AI This page | -- | Yes | Web | -- |
 echowinechowin ships a no-code phone receptionist ready to go for a small business out of the box; Retell AI hands developers a controlled voice pipeline with their own choice of LLM and TTS provider. | $49.99/mo | Yes | Web | -- |
 RootleRootle concentrates on Indian-language call volume with a no-code setup; Retell AI covers HIPAA and SOC 2 Type II compliant infrastructure built for regulated industries. | -- | -- | Web | -- |
 ElevenLabsAI voice platform for text-to-speech, voice cloning, dubbing, music and conversational voice agents | $6/mo | Yes | Web · iOS · Android | 4.3 |
Retell AI facts
- Compliance
- HIPAA · SOC 2 Type II · GDPR
- Works offline
- No
- Minimum skill level
- Intermediate
- Price band
- Mid-range
- Maker founded
- 2023
- Training-data policy
- Customer call data is not stated to be used for model training; PII redaction built in for all transcripts
- Total funding
- $5.1M seed (Y Combinator W24, Alt Capital, Carya Venture, plus angels including co-founders of Lyft, Box, and Twitch)
Data and privacy
Proprietary
Questions about Retell AI
What does Retell AI actually cost?
Retell AI charges $0.07+/minute for the voice engine with no platform fee, plus separate costs for the LLM ($0.003-$0.08/minute) and telephony ($0.015/minute), which bring the realistic all-in rate to $0.085-$0.19/minute. Twenty concurrent calls are included free, with additional lines at $8/line/month, and enterprise accounts spending $3,000+/month receive volume discounts to about $0.05/minute.
Can you use Retell AI without paying?
There is no ongoing free tier, but new accounts get $10 in free credits and 20 concurrent calls at no charge, enough for roughly 140 minutes of testing at the base rate. Usage-based billing begins automatically once the credits run out.
Which tools compete with Retell AI in 2026?
Bland AI offers simpler flat per-minute pricing that is easier to budget than Retell's component-based model. Vapi targets developers who want similar multi-provider flexibility but with a smaller user community. Twilio Voice suits teams that want raw telephony infrastructure and plan to build their own voice AI stack from scratch rather than use a managed platform.
Is Retell AI better than Bland AI?
Retell's multi-provider architecture lets teams choose their LLM and voice engine independently, while Bland AI runs a fixed stack with simpler, more predictable per-minute billing. Retell publishes explicit HIPAA and SOC 2 Type II compliance documentation, which matters for healthcare and financial-services deployments, while Bland AI's compliance posture is less prominently documented. For regulated-industry call automation, Retell is the stronger pick.
How long does it take to get going with Retell AI?
The dashboard side moves fast: sign up on retellai.com to claim the signup credits and included concurrency, then choose an LLM and voice engine, or sketch a call script in the no-code flow builder within minutes. Developers wiring custom logic through the Node.js or Python SDK and connecting a number via Twilio or Vonage typically need longer before going fully live.
About Retell AI
Retell AI is a voice agent platform founded in 2023 in New York by Bing Wu, Evie Wang, Zexia Zhang, Todd Li, and Weijia Yu. The company is backed by $5.1M in seed funding from Y Combinator (W24 batch), Alt Capital, Carya Venture, and angel investors including the co-founders of Lyft, Box, and Twitch, and has grown to a team of 25 serving clients across healthcare, financial services, insurance, logistics, and retail.
Read the full background
The core product assembles speech-to-text, a large language model, and text-to-speech into a single real-time voice pipeline for inbound and outbound calls. Rather than locking teams into one vendor, it exposes each stage of that pipeline for independent selection, and developers can build custom workflows with SDKs alongside a no-code conversation flow builder for non-engineers, giving full control over the quality-versus-cost trade-off that a fixed-stack platform does not allow.
Sources and guides
Official sources
- Retell AI official site Vendor
- Retell AI Documentation Docs
- Retell AI Pricing Page Docs
Product facts on this page (pricing, plans, integrations, compliance) are read from Retell AI's own pages and documentation. The verdict is Hokai's reading of them, not the vendor's claim.
Hokai guides covering Retell AI
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