Prototype Agent vs Production Agent
Bland AI is a quick way to prototype a voice bot. Spin up a basic agent on a single open-source LLM. It works for demos and low-stakes automation.
The Catch
You get one dated open-source model with $0.09/min calls and $15/month phone numbers. Plus, developer-heavy setup. No knowledge base. No branded calls. No PII redaction.
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Retell is the production voice AI that runs at scale. Built for healthcare, financial services, logistics, and contact centers doing thousands of calls a day.
- Always runs on the latest LLMs
- $0.07/min calls and $2/month phone numbers
- Knowledge base, branded calls, real-time variable extraction
- HIPAA, SOC 2 Type I & II, GDPR, and ISO 27001 on every plan
- Unlimited concurrent calls, 99.99% uptime, no rate limits
Retell offers more capability, less overhead.
Why Retell is Different
A voice agent that scales in production, not just in a sandbox.
Latest LLMs, Not a Single Open-Source Model
Bland AI locks you into one open-source model. Retell continuously integrates the newest LLMs from OpenAI, Anthropic, and beyond, so every call runs on the best conversational intelligence available. One model ages. Retell keeps getting smarter.
Production Ready, Not Developer Heavy
Bland AI needs engineers to configure advanced flows. Retell ships intuitive workflows any PM can run, plus native SIP trunking, knowledge base, branded calls, and real-time variable extraction out of the box. Your product team ships. Your engineers stay focused.
22% Lower Cost Per Minute, 87% Lower Number Cost
Retell: $0.07/min and $2/month per number. Bland: $0.09/min, $15/month per number, plus $0.015 for every unconnected outbound attempt. At scale, that gap is the difference between a POC and a P&L. Cheaper per minute. Cheaper per number. Cheaper at scale.
Enterprise-Grade by Default, Not by Tier
HIPAA, SOC 2 Type I & II, GDPR, and ISO 27001 on every plan. Automatic PII redaction for names, addresses, DOBs, passwords, and PINs. No rate limits. 99.99% uptime. Bland gates the robust stuff behind its top tier. Compliance shouldn't be an upgrade.
Infrastructure that doesn't blink
Bland wasn't built for 100 million calls a month. Retell was. Scale isn't a feature. It's the foundation.
Overview
Feature, Pricing & Compliance Breakdown
Bland AI's proprietary (closed-source) LLM limits agent intelligence and customizability. Retell closes that gap with custom LLM support, native telephony, and full enterprise compliance—all included by default, not gated behind higher tiers.
| Features |  |  |
|---|---|---|
| LLM Model | Always integrates the newest frontier LLMs | Single open-source model |
| Custom LLM Integration | Supported | Enterprise-only |
| Knowledge base | Smarter retrieval, multi-turn accuracy | Not Supported |
| Real-time variable extraction | Supported | Not supported |
| Voice & audio quality | Excellent | Adequate but inconsistent |
| Latency | Sub-second | Sub-second |
| Warm transfer | Supported | Supported |
| Multilingual | 55+ languages | Supported |
| IVR & DTMF support | Native with DTMF tone recognition | Not Supported |
| IVR & DTMF Support | IVR with DTMF tone recognition | Not native |
| Custom telephony | Native SIP trunking | Not supported |
| Branded calls | Supported | Not supported |
| Verified phone numbers | Included at no extra cost | Not supported |
| Ease of use | Intuitive workflows | Developer-heavy setup |
| Post-call analytics | Real-time insights, summaries, outcomes | Limited |
| Pricing | | |
|---|---|---|
| Voice AI | $0.07/min | $0.11–$0.14/min + $0.015 per unconnected outbound |
| Phone Number | $2.00/month | $15.00/month |
| Toll Phone Number | $5.00/month | Not Supported |
| Verified Phone Number | $10/month + $10 one-time setup | Not Supported |
| Branded Calls | $0.10 per outbound call | Not Supported |
| Batch Calls | $0.005 per dial | Not Supported |
| Extra Knowledge Base Slots | 10 free, then $8/month each | Not Supported |
| Concurrency Add-on | 20 free; $8/month per additional slot | Not Supported |
| Speech-to-Text | Included at no extra cost | Not Supported |
| Enterprise-Grade | | |
|---|---|---|
| Compliance | HIPAA, SOC2 Type 1 & 2, GDPR, ISO 27001 | HIPAA, SOC2 Type 1 & 2, GDPR |
| Rate Limit | No rate limit | 1000/day for lower plan; Enterprise plan will vary |
| Uptime to date | 99.99% | 99.99% |
| PII Redaction | Automatic redaction of names, addresses, DOBs, passwords, and PINs | Not Supported |
| Role-Based Access Control | Supported | Not Supported |
Built for Contact Centers, Not Demos
Retell is the AI Voice Platform Enterprise Contact Centers Run On
Retell lets you build, test and deploy AI phone agents that handle real call volume, so your team spends its time on the conversations that need a person.
More Than A Voice Bot
A voice AI that scales with your business, your calls, and your compliance needs.
Cheaper by the minute
22% less per minute — and $2/month numbers instead of $15. At production volume, that's real money.
Frontier LLMS, 55+ languages
Always integrates the newest GPT and Claude models. Bland runs a single aging open-source LLM.
Telephony that actually connects
Native SIP trunking, branded call IDs, and verified numbers lift answer rates. Bland offers none of these.
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Knowledge Base that scales
Smarter retrieval across multi-turn conversations. Agents sound sharp and accurate on complex calls. Bland has no equivalent.
When to Use Each Tool
Use Bland AI when you:
- Are experimenting with voice AI and want to get started with their AI builder
- Run basic automation at low volume
- Are comfortable building on Bland's proprietary model rather than interchangeable LLMs
- If you aren’t worried about many higher-end capabilities being gated behind enterprise pricing tiers
Bland AI works for demos and small-scale automation.
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Use Retell when you:
- Run production voice calls at scale
- Need the newest frontier LLMs, not a single open-source model
- Want the full toolkit: SIP, knowledge base, branded calls, post-call analytics
- Need HIPAA, SOC 2, GDPR, and ISO 27001 on day one, not gated to enterprise
- Price matters at 10,000+ minutes per month
Retell excels when the call operation is the product.
FAQ
Common Questions
What is Retell AI?
Retell is a voice AI platform for building production-grade phone agents. It handles inbound and outbound calls end-to-end — answering the phone, running the conversation, calling your tools, transferring to a human, and closing the task. Teams run Retell in production for support, sales, scheduling, collections, and operations.
How natural does Retell sound on a live call?
Very natural. Retell combines high-quality voice synthesis, sub-second latency, and dynamic turn-taking that adapts to how people actually talk — interruptions, overlap, backchannels, and repairs. Most callers don't realize they're talking to AI until the agent tells them.
How accurate is Retell's speech recognition?
Retell hits 95% speech recognition accuracy in production. That number holds up across accents, background noise, and real-world call conditions — not just studio audio — which is what separates demo-quality voice AI from something you can actually ship.
How reliable is Retell at scale?
Retell is built for high-volume production traffic. Call quality, latency, and accuracy hold steady whether you're running ten concurrent calls or ten thousand, across inbound queues and outbound batch campaigns. Reliability is a first-class requirement, not a stretch goal.
How customizable is the agent behavior?
Retell is API-first and fully programmable. You control the prompt, the tools, the transfer logic, the voice, the model, and the call flow — all through the API. Nothing about the agent is a black box, so you can tune behavior for your exact use case instead of settling for the platform's defaults.
Revolutionize your call operation with Retell
