
When you search for Retell AI pricing, the first number you will see is $0.07 per minute. That sounds affordable until you realize it only covers one piece of the actual cost.
Retell uses a stacked, component-based billing model where you pay separately for voice infrastructure, text-to-speech, the language model powering your AI, and telephony. By the time every component is added together, the real cost per minute is closer to $0.11 to $0.19, depending on the configuration you choose.
For engineering teams building custom voice AI products, that modular structure makes sense. You pick exactly the components you need and optimize costs at the API level. But for service-based business owners who just need an AI phone receptionist to answer calls, book appointments, and capture caller details, Retell's pricing model introduces a level of complexity and unpredictability that most small businesses should not have to manage.
This Retell AI pricing breakdown covers exactly what each component costs, where the hidden fees are, what your real monthly bill looks like at different call volumes, and how Retell compares to a flat-rate AI receptionist like Welco AI.
Most AI phone answering services use fixed monthly plans with a set pool of calls or minutes included. Retell instead uses a pay‑as‑you‑go model where every minute of call time is built from several separate cost components added together.
On the self‑serve, pay‑as‑you‑go plan, you are not only paying for raw minutes. You also get access to the full Retell platform from day one, including:
Here is what you pay for on every call:
| Component | What it covers | Cost per minute* |
|---|---|---|
| Voice Infrastructure | Retell’s core platform for handling AI calls | $0.055 |
| Text-to-Speech (Standard) | Converting AI responses into spoken voice | $0.015 |
| Text-to-Speech (ElevenLabs) |
| Premium, more natural-sounding voice option |
| $0.040 |
| LLM — Budget (GPT-4o Mini) | The AI model that understands and responds to callers | $0.012 |
| LLM — Mid-Range (GPT-4o) | More capable AI model for complex conversations | $0.040 |
| LLM — Premium (Claude Sonnet) | Most capable AI model for nuanced interactions | $0.080 |
| Telephony (Retell Twilio, US) | Connecting calls over the phone network | $0.015 |
*Exact LLM rates vary by model, but the examples above stay within Retell’s published per‑minute ranges.
The 0.07 dollars per minute figure you see in Retell’s marketing reflects voice infrastructure alone. It does not include the AI model, text‑to‑speech, or telephony, and in real usage you pay for all four together.
When you stack every component, your effective per‑minute price depends on how powerful a model and voice you choose:
| Configuration | Voice Infra | TTS | LLM | Telephony |
|---|---|---|---|---|
| Budget (GPT-4o Mini + standard voice) | $0.055 | $0.015 | $0.012 | $0.015 |
| Mid-Range (GPT-4o + standard voice) | $0.055 | $0.015 | $0.040 | $0.015 |
| Premium (Claude Sonnet + ElevenLabs) | $0.055 | $0.040 | $0.080 | $0.015 |
Even the cheapest possible configuration costs nearly 40% more than the advertised $0.07 headline rate. The mid-range setup, which is what most businesses would use for natural-sounding conversations, costs almost double the advertised figure.
The stacked per‑minute rate is only one layer of what you pay for with Retell. There are also monthly, one‑time, and per‑minute add‑ons that sit on top of your base call costs.
Here are some of the most important extras to factor in:
| Item | Cost* |
|---|---|
| Phone numbers (Retell) | 2 dollars per month per number (custom mapping free) |
| Retell SMS add‑on | 20 dollars per month (plus about 0.01 dollars per SMS as a chat add‑on) |
| Additional concurrency (beyond 20 calls) | About 8 dollars per extra concurrent call per month |
| Additional knowledge bases (beyond 10) | 8 dollars per knowledge base per month; first 10 are free |
| Knowledge base usage | 0.005 dollars per minute |
| Branded caller ID | 0.10 dollars per outbound call |
| Advanced denoising | 0.005 dollars per minute |
| Safety guardrails | 0.005 dollars per minute |
| PII removal from transcripts | 0.01 dollars per minute |
| AI Quality Assurance | First 100 minutes free, then 0.10 dollars per minute |
| Fast‑tier LLM processing | Higher‑tier models priced above standard per‑minute rates (effectively around 1.5× in many cases) |
If you are running a mid‑range configuration at about 0.125 dollars per minute and you enable knowledge base usage, safety guardrails, and PII removal, those three add‑ons alone add 0.005 + 0.005 + 0.01 = 0.02 dollars per minute, pushing your effective rate to roughly 0.145 dollars per minute. That is an increase of around 15 to 20 percent over the base configuration, which sits comfortably in the 10 to 25 percent uplift range once you include other possible extras such as advanced denoising or AI QA.
There is also a token surcharge applied when your AI agent's prompt exceeds 3,500 tokens. If your business needs detailed instructions, product catalogs, or service menus loaded into the AI, you will likely exceed that threshold, and the surcharge increases your LLM cost further.
Want Predictable Monthly Pricing Instead?
Welco AI charges a flat monthly fee with minutes included. No stacking components, no add-on surcharges, no billing surprises at the end of the month.
Once you understand how Retell’s stacked per‑minute pricing and add‑ons work, the next question is how much you can actually test before you start paying out of pocket. That is where Retell’s free usage credits come in.
Retell does not offer a traditional free trial with a fixed number of days. Instead, new accounts start at 0 dollars and receive 10 dollars of free credits to test the platform. Those credits are consumed at whatever per‑minute rate your chosen configuration uses.
Here is how far 10 dollars stretches across different setups, using the configurations and all‑in per‑minute rates defined earlier:
| Configuration | Cost per minute | Minutes from 10 dollars |
|---|---|---|
| Budget | 0.097 dollars | ≈ 103 minutes |
| Mid‑range | 0.125 dollars | 80 minutes |
| Premium | 0.190 dollars | ≈ 52 minutes |
At a mid‑range configuration, 80 minutes of usage translates to roughly 25 to 30 calls if your average call lasts about 3 minutes, which is enough to validate basic behavior and call quality. Once your 10 dollars of free credits are used up, your account continues on the same usage‑based, pay‑as‑you‑go model that Retell applies to all voice minutes.
Retell offers an Enterprise tier for teams that outgrow the self‑serve, pay‑as‑you‑go plan and need higher limits, stricter security, and tailored contracts. This tier is designed for organizations running Retell as core infrastructure, not for typical small service businesses.
On Enterprise, pricing shifts from public per‑minute rates to custom quotes based on your volume and requirements. What you get in return includes:
The documentation does not list a specific minimum monthly spend, but the emphasis on custom pricing, dedicated servers, and enterprise‑grade support signals that this tier is built for high‑volume deployments handling large numbers of calls every month. For smaller service businesses such as dental clinics, law firms, plumbing companies, and salons, a ready‑to‑use AI receptionist with straightforward monthly plans, like Welco AI phone answering service, is usually a more practical fit.
In the next section, lets do detailed comparison between Retell AI and Welco AI.
The most important thing to understand about this comparison is that Retell AI and Welco AI are built for fundamentally different buyers. Retell is a developer API platform designed for engineering teams building custom voice AI applications. Welco AI is a ready-to-use AI receptionist built for service-based business owners who need their phones answered professionally without writing code or managing infrastructure.
That distinction shapes everything from pricing structure to feature set to the day-to-day experience of using each platform.
| Retell AI | Welco AI | |
|---|---|---|
| Pricing model | Pay‑as‑you‑go, stacked per‑minute components | Flat monthly plans with minutes included |
| Entry price | 0 dollars platform fee (pay per minute used) | 39 dollars/month (Starter), 60 mins included |
| Mid‑range cost | ≈ 0.125 dollars/min (all components) | 149 dollars/month (Business, 300 min included) |
| Billing predictability | Variable, changes with configuration and usage | Fixed, same bill every month within plan limits |
| Free trial | 10 dollars in credits (~80 min at mid‑range) | 7‑day free trial with full access |
| Overage handling | Continuous per‑minute billing, no hard cap | Per‑minute overage on plan, clearly defined rates |
| Enterprise tier | Custom pricing for high‑volume deployments | Custom plans available |
| Feature | Retell AI | Welco AI |
|---|---|---|
| Setup complexity | API‑first platform; typically needs a developer to launch and maintain a phone agent | Self‑service setup, no coding required |
| Intake forms | Structured data capture via custom flows and functions | Built‑in structured intake forms |
| Call transfer | Available through configured flows and API | Built‑in with intent‑based routing |
| Appointment scheduling | Built‑in AI appointment scheduling that must be configured and linked to your calendar | Native calendar integration |
| CRM integration | Integrations and API/webhooks for tools like HubSpot, Salesforce, and others | Native Salesforce and HubSpot integration |
| Call recording | Call analytics and transcripts available | Available on Professional plan and above |
| SMS notifications | 20 dollars/month SMS add‑on (plus per‑SMS usage) | Included on Professional plan and above |
| Knowledge base | First 10 knowledge bases free; 8 dollars/month for each extra | Included by plan tier |
| Support | Community and email support on pay‑as‑you‑go; 24/7 multi‑channel support on Enterprise | Email and priority support by plan |
| Target user | Development teams and AI builders | Small service‑based business owners |
Retell AI is an API‑first platform designed for teams that want to build and control custom voice agents. To get a production‑ready AI phone agent, you typically need an engineer to define the agent’s behavior, connect it to your phone system, wire it into your calendar and CRM, and keep it updated as your processes change. Freelance voice‑AI developers often charge professional hourly rates, and building a robust agent can take dozens of hours, which turns into a meaningful upfront implementation cost plus ongoing maintenance whenever you change scripts or integrations.
With Welco AI, setup is designed for non‑technical owners. You walk through a guided, no‑code flow, set your greeting, add your business details, define how you want calls handled, and then forward your number. There is no need to write code or manage infrastructure, and ongoing changes can be made directly in the interface without involving a developer.
Retell AI’s voice agent pricing and platform design make the most sense when you are building voice AI as a product, not just replacing a receptionist. It suits engineering teams and AI agencies that want fine‑grained control over models, telephony, and call flows, and are comfortable owning the API work and infrastructure. It also fits larger organizations and call centers with high, steady call volumes, where custom enterprise pricing and dedicated infrastructure can offset the complexity of the stacked, usage‑based model.
Retell AI is a strong platform on its own terms. The voice quality is high, model options are flexible, and the API gives developers fine‑grained control over how calls are handled. For product teams and agencies building voice AI as a core offering, that control and the pay‑as‑you‑go structure can be both fair and cost‑effective.
For service‑based business owners, the key question is different: do you actually need a developer platform at all?
If your main goal is to stop missing calls, capture caller details, and book more appointments, a stacked per‑minute API with four billing components is overkill.
You need a finished receptionist that works the day you sign up. That is why, for owners running dental clinics, plumbing companies, law firms, salons, and similar service businesses, Retell AI pricing only makes sense if you already have the technical resources to use it well.
If you do not, a ready‑to‑use AI receptionist like Welco AI, with flat monthly pricing and no‑code setup, is usually the more practical choice.
Welco AI is a AI answering service built for service businesses that want every call answered without hiring more staff. It runs 24/7, greets callers in a natural voice, captures key details, and books or routes calls based on rules you set. You do not need developers or API keys: setup happens through a guided, no‑code interface that most teams complete in a few minutes.
If Retell feels too technical, too variable, or too open‑ended, Welco AI gives you a focused product that does one thing very well: answer your calls like a trained AI call receptionist and help you turn more of those calls into booked business.
Skip the Dev Work. Start Answering Calls Today.
Welco AI sets up in 15 minutes with no API keys, no code, no engineering team required. Just a professional AI receptionist that handles calls, captures details, and books appointments from day one.
Retell AI's advertised rate starts at $0.07 per minute, but that only covers voice infrastructure. The real per-minute cost includes text-to-speech, LLM processing, and telephony charges that stack together. A typical all-in cost ranges from $0.10 to $0.19 per minute depending on which voice and AI model you select.