Voice AI Pricing Per Minute: The Complete Agency Guide
Voice AI pricing per minute is not one number. A complete price includes the platform, speech recognition, the language model, voice synthesis, and telephony. As of August 2026, Trillet charges agencies $0.12 per AI minute for the first four layers, with web and bring your own telephony calls adding no Trillet telephony fee and US Trillet telephony starting at $0.014 per minute. This guide shows the component math, transfer pricing, and total agency cost at 5, 10, 20, and 50 clients.
Comparisons fail when one vendor quotes a platform fee and another quotes a composed call. The only useful approach is to declare the configuration, call channel, included minutes, and client count before naming a winner.
If you are evaluating Vapi specifically, the Vapi pricing per minute breakdown models its platform, STT, LLM, TTS, and telephony charges with reproducible configurations.
The Bottom Line
Voice AI costs become comparable only after every layer is put on the same basis.
- Trillet: $0.12 per AI minute includes platform, STT, LLM, and TTS. Telephony is separate. The Agency plan is $299 per month with 300 AI minutes included.
- Vapi: $0.05 per minute is the platform fee only. STT, LLM, TTS, and telephony are additional, so there is no universal Vapi cost per minute.
- Retell: published AI voice pricing runs from $0.07 to $0.31 per minute, with the final price determined by infrastructure, voice, model, telephony, and optional features.
The cheapest voice AI platform therefore depends on the configuration. A technical team using inexpensive models and its own telephony can make developer infrastructure very cheap. An agency may prefer a finished white-label platform when the extra dashboard, billing, compliance, and client-management work would cost more than the difference in usage rates.
What Makes Up Voice AI Pricing Per Minute?
A voice AI minute has five cost layers: platform orchestration, speech-to-text, the language model, text-to-speech, and telephony. A sixth cost, the agency or white-label subscription, sits above the call itself.
| Layer | What it pays for | Why the price changes |
|---|---|---|
| Platform | Turn taking, call control, logs, tools, and orchestration | Vendor fee or bundled platform rate |
| STT | Converts the caller's speech into text | Language, model, and streaming provider |
| LLM | Decides what the agent says or does | Model choice, prompt size, and token use |
| TTS | Converts the answer into speech | Voice provider and voice quality |
| Telephony | Connects the call to the phone network | Country, carrier, direction, and number type |
| Agency layer | Branding, client workspaces, rebilling, and support | Subscription tier and client count |
What to do: ask every vendor for an invoice estimate that names all six layers. If the estimate omits the model or carrier, it is not an all-in cost, regardless of what the headline says.
What Does Trillet Cost Per Minute?
Trillet White-Label charges $0.12 per AI minute after the plan's included minutes. That price bundles Trillet's platform, STT, LLM, and TTS, but it does not include telephony.
As of August 2026, Studio costs $99 per month and includes 100 AI minutes across up to three workspaces. Agency costs $299 per month and includes 300 AI minutes across unlimited workspaces. The included pool applies once to the agency account, not once per client.
| Call scenario | Charge while the AI is active |
|---|---|
| Web call | $0.12 per minute after included AI minutes |
| Bring your own telephony | $0.12 per minute after included AI minutes, plus the customer's carrier bill |
| Trillet US telephony | $0.12 AI usage plus telephony starting at $0.014 per minute |
| Trillet telephony outside the US | $0.12 AI usage plus the applicable country rate |
| Transferred portion | $0.05 per minute after AI usage stops |
Once a call transfers to a human, Trillet stops the $0.12 AI usage charge. Only the transferred portion is billed at $0.05 per minute. This matters for reception workflows that answer briefly and then route a caller to a person.
For example, three US phone minutes with the AI followed by two transferred minutes cost 3 x ($0.12 + $0.014) + 2 x $0.05 = $0.502, before applying any included AI minutes. A five-minute web call that never transfers costs $0.60 before included minutes, with no telephony fee.
Current plan limits and add-ons are listed on the Trillet white-label pricing page.
What Is Vapi's Actual Cost Per Minute?
Vapi's published $0.05 per minute is its hosting and orchestration charge, not the total call price. Vapi passes through STT, LLM, and TTS at cost, and telephony also depends on the selected provider.
The Vapi pricing page explicitly separates the $0.05 hosting fee from model-provider costs. Bring your own API keys can reduce the amount billed through Vapi, but it does not make the underlying model usage free. Vapi also lists 10 concurrent lines as included, additional lines at $10 per line per month, HIPAA at $2,000 per month, and zero data retention at $1,000 per month.
A useful Vapi estimate looks like this:
Vapi total = $0.05 platform + STT + LLM + TTS + telephony + applicable add-ons
There is no honest universal value to place after the equals sign. An economical model and voice can keep the total near the lower end of the market. Premium models and voices can move it above $0.30 per minute. Agencies should model the exact components they intend to deploy, then add any wrapper subscription required to sell that configuration under their own brand.
How Does Retell Pricing Compare?
Retell publishes a composed AI voice range of $0.07 to $0.31 per minute. Its detailed price is the sum of voice infrastructure, TTS, LLM, telephony, and any selected call features.
As of August 2026, the Retell pricing page lists voice infrastructure at $0.055 per minute, standard voices at $0.015 per minute, premium ElevenLabs voices at $0.040 per minute, and LLM prices from low-cost models to premium models. Custom telephony adds no Retell telephony charge, while Retell-provided calling carries a country-specific rate.
Retell's strength is transparent component choice. A technical team can choose a cheaper model, use custom telephony, and reach a low composed rate. The trade-off for an agency is that Retell does not provide a native white-label reseller dashboard, so the agency must build that layer or subscribe to a wrapper.
How Do White-Label Wrappers Change the Total Cost?
A wrapper adds a monthly agency-platform fee to the underlying provider's composed call cost. It may simplify branding, client access, and rebilling, but it does not replace the Vapi, Retell, or other provider bill underneath.
As of August 2026, VoiceAIWrapper's pricing is $29, $79, $249, or $499 per month. Those tiers include 2, 5, 10, or 20 client accounts respectively, then charge published per-client fees above the included count. Voice minutes are billed directly by the selected provider with no VoiceAIWrapper markup.
That is a genuine advantage for agencies that want to select different providers for different clients. It is also why a fair comparison must include both the wrapper subscription and the named provider configuration. Calling a wrapper's subscription “the price of voice AI” leaves most of the invoice out.
For a broader selection framework, see the Trillet vs Retell vs Vapi comparison.
What Does Voice AI Cost at 5, 10, 20, and 50 Clients?
At 500 AI minutes per client per month, Trillet Agency costs between $563 and $3,263 for web or bring your own telephony calls across 5 to 50 clients. Baseline US Trillet telephony raises those totals to between $598 and $3,613.
The table uses these named assumptions:
- Every client uses 500 connected AI minutes and no minutes are transferred.
- Trillet uses the $299 Agency plan and subtracts its shared 300 included AI minutes once.
- “US phone” adds $0.014 for every connected minute. International pricing is not modeled.
- The wrapper example uses VoiceAIWrapper Growth at 5 clients, Scale at 10, Pro at 20, and Pro plus 30 extra clients at $10 each for 50.
- The wrapper's provider example uses Retell at $0.11 per minute with custom telephony, matching the composed example on Retell's pricing calculator when checked in August 2026. Different models, voices, telephony, and add-ons change the result.
| Clients | Minutes | Trillet web/BYO | Trillet US phone | VoiceAIWrapper + named Retell config |
|---|---|---|---|---|
| 5 | 2,500 | $563 | $598 | $354 |
| 10 | 5,000 | $863 | $933 | $799 |
| 20 | 10,000 | $1,463 | $1,603 | $1,599 |
| 50 | 25,000 | $3,263 | $3,613 | $3,549 |
The wrapper configuration wins on raw cost at 5 and 10 clients. At 20 clients, it is within $4 of Trillet's baseline US phone total and costs more than Trillet on web or bring your own telephony. At 50 clients, it remains $64 below Trillet's baseline US phone total but $286 above Trillet's web or bring your own telephony total.
For higher-volume planning, the same formula produces these Trillet Agency totals after subtracting the shared 300 included AI minutes once:
| Monthly minutes | Web/BYO telephony | Baseline US Trillet telephony |
|---|---|---|
| 15,000 | $2,063 | $2,273 |
| 100,000 | $12,263 | $13,663 |
This is not a universal vendor ranking. A lower-cost Retell model could improve the wrapper result, while a premium model, managed telephony, or additional provider features could reverse it. Trillet's quoted rate includes the model stack and agency layer; the wrapper example preserves more component choice. Pick the structure that matches the service you intend to sell.
How Should Agencies Calculate Hidden Labor Cost?
Labor belongs in total cost of ownership only when the agency measures the work a platform actually creates. Multiplying an invented hour estimate by an arbitrary salary produces a precise-looking fiction.
Use this formula instead:
Monthly labor cost = (onboarding hours + maintenance hours + billing hours + support hours) x loaded hourly rate
For a US benchmark, the Bureau of Labor Statistics' May 2025 Occupational Employment and Wage Statistics lists mean hourly wages of $64.87 for general and operations managers and $74.18 for advertising and promotions managers. Those are wages, not fully loaded employer costs, so an agency should replace them with its own payroll, contractor, or opportunity-cost figure.
Track the same tasks during a trial on each platform. Include agent setup, client permissions, model and carrier configuration, invoice reconciliation, updates, and support escalation. A cheaper software bill can still win if it creates little extra work, and an expensive platform can be justified if it removes enough measured labor.
Which Voice AI Platform Is Cheapest?
The cheapest voice AI platform depends on what the buyer already has and what the quoted rate includes. There is no single winner across a developer building one agent, a solo agency testing one client, and an agency operating 50 branded client workspaces.
- Choose Vapi or Retell direct when engineering control, provider choice, and bring your own keys matter more than a finished agency layer.
- Choose a wrapper when a low starting subscription and multi-provider choice matter, and the agency is comfortable managing the provider account and component bill.
- Choose Trillet Studio when an agency needs a native white-label product for up to three workspaces, with a bundled AI-stack rate and a $99 platform fee.
- Choose Trillet Agency when unlimited workspaces, one native platform, included compliance, orchestration, and predictable model costs matter more than selecting each component.
The cheapest white-label voice AI comparison applies these trade-offs specifically to budget selection. The important word is “cheapest for this configuration,” not merely “cheapest.”
How Should an Agency Compare Quotes?
An agency should compare vendors with one worksheet that fixes minutes, channels, countries, client count, model quality, transfer time, concurrency, and compliance requirements. Any blank input can hide a cost difference.
- Record monthly AI minutes and transferred minutes separately.
- Split web, bring your own telephony, US phone, and international traffic.
- Name the STT, LLM, and TTS configuration for component-priced vendors.
- Apply included minutes once at the account level.
- Add the platform subscription, client-seat charges, phone numbers, concurrency, and compliance add-ons.
- Measure onboarding, maintenance, billing, and support hours during a real trial.
- Recalculate at current volume and at the next two growth milestones.
For agencies that then need to turn input costs into client retainers and usage markups, the voice agent pricing strategy guide covers packaging and margin design.
Frequently Asked Questions
How much does an AI voice agent cost per minute?
An AI voice agent can cost from roughly $0.07 per minute for an economical component configuration to more than $0.30 with premium models and voices, before any agency subscription. Compare platform, STT, LLM, TTS, telephony, and add-ons on the same basis.
Is Trillet's $0.12 per minute price all-inclusive?
No. It includes Trillet's platform, STT, LLM, and TTS, but excludes telephony. Web and bring your own telephony calls add no Trillet telephony fee, US Trillet telephony starts at $0.014 per minute, and international rates vary.
What happens to Trillet pricing after a call transfers?
The $0.12 AI usage charge stops when the call transfers to a human. The transferred portion is then billed at $0.05 per minute.
Why does Vapi advertise $0.05 per minute?
Vapi's $0.05 per minute is its platform and hosting fee. STT, LLM, TTS, and telephony are separate, so the actual call cost depends on the selected providers and models.
Should included minutes be applied to every agency client?
No. Trillet's 300 included Agency minutes form one shared account pool. Subtract them once from total monthly AI usage before multiplying the remaining minutes by $0.12.
Updated for August 2026: rebuilt the guide around the verified platform, STT, LLM, TTS, telephony, and transfer boundaries; added web, bring your own telephony, and baseline US phone scenarios; corrected included-minute math; and added named 5, 10, 20, and 50-client assumptions.