AI Voice Agent Platform Cost Calculator — Vapi vs Retell vs Bland.ai
✓ Last verified: 2026-08-12· Source: vendor pricing pages & industry benchmark roundups, Aug 2026· Reference estimate — report change → Vapi, Retell and Bland.ai are three real, commercially available voice-agent orchestration platforms, and none of them price the same way. Vapi and Retell are pay-as-you-go per-minute rates that stack an LLM, telephony and voice cost on top of a low advertised base. Bland.ai instead publishes three flat subscription-plus-per-minute tiers — Start, Build, Scale — where the cheapest one depends entirely on how many minutes you actually run per month. Enter your volume below to see the all-in monthly cost on all three platforms and all three Bland.ai tiers side by side, and which one wins at your specific scale.
Call volume
Vapi & Retell — effective all-in rate ($/min)
Bland.ai isn't a single editable rate — it publishes three flat tiers (Start $0/mo + $0.14/min, Build $299/mo + $0.12/min, Scale $499/mo + $0.11/min), modeled simultaneously below so you can see which one wins at your volume.
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cheapest option at this volume—Vapi / mo
—Retell / mo
—cheapest Bland.ai tier / mo
Bland.ai — all three tiers at your volume
| Tier | Subscription | $/min | Cost at your volume |
|---|
Breakeven points (informational, not tied to the minutes entered above): Start → Build overtakes at 299 / (0.14 − 0.12) = 14,950 min/mo. Build → Scale overtakes at (499 − 299) / (0.12 − 0.11) = 20,000 min/mo.
Cost by platform across volume — where the crossovers happen
Same rates as above, swept across four representative monthly volumes, so you can see which platform/tier is cheapest at each scale.
| Minutes/mo | Vapi | Retell | Bland Start | Bland Build | Bland Scale | Cheapest |
|---|
How this connects to other tools
This site has two other voice-agent calculators, and this one deliberately doesn't overlap with either. The AI voice agent cost calculator builds a stack from raw model prices — you pick an STT model, an LLM and a TTS model separately and it adds up what running your own custom pipeline would cost per minute; it doesn't price any packaged platform at all. The AI Voice Agent ROI Calculator goes the other direction — it collapses platform cost into a single blended "AI platform + setup $/mo" input and spends its effort comparing that one number against what a human agent handling the same volume would cost, to answer whether switching to AI pays off; it doesn't care which vendor supplies that number or how the vendor structures its pricing internally. This calculator is the piece neither of those covers: it prices three real, named, commercially available orchestration platforms — Vapi, Retell and Bland.ai — each with a genuinely different pricing structure, against each other at your specific monthly volume, and tells you which one (and which Bland.ai tier) is actually cheapest. The Realtime Voice API Cost Calculator is closer to the first tool: it prices a single realtime speech-to-speech API model directly by audio minutes, again without comparing packaged platforms.
How this calculator works
Vapi and Retell are priced the same simple way here: cost = minutes per month × your effective all-in $/min rate. That rate is deliberately editable rather than fixed, because each platform's advertised per-minute base only covers the orchestration layer — the LLM tokens, telephony minutes and voice model you choose stack on top of it, and the reported effective all-in range for real deployments runs $0.10–$0.30/min for Vapi and $0.07–$0.31/min for Retell depending on those choices.
Bland.ai is priced differently on purpose: it publishes three flat tiers, each a fixed monthly subscription plus a per-minute rate — Start ($0 + $0.14/min), Build ($299/mo + $0.12/min) and Scale ($499/mo + $0.11/min). The calculator computes all three costs at your entered volume simultaneously and flags whichever is lowest as "cheapest Bland.ai tier," then compares that figure against Vapi and Retell to find the overall cheapest option across all five price lines. It also computes two breakeven volumes that don't depend on what you typed in the minutes field: the minute count at which Build's lower per-minute rate has saved enough to cover its $299/mo fee versus Start (299 / (0.14 − 0.12) = 14,950 min/mo), and the minute count at which Scale's further discount covers the extra $200/mo it costs over Build ((499 − 299) / (0.12 − 0.11) = 20,000 min/mo). Average call length only drives the informational "calls/month" figure (minutes ÷ average length) — it plays no role in any of the cost math.
Reading the numbers
At the default inputs — 5,000 minutes/month, Vapi at $0.175/min, Retell at $0.19/min — the five monthly costs come out to Vapi $875.00, Retell $950.00, Bland Start $700.00 (5,000 × $0.14), Bland Build $899.00 ($299 + 5,000 × $0.12), and Bland Scale $1,049.00 ($499 + 5,000 × $0.11). Bland Start is cheapest across all five lines at this volume — $700/mo beats Vapi, Retell and both other Bland tiers — simply because 5,000 minutes hasn't reached the 14,950-minute point where Build's subscription starts paying for itself.
That's the crossover insight this calculator exists to show: Bland Start wins at low-to-mid volume purely by avoiding a subscription fee, not because its per-minute rate is the lowest of the three Bland tiers — it isn't. Once monthly volume passes 14,950 minutes, Build's $299/mo has been earned back by its 2¢/min saving and becomes cheaper than Start (at 15,000 min: Build $2,099 vs. Start $2,100 — just barely, since 15,000 is only 50 minutes past the breakeven point). Push volume further, past 20,000 minutes/month, and Scale's extra $200/mo over Build pays for itself too (at 25,000 min: Scale $3,249 vs. Build $3,299 vs. Start $3,500). The practical takeaway: don't default to whichever Bland.ai tier "sounds right" for your company size — the cheapest one is a function of minutes/month alone, and it changes at two specific, calculable thresholds.
Frequently asked questions
Why are the Vapi and Retell rates in this calculator ranges instead of one fixed number?
Because the advertised per-minute price on either platform's pricing page is only the orchestration base, not what actually lands on your invoice. Vapi's own published starting rate is around $0.05/minute, but that figure covers Vapi's platform fee alone — it does not include the LLM tokens burned generating each response, the telephony/carrier minutes used to actually place or receive the call, or the cost of a premium third-party voice if you pick one instead of a standard voice. Stack those three on top of the base and the effective all-in cost widely reported across builders and industry benchmark roundups lands somewhere in the $0.10 to $0.30 per minute range depending on which LLM and which voice you chose. Retell's pay-as-you-go base starts around $0.07+/minute and the same stacking pushes its effective all-in figure to roughly $0.07 to $0.31/minute. Because that add-on stack is different for every builder's model and voice choices, this calculator asks for your own effective all-in rate rather than pretending a single published base number is what you'll actually pay — the defaults (0.175 for Vapi, 0.19 for Retell) are reasonable starting midpoints to edit once you know your real numbers.
Why does the cheapest Bland.ai tier change as call volume grows?
Because two of Bland.ai's three published tiers charge a flat monthly subscription on top of a lower per-minute rate, and that subscription only pays for itself once enough minutes flow through to amortize it. Start has no subscription fee and costs $0.14/minute, so at low volume it wins simply by avoiding a fixed cost that has nothing to spread it across. Build costs $299/month plus $0.12/minute, and the extra $0.02/minute it saves versus Start only overtakes that $299 fee at 299 / (0.14 − 0.12) = 14,950 minutes/month — below that line Start is still cheaper, above it Build is. Scale costs $499/month plus $0.11/minute, and its extra $200/month versus Build only pays for itself once the further $0.01/minute saving accumulates enough: (499 − 299) / (0.12 − 0.11) = 20,000 minutes/month, the point where Scale overtakes Build. So the cheapest tier walks Start → Build → Scale as volume climbs past those two breakeven points, purely because a fixed monthly fee needs a growing number of minutes underneath it before the lower per-minute rate it buys is worth paying for.
How is this different from the site's existing AI Voice Agent ROI Calculator?
The AI Voice Agent ROI Calculator treats the AI platform's cost as a single blended input — one 'AI platform + setup $/mo (fixed)' number you type in — and its whole job is comparing that one number against what a human agent handling the same call volume would cost, to answer 'is switching to AI worth it.' It deliberately doesn't care which vendor supplies that number or how the vendor's pricing is structured internally. This calculator does the opposite: it never asks you to collapse platform cost into one figure. Instead it prices three real, named, commercially available platforms — Vapi, Retell and Bland.ai — each with its own genuinely different pricing structure (Vapi and Retell are pay-as-you-go per-minute rates, Bland.ai is three separate subscription-plus-per-minute tiers), and finds which one is actually cheapest at your specific monthly minute volume, and which Bland.ai tier to pick. In short: the ROI calculator answers 'AI vs. human,' this one answers 'which AI platform, and which of its plans.'
What doesn't this calculator capture?
Cost isn't the only variable that separates these platforms, and this tool only prices the dollar side. It doesn't account for per-platform feature differences that can matter more than a few cents per minute for a given use case — concurrency limits on simultaneous calls, which voices and languages are actually supported, native integrations with your CRM or telephony provider, latency and interruption handling, or how each platform's function-calling and webhook tooling fits your build. It also doesn't verify pricing in real time: Vapi and Retell's published per-minute rates are pay-as-you-go bases, and the 'effective all-in' figure you should actually use depends on your own LLM model choice, voice provider and telephony setup, which is exactly why those two fields are editable rather than fixed — the defaults here are a starting estimate to calibrate against your own measured bill, not a guarantee of what you'll be charged. All three vendors also change pricing and tier structure fairly often, so treat any specific dollar figure as a snapshot, not a contract.