Best AI answering services
Compared on per-minute cost, what's included at the entry tier, and what happens to a call the AI can't finish.
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Vapi wins for a technical team building a custom answering flow and willing to assemble the model, voice and telephony pieces itself. For a business that wants call answering to just work without engineering time, a human-backed service like Ruby is the safer choice, at a much higher cost per minute.
The short answer
- AI voice platforms price per minute and get cheaper at volume; human-backed answering services price per plan and stay expensive at any volume.
- Vapi's advertised $0.05/minute platform fee is not the full cost. Add a language model, speech-to-text, text-to-speech and telephony, and a real deployment runs $0.07 to $0.25 a minute or more.
- A human-backed service like Ruby costs roughly $5 a minute at its lowest tier ($250/month for 50 minutes) but requires no setup and hands genuinely hard calls to a real person by default.
AI answering services compared
| Service | Starting price | Pricing model | Setup needed | Best for | Not for |
|---|---|---|---|---|---|
| Vapi | $0.05/min platform fee, usage-based | Per-minute, pay for your own model/voice/telephony on top | Build your own agent, voice and call flow | A technical team building a custom voice agent | Anyone who wants call answering with no setup |
| Retell AI | $0.07-$0.31/min all-in, $10 free credit | Per-minute, component pricing shown up front | Configure agent and knowledge base in their builder | A team that wants more pricing transparency than Vapi's raw platform fee | Enterprise-scale deployments (custom pricing above the self-serve tier) |
| Bland AI | $299/mo platform fee (Build plan) + $0.12/min talk time | Monthly platform fee plus per-minute usage, tiered | Plan around daily call and concurrency caps | A team that wants predictable monthly platform cost with usage on top | Low-volume users; the free Start tier caps at 100 calls a day |
| Ruby | $250/mo for 50 minutes | Flat monthly plan by minute allotment, human receptionists | None, live in days, not weeks | A business that wants a real person answering with zero setup | High call volume; cost per minute stays roughly $5 even at the top plan |
Figures checked on vapi.ai/pricing, retellai.com/pricing, bland.ai/pricing and ruby.com/pricing, September 2026. Smith.ai's pricing page did not load at fetch time and is omitted rather than guessed.
How each one fits
Vapi
The rawest option: a $0.05/minute orchestration fee, and you bring your own language model, speech-to-text, text-to-speech and telephony, either at cost or with your own API keys. That flexibility is also the catch. A production deployment typically runs $0.07 to $0.25 a minute once every component is priced in, and someone has to build and maintain the call flow. Not for: a business that wants answering configured for them rather than built by them.
Retell AI
Similar per-minute model to Vapi but with the component costs itemized up front: $0.055/min for voice infrastructure, $0.015/min for standard text-to-speech, plus add-ons for a knowledge base or PII removal. New accounts get $10 in free credit and 20 free concurrent calls, which is enough to test a real flow before paying. Not for: teams who want a flat, predictable monthly bill instead of metered usage.
Bland AI
The only one of the three AI platforms with a monthly platform fee on top of per-minute usage: $299/month on the Build plan, capped at 2,000 calls a day and 50 concurrent calls, with the per-minute rate dropping as you move up tiers. Bland's Enterprise plan adds on-premises deployment and a BAA. Not for: low-volume testing, since the free Start tier caps out fast at 100 calls a day.
Ruby
A human-backed virtual receptionist service, not an AI platform, included here because it is the alternative when a business needs a live person rather than a bot on the line. Plans run from $250/month for 50 minutes to $1,725/month for 500 minutes, all with the same features. Not for: anyone trying to minimize cost per minute at volume. Ruby's per-minute cost barely moves between tiers.
Smith.ai
A comparable human-and-AI hybrid answering service, generally priced in the $290-$2,000/month range by plan size according to third-party pricing trackers, but Smith.ai's own pricing page did not load for this comparison and the figure is not included in the table above as a result. Not for: use this entry only as a pointer to check smith.ai directly before deciding.
How to choose
Choose Vapi if you have developers and want to build your own voice agent from $0.05 a minute. Choose Retell AI if you want per-minute costs shown up front, with $10 of free credit to start. Choose Bland AI if you want a set monthly platform fee with usage on top. Choose Ruby if you want a real person answering with no setup, at $250 a month for 50 minutes.
Disclosure: SalesCrew is our product. It is the pipeline behind the call: every enquiry becomes a record with its source, and outbound calls run through Vapi. Inbound numbers route by business hours, and the AI receptionist answers, books and transfers on Vapi or Retell.
Questions
- Is an AI answering service cheaper than a human one?
- Usually per minute, yes. Vapi's platform fee is $0.05 a minute before you add a language model, speech-to-text, text-to-speech and telephony, which typically brings a real deployment to $0.07-$0.25 a minute all in. A human-backed service like Ruby starts at $250 a month for 50 minutes, which works out to $5 a minute at the entry tier. The AI options get cheaper per minute as volume grows; the human options do not.
- Can an AI answering service actually book an appointment?
- Some can, through a calendar integration configured at setup. That is a platform capability, not something every account gets by default, so check whether booking is part of the base plan or an add-on before assuming it works out of the box.
- What happens when the AI can't handle a call?
- It depends on the platform's transfer and escalation setup, which is usually configured per business rather than automatic. A service worth using lets you define what triggers a human handoff before it goes live, not after a caller has already hit a dead end.
- Do these services work for medical or legal intake?
- Some vendors offer HIPAA-oriented options at a cost premium (Vapi lists a $2,000/month HIPAA add-on), but you should confirm a signed business associate agreement and the vendor's actual compliance posture directly with them before using any answering service for regulated intake. Do not assume general availability means compliance coverage.
Want an AI phone receptionist on its own? See GreetKeeper at greetkeeper.com, also built by Hashlogics.