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.
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. Enterprise 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 honest 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.
When none of these is the answer
A solo operator or a two-person shop taking a handful of calls a week does not need an answering service at all. Voicemail with a same-day callback habit, or a shared cell number with call forwarding, covers that volume for free. Paying $250 a month for 50 minutes of coverage only makes sense once missed calls are costing you real business, not before.
If your calls need a database behind them, not only an answer, an answering service alone will not solve that. This comparison covers the call-answering layer only. SalesCrew is not included above because its own outbound calling runs through Vapi and its inbound phone and receptionist features are on the roadmap, not shipped; it is not yet a candidate in this category.
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 BAA 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.