AIRIN vs Smith.ai
Smith.ai is the incumbent in this matchup: years in market, human receptionists behind the AI, and the deepest legal-intake footprint in the category. AIRIN is the newer specialist: an AI-first receptionist made by Atomic Apps AI, packaged specifically for insurance agencies, HVAC, and plumbing businesses, with voice, SMS, email, and phone-payment follow-up managed for you.
The honest framing: these two overlap on the core job — answer every call, capture the lead, book the appointment — but they sit at different points on three axes: human involvement, vertical depth, and price point.
At a glance
AIRINOur product
AIRIN, the AI receptionist from Atomic Apps AI, for HVAC, plumbing, and insurance businesses — published self-serve pricing from $59/mo with a 14-day free trial by default, plus a live website chat widget, a private-beta voice widget, and phone payments built in.
Pricing: From $59/mo
Best for: HVAC, plumbing, and insurance businesses that want published self-serve pricing and a receptionist that rings their own team first — with vendor-assisted onboarding still available for multi-location or custom needs.
Smith.ai
The established hybrid: AI receptionist plans plus North America-based human receptionists, strongest in legal and professional services.
Pricing: From $0/mo
Best for: Law firms and professional-services businesses that want a proven vendor and the option of real humans behind the AI.
Feature comparison
"Not published" means the vendor doesn't document it — we don't guess. Verified 2026-09-03.
| Feature | AIRINOur product | Smith.ai |
|---|---|---|
| 24/7 call answering | ✓ | ✓ |
| Appointment scheduling | ✓Includes two-way Google Calendar sync — Pro and Max tiers only, not included on Reception | ✓ |
| SMS follow-up / texting callers | ✓In-call and post-call texting, including Pay by Phone payment links | PartialCall summaries and notifications; text answering on some plans |
| Email follow-up | ✓ | PartialCall summaries by email |
| CRM / back-office integrations | PartialNamed connectors (ServiceTitan, Housecall Pro, Jobber for trades; EZLynx, Vertafore, AMS360, HawkSoft, QQCatalyst, NowCerts, Applied Epic for insurance AMS) — setup is a separate line item, from $499 one-time or $83/mo x 6 | ✓100+ integrations incl. Clio, Lawmatics, HubSpot |
| Live transfer to a human | ✓Agent-first routing rings the business's own team first (configurable 5–30s window), falling back to AIRIN if nobody answers; live warm transfer with call summary also included — Pro and Max tiers only, not on Reception. No staffed human-receptionist add-on. | ✓Live-agent handoff at $3/call on AI plans; human plans available |
| Spanish / bilingual support | ✓English and Spanish included on every plan; Vietnamese, Tagalog, Portuguese, and Korean available per business | ✓Bilingual human agents |
| Custom call scripts & flows | ✓Call flows configured per business during onboarding | ✓ |
| Outbound calling | ✕ | ✓Callbacks and outreach campaigns |
| Call analytics dashboard | ✓Searchable transcripts and lead dashboard on every plan; full call recording is Pro and Max only | ✓Summaries, transcripts, and dashboard |
| Industry-specific packaging | ✓Insurance, HVAC, and plumbing live; law, dental, and medical publicly roadmapped | ✓Strongest in legal intake |
| Self-serve signup | ✓Self-serve checkout across all three tiers with a guided setup wizard and a 14-day free trial by default; multi-location/custom is quote-led | ✓Month-to-month AI plans |
| Live website chat widget | ✓AI Web Chat: live website chat widget trained on the business's own pages. Staff-quoted pricing scoped to knowledge-base size and site coverage — no published self-serve price yet | Not published |
| On-site voice widget (tap-to-talk) | PartialVIA: tap-to-talk voice widget for the business's own site, Pro and Max tiers. Private beta — no published pricing, not self-serve | Not published |
| In-call phone payments | ✓Pay by Phone (Pro and Max): AIRIN texts the caller a secure payment link mid-call; $49 one-time activation + 0.725%/transaction, no monthly fee | Not published |
Human fallback vs AI-first
Smith.ai's structural advantage is people. Its AI plans offer a free 25-call/mo tier and paid tiers with live-agent handoff, and full human-receptionist plans exist for businesses that want staffed coverage. AIRIN is AI-first, not human-staffed: on Pro and Max, agent-first routing rings the business's own phone first and only falls back to AIRIN if nobody answers, and calls can also be transferred live to the team — but there is no staffed receptionist tier behind the AI the way Smith.ai offers, and Reception (AIRIN's cheapest tier) doesn't include live transfer at all.
The flip side is cost: human involvement is why Smith.ai's Enterprise and human-receptionist plans run into hundreds to low-thousands monthly, while AI-only services price lower.
Vertical depth
Smith.ai's specialization is legal — Clio and Lawmatics integrations and years of intake experience. AIRIN's specialization is insurance agencies (carrier-aware claim routing, AMS connectors, quote intake) and HVAC/plumbing (job-type triage, appointment booking). If you're a law firm, Smith.ai's ecosystem is built for you; if you're an insurance agency or a trades business, AIRIN's packages target your workflow specifically.
Price point
AIRIN publishes three self-serve tiers: Reception $59/mo (200 min, $0.65/min overage), Pro $139/mo (500 min, $0.50/min overage), and Max $259/mo (1,000 min, $0.45/min overage) — no setup fee, and a 14-day free trial by default on every tier, card required. Smith.ai's AI receptionist starts with a genuinely free tier (25 calls/mo, $3.00/call overage), then Pro at $150/mo and Enterprise at $500/mo, billed per-call rather than per-minute.
Watch the billing unit either way: Smith.ai meters by call regardless of length, AIRIN meters by minute — so compare against your actual average call length and volume, not just the sticker. Note also that Reception, AIRIN's cheapest tier, doesn't include booking, calendar sync, live transfer, or call recording; those require Pro or Max.
More ways to compare
See also AIRIN vs Goodcall, AIRIN vs Rosie, and AIRIN vs Sonant AI, or browse the full best AI receptionists guide for every segment pick. For the mechanics of ring-your-team-first routing specifically, see agent-first call routing, explained.
Verdict
AIRIN
Choose AIRIN if you're an insurance, HVAC, or plumbing business that wants an industry-tuned AI receptionist with published self-serve pricing, a 14-day free trial by default, and SMS/email/payment follow-up available — and you're comfortable stepping up to Pro if you need booking or live transfer.
Smith.ai
Choose Smith.ai if you're in legal or professional services, want to try a real free tier first (25 calls/mo), or a staffed human receptionist behind the AI — not just your own team — is non-negotiable.
Frequently asked questions
- Which is cheaper, AIRIN or Smith.ai?
- It depends on tier and volume. Smith.ai's AI receptionist has a genuine free tier (25 calls/mo, $3.00/call overage), then $150/mo Pro and $500/mo Enterprise. AIRIN's tiers are $59–$259/mo with per-minute overage that falls as you move up. The billing units differ — per-call vs. per-minute — so compare against your real call pattern, not the sticker.
- Do both offer 24/7 answering?
- Yes. Both answer around the clock; the difference is what's behind the AI — Smith.ai can escalate to human agents on its human-receptionist plans, AIRIN rings your own team first (agent-first routing, Pro/Max only) and transfers to them live.
- Is this comparison independent?
- No, and we disclose that prominently: this site is published by Avant-Garde Global LLC, the company behind Atomic Apps AI, which makes AIRIN. Every factual claim here is sourced, and Smith.ai's strengths — a real free tier, humans on staff, legal depth — are stated plainly.