Smith.ai vs Synthflow AI
Smith.ai starts $2500/mo cheaper than Synthflow AI.
Both pages checked by August 19, 2026
- Smith.aiAI + human backup
- $0/mo
- AI Receptionist — Free plan
- Smith.ai sells small and mid-sized businesses two products off one platform: an AI Receptionist that answers, qualifies and books 24/7 with escalation to its North America-based Live Agent Network, and a fully human Virtual Receptionist service, both billed per call rather than per minute.
- Synthflow AIAI only
- $2500/mo
- Enterprise plan
- Enterprise voice AI platform with in-house telephony for automating inbound and outbound calls, sold through sales-scoped contracts rather than published self-serve plans, with the agent designed, tested and launched by the customer in Synthflow's Flow Designer or Prompt Builder.
The differences that matter
- Smith.ai is ai + human backup; Synthflow AI is ai only. That is the real decision here, not the price.
- Smith.ai can put a human on the line; Synthflow AI is bot-only.
Feature by feature
| Capability | Smith.ai | Synthflow AI |
|---|---|---|
| Live transfer | Yes | Yes |
| Books appointments | Yes | Yes |
| Text follow-up | Yes | Yes |
| Outbound calls | Yes | Yes |
| Spanish | Yes | Yes |
| Human backup | Yes | No |
| Call recordings | Yes | Yes |
| Transcripts | Yes | Yes |
| Spam screening | Yes | unstated |
| Custom voice | Yes | Yes |
| API | Yes | Yes |
"unstated" means the vendor doesn't claim it in their own documentation. It is not the same as no — it means nobody will put it in writing.
Smith.ai plans
| Plan | Published price | Includes | Over that |
|---|---|---|---|
| AI Receptionist — Free | $0 mo | 25 calls | 25 calls/mo ($3.00/call after that) |
| AI Receptionist — Pro (75 calls) | $150 /mo — $2.00/call (~2–3 calls/day) | 75 calls | $2.50 |
| AI Receptionist — Pro (150 calls) | $270/mo | 150 calls | $2.30 |
| AI Receptionist — Enterprise (300 calls) | $500 /mo — $1.67/call (~10 calls/day) | 300 calls | $2.17 |
| AI Receptionist — Enterprise (500 calls) | $800/mo | 500 calls | $2.10 |
| AI Receptionist — Enterprise (1,000+ calls) | Custom | — | Custom |
| Virtual Receptionist (human) — Starter | $300 / month | 30 calls | Overage: $11.50/call over 30 |
| Virtual Receptionist (human) — Basic | $810 / month | 90 calls | Overage: $10.50/call over 90 |
| Virtual Receptionist (human) — Pro | $2,100 / month | 300 calls | Overage: $8.50/call over 300 |
| Virtual Receptionist (human) — Enterprise | Custom | — | — |
Synthflow AI plans
| Plan | Published price | Includes | Over that |
|---|---|---|---|
| Enterprise | Enterprise contracts start at $30,000 annually(annual billing) | — | — |
Smith.ai sources
- AI Receptionist plans & pricing (tiers, per-call rates, feature table, FAQ)smith.ai · read August 19, 2026
- Virtual Receptionist plans & pricing (tiers, overage, add-ons, FAQ)smith.ai · read August 19, 2026
- Pricing hub (AI-first vs human-first toggle, add-on price list, money-back guarantee, porting)smith.ai · read August 19, 2026
- AI Receptionist product page (capabilities, live agent network, integrations FAQ)smith.ai · read August 19, 2026
- All features listsmith.ai · read August 19, 2026
- Integrations directorysmith.ai · read August 19, 2026
- Sitemap — enumerates 147 /integrates-with/ integration pagessmith.ai · read August 19, 2026
- Why us / leadership — "we started out in Palo Alto, CA", fully remotesmith.ai · read August 19, 2026
- Privacy policy (entity name Smith.ai, Inc.; no address published)smith.ai · read August 19, 2026
Synthflow AI sources
- Pricing page (Enterprise-only; "Enterprise contracts start at $30,000 annually"; scoping variables and contract inclusions)synthflow.ai · read August 19, 2026
- Homepage (positioning, target industries, free-trial FAQ answer and PAYG statement)synthflow.ai · read August 19, 2026
- Docs: Billing Overview ("Synthflow uses sales-led pricing", legacy billing labels, do-not-quote-from-docs warning)docs.synthflow.ai · read August 19, 2026
- Docs: Usage and Billing (per-second measurement, minute aggregation with carryover, flat 5s for no-answer, call-state billing table, chat at 5 AI messages per minute, allowances and carryover)docs.synthflow.ai · read August 19, 2026
- Docs: Concurrency (concurrency vs CAPS, "Scoped with Synthflow", no published defaults)docs.synthflow.ai · read August 19, 2026
- Docs: Languages (transcribers Deepgram and Synthflow STT, full supported-language list)docs.synthflow.ai · read August 19, 2026
- Docs: Integrations overview (GoHighLevel, Salesforce, HubSpot, Zendesk, Freshworks, Cal.com, Stripe, WhatsApp, ElevenLabs, Zapier, Make, Bubble, OpenAI/Anthropic/Azure BYOK, telephony)docs.synthflow.ai · read August 19, 2026
- Docs: Logs (call recordings and transcripts, live monitoring, CSV export, opt-out of saving recordings)docs.synthflow.ai · read August 19, 2026
- Docs: Getting started (BELL framework — the customer builds, evaluates and launches)docs.synthflow.ai · read August 19, 2026
- Docs: Custom pricing / reseller plans (Stripe reselling deprecated September 15, 2026; configurable subaccount plans, included minutes, concurrency caps, trials up to 200 minutes)docs.synthflow.ai · read August 19, 2026
- Docs index (call transfer TEL/SIP/dynamic, real-time booking, post-call SMS, in-call SMS/WhatsApp messaging, campaigns/batch calling, IVR handling, telephony and SIP integrations, Platform API)docs.synthflow.ai · read August 19, 2026
- Imprint (operating entity AgentFlow AI GmbH, Kurfürstendamm 15, 10719 Berlin; HRB 255004 B)docs.synthflow.ai · read August 19, 2026