Smith.ai vs Synthflow (2026): which should you pick?
As of Nov 12, 2026, Smith.ai grades higher than Synthflow: 2.0 against 1.8 out of 4.0.
Checked Nov 12, 2026 · graded Nov 12, 2026 by ToolGPA
Smith.ai grades higher on the free plan. Synthflow grades higher on value for money. They get the same grade on features, ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Smith.ai
Phone answering by an AI receptionist, with live agents as an option
Which one is for you
Pick Smith.ai if
- Fits if you get fewer than 25 calls a month and want them answered
- Works for law firms and service businesses that use Clio or Calendly
Look elsewhere if
- Pricey if calls grow, as 75 calls is $150 a month on AI Pro
- Tight if you want a free try with no card, since the Free plan needs one
- Pricey if you want people, because live-agent plans start at $300 a month for 30 calls
- Watch out: the 30-day money-back on human plans excludes overage calls and is capped at $1,000
Pick Synthflow if
- Fits if you want white-label voice agents under one annual contract
- Makes sense if you use Five9, Salesforce or HubSpot
Look elsewhere if
- Not for you if you want to try it, as the page says no free plan and no trial
- Skip it if you are a small business, since every deployment starts on an Enterprise contract
- Not for you if you want per-minute pricing, because the page says there is none
- Watch out: HIPAA is self-attested in the vendor's own Trust Center summary
How we grade them
| 2.0GPASmith.aiFair | 1.8GPASynthflowWeak | |
|---|---|---|
| Value for money | DAI Pro is $150 a month for 75 calls, about three times the dearest tenth's $52 start. Calls cost $2.00 on that plan. | CNo price is published. The pricing page says it is an annual enterprise agreement with no per-minute rate. |
| Free plan and trial | CFree has 25 answered calls a month with no expiry, then $3.00 a call, and it needs a credit card to sign up. | FNo free plan and no trial, in the vendor's own words. |
| Features | CScreening, lead qualification, scheduling and live agents on top. Human escalation on the Free plan is a paid add-on. | CVoice agents, telephony options, white labelling and launch support. The listing shows no published usage caps. |
| Ease of use | CNo store rating on record, and you connect a number, scheduling and intake tools. | CNo store rating on record, and every deployment starts as an enterprise rollout. |
| Platforms and integrations | BWeb, with Clio, Filevine, Calendly, HubSpot, Salesforce and Zapier listed. | BWeb, with Cal.com, Five9, Zoom, HubSpot, Salesforce and Zapier listed. |
| Best for | answering a small number of calls with AI, humans optional | companies that will sign an annual voice-agent contract |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Smith.ai and Synthflow. How we grade
Where they differ
- Smith.ai also covers AI support agent and appointment booking.
At a glance
| Smith.ai | Synthflow | |
|---|---|---|
| Pricing | Free plan | Paid |
| Starts at | $150 per month for 75 AI-answered calls | Not published |
| Free plan | Free AI plan: 25 answered calls a month with no expiry, then $3.00 per call. A credit card is required to sign up. | None |
| Free trial | None listed | None listed |
| Web | ||
| Made by | Smith.ai | Synthflow AI |
| Price read from | smith.ai | Not confirmed |
| Checked | Nov 12, 2026 | Nov 12, 2026 |
Worth knowing
Smith.ai
- The Free plan stops at 25 answered calls a month; extra calls cost $3.00 each.
- Human-first plans are pay-per-call at $7 or more per call; overage runs $8.50 to $11.50 per call.
- Human escalation on the Free plan is an opt-in add-on rather than included.
- The 30-day money-back guarantee on the human-first plans excludes overage calls and is capped at $1,000.
Synthflow
- No prices are published. The pricing page says it is an annual enterprise agreement with no free plan, no trial and no per-minute rate.
- Every new deployment starts on an Enterprise contract, so it is not set up for self-serve small-business use.
- HIPAA is listed as self-attested in the vendor's own Trust Center summary.
Key features
Smith.ai
- AI call answering
- An AI receptionist picks up calls around the clock, screens spam, qualifies callers against criteria the business sets, and routes or transfers them.
- Live agents when needed
- Hybrid and human-first tiers bring in live North American agents, either for new-client calls or for every call, at higher per-call rates.
- Appointment scheduling
- The free plan lists AI scheduling with Calendly and similar tools. On the human-first plans, booking an appointment is a per-call add-on at $1.50.
- Quality Studio
- Lets a business test how the AI handles calls before going live. It is included on the free plan.
- CRM and intake integrations
- Call details go to a CRM or Zapier, with Clio, Filevine and Lawmatics named. Human-first plans include the first CRM; each extra one costs $0.50 per call.
- Add-ons billed per call
- Human-first plans price extras per call, such as a dedicated Spanish line at $1.00, call recording at $0.25 and conflict checks at $0.50.
Synthflow
- Voice agents for calls
- Agents handle customer service, reception, answering service, concierge, appointment booking and IVR use cases over the phone.
- Telephony options
- The contract can use Synthflow Native Telephony, SIP trunking or approved enterprise telephony, with routing, escalation and fallback logic.
- White label
- BPOs and software platforms can run it under their own brand, with a workspace per client and one analytics dashboard across them.
- Launch support
- Where the agreement includes it, Synthflow's forward-deployed engineers implement, test and launch agents with your team. Deployments go live in weeks.
- Security and compliance
- The Trust Center lists SOC 2 Type 2, ISO 27001, GDPR, HIPAA (self-attested) and PCI DSS v4.0.1, with ISO 42001, DORA and the EU AI Act in progress.
Plans
Smith.ai
Free$0
AI-first. 25 calls a month, then $3.00 per call. Call screening, lead qualification, scheduling and Quality Studio testing.
AI Pro$150
per month for 75 calls, AI-first
$2.00 per call. Adds dedicated onboarding, live phone, email and chat support, and custom SMS branding. Larger blocks cost less per call.
AI Enterprise$500
per month for 300 calls, AI-first
$1.67 per call. Smith.ai builds and runs a custom setup, with a success manager and multi-location support.
Human-first Starter$300
per month for 30 calls, live agents
Live receptionists, 1 free transfer destination. $11.50 per call over 30.
Human-first Basic$810
per month for 90 calls, live agents
2 free transfer destinations. $10.50 per call over 90.
Human-first Pro$2,100
per month for 300 calls, live agents
10 free transfer destinations. $8.50 per call over 300.
Synthflow
Pricing could not be confirmed. See synthflow.ai.
Common questions
Which is cheaper, Smith.ai or Synthflow?
As of Nov 12, 2026, Smith.ai starts at $150 per month for 75 AI-answered calls, and Synthflow has no price we could confirm.
Which has a free plan, Smith.ai or Synthflow?
As of Nov 12, 2026, only Smith.ai has a free plan. Synthflow does not.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.