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Smith.ai vs Ruby: which one actually costs less
These two services do not bill the same thing. Smith.ai charges you for a call. Ruby charges you for a minute. Smith.ai's Starter (live agents) plan is $300 for 30 calls, so every call costs $10.00 whether it lasts forty seconds or eleven minutes. Ruby's entry plan is $250 for 50 minutes, which is $5.00 a minute. Divide one by the other and the whole decision comes down to a single number: how long your calls run.
The short answer. If your average call is longer than 2.0 minutes, Smith.ai costs less. If it is shorter, Ruby costs less. That threshold moves to 2.9 minutes once you are big enough for Ruby's 500 minutes plan, where the rate drops to $3.45 a minute. Everything below is the arithmetic behind those two numbers.
What one call costs on each service
This is the calculation that decides it. Smith.ai's column never moves, because the plan buys calls, not time. Ruby's columns climb with every minute, because the plan buys time, not calls.
| Call length | Smith.ai Starter (live agents) | Ruby Receptionist 50 | Ruby Receptionist 200 | Ruby Receptionist 500 |
|---|---|---|---|---|
| 1 minute | $10.00 | $5.00 | $3.60 | $3.45 |
| 2 minutes | $10.00 | $10.00 | $7.20 | $6.90 |
| 4 minutes | $10.00 | $20.00 | $14.40 | $13.80 |
| 6 minutes | $10.00 | $30.00 | $21.60 | $20.70 |
Working: Smith.ai $300 divided by 30 calls is $10.00 a call. Ruby $250 divided by 50 minutes is $5.00 a minute, so a four-minute call is 4 times $5.00, or $20.00. On Ruby's Receptionist 200 plan, $720 divided by 200 minutes is $3.60 a minute. Break-even against Smith.ai's $10.00 a call: $10.00 divided by $5.00 is 2.0 minutes, and $10.00 divided by $3.60 is 2.8 minutes.
A full month at 30 calls
Thirty calls is exactly what Smith.ai's Starter (live agents) plan holds, so its bill stays flat at $300 across every row. Ruby's bill depends on the minutes those calls consume. Because Ruby publishes no overage rate, the only predictable route is the plan that covers your minutes, which is what the table uses.
| Average call | Minutes used | Smith.ai | Ruby plan needed | Cheaper by |
|---|---|---|---|---|
| 1 minute | 30 | $300 | Receptionist 50 at $250 | Ruby by $50 |
| 2 minutes | 60 | $300 | Receptionist 100 at $395 | Smith.ai by $95 |
| 4 minutes | 120 | $300 | Receptionist 200 at $720 | Smith.ai by $420 |
| 6 minutes | 180 | $300 | Receptionist 200 at $720 | Smith.ai by $420 |
Read the first row carefully, because it is the one people get wrong. Thirty one-minute calls use 30 minutes, which fits Ruby's Receptionist 50 plan at $250. Smith.ai charges $300 for the same thirty calls. Short calls are where Ruby wins, and it wins by $50 a month.
A full month at 60 calls
Now Smith.ai's overage shows up, and it is the part of their pricing worth knowing before you sign. Going over your plan costs more per call than the calls inside it: $11.50 against $10.00. Sixty calls means the Starter (live agents) plan plus 30 extra calls at $11.50, so $300 plus $345 is $645. That is still cheaper than jumping to the Basic (live agents) plan at $810, so $645 is the honest figure.
| Average call | Minutes used | Smith.ai | Ruby plan needed | Cheaper by |
|---|---|---|---|---|
| 1 minute | 60 | $645 | Receptionist 100 at $395 | Ruby by $250 |
| 2 minutes | 120 | $645 | Receptionist 200 at $720 | Smith.ai by $75 |
| 4 minutes | 240 | $645 | Receptionist 500 at $1,725 | Smith.ai by $1,080 |
| 6 minutes | 360 | $645 | Receptionist 500 at $1,725 | Smith.ai by $1,080 |
Two pricing habits that cost more than the headline
Ruby rounds every call up to a full minute
Ruby's own page says receptionist minutes are billed in 60-second increments, rounded up to the next 60-second mark. A twenty-second call to ask about your opening hours costs a full minute. On the Receptionist 200 plan that is $3.60 for twenty seconds of work. Thirty of those calls in a month burn $108.00 of a $720 plan. If your callers ask short questions, the minute count on your invoice will run well ahead of the time you actually spent talking.
Smith.ai punishes you for going over
Most services charge less per unit outside the plan, or at least the same. Smith.ai charges more: $11.50 a call above 30 on Starter (live agents), $10.50 above 90 on Basic (live agents), $8.50 above 300 on Pro (live agents). The upside is that every one of those rates is published, so you can do this arithmetic yourself before signing. With Ruby you cannot.
What Ruby gives you that Smith.ai charges for
Ruby is more expensive per unit and better on inclusions, and pretending otherwise would be dishonest. Bilingual Spanish is included on every Ruby plan. Smith.ai adds $1.00 a call for the Spanish line on its human plans. Appointment booking is $1.50 a call at Smith.ai. Ruby also charges no activation or setup fee, and bundles scheduling and HIPAA handling that Smith.ai prices separately. On a 30-call month where every call is in Spanish and every call gets booked, Smith.ai's $300 becomes $375, which changes the answer in the two-minute row above.
What Smith.ai has that Ruby has no answer to
Ruby sells one thing: people answering phones. Smith.ai sells a price ladder that starts at zero. Its AI Receptionist Free tier costs $0 for 25 calls, and the AI Receptionist Pro tier is $150 for 75 calls, which works out at $2.00 a call. That is 5.0 times cheaper per call than putting a person on the line, from the same vendor, with the same phone number. If a chunk of your calls are routine, running AI first and humans behind it is a real option at Smith.ai and not an option at all at Ruby.
Who should pick which
Law firm or agency with long intake calls
Smith.ai. At six-minute calls Smith.ai charges $300 for thirty calls against $720 on Ruby's Receptionist 200 plan, a gap of $420 a month. Length is free at Smith.ai and expensive at Ruby.
Clinic or shop with lots of quick questions
Ruby. Thirty one-minute calls cost $250 at Ruby against $300 at Smith.ai. Ruby's rounding hurts here, but paying $10.00 for a forty-second call hurts more. Bilingual Spanish being included seals it if you need it.
Owner who wants the bill to be predictable
Smith.ai, or neither. Ruby publishes no overage rate at all, so a busy month is a blank cheque. Smith.ai publishes every rate. If both feel expensive, the honest answer is that a per-minute human service like AnswerConnect starts lower than either of them.
Check both prices before you commit
Prices on this page were read from each vendor's own pricing page on 2026-07-28. Vendors change plans without notice, so confirm the current numbers before you pay.
Is either one worth it? Check the number they are protecting
Both services only make sense if the revenue you stop losing is bigger than the bill. If the figure below comes out under $300 a month, neither of these plans is your next purchase.
You miss about 10 calls a week, and roughly 3 of those callers would have booked.
Where to go next
- Every Smith.ai plan and what it really costs
- Every Ruby plan, including the overage they do not publish
- Ruby vs AnswerConnect, where the per-minute gap gets much wider
- Smith.ai vs Abby Connect, the other vendor selling AI and humans side by side
- Six cheaper alternatives to Ruby and Smith.ai alternatives compared
- All published prices in one table
Frequently asked questions
Is Smith.ai cheaper than Ruby?
Only above a certain call length. Smith.ai's Starter (live agents) plan is $300 for 30 calls, which is $10.00 per call whatever its length. Ruby's smallest plan works out at $5.00 a minute and its largest at $3.45 a minute. That puts the break-even at 2.0 minutes against Ruby's entry plan and 2.9 minutes against its 500-minute plan. Calls longer than that favour Smith.ai. Shorter calls favour Ruby.
What does Ruby charge when you go over your minutes?
Ruby does not publish an overage rate anywhere on its pricing page. It confirms overage is billed after the fact but not at what price. Smith.ai publishes every rate: $11.50 a call over the Starter plan, $10.50 over Basic and $8.50 over Pro. If a predictable bill matters more to you than the headline price, that difference is the whole story.
Does Smith.ai or Ruby include Spanish?
Ruby includes bilingual Spanish on every plan. Smith.ai charges $1.00 per call for the Spanish line on its human plans and includes it on the AI plans. On a 30-call month where every caller speaks Spanish, that is $30 on top of the $300 Starter plan.
Which one suits a law firm better?
Intake calls run long, and Smith.ai does not charge for length, so a firm taking 30 intake calls of six minutes each pays $300 against $720 on Ruby's Receptionist 200 plan. Ruby earns its premium elsewhere: bundled Spanish, scheduling and HIPAA, no activation fee, and a brand your clients recognise. Smith.ai prices appointment booking at $1.50 a call on the human plans, so add that back before you decide.