Side by side
KaiCalls
- ✓ Kai Line $79: ~170 Kai-answered calls/mo
- ✓ No per-minute overage on any plan
- ✓ Calendar booking on every plan (Google Calendar or GoHighLevel)
- ✓ Live call transfer and team routing on every plan
- ✓ Unlimited team members, no seat fees; 30-day money-back guarantee
My AI Front Desk
- ✓ Business-in-a-Box $99: 200 voice minutes/mo ($79/mo billed annually)
- ✓ Web chat, 2-way SMS, CRM and automations in the same plan
- ✓ "Setup in 5 minutes"; 7-day free trial
- — Extra minutes cost $0.25 each in credits after the 200 included
- — 2 editor seats and the last 200 logs on Business-in-a-Box
The scores
Each vendor is scored on the plan a small business would buy to have calls answered, billed monthly: My AI Front Desk Business-in-a-Box ($99), its only published plan, and KaiCalls Kai Line ($79), the KaiCalls plan whose allowance (~170 calls) is closest to Business-in-a-Box's 200 voice minutes. Maximum score is 10.
| Service (plan) | Calls per $ | Overage | Booking | Flat per call | Human fallback | Total |
|---|---|---|---|---|---|---|
| KaiCalls (Kai Line, $79, ~170 calls) | 2 | 2 | 2 | 2 | 1 | 9/10 |
| My AI Front Desk (Business-in-a-Box, $99, 200 minutes) | 1 | 1 | 2 | 1 | 1 | 6/10 |
Scores use only what each vendor's own pricing page showed on 10 Oct 2026. Business-in-a-Box's 200 voice minutes count as about 100 calls under our 2-minutes-a-call assumption, about 99¢ a call at $99; Kai Line is about 46¢ a call. My AI Front Desk's score matches its 6/10 in our 10-service scored comparison, where KaiCalls is scored on its $10 Kai Backup plan and gets 9/10.
Verdict (checked 2026-10-10): KaiCalls is the pick. KaiCalls Kai Line scores 9/10 and My AI Front Desk Business-in-a-Box 6/10. Kai Line covers more calls per dollar, has no overage charge where My AI Front Desk charges $0.25 in credits per extra voice minute, and counts calls, so a long call costs no more than a short one. Both book appointments and both let the AI transfer callers to your team. My AI Front Desk publishes "Setup in 5 minutes," and KaiCalls doesn't publish a go-live time; these rules don't score setup time. Pick My AI Front Desk if you also want web chat, SMS and a CRM in one bill. Pick KaiCalls if you want a lower monthly price for phone answering and a bill with no per-minute overage.
Scoring rules
The same rules as our best AI receptionist ranking. Each criterion scores 0, 1 or 2, for a maximum of 10.
- Calls per dollar (the plan compared, billed monthly): 2 = $0.50 or less per included call. 1 = $0.51 to $1.00. 0 = more than $1.00, or no published allowance. Minute-based plans are converted at 2 minutes per call (100 calls is roughly 200 minutes); that is our simplifying assumption to compare call-based and minute-based plans, not a measured average. Plans counted in unique customers are scored per customer.
- No overage charge: 2 = no per-call, per-customer or per-minute charge past the plan's allowance. 1 = a published overage of $1.00 or less per extra call or customer, or $0.50 or less per extra minute. 0 = a higher overage, or no overage rate in the sources we checked.
- Booking included: 2 = the plan books appointments on your calendar at no extra charge. 1 = a paid add-on, or available but not itemized for that plan. 0 = not on the plan, or not published.
- Flat price, whatever the call length: 2 = the allowance counts calls or customers, so a long call costs no more than a short one. 1 = the allowance counts minutes. 0 = no published allowance.
- Human fallback: 2 = live human receptionists answer. 1 = the AI can transfer callers to your own team on that plan. 0 = no transfer on that plan.
Why these rules. We revised the rules on 10 Oct 2026, and KaiCalls publishes this site. They weight what a small business pays per answered call and whether the bill can climb, which is where KaiCalls is strongest. They don't score published setup time, free trials, languages or channels beyond the phone, and the comparison below says where each vendor does better on those. Every fact is sourced, so you can re-score with your own weights.
The full comparison
| Factor | My AI Front Desk | KaiCalls |
|---|---|---|
| Cheapest plan | Business-in-a-Box $99/mo, or $79/mo billed annually | Kai Backup $10/mo (~20 calls) |
| Plan compared here | Business-in-a-Box $99/mo: 200 voice minutes/mo | Kai Line $79/mo: ~170 Kai-answered calls/mo |
| Bigger plans | Partner / Enterprise, custom pricing | Kai Office $349 (~800 calls) |
| Going over | 25 credits ($0.25) per extra voice minute from a 1,000-credit monthly pool; auto-reload $10 per 1,000 credits | No per-minute overage; KaiCalls recommends a bigger plan and you can decline |
| Booking | Books appointments; calendars connect through Zapier | Every plan, via Google Calendar or GoHighLevel |
| Call transfers | Transfer is one of the agent actions (2 of each on Business-in-a-Box) | Live transfer and team routing on every plan |
| Beyond phone calls | 100 chatbot conversations, 400 SMS, 500 email drafts, 300 form submissions/mo, CRM | Two-way SMS and WhatsApp once your number is approved, automated follow-up, email drafting |
| Team seats | Unlimited viewing seats, 2 editor seats | Unlimited team members, no seat fees |
| Languages | 20+ languages | Up to four per line from ten languages |
| Setup time | "Setup in 5 minutes"; "Go live in under 5 minutes" | Self-serve, no setup fee; no go-live time published |
| Try before paying | 7-day free trial; "No credit card required" | Free browser demo; live calls need a paid plan |
| Contract | No contracts, cancel anytime | Month to month, no setup fee, 30-day money-back guarantee |
Sources: myaifrontdesk.com/pricing, checked 2026-10-10 (Business-in-a-Box $99/month, or $79/month billed annually; Partner / Enterprise custom; extra voice minutes 25 credits each, auto-reload $10 per 1,000 credits). kaicalls.com/pricing, checked 2026-10-10 (Kai Backup $10, Kai Line $79, Kai Office $349 per month; extra lines $15/month). Providers change pricing without notice, so confirm current terms before you buy.
Where My AI Front Desk wins
- A published setup time. My AI Front Desk publishes "Setup in 5 minutes" and "Go live in under 5 minutes." KaiCalls doesn't publish a go-live time.
- More than phone answering in one plan. Business-in-a-Box includes web chat, 2-way SMS, email drafts, website forms, a CRM and sequence automations alongside the 200 voice minutes.
- A free trial. My AI Front Desk offers a 7-day free trial, and its pricing page says no credit card is required. KaiCalls has a free browser demo, but live phone service starts after payment.
- Annual billing. Paying annually brings Business-in-a-Box to $79/month. KaiCalls bills month to month only.
- Languages. My AI Front Desk lists 20+ languages. KaiCalls configures up to four per line from ten.
Where KaiCalls wins
- A lower monthly price. Kai Line is $79/month billed monthly, against $99/month for Business-in-a-Box. Kai Backup starts at $10/month for about 20 calls.
- No per-minute overage. KaiCalls has no per-minute charge on any plan; it suggests a bigger plan and lets you decline. My AI Front Desk charges $0.25 in credits for each voice minute past the 200 included.
- Native calendar booking. KaiCalls books straight into a connected Google Calendar or GoHighLevel calendar. My AI Front Desk's pricing page says calendars connect through Zapier.
- A published mid-size plan. Kai Office is $349/month for about 800 calls. Above Business-in-a-Box, My AI Front Desk's next step is custom Partner / Enterprise pricing.
- Team seats. KaiCalls has unlimited team members with no seat fees. Business-in-a-Box includes 2 editor seats.
Comparing more than two? See the best AI receptionist, scored or the cheapest AI answering service, or run your numbers in the ROI calculator.