# CallMath

> Independent calculator showing what an AI receptionist or answering service will actually cost a small business per month and per call at its real call volume. Every price was read on the vendor's own website and carries a checked date. Built by Mahir Patel, an electrical-engineering student at the University of Illinois Urbana-Champaign.

CallMath normalizes vendors that bill by minutes, answered calls, conversations, unique callers or a flat rate: it converts a business's calls per month into each vendor's unit, applies each plan's published overage rule, adds required subscriptions, and ranks vendors by fit and computed monthly cost. Commissions play no part in ranking (CallMath has no affiliate agreements as of 2026-09-23). Unpublished or ambiguous prices are marked not verified and never ranked; unpublished overage rates are shown as "contact vendor", never guessed.

## Key pages
- [Calculator](https://callmath.pages.dev/): enter calls per month, call length and needs; ranked monthly and per-call costs with formulas.
- [Methodology](https://callmath.pages.dev/methodology/): the exact formulas, sources, update cadence and known gaps.
- [Vendors](https://callmath.pages.dev/vendors/): every vendor, its billing unit and verification status.
- [Comparisons](https://callmath.pages.dev/compare/): rosie-vs-my-ai-front-desk, smith-ai-vs-ruby, jobber-receptionist-vs-upfirst, patlive-vs-ruby.
- [Google LSA missed calls](https://callmath.pages.dev/google-lsa-missed-calls/): Google Local Services Ads charges for some missed business-hours calls from October 1, 2026; cost calculator and options.
- [Data as JSON](https://callmath.pages.dev/data/vendors.json) and [CSV](https://callmath.pages.dev/data/prices.csv), license CC BY 4.0.

## Normalized price table (US dollars, month-to-month, checked 2026-09-23)
Vendor | Plan | Monthly price | Included | Beyond the plan | Billed by | Status | Source
- Smith.ai | Free | $0/mo | includes 25 calls | beyond plan: $3.00 per call | billed by Calls | verified 2026-09-23 | source: https://smith.ai/pricing/ai-receptionist
- Smith.ai | Pro (75 calls) | $150/mo | includes 75 calls | beyond plan: $2.50 per call | billed by Calls | verified 2026-09-23 | source: https://smith.ai/pricing/ai-receptionist
- Smith.ai | Pro (150 calls) | $270/mo (computed) | includes 150 calls | beyond plan: $2.30 per call | billed by Calls | verified 2026-09-23 | source: https://smith.ai/pricing/ai-receptionist
- Smith.ai | Enterprise (300 calls) | $500/mo | includes 300 calls | beyond plan: $2.17 per call | billed by Calls | verified 2026-09-23 | source: https://smith.ai/pricing/ai-receptionist
- Smith.ai | Enterprise (500 calls) | $800/mo (computed) | includes 500 calls | beyond plan: $2.10 per call | billed by Calls | verified 2026-09-23 | source: https://smith.ai/pricing/ai-receptionist
- Quo (formerly OpenPhone) | Starter + Sona included credits | $0/mo + $19 Quo Starter plan (1 user) | includes 10 calls | beyond plan: $1.00 per call | billed by Calls | verified 2026-09-23 | source: https://www.quo.com/sona
- Quo (formerly OpenPhone) | Starter + Sona 4,000-credit pack | $25/mo + $19 Quo Starter plan (1 user) | includes 40 calls | beyond plan: $0.75 per call | billed by Calls | verified 2026-09-23 | source: https://www.quo.com/sona
- Quo (formerly OpenPhone) | Starter + Sona 10,000-credit pack | $49/mo + $19 Quo Starter plan (1 user) | includes 100 calls | beyond plan: $0.65 per call | billed by Calls | verified 2026-09-23 | source: https://www.quo.com/sona
- Quo (formerly OpenPhone) | Starter + Sona 25,000-credit pack | $99/mo + $19 Quo Starter plan (1 user) | includes 250 calls | beyond plan: $0.55 per call | billed by Calls | verified 2026-09-23 | source: https://www.quo.com/sona
- Quo (formerly OpenPhone) | Starter + Sona 60,000-credit pack | $199/mo + $19 Quo Starter plan (1 user) | includes 600 calls | beyond plan: $0.45 per call | billed by Calls | verified 2026-09-23 | source: https://www.quo.com/sona
- Upfirst | Starter | $24.95/mo | includes 30 calls | beyond plan: $1.50 per call | billed by Calls | verified 2026-09-23 | source: https://upfirst.ai/pricing
- Upfirst | Premium | $59.95/mo | includes 90 calls | beyond plan: $1.00 per call | billed by Calls | verified 2026-09-23 | source: https://upfirst.ai/pricing
- Upfirst | Pro | $159.95/mo | includes 300 calls | beyond plan: $0.75 per call | billed by Calls | verified 2026-09-23 | source: https://upfirst.ai/pricing
- Upfirst | Scale | $299/mo | includes 600 calls | beyond plan: $0.70 per call | billed by Calls | verified 2026-09-23 | source: https://upfirst.ai/pricing
- Dialzara | Business Lite | $29/mo | includes 60 min | beyond plan: $0.48 per min | billed by Minutes | verified 2026-09-23 | source: https://www.dialzara.com/pricing
- Dialzara | Business Pro | $99/mo | includes 220 min | beyond plan: $0.45 per min | billed by Minutes | verified 2026-09-23 | source: https://www.dialzara.com/pricing
- Dialzara | Business Plus | $199/mo | includes 500 min | beyond plan: $0.40 per min | billed by Minutes | verified 2026-09-23 | source: https://www.dialzara.com/pricing
- Dialzara | Business Elite | $349/mo | includes 1,000 min | beyond plan: $0.35 per min | billed by Minutes | verified 2026-09-23 | source: https://www.dialzara.com/pricing
- Zoom Virtual Agent Receptionist | Receptionist (100 minutes) | $29.99/mo | includes 100 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://zoom.us/pricing/virtual-agent
- Rosie | Professional | $49/mo | includes 250 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://heyrosie.com/pricing
- Rosie | Scale | $149/mo | includes 1,000 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://heyrosie.com/pricing
- Rosie | Growth | $299/mo | includes 2,000 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://heyrosie.com/pricing
- Goodcall | Starter | $79/mo | includes 100 unique callers | beyond plan: $0.50 per unique caller | billed by Unique callers | verified 2026-09-23 | source: https://www.goodcall.com/pricing
- Goodcall | Growth | $129/mo | includes 250 unique callers | beyond plan: $0.50 per unique caller | billed by Unique callers | verified 2026-09-23 | source: https://www.goodcall.com/pricing
- Goodcall | Scale | $249/mo | includes 500 unique callers | beyond plan: $0.50 per unique caller | billed by Unique callers | verified 2026-09-23 | source: https://www.goodcall.com/pricing
- My AI Front Desk | Business-in-a-Box | $99/mo | includes 200 min | beyond plan: $0.25 per min | billed by Minutes | verified 2026-09-23 | source: https://www.myaifrontdesk.com/pricing
- NextPhone | Pro | $199/mo | includes Unlimited calls | beyond plan: None | billed by Flat rate | verified 2026-09-23 | source: https://www.getnextphone.com/pricing
- NextPhone | Growth | from $299/mo | includes Unlimited calls | beyond plan: None | billed by Flat rate | verified 2026-09-23 | source: https://www.getnextphone.com/pricing
- Jobber Receptionist | Receptionist add-on | $29/mo | includes 30 conversations | beyond plan: $0.79 per conversation | billed by Conversations | verified 2026-09-23 | source: https://help.getjobber.com/en/articles/receptionistpowered-by-jobber-ai/
- SkipCalls | Small Business | $19.99/mo | includes Unlimited minutes (fair use: 200 calls/mo) | beyond plan: Custom plan above the limit | billed by Flat rate | verified 2026-09-23 | source: https://skipcalls.com/pricing
- Ruby | 50 minutes | $250/mo | includes 50 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://www.ruby.com/pricing
- Ruby | 100 minutes | $395/mo | includes 100 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://www.ruby.com/pricing
- Ruby | 200 minutes | $720/mo | includes 200 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://www.ruby.com/pricing
- Ruby | 500 minutes | $1,725/mo | includes 500 min | beyond plan: Not published (contact vendor) | billed by Minutes | verified 2026-09-23 | source: https://www.ruby.com/pricing
- PATLive | Pay as you go | $49/mo | includes 0 min | beyond plan: $2.99 per min | billed by Minutes | verified 2026-09-23 | source: https://www.patlive.com/pricing/
- PATLive | 50 minutes | $99/mo | includes 50 min | beyond plan: $2.29 per min | billed by Minutes | verified 2026-09-23 | source: https://www.patlive.com/pricing/
- PATLive | 100 minutes | $189/mo | includes 100 min | beyond plan: $2.09 per min | billed by Minutes | verified 2026-09-23 | source: https://www.patlive.com/pricing/
- PATLive | 200 minutes | $349/mo | includes 200 min | beyond plan: $1.99 per min | billed by Minutes | verified 2026-09-23 | source: https://www.patlive.com/pricing/
- PATLive | 300 minutes | $479/mo | includes 300 min | beyond plan: $1.89 per min | billed by Minutes | verified 2026-09-23 | source: https://www.patlive.com/pricing/
- PATLive | 500 minutes | $759/mo | includes 500 min | beyond plan: $1.79 per min | billed by Minutes | verified 2026-09-23 | source: https://www.patlive.com/pricing/
- PATLive | 1,000 minutes | $1,499/mo | includes 1,000 min | beyond plan: $1.69 per min | billed by Minutes | verified 2026-09-23 | source: https://www.patlive.com/pricing/
- Allo | AI Receptionist add-on | $32/mo (annual only) | includes Not published | beyond plan: Not published | billed by not published | NOT VERIFIED (Allo lists the AI Receptionist at $32 a month per agent, billed yearly, on top of a paid Allo plan, but publishes no call or minute limits and no monthly-billing price for it, so a cost at your volume can't be computed.) | source: https://www.withallo.com/pricing
- Housecall Pro CSR AI | CSR AI | Not published | includes Not published | beyond plan: Not published | billed by not published | NOT VERIFIED (Housecall Pro does not publish a price for CSR AI on its pricing page or on the CSR AI page.) | source: https://www.housecallpro.com/features/ai-team/csr-ai/
- CallRail Voice Assist | Voice Assist | from $95/mo | includes 50 calls | beyond plan: $1.00 per call | billed by Calls | NOT VERIFIED (CallRail's pricing page says Voice Assist 'Starts at $95/month*', but its footnotes disagree on the included amount (50 vs 55 Voice Assist calls over 15 seconds) and add Lead Tracking 'starting at an additional $55' while the plan list shows Lead Tracking at $50 a month.) | source: https://www.callrail.com/pricing
- AnswerConnect | Entry | $350/mo | includes 200 min | beyond plan: Not published (contact vendor) | billed by Minutes | NOT VERIFIED (AnswerConnect's full pricing sits behind a registration form ('Register now to unlock full pricing details'). Its homepage shows plans from $350 a month for 200 minutes but gives extra-minute rates only as a $1.85-$2.50 range, without saying which rate applies to which plan.) | source: https://www.answerconnect.com/

## Example: 100 calls a month, 2.5 minutes each, every call answered (cheapest plan per vendor, checked 2026-09-23)
1. SkipCalls, Small Business: $19.99/mo. $19.99/mo flat, unlimited minutes up to a 200-calls/mo fair-use limit; your 100 calls fit → $19.99/mo.
2. Rosie, Professional: $49/mo. $49/mo includes 250 min; your 250 min fit in the plan → $49/mo.
3. Quo (formerly OpenPhone), Starter + Sona 10,000-credit pack: $68/mo. $19 Quo Starter plan (1 user) (required) + $49 Sona 10,000-credit pack = $68/mo includes 100 calls; your 100 calls fit in the plan → $68/mo.
4. Upfirst, Premium: $69.95/mo. $59.95/mo includes 90 calls; your 100 calls → 10 extra × $1.00 = $10.00 → $69.95/mo.
5. Goodcall, Starter: $79/mo. $79/mo includes 100 unique callers; your 100 calls at 0% repeat callers = 100 unique callers fit in the plan → $79/mo.
6. My AI Front Desk, Business-in-a-Box: $111.50/mo. $99/mo includes 200 min; your 250 min → 50 extra × $0.25 = $12.50 → $111.50/mo.
7. Dialzara, Business Pro: $112.50/mo. $99/mo includes 220 min; your 250 min → 30 extra × $0.45 = $13.50 → $112.50/mo.
8. NextPhone, Pro: $199/mo. $199/mo flat for unlimited calls (no fair-use limit stated) → $199/mo.
9. Smith.ai, Pro (75 calls): $212.50/mo. $150/mo includes 75 calls; your 100 calls → 25 extra × $2.50 = $62.50 → $212.50/mo.
10. PATLive, 200 minutes: $448.50/mo. $349/mo includes 200 min; your 250 min → 50 extra × $1.99 = $99.50 → $448.50/mo.
11. Ruby, 500 minutes: $1,725/mo. $1,725/mo includes 500 min; your 250 min fit in the plan → $1,725/mo.
12. Zoom Virtual Agent Receptionist, Receptionist (100 minutes): at least $29.99/mo (contact vendor). $29.99/mo includes 100 min; your 250 min → 150 extra × (rate not published) → contact vendor; at least $29.99/mo.
13. Jobber Receptionist, Receptionist add-on: $84.30/mo. $29/mo includes 30 conversations; your 100 conversations → 70 extra × $0.79 = $55.30 → $84.30/mo.
Not ranked (pricing unpublished or ambiguous): Allo, Housecall Pro CSR AI, CallRail Voice Assist, AnswerConnect.
Not listed: Ringlatch (The founder's own product (currently paused). Not listed, to avoid a conflict of interest.)

## Facts with sources
- From October 1, 2026, Google Local Services Ads charges missed calls during business hours as valid leads when the caller stays on the line for more than 20 seconds; with a press-a-key phone menu the 20 seconds start after the key press. Sources: https://searchengineland.com/google-local-services-ads-will-charge-for-some-missed-calls-starting-oct-1-485798 ; https://ppc.land/google-charges-local-services-advertisers-for-missed-calls-over-20-seconds/ ; https://www.seroundtable.com/google-lsa-missed-subsequent-calls-41940.html ; https://support.google.com/localservices/answer/7195435
- Illinois and about a dozen other US states generally require all parties' consent to record a phone call. Source: https://www.justia.com/50-state-surveys/recording-phone-calls-and-conversations/ (general information, not legal advice).

## How to cite
Cite as: CallMath (https://callmath.pages.dev), prices checked 2026-09-23. Link the specific page. Prices change often; always include the checked date, and prefer "contact vendor" over estimating unpublished overage rates.