First, these are different categories
Smith.ai assumes you already have a phone number and forwards its calls to software that answers them. Nextiva sells the phone service itself: numbers, lines, texting, video meetings, and a mobile app, from $23 per user a month billed monthly, or $15 on a 12-month term. Out of the box, a Nextiva plan routes calls to your team; if nobody picks up, that is still a missed call. Answering starts when you add XBert, Nextiva's AI assistant, at $99 a month. The clearest proof these products are not rivals: Smith.ai's own site tells Nextiva customers to keep Nextiva and forward their calls to Smith.ai. You can have both.
The pages ranking for this search do not answer it
The top result for this comparison is Smith.ai's own page about web chat, not phone answering. The next one is Nextiva's blog ranking itself first, which lists Smith.ai at a flat $300 a month without mentioning that Smith.ai's automated plans start free and run $150 to $500. A third page quotes Smith.ai at $95 a month, a price that matches nothing Smith.ai publishes today. That is why every number here links to a live pricing page, with the date we checked stamped on the cost table.
Pricing: four billing models in one decision
This comparison hides four different meters. Nextiva's phone plans bill per user, so the price grows with headcount, not call volume. XBert bills per interaction: $99 a month covers 100, then $0.99 each, and an interaction means a call over 30 seconds or a text or chat with three or more replies. Smith.ai bills per call: free for 25 calls a month, then $150 on Pro, about $2.00 a call, with its all-human product starting at $300 a month for 30 calls. And a per-minute service like ours bills only talk time, so short calls cost cents. None of these is trickery, but they price the same month of calls very differently, which is what the table below shows.
Where Nextiva wins
- It replaces your phone service outright: lines, extensions, texting, video, and a mobile app. Neither answering service does any of that.
- One vendor for the phone system and the answering layer, with assisted setup at no extra fee.
- XBert covers calls, texts, and website chats under one $99 bundle with a clear overage rate.
- Serious compliance and scale: SOC 2, HIPAA, a 99.999% uptime claim, and 100,000+ businesses over 17 years.
Watch for: the advertised $15 per user needs a 12-month term, the price multiplies with every user you add, and the XBert pages advertise neither Spanish answering nor spam screening. If all you need is calls answered, you are buying a phone system to get an add-on.
Where Smith.ai wins
- It exists to answer calls, and it is good at it: 25 million calls over ten-plus years.
- Human backup: over 500 employed receptionists in North America can step in on messy calls, as a paid per-call add-on.
- English and Spanish answering plus spam screening on every plan, including the free one.
- Works with the phone setup you already have, including Nextiva. Setup takes about 15 minutes with free simulated test calls first.
Watch for: per-call pricing adds up at volume, and the free plan needs a card on file. One law-firm owner on Reddit put it plainly: "Smith.ai became too expensive for what it is." And it will not replace your phone system; you still pay for one somewhere.
EveryDial does one job: it answers for home-services businesses, books the work on the $49 plan, and sends you the details of every call. Billing is by the minute, so a quick call costs cents, and extra minutes cost the same rate as included ones. Try it free for 7 days.
How to choose
- Pick Nextiva if you need a real phone system for a team and want the answering layer from the same vendor.
- Pick Smith.ai if your phone service is fine and you want proven answering with human backup behind it.
- Pick ours if you run a small trade business and want booking plus per-minute billing. The answering service for plumbers and HVAC answering service pages show how it handles a real job call.
Whichever way you go, price it against your real call volume first. Our free missed call calculator shows what a month of unanswered calls already costs you, which makes any of these monthly fees easier to judge.