Per-Number vs Per-Seat vs Per-Location Answering Pricing

You have three locations, two phone numbers at each, and a team of six. The vendor’s pricing page says $99 a month. Your quote says $594. Somewhere between the pricing page and the quote, the vendor counted something you did not expect. The unit the vendor counts, per number, per agent seat, per location, or per concurrent call, is one of the least discussed and most expensive details in AI answering pricing.

The four ways vendors count you

Per-number pricing charges for each phone number connected to the service. This is the oldest model, inherited from human answering services where each number meant a separate script and separate routing. It punishes businesses with many numbers: the main line, the Google Business number, the tracking numbers on ads, the fax-era line you never cancelled. Five numbers at $49 each is $245 before a single call is answered.

Per-agent or per-seat pricing charges for each person on your team who uses the dashboard, receives transfers, or gets notifications. This model comes from software, not telecom, and it fits businesses where the AI is really a team tool. The trap is the definition of a seat: some vendors count every employee with a login, including the owner who checks the dashboard once a month. Others count only staff who receive live transfers. The difference can double the seat count.

Per-location pricing charges per physical site, common with vendors built for restaurants and franchises. Slang.ai, for example, prices per location rather than per call. This is clean for multi-site businesses and terrible for a single location with heavy volume, since you pay the location price whether you get 40 calls or 400.

Per-concurrent-call or capacity pricing charges for how many calls the AI handles at once. This is the fairest model for spiky businesses and the hardest to find on pricing pages, because it requires the vendor to explain what happens when call six arrives while five are in progress.

How the counting changes the quote

Take a typical small home-services business: two locations, three numbers (main line plus two ad tracking numbers), and four staff who take transfers. On per-number pricing at $49 a number, the base is $147 a month. On per-seat pricing at $29 a seat, it is $116, or $174 if the vendor counts the owner and the bookkeeper. On per-location pricing at $99 a location, it is $198. Same business, same calls, quotes ranging from $116 to $198 before usage. None of these numbers appears on the pricing page’s headline.

The ad tracking numbers deserve special attention. Many businesses accumulate tracking numbers from past campaigns and never disconnect them. Under per-number pricing, each one is a monthly charge for a line that might ring twice a month. Before signing a per-number plan, audit your numbers and disconnect the dead ones. It is the easiest money in this whole exercise.

What to ask on the sales call

Ask what the billable unit is, in one sentence, and get the answer in the quote. Then ask the three follow-ups that catch the surprises: do test numbers, forwarding numbers, and toll-free numbers count the same as local numbers? Does a staff member with view-only dashboard access count as a seat? And when you add a number mid-contract, is it prorated or does it trigger a plan change?

Also ask about the direction you plan to grow. If you are opening a second location next year, find out now whether that doubles the bill or adds a small increment. If you plan to run call tracking on every ad campaign, per-number pricing will tax every experiment. The pricing model should fit the business you are becoming, not just the one you are.

Which model fits which business

Single location, one main number, small team: per-number is usually cheapest, because you are paying for one unit. Multiple ad tracking numbers or several lines: per-seat or per-location tends to win, because the number count is what inflates per-number quotes. Multi-location with similar volume per site: per-location is the most predictable. Spiky volume with few numbers: look for capacity or per-call models, where quiet numbers cost you nothing.

And if a vendor will not tell you the unit plainly, that is information too. The vendors with the cleanest pricing say it in the first paragraph of the pricing page. The ones who make you book a demo to learn the unit are telling you the unit would have ended the conversation.

The bottom line

Before comparing prices, compare what is being priced: numbers, seats, locations, or capacity. Normalize every quote to your actual count of each, and the cheapest headline price often stops being the cheapest quote.