Run the seat math.

Ten people is where flat pricing starts winning.

At a typical $25 per user per month, covering everyone who touches an incident in a 50-person company, about 35 people, costs $10,500 a year, and rationing down to just the rotation still costs $3,000. A flat plan covers all 50 for $2,400 a year. The crossover sits around ten people, below it per-seat is cheaper, above it every seat is money, and every person on flat pricing is free.

So you can re-run this with your own numbers, the per-seat rate is $25 per user per month, the middle of the $20 to $40 range the major on-call tools charge for their professional tiers. The company is 50 people. And access comes in three honest tiers, the on-call rotation itself (10 people), plus the service owners and leads who need to see and be reachable (25), plus everyone who actually touches an incident when one is running, stakeholders included (35).

Here is what reach costs, per year, at each tier:

Signal9 On-Call is a flat plan, $229 a month, or $2,400 a year billed annually, unlimited users, as of August 2026 (current numbers are always on the plans page). Same 50-person company, everyone covered:

Run the crossover, $229 a month buys about nine seats at $25. Below roughly ten people, per-seat pricing is genuinely cheaper, and a five-person team doing the math should reach that conclusion. That is not our market, and we would rather you know it from our own page than discover it in a spreadsheet. The seat math turns at ten and compounds from there, because headcount grows and the ladder grows with it.

The quiet property of per-seat pricing is that the bill scales with your headcount, not your incidents. Grow from 50 to 80 people and the rotation, the owners, and the watchers all grow with it, the bill climbs mechanically, with no one ever deciding to spend more on incident response. Flat pricing makes growth free and turns the one real cost, delivery, into a number you can see. Your incident volume does not care how many people you hired. Your pricing should not either.

The numbers above are the argument, Signal9 plans are flat because coverage should be an operational decision, not a budget line that grows with headcount. Whether ten people or all fifty can see the board and be reached is your call to make once, and the why behind the stance has its own field note.

How much does per-seat on-call software cost for a 50-person team? At a typical $25 per user per month, $3,000 a year if only the 10-person rotation gets accounts, $7,500 for 25 people including service owners and leads, and $10,500 a year for the roughly 35 people who actually touch incidents. Over three years the full-coverage figure reaches $31,500, and it grows with headcount.

At what team size does flat pricing beat per-seat? Around ten people, at typical rates, a $229 flat monthly plan equals about nine seats at $25 per user. Below that, per-seat is cheaper. Above it, flat pricing wins and the gap compounds, because on per-seat every additional responder, owner, or stakeholder is a new line item, while on flat pricing they cost nothing.

How much does Signal9 On-Call cost? As of August 2026, $229 per month, or $2,400 a year billed annually, flat, with unlimited users. Delivery such as SMS and voice paging is metered, with the numbers published up front. Current pricing is always on the Signal9 plans page, and adding people never costs a seat.