Free tool
Cost per usable response calculator
Form builders bill per response. Bots do not know that, and they arrive first. Price up to three plans on your own volume and your own junk rate, and see the number the pricing page does not show you: what you pay per response you can actually sell to.
Runs in your browser. Nothing you type is sent anywhere, stored, or logged — there is no request to send it in. Built by the team behind the dishonest dashboard.
How this is calculated
Every figure above comes from the arithmetic below. No weighting, no model, no numbers of ours mixed into yours.
Per plan
overage responses = max(0, submissions − included) monthly bill = plan price + overage responses × overage rate per response = monthly bill ÷ submissions usable = submissions × (1 − junk share) per usable = monthly bill ÷ usable
The two cost figures share a numerator and differ only in the denominator. The gap between them is the junk rate, expressed in dollars.
What the junk costs you
spent on junk = monthly bill × (junk ÷ submissions) allowance eaten by junk = min(included, junk)
The second line is the one that stings on a capped plan. An allowance is consumed in arrival order, and a bot filling a form at 3am consumes it exactly as a buyer would.
The comparison
cheapest bill = the lowest monthly bill cheapest per usable = the lowest cost per usable response flip = those are different plans
Where the defaults come from
There are no vendor prices in this tool, deliberately. Third-party claims about pricing in this category are frequently wrong. We found two widely circulated figures about a major form builder’s free tier and its spam protection that are contradicted by that company’s own live pricing page, and both are still being repeated. Rather than join in, we ask you to type in the numbers from the page you are looking at. Note the date you did it; these change.
The example plans — $29 for 1,000 responses, $99 for 10,000 — are shaped like plans that exist, and are not any particular vendor’s. The 30% junk default is a placeholder, not a benchmark; see the note on the spam cost calculator for why we do not publish a number there.
Verified context for why the junk share is not zero: bad bots were 40% of internet traffic in 2025, up from 37%, and automated requests are around 57.5% of HTML traffic. That is the web your form sits on, not a measurement of your form.
What this cannot tell you
It prices one month at one volume. Allowances create step changes rather than a smooth curve, so the ranking can flip on a single busy month and flip back. If your traffic is seasonal, run it at your peak as well as at your average.
It does not model what happens when you hit a hard cap. Some plans bill overage; others simply stop accepting submissions, which does not cost you money — it costs you the leads, which is worse and is not a number this tool can produce.
And it deliberately ignores everything else about the plans. Seats, logic limits, whether exports are paywalled, and whether the sync to your CRM fails loudly or silently all matter more than a few dollars a month. This page prices one axis; it is not a buying decision.
For what the junk costs you outside the software bill — the media spend and the rep hours — see the form spam cost calculator.
Why we built this
Every number on this page is one your form builder could have told you and didn’t.
Endpoint Forms is an open-source form builder for marketers: forms built to convert, data that goes wherever you need it, and every submission carrying what it turned out to be worth. It is not shipped yet. The waitlist is where we tell you when it is.