Inbox capacity planner
How many new leads a day your mailboxes can actually sustain, and which of the two ceilings is currently binding.
Open it↗Free · nothing gated
Two calculators
for the two questions people ask.
Both answer in the browser, neither asks for anything, and where a number came from somebody else's page we name them and link it.
No email address, no account, nothing submitted anywhere
The tools
What each one answers, and what it is built on
The second column is the part that matters. A calculator is only as good as the numbers behind it, so both say where theirs come from.
| Tool | What you get out | Built on |
|---|---|---|
| Inbox capacity planner | A number, usually about a fifth of the send volume people plan against | Arithmetic. Nothing to source, and every step of it is on the page |
| Appointment setting cost calculator | A cost per meeting for each model, and the volume at which a retainer beats us | Five UK publishers' own pages, read on 3 September 2026 and linked |
Appointment setting cost calculator
What a booked meeting costs under three models: pay per meeting, a flat retainer, or hiring an SDR.
Open itQuestions about the tools
Straight answers. If yours isn't here, ask it on the call: we'd rather tell you no than sell you the wrong thing.
No. There is no form on either tool. Both compute their answer in your browser, and the answer is the thing of value, so asking for an address to release a number already on screen would be theatre.
The capacity maths is also published as a free Claude skill, alongside 10 more covering targeting, offers, copy and compliance. Most of those are adapted from open-source work and credited on their pages. What we do for money is run the campaigns, priced on the pricing page.