Estimate corrections, partnerships, or support — we reply within 2 business days.
Wrong cost or margin? Send the page URL + source. We fix publicly.
Tool vendors, communities, educators — tell us about your audience.
Spotted an error in our estimates? Send the page URL + a public source.
Fastest for attachments & screenshots.
How fast do you reply?
Within 2 business days.
Do you take guest posts?
We don't publish guest posts. We welcome data corrections with sources.
Are your numbers guaranteed?
No — all figures are illustrative estimates. See our disclaimer and methodology.
Is my data shared?
No. See Privacy Policy.
