Free tool
Freemail Revenue Loss Calculator
Free webmail and disposable signups convert worse and churn faster. Estimate the revenue leaking out of your list — Advanced mode lets you set the conversion gap and churn yourself.
How it works
- 1Enter list size, share of free/disposable emails and revenue per valid contact.
- 2Advanced: set the conversion gap and churn for free vs business addresses.
- 3See the estimated revenue those low-quality signups are costing you.
Questions
Frequently asked
Why do free/disposable signups cost money?
Disposable addresses never convert, and free webmail signups in B2B convert and retain worse than business addresses — yet they still cost you sends, support and skewed metrics.
Is this an exact figure?
It's an estimate from your inputs, meant to size the opportunity. Verifying and enriching signups at the form is how you stop the leak in practice.
Can I check a whole list at once?
This free tool checks one at a time. To verify a full list — email, phone and company together — upload a CSV to BounceBlock and preview your first 100 rows free.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.
100 free creditsNo credit cardCancel anytime