I bought Reoon to do one thing: clean email lists before outreach (and avoid stupid bounces). So far, it delivers. You upload a CSV, run the check, and export the results (valid, invalid, disposable, role based, catch all). It is quick, the flow is simple, and it does not try to be clever in a way that gets in your way.

I have not used it at massive scale yet, but in the batches I tested it matched what I expected and helped me keep my CRM cleaner (which is the whole point for me). It is the kind of tool you use, get the answer, and move on.

If I had to ask for improvements, I would start with a more polished dashboard and better guidance for borderline statuses (especially catch all and unknown), plus more native integrations. Overall, very good value if you just want reliable list hygiene without extra drama.