Just finished testing out Clearout. Overall, I found the email verification tool to be fast and easy to use. And of course, you'll save $$$ relative to other tools. The biggest issue right now is the lack of integrations besides MailChimp and Zapier but I know they'll be rolling out more soon.

Some use cases include:

1) Cold outreach
2) Cold emai llst
3) Leads collected offline

On the other hand, I didn't find the lead finder tool to be very useful. Issues include:

1) No advanced search options
2) Few results relative to what would be expected (101 travel agencies in Mumbai, 88 hotels in Bogota, etc).
3) Email addresses tend to be fairly generic and not very useful for cold outreach.

So my bottom line is...buy Clearout for the email verification, not for the lead finder.

You can check out my full video review and demo here:
https://youtu.be/ZC_0j6ouXHI