where to purchase/access charitable donor mailing lists?

Apologies if this has been asked before, I tried searching here but couldn’t find much. I’m looking for marketing companies like this one (LeadsPlease) who share lists of donors that have a history of donating to similar organizations and would be likely to donate to yours. I’m particularly looking for places that would share these lists for free, and then take a percentage of the donations that come from the list, but also would like to know about sites where you can just purchase lists. Would you recommend this as a good way to grow our donor base?

submitted by /u/khoaipotato
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