Based on our record, Email List Verify should be more popular than Signifyd. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
There are third party solutions to fraud that actually work, providing chargeback insurance. Essentially, they screen transactions; if any approved transactions are chargebacked, they refund you. A good start point is https://signifyd.com We dropped in this solution on our e-commerce about 5 years ago; fraud has been a non existent problem. - Source: Hacker News / over 1 year ago
If you're not getting the right email addresses from ContactOut and it's bouncing back, you could always run the email addresses through something like emaillistverify.com to make sure they're valid before you try to email them. (you should do that always anyway to protect your email deliverability). Source: almost 2 years ago
Emaillistverify.com is the service I use. Source: almost 2 years ago
Riskified - eCommerce fraud prevention solution and chargeback protection guarantee for online merchants. Find out how we can help your company boost revenue from online sales using our machine-learning powered eCommerce fraud protection software.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Kount - eCommerce fraud detection & prevention
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Sift - Digital Trust & Safety enables your business to grow, innovate, introduce new products, features, and business models – without increased risk.
Email Verifier - Email verifier app lets you verify email.