If you're validating emails at scale, Reoon is a game-changer. I use it via API with Clay to streamline the verification process in outbound workflows. While it doesn't have a native integration with Clay (yet), it's still accessible through Clay’s HTTP request feature.

Here’s the kicker: if you’re running massive outbound campaigns, the savings on email verification alone can easily justify a higher-tier Clay plan. You not only get more credits and features in Clay, but you also ensure your email data is clean, which helps keep your domain reputation intact.