ZeroBounce vs.

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Klean13 or ZeroBounce – which one should you choose? The two email checkers seem similar at first glance, but there are a few important differences between them.

Let’s start with the price: $97 to validate 10,000 email addresses with Klean13 versus $80 to clean the same number of contacts with ZeroBounce.

We wondered if Klean13 offers access to more features since its prices are higher. Not the case.

For instance, the company doesn’t disclose whether it removes duplicate contacts for free. Also, there’s no mention of abuse emails detection – emails that ZeroBounce isolates. They belong to serial complainers, so if you want to avoid the risk of spam complaints, ZeroBounce gives you the option to remove them from your list.

Furthermore, Klean13 does not append any data to your email list, like ZeroBounce does.

One thing the two email verifiers have in common is that they both detect disposable and catch-all email addresses.

Klean13 does not state how accurate its email validator is and does not have a money-back guarantee. As for support, at ZeroBounce, you can connect with a live person within seconds, which is not the case with Klean13. The company’s representatives respond only during normal working hours.

See the comparison below for more information.

Price per 10,000 email verifications
Email Bounce Detection
Spam Trap Detection
Free deduplication
Data security: Unique key for each file uploaded in the system; military grade encryption algorithm to safeguard all files and personal information.
Email Abuse Detection
Email Data Append
Toxic Domain Detection
Social Append
IP Information Append
Disposable Email Detection
Catch-All Domain Detection
Email Gender Append
24/7 Support
Accuracy Rate
Money-Back Guarantee
Activity Data - "Identify Openers, Clickers, Forwarders and Unsubscribers on your list"

$80 USD


$97 USD






Comparison as of August 2021

Disclaimer: The third party's name is utilized for comparison purposes only and is the trademark of its respective owner. ZeroBounce claims no rights whatsoever in the use of such name and/or any related trademarks. ZeroBounce is not affiliated with the third party referenced on this page.