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ZeroBounce Reviews

Is ZeroBounce really accurate as everyone says? Check it out here

Expert's Reviews on ZeroBounce

ZeroBounce is a renowned US-based email verification service and one of the fastest-growing companies in the email verification industry (according to INC. 5000). Their API integration can validate any email addresses to stop unwanted signup and have cleaned email lists. Even they provide a well-managed API dashboard to look over the daily and monthly reports. Their A.I. technology is beneficial to get the score of your email address that is identified as the catch-all but quite risky to send through A.I. scoring you get a proper idea of whether to send an email on each email address or not.  ZeroBounce pricing is much higher in contrast to other providers like MyEmailVerifier & Debounce. While the other two verifies 10k emails in less than $30, Z.B. is asking $60 for the same.  Worried about your data privacy? You don't need to be with Zero Bounce. They are Swiss EU-US privacy shield certified vendors. There are only 2-3 vendors who are having this certificate.  Zero Bounce is a qualitative choice for the ones who look for extra information about the email validation results and informative analysis.


  • Good Accuracy

    ZeroBounce claims for 99% accuracy, and it actually gave 95% accuracy when we performed its auditing. This is what builds trustworthiness in the eyes of its users. With this, it stands at 2nd position immediately after MyEmailVerifier in terms of accuracy.

  • Highly Secured

    ZeroBounce stands ahead when we talk about users’ data security. It provides military-grade protection along with a data encryption facility at the time of email verification. Apart from that, it also removes your data immediately after 30 days from the email verification process.

  • Scoring Facility

    ZeroBounce uses A.I. to score email addresses from 0 to 10 based on how subscribers interact with your emails. 10 is considered as the best quality rating, while 0 is considered as the lowest quality rating. Based on this scoring, you can quickly know which contacts are good to target and whether they are likely to convert into your final customers or not.

  • Commendable Customer Support

    Just like MEV, ZeroBounce’s customer support is admirable. You can contact them through email, phone call (during their business hours), or through live chat (24/7/365). We got speedy replies in detail for the technical queries during the auditing. The response time is under 15minutes.

  • We have no limits on number of files or file sizes per day hour etc. no limits with ZB.

  • ZB unknown rate is under 1% consistently for the last 3 years.

  • Good Integration Facility

    It also lets its users integrate their ZeroBounce accounts with 45+ 3rd party applications, including well-known ESPs such as Mailchimp, Active Campaign, AWeber, and many more. Thus, you as a user can easily upload an email list from any of these 45+ apps and manage your marketing activity from a single platform.

  • Gender & Geo Location Detection

    When we uploaded an email list file of CSV format consisting of the first name column, the ZeroBouce system detected the gender & geo-location easily from that information. This is where ZeroBounce stays ahead of other email verifiers.

  • Quick Turnaround Time

    While auditing ZeroBounce, it took 450 minutes to verify 10K emails. On the other hand, the average industry standard T/A time is 498 minutes for 10K email verification. Thus, we can see that ZeroBounce’s actual T/A time is less t


  • Less Affordable

    ZeroBounce asks for $65 for 10K email addresses, which is very high compared to other vendors such as RemoveBounce, DeBounce, etc. Moreover, its minimum purchase size is 2000 credits at $16. With this, ZeroBounce gets 22nd rank for its pricing/affordability among 35+ other vendors audited by LCA.

ZeroBounce - 20th Most affordable ServiceWhile listing the email verifier services as the least costing placed on top, ZeroBounce stands on the seventh spot.

Number of Email Verifications Cost/Price
5000 Email Verifications $39
10000 Email Verifications $65
100K Email Verifications $390
500K Email Verifications $1500
1M Email Verifications $2250
  • Cost of verifying 2k to 100k emails is low as it costs $0.0039 per email for 100K emails.
  • The minimum order value is $16 for 2000 credits. The credit never expires.

Top 10 Most Affordable Email Verification VendorsHere we’ve arranged the top 10 Email Verification Vendors on the basis of how much they charge for verifying 10K emails.

(Cost for 10k Email verification)

See All Affordable Email Verification Vendors

ZeroBounce - Ranked 4th Regarding Accuracy Percentage

  • We’ve audited their verification accuracy by checking 200 email addresses of mixed types (valid, invalid, greylisted, role-based, disposable, etc.). Out of them, 95% of emails are accurately verified by ZeroBounce. It is the (4th) best accuracy we’ve measured. Below is a more detailed analysis of our findings in the table.
Vendor’s self-quotation
Accuracy calculated in our Audit

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ZeroBounce - Accuracy Percentage Detected in Different Email Validations

From our in-depth survey, we've calculated ZeroBounce's accuracy as 96% . You can get profound details in the table below:

Top 10 Overall Most Accurate Email Verification Vendors

Let’s know how does ZeroBounce Accuracy surpasses the Industry standards.

ZeroBounce Accuracy Industry Average
Gmail 100 0
Hotmail 100 0

ZeroBounce - Ranked 1st Fastest in Turnaround time Turnaround time is the time taken by any Email verification service to validate a given number of emails. Lesser the turnaround Time, faster the service is considered

  • ZeroBounce gives a quick analysis, which shows the overall health of the uploaded file within 6 to 7 minutes.
  • ZeroBounce consumes 43 minutes to deliver the resultant file of 10k email addresses. Time taken is on the higher side as it uses the Greylisting feature.

Average Industry Standards

ZeroBounce's Turnaround Time

Top 10 Vendors with Fastest Email Verification

(Turnaround Time per 10k Emails)

Integration Options

  • ZeroBounce offers 45+ integrations
  • ZeroBounce integrates with leading ESPs like MailChimp and Constant Contact.

Advance Features

  • Higher Level of Security: ZeroBounce provides military-grade security for its users’ data.
  • Catch-all Email Detection & A.I. Scoring System: This email verifier is accurate at detecting the catch-all email addresses, and it has the A.I. scoring system based on which in-depth validation is possible to find the best contacts.
  • Enhanced Resultant Data: It can automatically detect the names, gender, and location based on the email addresses we provide.
  • Deduplication at No Cost: ZeroBounce also facilitates its users to deduplicate the email list without using any credit. Apart from that, it can also detect 29 types of risky email addresses to maintain the hygiene of your email list.
  • No Charge for Unknown Emails: This tool doesn’t charge anything for email addresses that the platform itself can’t identify. As a result, these kinds of emails are generally returned as “unknown.”

Major Clients

client1 client2 client3 client4 client5 client6 client7 client8 client9 client10 client11 client12 client13 client14 client15 client16 client17

Sign up process

  • To sign-up on ZeroBounce, email verification is mandatory for completing the sign-up process.

App installation required?

  • ZeroBounce is a SaaS-based platform, which does not require any download or installation.

Formats for file Upload

  • You can upload your email list in .csv, .xls, .xlsx, and .txt formats.
  • If you upload a .csv file with a first name column, their system will use that information to find the gender of that email.
  • Email lists containing more than 20% mal-formed or blank emails will not be accepted.

Formats for file Download

  • The zip file will have files in CSV format viz. all results, abuse, catchall, do not mail, invalid and the original file.
  • The results will be broken down into separate files based on the status of the email: Valid, Invalid, Catch-All, SpamTrap, Abuse, Do Not Mail, and Unknown. The original file you uploaded will be included in the results as well.

Customized / scalable services

  • ZeroBounce offers customized/scalable services.
  • All you need to do is, contact their support team and explain your requirement.
Request a quote

Customer Support

  • Apart from the prominent services, their support is commendable.
  • ZeroBounce provides quick support via email, answers are detailed and informative. It takes 1 to 3 hours to respond to the email ticket.
  • They provide 24/7 support via Live Chat.
  • ZeroBounce replies on live chat instantly.
  • ZeroBounce answers the user's technical queries with great explanations and details.
  • They also provide support via phone during business hours, i.e. Mon-Fri (5 am-7 pm). EST
Claimed By ZeroBounce
Live Chat
Live Chat
  • Excellent
  • Good
  • Average
  • Not available

Real-time verification through API

  • ZeroBounce provides API support for avoiding incorrect email addresses from signing up on your mailing list.
  • API supports different languages like PHP, Python, JQUERY, .NET, Java
What Email Verification solution do you use?
I Use This
I Use This
I Use This
How likely is it that you would recommend Verify to a friend or colleague?

ZeroBounce Reviews


Irene Iris said "amazing service, I would use it everytime I need to validate emails."


Robil Hossain said "Compare various Email Verification service providers and select the best one for your requirement"

Does not Recommend

James P. said "We're using Zerobounce since last 3 months. Best part of their service is their accuracy and speed. We're almost receiving 98%+ accuracy with every validation we do with Zerobounce."


Makailol Charls said "Accuracy of Zerobounce is not as good as it is mentioned on their website."

Does not Recommend

Freya De Vries said "The best!! 24/7 support, fast and accurate, the perfect email validation service!"


Vlad Stoian said "Great service, very accurate and reasonably priced, very good service and I recommend it highly for their standards in quality and care given to the customers."


Adrian Littera said "Best e-mail verification service available. Very pleased."


George Nmn said "best email validator, greast customer service , cheap prices"


Straton Dan-Andrei said "The best email validation software. High accuracy. Professional team. Great services."


Alexandru Ghitan said "Fast, easy to use and accurate results! I definitely recommend ZeroBounce!"


Anca Vasile said "ZeroBounce it is the best email validation service"


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From The Business

About - ZeroBounce

Established in 2017.

ZeroBounce is among the most prominent vendors in terms of accuracy. Setting it apart from competitors, ZeroBounce complements the incredible email verification service through performance analytics and adding missing data to your email address list [such as subscriber's first and last name, gender, city, state, country, and IP registration information at no extra cost].

An equally impressive feature we found during our audit was seamless 24*7 customer support, available to customers around the clock. With its highly secured data cleansing process, ZeroBounce has acquired some pretty big-time clients; namely Siemens, Tripadvisor, Shopify, Comodo, Allstate, etc.

Although ZeroBounce is the premier email validation service, it has fallen behind by not providing ESPs integrations. $35 is the minimum payment amount that ZeroBounce charges for 5000 credits. The credit never expires. But if you were to verify a smaller volume, there are other alternatives you can elect for. Certainly deserving of first place by accuracy, ZeroBounce ranks lower in cost per email verification.

ZeroBounce - Data Protection

ZeroBounce uses “Cloudflare” for surefire content delivery which ensures additional defense against cyber attacks and data breaches. ZB is one of the only email verification services that uses a military-grade encryption algorithm to safeguard YOUR files and YOUR personal information.

ZeroBounce ensures data security by encrypting the files as well as protecting them through a password during the process of email verification. Only the registered user will have access to the files. ZeroBounce will never store any data in their system. After the email verification is completed, all the data and related aspects will be erased in maximum of 30 days.

ZeroBounce - Privacy Policy

ZeroBounce complies with the EU-U.S. Privacy Shield Framework and the Swiss-U.S. Privacy Shield Framework as set forth by the U.S. Department of Commerce regarding the collection, use, and retention of personal information transferred from the European Union and Switzerland to the United States, respectively.

ZeroBounce - Hosting locations

ZeroBounce hosts its Email verification servers in the European Union.

Anti - greylisting technology

ZeroBounce allows for a comprehensive, 37 minutes verification process for the email list because it deploys the anti-grey-listing technology. A lot of remote mail servers will issue a 421 response code initially, then after a period of time up to 30 minutes, they will allow the email address to be validated appropriately.

If any file has an email address that encounters a single 421 response, it will delay the entire file processing time by up to 35-37 minutes.

Liviu Tanase

Liviu Tanase

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