ZeroBounce vs. MailTester.com

MailTester.com is a relatively popular name in the email verification space. But does it offer superior pricing and features compared to ZeroBounce’s email cleaner?

Using a reliable email validationA process that determines if an email address uses valid syntax, exists on a given domain, and is configured to receive incoming email messages service is just as important as the cost when it comes to improving email deliverability. That’s why we did the company research for you so that you can choose the best email list cleaning service for your email lists.

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Compare MailTester.com and ZeroBounce

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Email Bounce Detection
Spam Trap DetectionDescribes an email validator’s ability to detect a spam trap successfully.
Free deduplication
Data security: Unique key for each file uploaded in the system; military grade encryption algorithm to safeguard all files and personal information.
Disabled email detection: Identify Yahoo and AOL-disabled email accounts.
Email Abuse Detection
Email Data Append
Toxic Domain Detection
Social Append
IP Information Append
Disposable Email Detection
Catch-All Domain DetectionAn email validation feature that enables the validator to identify and report known catch-all email addresses used by a company or email domain.
Email Gender Append
24/7 Support
Accuracy Rate
Money-Back Guarantee
iOS app
Email FinderA tool that allows users to look up an email address by using either a name, an email domain, or a combination of both data points.
Activity Data - "Identify Openers, Clickers, Forwarders and Unsubscribers on your list"

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no expiration for PAYG credits only

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Comparison as of January 2024

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.

The No. 1 email validationA process that determines if an email address uses valid syntax, exists on a given domain, and is configured to receive incoming email messages service for 350,000+ clients

Read the ZeroBounce vs. MailTester.com G2 comparison report

G2 comparison report for ZeroBounce vs. MailTester showing ZeroBounce with 322 reviews and an average rating of 93 and MailTester with 10 reviews and an average rating of 73. ZeroBounce leads in all areas.
ZeroBounce has become a G2 Email Verification Software Fall Best EST. ROI Small Business for 2024.
ZeroBounce has become a High Performer for G2 for the Fall of 2024.
ZeroBounce has become a Mid-Market High Performer for G2 for the Fall of 2024 as the email verifier.
ZeroBounce has become a Small Business High Performer for G2 for the Fall of 2024 as the email verifier.
ZeroBounce has become a Small Business Best Relationship for G2 for the Fall of 2024 as the email verifier.
ZeroBounce has become an Enterprise High Performer for G2 for the Fall of 2024.
ZeroBounce is a Leader in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business Leader in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Momentun Leader in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Mid-Market Best Est. ROI in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Mid-Market High Performer in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business High Performer in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Momentum Leader in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a High Performer in Asia in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a High Performer in Asia Pacific in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a High Performer in Europe in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a High Performer in India in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Mid-Market High Performer in EMEA in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business High Performer in Latin America in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Leader in EMEA in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business Leader in Asia in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business Leader in Asia Pacific in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business Leader in EMEA in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business Leader in Europe in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business Leader in India in the Email Verification category with G2 for the Fall of 2024.
ZeroBounceis a High Performer in EMEA in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Mid-Market High Performer in Asia Pacific in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business High Performer in Asia in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business High Performer in Asia Pacific in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business High Performer in EMEA in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business High Performer in Europe in the Email Verification category with G2 for the Fall of 2024.
ZeroBounce is a Small Business High Performer in India in the Email Verification category with G2 for the Fall of 2024.
Hands holding a tablet with reports and graphs that show email validation results and a list of company names and email domains

How accurate is MailTester.com?

MailTester.com’s front page advertises its ability to clean emails with 99% accuracy. This high level of accuracy makes it potentially one of the stronger email verifiers available on the market.

However, it’s crucial to note that MailTester.com does not guarantee these claims.

ZeroBounce also offers 99% email validation and verification when you clean your email lists. The difference is they offer a no-questions-asked, money-back guarantee to all customers.

They guarantee you’ll get an accurate, clean list, improve your email deliverability and get your email bounce rateThe percentage of emails that are undelivered vs. delivered to the intended recipient. to a safe range below 2%

ZeroBounce allows you to clean your entire list without risking poor results. If they don’t live up to the promise, you can take your budget and find an email cleaner that can do better with ease.

What types of emails can MailTester.com detect?

Since our last comparison, MailTester.com has improved the number of email types it can detect when you use its email verifier.

Their email list cleaning reports currently break your emails down into the following categories

Types of Emails MailTester Identifies

Checkmark

Deliverable

X sign

Invalid

Watch timer

Disposable

Email letter with a slash through

Accept all

Spam email symbol

Spam
traps

circled question mark

Unknown

Their site also makes mention of an ability to detect “known complainers,” but it does not list how it does this or how it appears in your report in their documentation.

MailTester.com’s email verifier offers other benefits, such as removing duplicate emails, anti-greylisting to bypass spam prevention, and domain issue detection.

ZeroBounce offers superior, comprehensive email detection

ZeroBounce can generate more than 30 status types for the email addresses on your list. Most other email verifiers struggle to get close to its precision and accuracy.

Types of Emails ZeroBounce Identifies

Checkmark

Deliverable

X sign

Invalid

Two emails stacked together

Alternate
emails

Two person icons

Alias

Person icon

Role
based

Toxic symbol

Toxic
domains

Mechanical trap

Possible
traps

Globe icon

Global
suppression

In your list cleaning report, you’ll see the validation status (valid, invalid, or unknown) and a descriptive sub-status that gives you more significant insights into your email list. You can easily browse the complete in their user-friendly documentation.

ZeroBounce will also highlight any outstanding issues during email validation, including problems with email domains, SMTP configuration, or mx exchange. They also use anti-greylisting technology to bypass common spam prevention tactics, leaving you with more data and fewer unknown results.

They’ll also remove duplicate emails from your list and automatically correct typos or syntax errors. You’ll never spend a credit unless they can get you a result.

Verify+ from ZeroBounce logo

Last, but not least, ZeroBounce is the only email validation service that has a solution for identifying Yahoo and AOL-disabled emails.

And, it’s free. When you upload your email list for validation, ZeroBounce scans the list for Yahoo and AOL email addresses. If it contains a notable volume of these accounts, you’ll get the option to opt into Verify+ from ZeroBounce. This additional service sees ZeroBounce sending a message to those accounts to check for bounces.

There’s no risk to your company or reputation, and ZeroBounce handles the verification for you.

A woman looking at the camera, a list of 5 catch-all emails scored 3-10, and a circle graph showing 32% catch-all emails

MailTester.com can’t score your catch-all emailsAn email set up by a business to capture email messages sent to their name via an invalid address (e.g., j0hn@company.com instead of john@company.com). Catch-all inboxes receive a high volume of spam and may not be actively monitored by the owner.

There’s a chance a catch-all (accept-all) result will pop up on your email list eventually. Most email verifiers, like MailTester.com, will detect them, but that’s it. What do you do with a catch-all - is it valid or undeliverable?

Catch-alls can be somewhere in between. Some companies use them to ensure incoming emails get delivered even if the recipient address is invalid. But, they often become spam havens, go dormant, and offer low engagement.

ZeroBounce provides Email ScoringA ZeroBounce service that uses AI and proprietary technology to grade an email contact based on their likelihood to interact with an email and convert (most commonly used for catch-all email addresses). that lets you know the engagement level of any catch-all email on your list. That address might become a valuable email campaign lead if it scores high. If it scores low, it’s safe to kick that bad data to the curb.

MailTester.com can’t provide any similar service to give you the deep insights you need to improve your email marketing results.

MailTester.com can’t provide additional email data

Outside of detecting certain email statuses and technical issues, you get what you pay for with MailTester.com.

On the other hand, ZeroBounce delivers a wide range of appended data to your email list cleaning report when available. You’ll not only know the status of the email, but also the domain, IP, mx information, and other technical details.

You can also learn social data crucial for segmenting and retargeting your emails. ZeroBounce aims to find the email owner’s name, gender, and location to help you learn more about your subscribers.

Finally, ZeroBounce provides Activity Data in your email verification report. This AI-driven service lets you know whether or not your valid contacts are active based on their past opens, clicks, forwards, and unsubscribes. You can track activity from one month to one full year.

two men and two women with different email scores ranging 4-9 with a box that reads “Rating 8/10”

MailTester.com can provide some clean emails. ZeroBounce aims to overhaul your email deliverability and improve your email marketing results.

ZeroBounce is the only mobile email verifier

Recently launched, ZeroBounce is now the only reputable email verification service with a fully-responsive mobile experience.

iPhone screen listing different ZeroBounce integrations, including Shopify, Mailchimp, Constant Contact, AWeber, and Drip

You can not only clean emails from your desktop device, but you can now upload your email list with your iPhone on the go. Clean emails, score them, track Activity Data, manage your API, set up integrations, and more.

MailTester.com can’t provide the convenience and accessibility of ZeroBounce’s mobile experience.

Customer support agent wearing a headset looking at his computer

At ZeroBounce, customer service is everything

As easy as email verification can be, it’s good to know someone’s on your side if you have a technical issue.

MailTester.com provides support by phone 9 AM - 6 PM EST - weekdays only. These limited hours only cater to a specific audience of clients worldwide.

ZeroBounce provides truly global email validation. No matter where you are, you can access customer support by phone or live chat within seconds. Their support is available 24/7 - weekdays, weekends, and holidays.

You can access their complete and comprehensive help documentation from their website anytime.

Create a free account today

Accurate, fast, and secure email validation

Try it free

Sign up for 100 free monthly email verifications

Several graphics including spam placement test results, a blacklist alert, an 8/10 rating, and a graph showing total completed email validations alongside three businesswomen chatting

ZeroBounce offers more than email validation

MailTester.com cleans emails and provides a simple deliverability toolkit, including inbox placement and blacklist detection.

ZeroBounce cleans emails, scores them, fills in technical and social data points, and provides recent Activity Data for your campaigns. They also offer a robust email deliverability toolkitZeroBounce’s package of email deliverability tools and services, which includes the following: Warmup, DMARC Monitor, Email Finder, Blacklist Monitor, inbox placement testing, and email server testing. that helps you avoid bounces, land in the inbox, and convert more customers.

Whether you need to improve your emails at your desk or on the go, ZeroBounce always has the solution.

Man and woman looking at a tablet

No one knows security better than ZeroBounce

Customer data security is ZeroBounce’s top priority. Our developers strive not only to deliver the world’s most accurate and accessible email verification experience but also to ensure that your personal, email, and financial data is secure.

MailTester.com makes no mention of any security features on its platform.

ZeroBounce is SOC 2 Type 2 and ISO 27001 certified. They also comply with GDPR, PCI, and CCPA to ensure your data is secure. They also work closely with cybersecurity experts to help with penetration testing and risk management assessment.

  • ZeroBounce is SOC 2 Type II Compliant

    SOC 2
    Type II
    Compliant

  • ZeroBounce is now ISO 27001 Certified

    ISO 27001 Certified

  • ZeroBounce is now HIPAA Compliant

    HIPAA Compliant

  • ZeroBounce is GDPR Compliant

    GDPR Compliant

  • ZeroBounce uses Privacy Sheild Framework

    Data Privacy Framework (DPF)

  • ZeroBounce is CCPA Compliant

    CCPA Compliant

Frequently asked questions

ZeroBounce offers more accurate, comprehensive email verification by identifying more than 30 email types. It also provides a complete email deliverability toolkit, including inbox placement and email server testing, blacklist monitoring, and email finding services. It also offers 24/7 customer support, 365 days a year.

MailTester.com categorizes your email verification results as the following:

• Deliverable
• Invalid
• Disposable
• Accept-all
• Spam traps
• Unknown

MailTester.com does not mention or advertise a money-back guarantee. By comparison, ZeroBounce guarantees 99% email verification accuracy.

An email verifier identifies your database's valid, invalid, and high-risk emails. You’ll improve your email bounce rate and overall email marketing engagement by eliminating the latter.