8 Best Email Verification Tools For 2024 (Comparison)

Looking for the best email verification tools? You’re in the right place.

If you’re regularly sending out marketing emails, it’s super important to keep your list clean. And the best way to do that is to use an email verification tool.

These tools check email addresses to make sure they’re valid and authentic, which helps reduce bounce rates and protect your sender reputation.

In this post, we’ll be reviewing and comparing the best email verification tools on the market this year.

The best email verification tools – comparison

#1 – ZeroBounce

ZeroBounce is my top pick. It’s the most reliable of any email verification tool I’ve tested, and correctly identifies email addresses as valid or invalid almost 100% of the time.

One of the things I like most about ZeroBounce is how easy it is to use.

All you have to do is sign up and upload the list of emails you want to verify. ZeroBounce will go through it and remove all invalid addresses, spam traps, etc. in bulk. Then, you just download the clean list and you’re done. It’s as simple as that.

After you’ve cleaned your existing list, you can keep it clean using the real-time email list validation API. 

Just connect it to your website builder/CMS/email marketing tool, and it’ll automatically check the email addresses of any new leads that opt to join your list in real-time. And if the contact enters a bad email address, ZeroBounce will block it.

Aside from verification, ZeroBounce also offers other tools to help reduce bounce rate and protect your sender reputation, including a bunch of useful email testing tools, email scoring and analytics, round-the-clock monitoring, and more.

ZeroBounce offers both pay-as-you-go and monthly pricing options. Pay-as-you-go is a good option if you don’t want to get locked into a plan, but you’ll save a little money if you subscribe.

Key features

• On-demand email verification. Enter email addresses individually or upload them in bulk to instantly verify them using ZeroBounce’s reliable verification technology.
• Real-time email verification. Connect ZeroBounce to your other tools via native integrations or the API to start checking email addresses in real time as you collect contacts.
• Activity data. Gather insights into how the contacts in your list are engaging with your emails, add them to your reports, and use them to segment your campaigns.
• Email scoring. Use AI-powered email scoring to analyze the behavior of each email address on your list and score them from 1-10 based on how likely you are to reach a real person.
• Email tests. Test your content, inbox placement, and server configuration before launching your campaign to reduce the bounce rate.
• Inbox placement testing. Test your subject lines & content to see if your emails are being flagged as spam.
• Email finder. Use ZeroBounce’s email finder to identify and validate business contacts with nothing more than a domain and a contact name. 
• Blacklist monitoring. Monitor over 200 blacklist service providers around the clock to protect your IP reputation.

Pros and cons

Pricing

Free plan available. Paid plans start from $18/month. 

#2 – Mailfloss

Mailfloss is one of the best email verification tools for content creators and entrepreneurs. I’ve personally used it to clean up Blogging Wizard’s list, and it found a bunch of email addresses that were dragging my deliverability down—some of which other tools missed.

What I like most about Mailfloss is how easy it is to set up. The whole process literally takes about a minute.

You don’t have to mess around with complex APIs; you just use one of the native integrations to connect it to whatever email service provider you use (i.e. Mailchimp, AWeber, Constant Contact, etc.).

Then, push a few buttons to change your settings (or leave them as they are), and you’re up and running.

Mailfloss will start scanning your list for invalid email addresses every day and will remove them before they become a problem.

And what’s really cool is it’ll also look for common misspellings and fix them automatically. So for example, if one of your contacts has misspelled ‘@gmail.com’ as ‘@gmaik.com’, it’ll correct that typo so you don’t miss out on the lead. Cool, huh?

Key features

• Automatic daily cleanup. Automatically identify and remove invalid addresses with Mailfloss’s daily list cleanup.
• Real-time verification. Check email addresses as they come in and block invalid entries, spam traps, etc.
• 35+ supported integrations. Mailfloss connects to AWeber, Mailchimp, Campaign Monitor, MailerLite, Moosend, and loads of other email service providers.
• Automatic contact tagging. Aside from deleting and unsubscribing invalid addresses, Mailfloss can also tag them (so you can add them to unsubscribe/re-engage workflows, for example).
• Typo fix. Mailfloss checks for common misspellings of popular email services and fixes them automatically.
• Real-time API. If you want to connect Mailfloss to your custom apps, you can use the developer-friendly API.

Pros and cons

Pricing

Plans start from $25/month. Get started with a 7-day free trial.

#3 – MailerCheck

MailerCheck has the best user interface of any email verification software I’ve tried, and a lot of useful features to boot.

There are three ways to verify emails with Mailercheck: You can validate a single email address by entering it manually, you can upload your entire list for bulk checking, or you can validate emails in real time as they come in through the API.

On top of that, MailerCheck also has a few other useful features to help you boost your deliverability and the success of your email marketing campaigns.

The Insight score feature is particularly useful. It scores your email content before you hit send based on how likely it is to reach the inbox, factoring in things like spam words, broken links, etc. And if there’s a problem, it’ll tell you how to fix it.

You can also use the Inbox Placement tool to send out a test email to all the major mailbox providers (Gmail, AOL, Outlook, etc.) and make sure your emails aren’t going straight to the spam folder. 

If you just want to verify email addresses, it’s best to sign up for MailerCheck’s free plan and then purchase the credits you need. But if you want to access their DMARC reporting and blocklist monitoring tools, you’ll need to sign up for a subscription plan, which can be a little pricey.

Key features

• Email verification. Verify emails individually, in bulk, or in real time.
• Insights. Check your email content and get insights to help you maximize deliverability and open rate.
• Inbox placement. Send out test emails to check if your emails reach the inbox or get routed to spam.
• Reports. Compile useful analytics data into reports to help you optimize your campaigns and list-building methods.
• Monitoring. DMARC and blocklist monitoring keep track of your domain activity and IP to help maintain reputation and deliverability.

Pros and cons

Pricing

Free plan available. Pay-as-you-go starts from $0.01 per credit or $10 for 1,000 credits. Paid plans start from $125/month. Get your first 200 credits for free.

#4 – Clearout

Clearout is another one of the most trusted tools for verifying email addresses. It’s a particularly good choice for sales teams as it also comes with some useful prospecting tools.

Clearout claims that its verification tool is 98% accurate, and that seems to check out based on my tests. 

You can validate addresses individually or in bulk. Plus, roll out real-time verification through the REST API. 

I like Clearout doesn’t just remove dodgy email addresses, but also gives you contextual information as to why. 

For example, if an address is invalid, it might tell you that’s because the recipient’s mailbox wasn’t found, or because the domain is part of a blocklist. 

It also categorizes questionable email addresses as either unsafe to send, risky, or unknown, so you can make the call. And it provides detailed stats about your list’s accuracy, spam traps, bounces, disposable emails, etc.

Clearout’s email finder is pretty good too. It can discover contact email addresses for any domain individually or in bulk, with confidence scoring to let you know how likely it is to get you in touch with the person you’re looking to speak to.

Key features

• Email verifier. Check email addresses individually, in bulk, or via the API with superb accuracy.
• Phone verifier. Use ClearoutPhone to check the validity of phone numbers across 240+ countries.
• Email Finder. Enter any domain and the name of the person you want to contact to find their email address
• Bulk Email Finder. Discover a large volume of contacts for your cold email marketing efforts with a single search
• Sales prospecting. AI-powered prospecting tools to help you find leads and build contact lists.

Pros and cons

Pricing

Paid plans start from $31.50/month, get 20% off when you pay annually. Pay-as-you-go pricing is also available. Get started with a free account.

#5 – EmailListVerify

EmailListVerify is one of the most cost-effective tools on this list. Its pay-as-you-go plans are fantastic value for money. 

With most email verification tools, the entry rate is around 1 cent ($0.01) per email. It gets cheaper the more emails you send, but that’s where it usually starts.

However, with Email List Verify, you pay less than half that ($0.004 per email) as the starting rate—that’s a huge saving.

And despite the difference in price, the tool itself works the same way as most other verification tools. 

It checks your emails against various risk factors and signals to identify spam traps, hard bounces, catch-all emails, disposable emails, duplicates, and all the other stuff you don’t want clogging up your list. Then, it removes them.

You can upload your entire list in various formats for bulk verification, and then download the clean version, or just verify single addresses one by one. Alternatively, you can also use the real-time API to catch emails before they get to your list.

Key features

• Email verification tool. Clean your list by verifying email addresses individually or in bulk.
• Email verification API. Use the API to verify email addresses in real-time when contacts enter them on your website, newsletter sign-up forms, or wherever else you collect leads.
• Stats. View all the important analytics data like total valid email addresses, spam traps, accept-alls, disposable addresses, invalid addresses, etc. from the Stats dashboard.
• Integrations. Verify your email lists in whatever tool you use to send emails with native integrations for Mailchimp, AWeber, MailerLite, and lots more.

Pros and cons

Pricing

Pay-as-you-go plans start from $0.004 per email. Monthly plans start from $139/month. Get started with 100 free verifications.

#6 – Emailable

Emailable is a good option for businesses with large email lists thanks to its lightning-fast verification process.

With Emailable, you can verify up to 30,000 emails per minute—that’s 8x faster than some of its competitors. So if you have hundreds of thousands of addresses to check, you won’t be waiting hours to get through them all like you would with other tools.

Its checks are super comprehensive too. It looks for all the usual red flags and does a good job of removing all the bad emails you don’t want. 

In fact, they’re so confident in the quality of their verification process that they offer a 99% delivery guarantee. In other words, they guarantee that no more than 1% of the emails you send to lists cleaned with Emailable will bounce.

Another feature I like is Emailable’s automated list cleaning. It can automatically run verification checks at your chosen intervals from inside your email provider’s database, so you don’t need to remember to do it manually. This helps you keep on top of your list hygiene.

Key features

• GDPR-compliant email verification. Validate up to 30,000 emails a minute with Emailable’s GDPR-compliant verification tool.
• Automated list cleaning. Emailable automates the list cleaning process—just connect it to your email provider, choose how often you want to verify emails and set your custom parameters.
• Real-time verification widget. Add real-time validation to any HTML form by copy-pasting a snippet of code (it’s super easy).
• Developer-friendly API. Emailable’s API was built with developers in mind, with straightforward documentation and fast & simple setup.
• Other tools. You also get other features to help improve deliverability including inbox placement tests, comprehensive metrics/insights, blacklist monitoring, and more

Pros and cons

Pricing

Plans start at $38/month with pay-as-you-go, save 15% when you subscribe. Get started with 250 free credits.

#7 – Hunter

Hunter is a great option for anyone running outreach campaigns. It gives you everything you need to find leads, verify their email addresses, and reach out in one place.

Hunter’s email verifier is just one part of its larger outreach toolkit, but it works great and the checks it runs are super thorough. 

It validates the email format, the domain information, and the email server response. Plus, it also compares emails against Hunter’s database of professional email addresses to make sure everything checks out.

There’s a bulk verification tool and an API for real-time verification. Plus, an add-on for Google Sheets.

Most email verification tools can do all of the above, but what makes Hunter special is its email finder. It’s probably the best tool on the market when it comes to discovering professional email addresses to target in outreach campaigns.

Key features

• Email verification. Validate emails individually, in bulk, or through Hunter’s API.
• Hunter Campaigns. Use Hunter’s Campaigns tool to create and send out personalized cold emails at scale and track the results.
• Domain search & email finder. Grab the email addresses of professional contacts from any company name or website so you can get in touch.

Pros and cons

Pricing

Free plan available. Paid plans start from $49/month, get 30% off when you pay yearly.

#8 – NeverBounce

NeverBounce is another solid email verification service to round out this list. It’s not as fast as some of its competitors, but its checks are very thorough. And I like its automated list-cleaning tool.

NeverBounce claims to be able to process up to 10,000 emails in around 2-10 minutes. That’s not nearly as fast as something like Emailable (the fastest tool on this list), but what it lacks in turnaround time it makes up for in accuracy.

There are a few ways to verify emails with NeverBounce. You can clean entire lists in bulk, verify emails at the point of entry, or use the set-it-and-forget-it verification tool to automatically clean your lists around the clock. 

It integrates with 80+ tools including all the leading email providers, and its plans are pretty good value for money. 

Key features

• Clean. Upload your dirty email list to verify emails in bulk, then download the clean list minutes later.
• Verify. Add NeverBunce Verify to your opt-in forms and lead-capture pages to validate user emails at the point of entry.
• Stats. View validation results to see how many valid, invalid, accept all, disposable, and unknown addresses were in your list.
• Instant bounce analysis. Test your list to see whether it needs to be cleaned or you’re good to go.
• Sync. Connect NeverBounce to your email provider to clean your lists automatically around the clock without you ever having to lift a finger.

Pros and cons

Pricing

Pay-as-you-go rates start at $0.008 per email, and you can save money with volume discounts. Monthly plans start at $10/month, and you can get 20% off when you pay yearly. Get started with free credits.

Final thoughts

That concludes our roundup of the best email verification services.

All of the tools in this list do a great job of verifying email addresses, so you can’t go wrong with any of them. But the best choice for you will depend on factors like the features and integrations you need, your budget, etc.

By the way, verifying email addresses isn’t the only way to make your email marketing campaigns more successful. Check out our roundup of 16 ways to increase email open rates for more ideas worth trying.

For other tools that can help with your email marketing efforts, check out our reviews of the best email marketing services and newsletter software.

You might also enjoy our beginner’s guide to email marketing automation and our roundup of the latest email marketing statistics.

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