Simple email validation
for everyone

Remove fake emails and spam users from your email lists. Validate if an address is valid, and if it can receive email, ⏱️ in under 0.5 seconds.

Start for free
user-1
user-2
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+10.572 new users?

OR
This email address looks .
25
50
75
0
100
Valid format
No catch-all
Domain
Deliverable
Generic
Blocklist free

“Mails.so delivers all we need in an email validation service: top security, scalability, performance, and extensive integrations”.

A happy customer, probably

What does this exactly do?

tl;dr — Remove invalid recipients, block fake users and bots, preventing fraud, and 💸 saving thousands of your precious dollars.

Format check
Delivery check
Email profiling
Blocklists
No-code APIs
Mailing lists

Place us after your sign up forms and landing pages.
Save *a ton* of money.

2-3% of users make spelling mistakes
3-4% make up their address on signup
~2% are spam signups with fake addresses
~1% use temporary or catch-all addresses

What can I use this for?

Email marketing

You are

A small business owner or marketer trying to promote your products or services through email.

Mails.so will

Prevent you from sending emails to non-existent addresses, which can damage your reputation and lead to your emails being marketed as spam.

Spam signups

You are

Running a website with a user signup page, or a newsletter subscription form that asks for an email.

Mails.so will

Detect invalid addresses before they register, prevent spam and fake users and keep a high quality user database.

Fraud prevention

You are

An online retailer or service provider who wants to prevent fake accounts from being used at checkout.

Mails.so will

Detect disposable email addresses, catch users trying to use multiple accounts and prevent fraud instantly.

“Mails.so delivers all we need in an email validation service: top security, scalability, performance, and extensive integrations”.

Another happy customer, maybe
For the non nerdsNo code?
No problem.

We've built simple integrations with the most famous no-code tools.

Start building today with🧡 Zapier or 💜 Make.

Start for free
Is it good?Quick, slick, and
tough as a brick.

Try us out in a second, integrate us in a minute, and stick with us forever.

Don't overthink it — we're fast (🚀 ~500ms) and always open (🫀 99.999% uptime).

Start for free
Service status
Operational
mails.so100.00% uptime
API100.00% uptime

I'm sold. How much is it?

tl;dr — if you're validating one email at a time, free forever. If you need to validate whole lists or plan to integrate, it's super cheap.

Free forever

Single validation

If you just want to check a few email addresses from time to time or you're just testing out the service, it is completely free as long as you validate one email at a time.

Start for free
7 days free trial

Lists or API

Then $/mo, flat, for unlimited validations.

For advanced use cases where you need to check multiple emails at once, or you're integrating our validator with your service.

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