Why Trust Check365.io?
Built for Accuracy. Powered by Transparency. Trusted by Marketers.
At Check365.io, we understand that email validation is more than just a technical process; it's the foundation of your marketing success. With a mission to help email marketers, business owners, and marketing teams clean their lists and boost deliverability, Check365 is designed to earn your trust from Day One. Try our fast, secure, and free email validation tool with 99.99% accuracy.
Trusted by Thousands of Marketers and Businesses
Accuracy You Can Rely On
99.99% validation rate, more from others
Honest Pricing
No contracts, no hidden fees
100 Free Credits
Get Started: No credit card required.
Rock-Solid Security
Full data encryption & GDPR-compliant
Affordable
Clear pay-as-you-go and easy pricing option
Built for Teams
API, integrations, dashboards and more
Smart Features
Microsoft sorting, bulk & real-time checks
Trusted & Secure
Used by businesses ranging from startups to enterprises
Check 365 Your Data, Secured & Compliant
End-to-End Encryption
Your data is protected with industry-standard encryption.
GDPR & Privacy-Compliant
We fully comply with data privacy laws to give you peace of mind.
Zero Data Sharing
We never sell or share your lists.
Experience the difference with Check365 and unlock the full potential of your email marketing effort
Start Cleaning Smarter, Not Harder
With Check365, you're not just validating emails — you're building stronger campaigns, protecting your domain, and growing your business with confidence. Try It Free Today!
Start Free ValidationHow Check365 Works? - Fast and Easy
Upload
Import your AOL list via CSV, Excel, or copy-paste.
Validate
Check365 validates each email’s syntax, domain, and mailbox activity in real-time.
Export
Export your polished list and enjoy higher open rates, fewer bounces, and happier campaigns!
Why Email List Cleaning Software Matters
Invalid or spam email addresses increase bounce rates, damage your sender's reputation, and reduce deliverability. An email validation tool like Check365 helps you remove bad emails, avoid spam traps, and comply with privacy laws. This improves campaign performance, saves marketing costs and time, and ensures your messages reach the right inbox. And that's why it's a smart choice for marketers and business owners who are focused on maximizing email deliverability and ROI. With an accurate and fast email verification tool like Check365, your email list stays healthy and effective.
🔗 100% Secure | No Credit Card | No Commitment
Frequently Asked Questions
Have a question? We have the answer. Browse our frequently asked questions to get quick information on our email validation services.
How does Check365's email validation tool work?
Check365 performs real time checks, including syntax validation, domain verification, mailbox existence, and spam trap detection. Plus, we have Microsoft 365 sorting to ensure your emails reach the correct recipients, a unique feature not found in most other tools.
Is my email list data secure with Check365?
Absolutely. Check365 uses end-to-end encryption, complies with GDPR, and never shares or sells your data. Your data is 100% secure with us, we promise.
What types of businesses benefit most from Check365?
Email marketers, business owners, marketing teams, agencies, and developers in industries like e-commerce, SaaS, and finance benefit from our accurate and fast email verification tool.
Why is Check365 better than ZeroBounce, NeverBounce, and other email validation tools?
Check365 stands out because it combines industry-leading 99.99% accuracy and generous free credits (100 free verifications upon sign up), unlike many competitors who offer limited or no free trials. Our unique Microsoft 365 email sorting feature helps you better manage and validate Microsoft-related addresses, a capability not found in most other tools. We offer transparent, as-is pricing with no hidden fees, which is why Check365 is an affordable option for businesses of all sizes.