Free Resource
Free Email Providers Database
A searchable directory of 4,778+ free email provider domains worldwide. Our API checks against all of them in real time.
Showing 0 providers
No providers match your search.
What are free email providers?
Free email providers offer email accounts at no cost to users. Services like Gmail, Outlook.com, and Yahoo Mail dominate the market, but hundreds of regional and privacy-focused alternatives exist worldwide. When a user signs up for your product with a free email address (like user@gmail.com), it typically means they're using a personal account rather than a business email.
Why does this matter for your business?
Lead qualification
B2B companies often prioritise business email signups over free provider addresses. Detecting free email providers helps you segment and score leads more accurately.
Fraud prevention
High-value transactions from free email addresses may warrant additional verification. Knowing the provider helps you apply the right risk rules.
User segmentation
Understanding which email provider your users prefer helps inform marketing strategies, especially for region-specific campaigns.
Deliverability planning
Different providers have different spam filtering rules. Knowing your audience's provider mix helps optimise email deliverability.
Detect free email providers via API
The Mailchk API checks every email address against 4,778+ known free email domains in real time. The free_email field in the response tells you instantly whether an address belongs to a free provider.
curl -X POST https://api.mailchk.io/v1/check \
-H "X-API-Key: your-api-key" \
-H "Content-Type: application/json" \
-d '{"email": "user@gmail.com"}'
// Response includes:
{
"email": "user@gmail.com",
"valid": true,
"free_email": true, // ← detected as free provider
"disposable": false,
"domain": "gmail.com",
...
}Detect free email providers in real time
Start validating emails for free — 200 API calls/month, no credit card required.