2) Verifalia

Verifalia offers an email verification API that ensures email addresses are valid and deliverable, helping businesses maintain clean email lists and improve sender reputation.
API Features
- Real-time email verification: Integrates seamlessly with various platforms to prevent invalid emails at sign-up and safeguard premium content.
- Batch email validation: Allows users to upload and validate email lists on a rolling schedule, ensuring data remains fresh and accurate.
- Secure API: Utilizes HTTPS/SSL connections for secure data transmission, ensuring the protection of sensitive information.
Verifalia Pricing
- Pay-as-You-Go Credit Packs: Ideal for one-time email list cleaning. Credits never expire and can be used anytime.
- Ultimate: Offers 25,000 daily free credits, unlimited additional verifications, and priority support.
- Enterprise: Provides 6,250 daily free credits, unlimited additional verifications, and priority support.
- Professional: Includes 1,250 daily free credits, unlimited additional verifications, and priority support.
- Starter: Comes with 250 daily free credits, unlimited additional verifications, and regular support.
3) WhoisXMLAPI Email Verification API

WhoisXMLAPI Email Verification API performs comprehensive validation of email addresses in real-time, verifying new user registrations, reducing email bouncing, and blocking spam. It checks the syntax, branded status, disposability, mail server existence, mailbox existence, and catch-all status of email addresses to improve email marketing campaigns and ensure valid user sign-ups.
API Features
- Syntax Validation: Ensures the email address conforms to IETF standards using a complete syntactic email validation engine.
- Branded Email Check: Determines if the email address is custom and linked to a business email account or if it is generic from a free email service.
- Disposable Email Check: Identifies if the email address is from a known disposable email provider such as Mailinator, 10MinuteMail, GuerrillaMail, and over 2,000 others.
WhoisXMLAPI Email Verification API Pricing
- Basic: Offers 5,000 email verifications per month with standard support.
- Standard: Provides 20,000 email verifications per month and includes priority support.
- Professional: Includes 50,000 email verifications per month with premium support and additional features.
- Enterprise: Allows for 100,000 email verifications per month, with dedicated account management and custom features.
- Custom: Tailored plans for businesses with specific needs, requiring direct contact with support for pricing details.
4) BytePlant Real Time Email Validation

BytePlant Real Time Email Validation checks the quality of email addresses at the point of entry, automatically detecting if an email address is valid and eliminating disposable, fake, and mistyped addresses.
API Features
- End-to-End Deliverability Check: Ensures that the email address can receive emails by performing a comprehensive validation process.
- Misspelled Domain Detection: Detects common typos in domain names to prevent issues related to typosquatting.
- Greylisting Detection: Detects if the email server uses greylisting, which temporarily rejects emails from unknown senders to prevent spam.
BytePlant Real Time Email Validation Pricing
- Pay-as-You-Go: Purchase credits as needed without a subscription. Ideal for occasional use.
- Monthly Subscription: Offers a set number of email validations per month. Suitable for regular users.
- Enterprise Plan: Customizable plan for large-scale email validation needs. Includes dedicated support.
- Free Trial: Limited number of email validations available for testing the service.
- Custom Plan: Tailored solutions based on specific business requirements. Contact support for details.
5) Hunter Email Verifier API

Hunter Email Verifier API leverages a renowned email verification algorithm to verify and validate email addresses, providing a confidence score and additional metadata for each address checked.
API Features
- Confidence Score and Metadata: Provides a confidence score and additional metadata about the email address, such as its validity, whether it is disposable, and more.
- Fast Response Times and High Uptime: Ensures seamless support for tools with quick response times and nearly 100% uptime.
- Free Access: Available for use without requiring a premium Hunter plan.
Hunter Email Verifier API Pricing
- Free: $0 per month. Includes 25 monthly searches, 50 monthly verifications, and 1 connected email account with regular support.
- Starter: $49 per month (or $34 per month if paid yearly). Offers 500 monthly searches, 1,000 monthly verifications, and 3 connected email accounts with priority support.
- Growth: $149 per month (or $104 per month if paid yearly). Provides 5,000 monthly searches, 10,000 monthly verifications, and 10 connected email accounts with priority support.
- Scale: $299 per month (or $209 per month if paid yearly). Includes 10,000 monthly searches, 10,000 monthly verifications, and 20 connected email accounts with priority support.
- Enterprise: Custom pricing. Features a dedicated account manager, higher rate limit, on-demand quotas, and flexible quotas.
What to Consider When Selecting a Mailboxlayer Alternative?
- Real-time Verification: Ensures email addresses are validated instantly, preventing invalid emails from entering your system and improving data quality.
- Batch Processing: Allows for the validation of large email lists in bulk, which is essential for maintaining clean and up-to-date email databases.
- Integration Capabilities: Seamlessly integrates with various platforms and applications, making it easier to incorporate email validation into existing workflows.
- Data Security and Compliance: Adheres to data protection regulations like GDPR and CCPA, ensuring that user data is handled securely and legally.
- Comprehensive Validation Checks: Includes multiple layers of validation such as syntax check, MX record check, SMTP verification, and disposable email detection to ensure the highest accuracy.
Which One Should You Go With?
Each of the email verification APIs discussed offers robust features and reliable performance, making any of them a solid choice for maintaining clean and accurate email lists. However, if you're looking for an alternative that combines comprehensive validation checks, ease of integration, and exceptional support, we recommend Abstract API.
With its real-time MX & SMTP checks, typo detection, and compliance with major privacy regulations, Abstract API stands out as a versatile and user-friendly option. Sign up today to experience the benefits of a top-tier email verification service that prioritizes both accuracy and user satisfaction.