2) Maileroo

Maileroo is a privacy-friendly email validation service that offers a Free Email Verification API to validate and verify email addresses in real-time. It ensures only real, high-value users are added to your database by checking DNS records and detecting temporary, disposable, role-based, and free email addresses.
API Features
- Real-time MX Check: Verifies email addresses in real-time by checking DNS records to ensure the domain exists and can receive emails.
- Temporary Email Detection: Identifies and flags temporary and disposable email addresses to maintain a clean and high-quality user database.
- Comprehensive Validation Checks: Performs multiple checks including syntax, MX record, disposable email, free email, role email, and spell (domain) checks to ensure email deliverability and safety.
Maileroo Pricing
- Free Plan: Send up to 3,000 emails per month with the Email API or up to 100 contacts per month with Email Marketing.
- 25,000 emails per month: This plan allows sending up to 25,000 emails per month using the Email API.
- 50,000 emails per month: This plan allows sending up to 50,000 emails per month using the Email API.
- 100,000 emails per month: This plan allows sending up to 100,000 emails per month using the Email API.
- 250,000 emails per month: This plan allows sending up to 250,000 emails per month using the Email API.
3) Accurate Append Email Validation and Verification API

Accurate Append Email Validation and Verification API helps businesses maintain a high-quality email database by ensuring email addresses are valid, properly formatted, and deliverable. This API reduces bounce-backs, lowers email marketing costs, and enhances the sender's reputation by confirming the existence and deliverability of email addresses.
API Features
- Real-time Validation and Verification: Ensures email addresses are valid, properly formatted, and deliverable, reducing bounce rates and improving email campaign effectiveness.
- Comprehensive Email Hygiene: Maintains a clean and responsive email list by removing invalid or outdated email addresses, enhancing sender reputation and reducing email marketing costs.
- Custom Solutions: Offers tailored solutions to meet the unique challenges of different companies, ensuring the API can address specific business needs and improve data quality.
Accurate Append Email Validation and Verification API Pricing
- Free Plan: Allows for basic email validation and verification with limited usage.
- Standard Plan: Offers a higher volume of email validations and additional features compared to the Free Plan.
- Premium Plan: Provides extensive email validation capabilities with advanced features and higher usage limits.
- Enterprise Plan: Tailored for large businesses with custom solutions and the highest usage limits.
- Custom Plan: Designed to meet specific business needs with flexible pricing and features.
4) Amazon Email Address & Phone Number Validation API

Amazon Email Address & Phone Number Validation API ensures the accuracy of email addresses and phone numbers worldwide by providing reliable, real-time validation. This API boosts the quality of your contact information and integrates seamlessly with AWS billing, offering a pay-as-you-go plan with no upfront costs.
API Features
- Real-Time Validation: Ensures the accuracy of email addresses and phone numbers by validating them in real-time.
- Bypass AWS Port 25 Blocking: Allows email validation without being affected by AWS's port 25 (SMTP) restrictions.
- Additional Metadata for Phone Numbers: Provides extra information such as area description, phone carrier, and time zone for validated phone numbers.
Amazon Email Address & Phone Number Validation API Pricing
- Pay-As-You-Go Plan: The cost is $0.002 per request sent to the API. No fixed contracts or upfront commitments.
- Monthly AWS Billing: Billing is integrated with the regular AWS invoices, making it seamless for users already on AWS.
- Real-Time Validation: Validates email addresses with SMTP and DNS lookups and checks phone numbers for validity.
- Additional Metadata: Returns extra information such as area description, phone carrier, and time zone for validated phone numbers.
- High Request Capacity: Allows sending up to 100 requests per second.
5) MailerSend

MailerSend is a comprehensive email and SMS service designed to help businesses send transactional emails and SMS, manage their email lists, and ensure high deliverability. It includes tools for email verification, email template creation, user management, and detailed analytics, making it suitable for businesses of all sizes and easy to integrate into existing tech stacks.
API Features
- Transactional SMS: Allows sending of transactional SMS messages to keep customers informed and engaged.
- Dynamic Email Templates: Enables building one-to-one customer relationships on a mass scale using a single email template.
- Inbound Email Routing: Automatically parses incoming emails and integrates them into the user's application for seamless communication.
MailerSend Pricing
- Hobby: Free plan with 3,000 emails per month. Extra usage costs $1.00 per 1,000 emails.
- Starter: $25/month for 50,000 emails, 100 SMS, and 100 email verification credits. Extra usage costs $0.90 per 1,000 emails and $1.40 per 100 SMS.
- Professional: $25/month for 50,000 emails, 100 SMS, and 100 email verification credits. Extra usage costs $0.90 per 1,000 emails and $1.40 per 100 SMS.
- Enterprise: Custom pricing for large organizations with special requirements. Contact support for more details.
What to Consider When Selecting a Cloudmersive Full Email Address Validation and Verification Alternative?
- Real-Time Validation: Ensures email addresses are valid and deliverable by checking them in real-time, reducing bounce rates and improving email campaign effectiveness.
- Comprehensive Validation Checks: Includes multiple checks such as syntax, MX record, disposable email, free email, role email, and spell (domain) checks to ensure email deliverability and safety.
- Scalability: The ability to handle a high volume of requests per second, making it suitable for businesses of all sizes and ensuring the service can grow with your needs.
- Data Privacy and Security: Ensures that data is not stored or shared with third parties and uses industry-standard security practices to protect user data.
- Integration and Ease of Use: Simple integration with existing systems using API keys and comprehensive documentation, making it easy for developers to implement and maintain.
Which One Should You Go With?
Each of the email validation and verification APIs discussed offers unique features and benefits, making them all solid choices for maintaining a high-quality email database. However, if you're looking for a robust alternative, we recommend signing up with Abstract API. Its comprehensive features, global coverage, and scalability make it a standout option.
With Abstract API, you can ensure real-time validation, typo checking, and compliance with privacy regulations, all while benefiting from industry-leading support and documentation. Sign up today to experience the reliability and efficiency that Abstract API brings to email validation and verification.