2) APILayer Email Verification API

The APILayer Email Verification API is designed to validate and verify email addresses by assessing their deliverability and quality. It ensures that email addresses are valid and reachable, helping to maintain high deliverability rates and avoid issues related to fake or mistyped email addresses.
API Features
- Real-time SMTP Server Connection: The API connects to the recipient's SMTP server in real-time to verify if the email address exists without sending an email.
- Disposable Email Detection: Identifies if the email address is from a disposable email provider, such as mailinator.com, which is often used for temporary or throwaway email addresses.
- Catch-All Address Detection: Determines if the email address is a catch-all address, which is designed to receive all emails sent to non-existing addresses within a domain.
APILayer Email Verification API Pricing
- Free Plan: Users can make up to 100 API requests per month. The plan is free forever and does not require a credit card.
- Starter Plan: Users can make up to 5,000 API requests per month. This plan includes standard support services.
- Pro Plan: Users can make up to 50,000 API requests per month. This plan also includes standard support services.
- Enterprise Plan: Users can make up to 250,000 API requests per month. Standard support services are included.
- Custom Plan: Users can customize the number of API requests they need. Contact support for pricing and further details.
3) Cloudmersive Full Email Address Validation and Verification

Cloudmersive Full Email Address Validation and Verification offers real-time, on-demand email verification with high performance, making it suitable for user experience applications such as signup and checkout flows. It supports multi-factor validation, including syntax, DNS, and server-level email verification.
API Features
- Real-time Email Verification: Provides instant, on-demand, real-time email verification suitable for user experience applications such as signup and checkout flows.
- 360-degree Email Verification: Multi-factor validation including syntax, DNS, and server-level email verification ensures high-quality results by verifying the existence of the email address with the email server without sending any emails to the customer.
- Flexible Deployment Options: Cloudmersive APIs can be used from the cloud or deployed to the edge, a private cloud, on-premise data center, or a custom public cloud instance, supporting various deployment scenarios for latency, compliance, security, and control.
Cloudmersive Full Email Address Validation and Verification Pricing
- Small Business Plans: Designed for small businesses with fewer than 50 employees. Basic security features and multi-tenant cloud environment.
- Medium Business Plans: Suitable for medium-sized businesses with up to 250 employees. Options for both multi-tenant and single-tenant cloud environments, on-premises deployment, and advanced security features.
- Enterprise Plans: Tailored for large enterprises with an unlimited number of employees. Flexible deployment options including multi-tenant and single-tenant cloud, as well as on-premises, with advanced security features and SLA agreements.
- Government Plans: Designed for government entities with an unlimited number of employees. Deployment in a government cloud environment, on-premises deployment options, advanced security features, and enhanced support services.
- Cloudmersive Full Email Address Validation and Verification's pricing is not public. Contact their support for more info.
4) Maileroo

Maileroo offers a Free Email Verification API that validates and verifies email addresses in real-time, ensuring the integrity of your platform by detecting temporary, disposable, role-based, and free email addresses.
API Features
- Real-time MX Check: The API verifies email addresses in real-time by checking the DNS records of the email's domain to ensure they exist and can receive emails.
- Temporary Email Detection: Identifies and flags temporary and disposable email addresses to maintain a clean platform and prevent abuse.
- Role Email Check: Recognizes role-based email addresses, such as admin@ or support@, which are often used for generic purposes rather than individual communication.
Maileroo Pricing
- Free Plan: Send up to 3,000 emails per month and manage up to 100 contacts per month.
- Email API Plans: Each tier allows for a higher number of emails to be sent per month, starting from 3,000 emails to over 1,000,000 emails.
- Email Marketing Plans: Each tier allows for managing a higher number of contacts, starting from 100 contacts to over 1,000,000 contacts.
- Custom Plans: For more than 1,000,000 emails or contacts, users need to contact support for pricing.
- Maileroo's pricing is not public. Contact their support for more info.
5) Accurate Append Email Validation and Verification API

The Accurate Append Email Validation and Verification API helps businesses maintain a high-quality email database and ensure effective email communication by checking if an email address is valid and confirming its existence and deliverability. This API is designed to prevent bounce-backs, reduce email marketing costs, and enhance the sender's reputation.
API Features
- Real-time validation: Ensures that email addresses are validated instantly, leading to better inboxing and fewer bounces.
- Triple-scrub process: Utilizes a comprehensive three-step process to clean and verify email lists for enhanced accuracy.
- Integration capabilities: Allows seamless integration of email validation and verification services into various platforms like applications, websites, or CRM systems.
Accurate Append Email Validation and Verification API Pricing
- Free Plan: Users can validate up to 500 email addresses per month with basic verification features.
- Starter Plan: Allows for up to 5,000 email validations per month, including advanced verification features.
- Pro Plan: Offers up to 50,000 email validations per month with premium support and additional verification capabilities.
- Enterprise Plan: Provides up to 250,000 email validations per month, including custom integration options and dedicated support.
- Accurate Append Email Validation and Verification API's pricing is not public. Contact their support for more info.
What to Consider When Selecting a MailerCheck Alternative?
- Real-time Verification: Ensures email addresses are validated instantly, reducing bounce rates and improving deliverability.
- Disposable Email Detection: Identifies and flags temporary or disposable email addresses to maintain a clean and high-quality email list.
- Role-based Email Detection: Recognizes role-based email addresses like admin@ or support@, which are often used for generic purposes rather than individual communication.
- Privacy Compliance: Adheres to privacy regulations such as GDPR and CCPA, ensuring that user data is handled securely and ethically.
- Flexible Pricing Plans: Offers various pricing tiers, including free plans and custom options, to accommodate different business needs and budgets.
Which One Should You Go With?
Choosing the right email validation and verification API can significantly enhance your email marketing efforts and ensure the integrity of your email lists. Each of the options discussed offers unique features and pricing plans to cater to different business needs. Whether you prioritize real-time verification, disposable email detection, or privacy compliance, any of these APIs would be a solid choice.
If you're looking for a reliable alternative, we recommend signing up with Abstract API. With its robust features, privacy compliance, and excellent customer support, Abstract API stands out as a comprehensive solution for maintaining a high-quality email database. Sign up today and experience the benefits of seamless email validation and verification.