2) BytePlant Real Time Email Validation

BytePlant Real Time Email Validation is a robust API designed to enhance email deliverability by verifying email addresses at the point of entry. It helps reduce bounce rates, prevent fraud, and eliminate disposable, fake, and mistyped email addresses.
API Features
- Complete End-to-end Email Verification: Ensures the email address is valid and can receive mail.
- Disposable email address detection: Identifies and flags temporary or disposable email addresses.
- Catch-All testing: Determines if the domain has a catch-all policy for email addresses.
BytePlant Real Time Email Validation Pricing
- Basic Plan: Offers a limited number of email validations per month, suitable for small businesses or individual users.
- Standard Plan: Provides a higher quota of email validations, ideal for medium-sized businesses with moderate email verification needs.
- Premium Plan: Includes a large volume of email validations, designed for large enterprises with extensive email verification requirements.
- Enterprise Plan: Customizable plan with tailored features and support, aimed at organizations with specific needs and high-volume email validation.
- Pay-as-you-go: Allows users to pay only for the number of email validations they use, offering flexibility for varying usage patterns.
3) Hunter Email Verifier API

Hunter Email Verifier API is a powerful tool that allows users to verify the validity of an email address through a simple API call, providing a confidence score and additional metadata about the email address.
API Features
- Automated Email Verification: The API leverages Hunter’s renowned email verification algorithm to automatically verify email addresses.
- Detailed API Response: Provides a comprehensive response that includes the validity status of the email, a confidence score, and additional metadata.
- Confidence Score and Metadata: Each email verification comes with a confidence score and detailed metadata about the email address.
Hunter Email Verifier API Pricing
- Free: $0/month, 25 monthly searches, 50 monthly verifications.
- Starter: $49/month or $34/month (yearly), 500 monthly searches, 1,000 monthly verifications.
- Growth: $149/month or $104/month (yearly), 5,000 monthly searches, 10,000 monthly verifications.
- Scale: $299/month or $209/month (yearly), 10,000 monthly searches, 10,000 monthly verifications.
- Enterprise: Custom pricing, includes dedicated account manager, higher rate limit, on-demand quotas, and flexible quotas.
4) Clearout Email Verification & Validation API

Clearout Email Verification & Validation API offers real-time email verification to ensure clean and high-quality data, preventing spam leads from entering at the point of capture. It includes various validation checks and features to maintain email list hygiene and improve email campaign success rates.
API Features
- Mailbox Error Verification: Verifies all kinds of mailbox errors without sending any payload to the given email address.
- SpamTrap Detection: Uses a multi-layered algorithm to determine the chances of an email address being a spam trap.
- Custom Email Verification Settings: Offers options to choose between the highest accuracy and fastest turnaround time based on user priorities.
Clearout Email Verification & Validation API Pricing
- Annual Subscription: Pay once a year and receive automatic credit allocation with up to a 20% discount. Credits never expire and can be carried forward.
- Monthly Subscription: Pay monthly and get automatic credit allocation with up to a 10% discount. Credits never expire and can be carried forward.
- One Time/Pay-As-You-Go: Make a one-time payment to instantly add credits to your account. Credits do not expire and can be topped up as needed.
- Custom Subscription Plans: For tailored plans, users need to contact support for more information and pricing details.
5) IPQS Email Address Verification

IPQS Email Address Verification is a comprehensive service that validates email addresses and identifies high-risk emails in real-time, ensuring over 99% accuracy through proprietary tests and extensive data collection. It helps reduce fraudulent activity, improve email deliverability, and maintain email list hygiene by performing hundreds of syntax and DNS checks to confirm the functionality of email inboxes.
API Features
- Real-time email address reputation scoring: Instantly scores email addresses to filter out low-quality and abusive users.
- Email age lookup: Provides an estimate of when the email account was first created to detect new and potentially risky domains.
- Detection of spamtraps, honeypots, and frequent complainers: Identifies email addresses that could negatively impact sender reputation and deliverability.
IPQS Email Address Verification Pricing
- Free Plan: Offers 5,000 free email verification lookups per month, including syntax, mail server, and DNS checks.
- Pay-As-You-Go: Users can pay for the number of email verifications they need without a subscription, providing flexibility for varying usage patterns.
- Monthly Subscription: Provides a set number of email verifications per month with the option to cancel anytime without a penalty.
- Annual Subscription: Offers a discounted rate for users who commit to a yearly plan, including all standard verification features.
- Enterprise Plan: Customizable plan with tailored features and support, aimed at organizations with specific needs and high-volume email validation.
What to Consider When Selecting a WhoisXMLAPI Email Verification API Alternative?
- Real-time Validation: Ensures that email addresses are verified instantly, reducing bounce rates and improving deliverability.
- Privacy Compliance: Adherence to regulations like GDPR and CCPA to protect user data and maintain trust.
- Integration Capabilities: Seamless integration with existing tools and platforms, including CMS, CRM, and marketing automation systems.
- Accuracy and Reliability: High accuracy rates and reliability, often guaranteed by uptime SLAs, to ensure consistent performance.
- Scalability and Pricing Options: Flexible pricing plans and scalability to accommodate varying usage patterns and business sizes.
Which One Should You Go With?
Choosing the right email verification API can significantly impact your email deliverability and overall campaign success. Each of the options discussed offers unique features and pricing plans to cater to different needs and business sizes. Whether you prioritize real-time validation, privacy compliance, or integration capabilities, 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, global coverage, and industry-leading accuracy, Abstract API ensures your email lists remain clean and high-quality. Sign up today to experience the benefits firsthand.