Guides
Last updated
March 10, 2025

Top 5 WhoisXMLAPI Email Verification API Alternatives in 2025

Nicolas Rios

Table of Contents:

Get your free
Phone Validation
API key now
4.8 from 1,863 votes
See why the best developers build on Abstract
START FOR FREE
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
No credit card required

WhoisXMLAPI Email Verification API performs a comprehensive validation of email addresses in real-time and conveniently. However, this product might not be suitable for everyone.

This article will list five alternatives to WhoisXMLAPI Email Verification API. These options provide various features and benefits that may better suit different needs and preferences.

Best Alternatives to WhoisXMLAPI Email Verification API in 2025

1) Abstract API

Abstract API

At Abstract API, we offer a comprehensive suite of APIs designed to enhance various functionalities, including email validation. Our Email Validation API helps improve email delivery rates by validating email addresses in real-time, checking for syntax errors, disposable emails, and performing MX & SMTP checks. This ensures that your email lists are clean and your messages reach their intended recipients.

API Features

  • Real-time MX & SMTP check: Validates email addresses by checking their mail exchange records and SMTP servers in real-time.
  • Typo checking and smart suggestion: Detects common typos in email addresses and provides smart suggestions for corrections.
  • Disposable and free email providers check: Identifies email addresses from disposable and free email providers to maintain list quality.
  • Privacy friendly (GDPR, CCPA): Ensures compliance with privacy regulations like GDPR and CCPA, safeguarding user data.
  • Industry-leading risk & quality score: Assigns a risk and quality score to email addresses to help assess their validity and reliability.
  • Smart learning at scale: Utilizes machine learning to improve validation accuracy over time.
  • Toxic domain detection: Flags email addresses associated with toxic domains to prevent spam and fraud.
  • Catch-all email detection: Identifies domains that accept all emails, regardless of the recipient, to help manage email list quality.

These are just a few of Abstract API's many features. Check them out here to learn more.

Abstract API Pricing

  • Starter Plan - $19/month: Includes 10,000 API calls per month, 3 requests per second, and domain whitelisting.
  • Basic Plan - $39/month: Offers 25,000 API calls per month, 5 requests per second, and domain whitelisting.
  • Standard Plan - $69/month: Provides 50,000 API calls per month, 10 requests per second, domain whitelisting, and multiple API keys.
  • Business Plan - $99/month: Grants 100,000 API calls per month, 25 requests per second, domain whitelisting, and multiple API keys.
  • Professional Plan - $199/month: Allows for 250,000 API calls per month, 50 requests per second, domain whitelisting, and multiple API keys.
  • Growth Plan - $499/month: Includes 750,000 API calls per month, 100 requests per second, domain whitelisting, and multiple API keys.

Contact us if you would like a plan based on your specific needs like a custom solution for your specific needs by contacting us.

What Are Users Saying?

Users consistently praise Abstract API for its accuracy, ease of use, and cost-effectiveness.

  • "Accurate email verification, I tested a different amount of times." - Isa M.
  • "I use the Abstract API for email validation. It helps us check if email is valid or not. It gives quality score and deliverability of the email which reduces bounce rate for my emails. We can also do email validation in bulk by passing a list of email." - Verified User in Retail

Try Out Our API

Let’s send your first free
Phone Validation API
call
See why the best developers build on Abstract
Get your free api
Enter an IP address to start
Need inspiration? Try
73.162.0.1
VALIDATE
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Checking
5
Results for
ip address
Country:
TEST
Region:
TEST
City:
TEST
Coordinates:
TEST
Zip code:
TEST
Connection:
TEST
Get free credits, more data, and faster results
Let’s send your first free
Email Validation API
call
See why the best developers build on Abstract
Get your free api

2) BytePlant Real Time Email Validation

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

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

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

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?

  1. Real-time Validation: Ensures that email addresses are verified instantly, reducing bounce rates and improving deliverability.
  2. Privacy Compliance: Adherence to regulations like GDPR and CCPA to protect user data and maintain trust.
  3. Integration Capabilities: Seamless integration with existing tools and platforms, including CMS, CRM, and marketing automation systems.
  4. Accuracy and Reliability: High accuracy rates and reliability, often guaranteed by uptime SLAs, to ensure consistent performance.
  5. 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.

Nicolas Rios

Head of Product at Abstract API

Get your free
Phone Validation
key now
See why the best developers build on Abstract
get started for free
Get your free
IP Geolocation
key now
See why the best developers build on Abstract
get started for free
Get your free
Email Validation
key now
See why the best developers build on Abstract
get started for free

Related Articles

Get your free
Phone Validation
key now
4.8 from 1,863 votes
See why the best developers build on Abstract
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
No credit card required
Get your free
IP Geolocation
key now
4.8 from 1,863 votes
See why the best developers build on Abstract
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
No credit card required
Get your free
Email Validation
key now
4.8 from 1,863 votes
See why the best developers build on Abstract
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
No credit card required