2) 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 and maintaining email list hygiene.
API Features
- Guaranteed Deliverables: Instantly identifies 100% valid email addresses in the result file, enhancing the success rate of email campaigns.
- Real-time email verification via API: Allows seamless integration with forms or CRM data flow to prevent spam leads from entering at the point of capture, ensuring clean and high-quality data.
- Custom Allowlist/Blocklist: Provides control over the email verification process by allowing the creation of custom lists to allow or block specific email addresses or domains, tailored to unique needs.
Clearout Email Verification & Validation API Pricing
- Annual Subscription: Pay once a year. Credits are automatically added to your account for uninterrupted access. Offers a discount of up to 20%.
- Monthly Subscription: Pay monthly. Receive credits automatically to keep your account active without interruption. Offers a discount of up to 10%.
- One Time/Pay-As-You-Go: Make a one-time payment. Instantly add credits to your account whenever needed.
3) IPQS Email Address Verification

IPQS Email Address Verification validates email addresses and identifies high-risk emails in real-time, ensuring over 99% accuracy through proprietary tests and extensive data collection. This service helps reduce fraudulent activity and improves email deliverability by performing hundreds of syntax and DNS checks to confirm the functionality of email inboxes.
API Features
- Email Risk Scoring: Scores email addresses based on their risk level, identifying those involved in fraudulent activities using data from millions of user events daily.
- Detection of Disposable and Temporary Email Addresses: Detects and blocks emails from disposable or temporary services, preventing fraudsters from exploiting free trials or downloads.
- Bulk Email Validation & List Cleaning: Allows bulk verification of email addresses, filtering out invalid and high-risk emails to improve sender reputation and reduce bounce rates.
IPQS Email Address Verification Pricing
- 5,000 FREE Email Verification Lookups Per Month: Users can perform up to 5,000 email verification lookups for free each month.
- Verify Emails Exists with All Mail Service Provider: The service can verify email addresses from all major mail service providers like Gmail, Yahoo, AOL, Hotmail, etc.
- Syntax, Mail Server, & DNS Checks: The email verification process includes syntax, mail server, and DNS checks to ensure accuracy.
- Spamtrap Removal & List Hygiene: The service helps in removing spamtraps and maintaining email list hygiene by detecting invalid addresses.
- STMP Server Verification: The service can detect temporary and disposable emails through SMTP server verification.
4) EmailValidation

EmailValidation offers a robust API for real-time email validation, ensuring fast, stable, and easy integration with clear JSON responses. It checks for SMTP, MX records, disposable status, and more, making it suitable for various use cases.
API Features
- Real-time Email Validation Playground: This feature allows users to validate any email address in real-time directly on the webpage, providing immediate feedback on various validation parameters.
- Clear Data Structure: The API endpoints provide easy-to-read JSON responses, ensuring straightforward integration and long-term support for developers.
- Wide Variety of Use Cases: The API is versatile and can be used for various purposes, demonstrating its flexibility and broad applicability for different business needs.
EmailValidation Pricing
- Free: Offers 100 credits per month with basic features like Email Validator, Email Finder, and LinkedIn Email Finder.
- Small: Priced at $9.99/month, this plan includes 5,000 credits and features such as bulk processing and team management.
- Medium: Costs $34.99/month and provides 25,000 credits, suitable for medium-sized projects and businesses.
- Large: Available for $94.99/month, offering 100,000 credits and additional API keys for larger projects.
- Custom Plan: Tailored solutions for unique business needs; contact support for more information.
5) Quick Email Verification

Quick Email Verification provides real-time and batch email verification services through an API, helping businesses collect valid email addresses, prevent fake registrations, and maintain high-quality email lists.
API Features
- Real-Time Email Verification: Instantly verifies email addresses as they are entered, ensuring only valid emails are collected.
- Batch Email Verification: Allows bulk verification of large email lists, automating the process and removing invalid addresses.
- Ready Libraries for Multiple Programming Languages: Provides pre-built libraries for languages like PHP, Node.js, Ruby, and Python, simplifying integration.
Quick Email Verification Pricing
- Freemium Plan: Verify up to 100 email addresses for free daily.
- One-Time Plan (Pay as you go): Persistent credits that never expire, with volume options ranging from 500 to 5 million email verifications.
- Daily Plan (Pay monthly): Per day credits with a monthly subscription, offering volume options from 100 to 50,000 email verifications per day.
- Custom High-Volume Plans: Tailored for agencies or enterprises with high-volume needs, requiring contact with support for pricing details.
What to Consider When Selecting a Hunter Email Verifier API Alternative?
- Real-Time Verification: Ensures that email addresses are validated instantly as they are entered, preventing invalid emails from entering your database.
- Accuracy and Reliability: Look for services that offer high accuracy rates, typically over 99%, to ensure the validity of email addresses and reduce bounce rates.
- Security and Compliance: Choose APIs that comply with data privacy regulations like GDPR and CCPA, and offer robust security measures to protect user data.
- Integration Capabilities: Ensure the API can easily integrate with your existing tools and platforms, such as CRM systems, marketing platforms, and web forms.
- Customizable Features: Opt for APIs that offer customizable settings, such as custom allowlists/blocklists and various verification parameters, to tailor the service to your specific needs.
Which One Should You Go With?
Each of the email verification services discussed offers unique features and benefits, making any of them a solid choice for maintaining clean and high-quality email lists. However, if you're looking for an alternative that combines comprehensive checks, real-time verification, and robust security measures, we recommend signing up with Abstract API.
Abstract API stands out with its industry-leading accuracy, privacy-friendly practices, and extensive feature set, including real-time MX and SMTP checks, typo detection, and disposable email detection. Whether you're a small business or an enterprise, Abstract API provides scalable solutions to meet your email verification needs. Sign up today and experience the difference.