2) Precisely Email Verification

Precisely Email Verification ensures the accuracy and validity of email addresses by cross-referencing them with a comprehensive database, reducing bounce rates and improving email deliverability.
API Features
- Real-Time Verification: Instantly checks the validity of email addresses as they are entered, ensuring immediate feedback.
- Syntax and Domain Check: Verifies the format and domain of email addresses to ensure they conform to standard email protocols.
- Disposable Email Detection: Identifies and flags temporary or disposable email addresses to maintain the quality of your email list.
Precisely Email Verification Pricing
Basic Plan: Offers limited access to email verification services with a cap on the number of verifications per month.
Standard Plan: Provides a higher limit on email verifications and includes additional features such as syntax and domain checks.
Premium Plan: Includes all features of the Standard Plan with an even higher verification limit and priority support.
Enterprise Plan: Customizable plan tailored to large organizations with specific needs and requirements. Contact support for more details.
Precisely Email Verification's pricing is not public. Contact their support for more info.
3) SEON Email Verification API

SEON Email Verification API verifies the validity and deliverability of email addresses using a fast SMTP-MX check, ensuring that your email list remains clean and effective.
API Features
- Fast SMTP-MX Check: The API quickly verifies whether an email address is valid and deliverable using an SMTP-MX check.
- Case-Sensitive API Requests: All API requests are case-sensitive, requiring precise formatting to avoid errors.
- US Transaction Processing Environment Endpoint: A specific endpoint is provided for users operating within the US Transaction Processing Environment.
SEON Email Verification API Pricing
- Basic Plan: Limited access to email verification services with a cap on the number of verifications per month.
- Standard Plan: Higher limit on email verifications and includes additional features such as syntax and domain checks.
- Premium Plan: All features of the Standard Plan with an even higher verification limit and priority support.
- Enterprise Plan: Customizable plan tailored to large organizations with specific needs and requirements. Contact support for more details.
- SEON Email Verification API's pricing is not public. Contact their support for more info.
4) Sendgrid Email Address Validation API

Sendgrid Email Address Validation API helps improve email deliverability by validating email addresses before sending. It uses real-time detection to suppress invalid email addresses, reducing bounce rates and enhancing performance with mailbox providers.
API Features
- Real-Time Detection: Validates email addresses instantly to ensure only valid addresses are added to your mailing list, reducing bounce rates.
- Machine Learning Models: Utilizes data from billions of emails to improve email address validity scoring and deliverability.
- Spam-Free Tactics: Avoids using spammer-affiliated methods like the broken SMTP-handshake, maintaining trust with mailbox providers.
Sendgrid Email Address Validation API Pricing
- Free: $0/month. Send 100 emails/day for free with 2,500 free email address validations included.
- Essentials: Starting at $19.95/month. Send 50,000 - 100,000 emails/month with 5,000 free email address validations included.
- Pro: Starting at $89.95/month. Send 100,000 - 2,500,000 emails/month with 5,000 free email address validations included.
- Premier: Custom pricing. Customize your plan for exactly what you need; contact sales for custom, high volume pricing.
5) ZeroBounce

ZeroBounce offers a comprehensive suite of email validation services, including real-time email validation, email activity data, and email scoring, designed to help businesses maintain clean email lists and improve email marketing ROI.
API Features
- 99% Accuracy Guarantee: ZeroBounce ensures a high level of accuracy in email validation, backed by a money-back guarantee.
- Advanced API Security: Utilizes military-grade data encryption to protect sensitive information during the email validation process.
- Custom Allowlists and Blocklists: Allows users to tailor email validation rules to meet specific needs, enhancing the flexibility and effectiveness of the service.
ZeroBounce Pricing
- Pay as You Go: Starts at $20 USD for validating 2,000 email addresses. Minimum purchase required, and credits can be added as needed.
- Subscriptions: Starts at $18 USD per month. Offers up to 18% savings depending on the number of emails to be validated, with unused credits rolling over each month.
- Included with all ZeroBounce Accounts: Credits never expire, unknown results are free, and detailed status codes are provided. Additional features include inbox placement tests, volume pricing, and 24/7 customer support.
- General Conditions: One credit is used per email address for services like email validation, AI Scoring, and Activity Data. Email Finder uses 20 credits per successful query.
- Additional Services: Credits are required for services like Activity Data and AI Scoring. Email Finder has specific rules for credit consumption, including zero credits for certain conditions like spam traps or disposable domains.
What to Consider When Selecting a NeverBounce Alternative?
- Real-Time Verification: Ensures that email addresses are validated instantly as they are entered, reducing bounce rates and improving deliverability.
- Accuracy and Reliability: Look for services that guarantee high accuracy rates, such as ZeroBounce's 99% accuracy guarantee, to ensure the quality of your email list.
- Security and Compliance: Choose a service that complies with privacy regulations like GDPR and CCPA, and offers robust data encryption to protect sensitive information.
- Integration Capabilities: Ensure the service can easily integrate with your existing platforms and tools, such as Salesforce, AWS, and Zapier, for seamless operations.
- Pricing and Scalability: Consider flexible pricing plans that fit your budget and the ability to scale as your email verification needs grow, including options for bulk operations and custom plans.
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 a clean and effective email list. However, if you're looking for a comprehensive solution that combines real-time verification, robust security, and seamless integration, we recommend Abstract API.
With its user-friendly interface, privacy compliance, and exceptional customer support, Abstract API stands out as a reliable alternative. Sign up today to experience the benefits of a top-tier email validation service.