2) Mailboxlayer

Mailboxlayer is an email verification and validation API service designed for developers, offering a simple REST API to measure email deliverability and quality. It provides tools for syntax checking, SMTP verification, and more, ensuring that email addresses are real and high-quality.
API Features
- Full Verification: Ensures that email addresses are verified as they enter the system, providing real-time validation.
- Advanced Tools: Includes syntax & typo check, MX-Records & SMTP verification, catch-all detection, free & disposable email filtering, and deliverability score.
- Interactive Documentation: Allows users to try out API features as they go through the documentation, enhancing the learning and integration process.
Mailboxlayer Pricing
- 5,000 Verifications: $0.002 per verification, totaling $10.
- 10,000 Verifications: $0.0015 per verification, totaling $15.
- 25,000 Verifications: $0.0012 per verification, totaling $30.
- 50,000 Verifications: $0.001 per verification, totaling $50.
- 100,000 Verifications: $0.0009 per verification, totaling $90.
3) Verifalia

Verifalia offers an email verification API that ensures email addresses in your database are valid and deliverable, helping to improve sender reputation and maintain open lines of communication.
API Features
- Real-time Email Verification: Integrates seamlessly with various systems to prevent invalid emails at the point of entry, ensuring data quality from the start.
- Batch Email Validation: Allows for periodic checks of large email lists, maintaining data hygiene and eliminating bad data before it causes issues.
- Free and Open-source SDKs: Provides developers with easy integration options across multiple programming languages, enhancing flexibility and usability.
Verifalia Pricing
- Pay-as-You-Go Credit Packs: Ideal for one-time email list cleaning. Credits never expire and can be used to verify additional lists at any time.
- Ultimate: Offers 25,000 daily free credits, unlimited additional verifications, best effort processing speed, custom classification scheme, multiple quality levels, priority support, and 5,000 users/browser apps.
- Enterprise: Includes 6,250 daily free credits, unlimited additional verifications, best effort processing speed, custom classification scheme, multiple quality levels, priority support, and 1,000 users/browser apps.
- Professional: Provides 1,250 daily free credits, unlimited additional verifications, best effort processing speed, custom classification scheme, multiple quality levels, priority support, and 100 users/browser apps.
- Starter: Comes with 250 daily free credits, unlimited additional verifications, best effort processing speed, custom classification scheme, multiple quality levels, regular support, and 5 users/browser apps.
4) WhoisXMLAPI Email Verification API

WhoisXMLAPI Email Verification API offers a comprehensive solution for verifying the existence, validity, and quality of email addresses in real-time, helping to reduce email bouncing and block spam effectively.
API Features
- Syntax Check: Validates if the email address conforms to IETF standards using a complete syntactic email validation engine.
- Branded Address Check: Determines if the email address is custom and linked to a business email account or if it is generic and from a free email service.
- Disposable Address Check: Identifies if the email address is from a known disposable email provider such as Mailinator, 10MinuteMail, GuerrillaMail, and over 2,000 others.
WhoisXMLAPI Email Verification API Pricing
- Different pricing options for WhoisXMLAPI Email Verification API: Not explicitly listed on the page.
- Description of what each price point offers: Not provided directly on the page.
- Information on whether pricing is public or requires contacting support: Suggests contacting support for detailed pricing information.
- Specific details of what a person would be getting at each pricing option: Not provided directly on the page.
5) BytePlant Real Time Email Validation

BytePlant Real Time Email Validation is an API designed to ensure the quality of email addresses at the point of entry, using a multi-layer checking process to detect invalid, disposable, and mistyped email addresses, thereby improving deliverability and reducing bounce rates.
API Features
- Complete End-to-end Email Verification: Ensures the email address is valid and can receive emails by performing comprehensive checks.
- Misspelled Domain Detection: Detects and corrects common domain misspellings to prevent typosquatting.
- Greylisting Detection: Identifies greylisting, a method used by some email servers to temporarily reject emails from unknown senders, and suggests retrying after a delay.
BytePlant Real Time Email Validation Pricing
- Free Trial: Offers 1,000 free email address checks with no payment details required.
- Contact Support: BytePlant Real Time Email Validation's pricing is not public. Contact their support for more info.
What to Consider When Selecting a DeBounce Alternative?
- Real-time Verification: Ensures that email addresses are validated as they are entered, reducing the chances of invalid emails in your database.
- Advanced Tools: Includes features like syntax checking, typo detection, MX-Records & SMTP verification, and disposable email filtering to maintain high data quality.
- Privacy Compliance: Adheres to regulations such as GDPR and CCPA, ensuring that user data is handled securely and legally.
- Scalability: Offers both real-time and batch email validation options, making it suitable for various volumes of email data and different use cases.
- Customer Support: Provides extensive documentation, SDKs, and 24/7 technical support to assist with integration and troubleshooting.
Which One Should You Go With?
Each of the email verification services discussed offers unique features and benefits, making them all viable options depending on your specific needs. Whether you prioritize real-time verification, advanced tools, or privacy compliance, there's a solution that fits your requirements.
If you're looking for a robust alternative, we recommend signing up with Abstract API. With its comprehensive features, ease of integration, and strong customer support, Abstract API stands out as a top choice for ensuring the quality and deliverability of your email addresses.