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Head-to-head · Email Verification APIs

ZeroBounce vs BillionVerify

  • Updated Oct 2026
  • Both researched from official sources
  • 7 checks side by side
Higher score ZeroBounce #4 in Email Verification APIs 9.1/10 Free plan Free plan✓ 1 of 6 features Visit ZeroBounce
BillionVerify #7 in Email Verification APIs 8.8/10 Free plan Free plan✓ 6 of 6 features Visit BillionVerify

ZeroBounce leads on 0 checks, BillionVerify on 0, and 7 are even. Who comes out ahead on the 7 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreZeroBounce · 9.1/10
  • Free planboth
  • Most featuresBillionVerify · 6 of 6

ZeroBounce scores higher on our rubric for email verification apis: 9.1 against 8.8 out of 10; our editors rank them #4 and #7.

ZeroBounce is the better fit for feature-rich verification beyond basic validation. BillionVerify is the better fit for integrated batch verification with SDKs.

  • ZeroBounce fits best

    Feature-rich verification beyond basic validation

  • BillionVerify fits best

    Integrated batch verification with SDKs

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Side by side

Feature ZeroBounce 9.1/10 Visit ↗ BillionVerify 8.8/10 Visit ↗
At a glance
Editor score 9.1 8.8
Ranking #4 in Email Verification APIs #7 in Email Verification APIs
Best for Feature-rich verification beyond basic validation Integrated batch verification with SDKs
Pricing model Free plan + paid Free plan + paid
Starting price $79/mo $20 one-time
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Mobile Cloud
Platforms Web, iOS Web
Support Email, Live chat, Phone, Tickets, Docs · 24/7 Email, Docs
Compliance SOC 2, ISO 27001, GDPR, HIPAA, PCI DSS GDPR, PCI DSS
Integrations 60+ integrations 1,553+ integrations
Built for Solo, Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features ZeroBounce 1/6 · BillionVerify 6/6
Real-time API Not checked yet ✓ (best)
Batch verification Not checked yet ✓ (best)
Disposable detection ✓ ✓
Role account detection Not checked yet ✓ (best)
Catch-all detection Not checked yet ✓ (best)
SMTP mailbox check Not checked yet ✓ (best)
Our review
Pros
  • Real-time and batch API validation plus bulk list uploads
  • Adds scoring, Email Finder, inbox placement, blacklist, and DMARC monitoring
  • Integrates with HubSpot, Salesforce, Shopify, Mailchimp, and Zapier
  • Synchronous and asynchronous batch verification
  • Five SDKs plus webhooks for completed jobs
  • SMTP, disposable, role-account, and catch-all checks
Cons
  • Free-account eligibility requires a business or premium domain
  • Pay-As-You-Go credits are purchased as a one-time package
  • The broad feature set may exceed the needs of basic validation users
  • Free usage is limited to 20 daily and 600 monthly credits
  • Starter is a one-time 20,000-credit package
  • Batch work centers on CSV, TXT, and XLSX file processing
Our verdict

ZeroBounce is an email verification and deliverability platform for businesses, marketers, developers, and agencies. It validates individual addresses, uploaded lists, and programmatic submissions through a real-time API or batch API. Its…

Read the review →

BillionVerify is an email verification service for developers, sales teams, marketers, agencies, and enterprises. It supports real-time single-email checks through a REST API, synchronous and asynchronous batch verification, and file…

Read the review →
  1. ZeroBounceEmail Verification APIs 9.1Free plan
  2. BillionVerifyEmail Verification APIs 8.8Free plan

Strengths and trade-offs

  • ZeroBounce — where it wins

    • Real-time and batch API validation plus bulk list uploads
    • Adds scoring, Email Finder, inbox placement, blacklist, and DMARC monitoring
    • Integrates with HubSpot, Salesforce, Shopify, Mailchimp, and Zapier

    Where it doesn't

    • Free-account eligibility requires a business or premium domain
    • Pay-As-You-Go credits are purchased as a one-time package
    • The broad feature set may exceed the needs of basic validation users

  • BillionVerify — where it wins

    • Synchronous and asynchronous batch verification
    • Five SDKs plus webhooks for completed jobs
    • SMTP, disposable, role-account, and catch-all checks

    Where it doesn't

    • Free usage is limited to 20 daily and 600 monthly credits
    • Starter is a one-time 20,000-credit package
    • Batch work centers on CSV, TXT, and XLSX file processing

More comparisons

All email verification APIs comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update