NullBounce is unclaimed —

NullBounce

Accurate Email Verification at 1/5th the Price.·nullbounce.com

NullBounce is an email verification service that cleans bulk email lists and validates addresses in real time via a REST API. It classifies each contact as Safe, Invalid, Risky, or Unknown, flagging disposable, role-based, and catch-all addresses. Users buy credits to verify exactly the number of emails they need, and credits never expire.

What it's for

Bulk cleaning of email lists uploaded as CSV filesReal-time email verification at sign-up forms and SaaS checkoutsProtecting sender reputation and reducing bounce ratesDetecting disposable, role-based, and catch-all email addressesDeduplicating email lists without extra chargeIntegrating verification into backend pipelines and webhook listeners

Features 17

256-bit SSL/TLS encryption for uploads and API calls
API key management dashboard
Auto-handles comma/semicolon delimiters, multi-line values, UTF-8 and accented characters
Automatic data wipe after 30 days
Bulk email list validation via CSV upload
Catch-all domain detection
Code snippets for Python, PHP, Node.js, Ruby, Go, Java and more
Deliverability classification: Safe, Invalid, Risky, Unknown
Disposable/temporary email detection
DNS and simulated SMTP handshake checks (no real emails sent)
Free-webmail detection
Multi-user Team Accounts with shared credit balance
Non-destructive deduplication (charged once per unique email)
Preserves original row order and column structure for VLOOKUP-ready output
Real-time single email verification
REST API for live sign-up form and pipeline validation
Role-based address detection (e.g. support@, info@)

At a glance

free trialAPI

TypeWeb app

DeploymentCloud

PlatformsWeb

Formarketers, SDRs, CRM operators

Complianceself-reported

GDPR

Resources

Pricing

Pricing is pay-as-you-go: 10,000 emails $15, 50,000 emails $50, 100,000 emails $90, with a $5 minimum purchase (1,000 emails). Credits never expire and unclassified 'Unknown' results are never charged. Comparison table cites these as 'publicly listed pay-as-you-go rates as of 2026' versus ZeroBounce and NeverBounce.

Pay As You GoQuote

No monthly subscription; purchase is a one-off credit top-up, not a recurring charge.

Buy only the exact number of credits needed; minimum purchase 1,000 emails ($5)