Accurate Email Verification at 1/5th the Price.
Protect your sender reputation and cut bounce rates below 1%. Clean your lists without overpaying: credits never expire, and unknown results are always 100% free.
Test Our Engine in Real Time
Type an email address and our engine will verify its syntax, DNS, and mailbox status right now.
High-Accuracy Verification. None of the Enterprise Markup.
See how NullBounce compares to mainstream alternatives on pay-as-you-go verification.
| Feature & Volume | NullBounce | ZeroBounce | NeverBounce |
|---|---|---|---|
| 10,000 emails | $15 | $129 | $50 |
| 50,000 emails | $50 | $499 | $250 |
| 100,000 emails | $90 | $649 | $400 |
| Minimum purchase order | $5 (1,000 emails) | $39 (2,000 min) | $8 (1,000 min) |
| Credits expiration without subscription | Never expire (Forever) | Conditional (Requires ZeroBounce One™) | Expire in 365 days |
| Free test credits upon sign-up | 100 credits | 100 credits | 10 credits |
*Pricing and terms reflect publicly listed pay-as-you-go rates as of 2026. ZeroBounce and NeverBounce are registered trademarks of their respective owners.
Buy Only What You Need. Down to a Single Lead.
Have a list of 11,350 contacts? Don't pay for 25,000. In NullBounce, you buy the exact number of credits your list requires.
100% Data Integrity. We Never Mess Up Your Spreadsheets.
Engineered for marketers, SDRs, and CRM operators who hate repairing ruined CSV files.
| First Name | Company | Email (Col C) | Custom Tag |
|---|---|---|---|
| Sarah | Acme Inc | sarah@acme.com | tier_1_lead |
| Michael | Nova Labs | mike@novalabs.io | inbound_demo |
| Elena | Global Sol | elena@dead-domain.net | webinar_attendee |
| EMAIL (Col A) | RESULT | DELIVERABLE | First Name | Company |
|---|---|---|---|---|
| sarah@acme.com | Safe | Valid | Sarah | Acme Inc |
| mike@novalabs.io | Safe | Valid | Michael | Nova Labs |
| elena@dead-domain.net | Invalid | Invalid | Elena | Global Sol |
We extract the Email column to the very first position (Column A) so your Excel formulas work instantly. Meanwhile, your row sequence and custom CRM variables remain in the exact same order for error-free mapping.
Duplicate emails are detected completely free of charge. You pay only once per unique email address, and you can choose whether to keep or remove duplicates in your downloaded file.
Our parser automatically handles comma and semicolon delimiters, multi-line values, UTF-8 encodings, and international accents in contact names without corrupting your data.
Actionable Statuses. No Confusion.
Every contact receives a clear classification so you know exactly which emails are safe to mail.
Deliverable
Mailbox exists and actively accepts incoming emails. Bounce rate < 1%. Safe for your primary sending domains.
Invalid
Domain does not exist, mailbox is deleted, or address has fatal typos. Delete these to protect your sender score.
Risky
Includes Catch-All domains (servers accepting any username) and Role-Based addresses (e.g., support@, info@). We isolate them so you can choose your risk tolerance.
Unknown
The destination mail server timed out or was temporarily unresponsive. We never charge credits for unknown statuses.
Your Contact Lists Are Safe With Us
Enterprise-grade privacy standards applied to every verification job.
256-Bit SSL Encryption
All file uploads, API requests, and downloads are protected by modern end-to-end TLS encryption.
Auto-Wiped in 30 Days
Uploaded lists and validation results are permanently purged from our servers after 30 days. You can also delete them manually at any time.
Zero Data Sharing
We never sell, rent, or share your proprietary lead lists with third parties. Your data is strictly yours.
No Real Emails Sent
Our engine performs technical DNS and SMTP handshakes, terminating before delivery. Your contacts will never receive test messages.
Simple REST API for Real-Time Verification
Protect your registration forms, SaaS checkouts, and backend pipelines from disposable emails, typos, and toxic leads with a single lightweight HTTP request.
- ✓Real-Time Synchronous Validation: Designed for live sign-up forms, user onboarding, and webhook listeners.
- ✓Rich Diagnostic Attributes: Returns deliverability status, disposable domain flags, role-based accounts (info@), and free webmail detection.
- ✓Instant API Key & Free Credits: Start testing in seconds with 100 free credits upon sign-up — no credit card required.
- ✓Copy-Paste Snippets for 9+ Languages:Full documentation with implementation examples for Python, PHP, Node.js, Ruby, Go, Java, and more.
{
"email": "alex@company.com",
"result": "Safe",
"status_text": "Valid",
"substatus_text": null,
"is_disposable": false,
"is_role": false,
"is_free": false
}Frequently Asked Questions
Do my verification credits ever expire?
No. Credits never expire. You can purchase credits today and use them months or years later without any extra fees.
Do you send real emails to my contacts?
No, never. We verify mailboxes using DNS lookups and simulated SMTP handshakes without actually sending an email.
What happens with 'Unknown' results?
You only pay for successfully classified emails (Valid or Invalid). All Unknown results are completely free and consume zero credits.
Can I invite team members?
Yes. NullBounce supports multi-user Team Accounts at no extra cost. You can share a single credit balance across your entire team.
Ready to Clean Your Email List?
Register in 30 seconds and test your first 100 email verifications for free.