Last updated 07-01-2026
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Bouncer
Bouncer is an email verification platform that checks whether addresses on your mailing lists are deliverable before you send. Marketers, agencies, and SaaS teams use it to scrub bulk lists, validate sign-up forms in real time, and keep bounce rates from damaging sender reputation.
What sets Bouncer apart is depth on tricky addresses. It verifies catch-all inboxes on Google and Microsoft, anti-spam filter protected mailboxes, and niche provider setups, reporting less than 2% unknown results. The platform also estimates bounce risk before you spend credits and flags toxic or disposable addresses separately from standard invalid entries.
Beyond list uploads, Bouncer offers a REST API for real-time and batch validation, Bouncer Shield for form-level blocking, Toxicity Check, a Deliverability Kit for inbox placement testing, CRM integrations, and AutoClean for ongoing list hygiene. The company is based in Wroclaw, Poland, hosts data in the EU, and has verified more than 4 billion email addresses since launching in 2017.
Verifies catch-all Google and Microsoft inboxes that most checkers mark unknown
Flags less than 2% of results as unknown across global email providers
Estimates bounce risk from a free list sample before you spend verification credits
Real-time and batch API with up to 180,000 addresses verified per hour
Bouncer Shield blocks invalid and fraudulent emails at form entry without coding
Toxicity Check spots spam-trap-prone and low-quality addresses in bulk lists
Deliverability Kit runs inbox placement, SPF, DKIM, DMARC, and blocklist tests
Pay-as-you-go credits never expire, so you are not locked into unused monthly allotments.
Unknown and duplicate verification results are not deducted from your credit balance.
Deep verification handles catch-all, anti-spam protected, and niche provider addresses with under 2% unknown results.
Free list sampling and bounce estimates help you decide whether a full verification run is worth the cost.
GDPR-compliant by design with EU hosting and anonymized logging outside the results layer.
Bulk list uploads are limited to CSV format with no mention of other file types.
Deliverability Kit and Bouncer Shield are priced separately from core verification credits.
Accounts using personal email domains like Gmail may require manual review before verification runs.
Does Bouncer offer free email verification credits?
Yes. Bouncer includes 100 free verification credits when you sign up, and no credit card is required to start. You can also run a free email list sampling check to estimate list quality before purchasing credits.
Do Bouncer verification credits expire?
No. Bouncer pay-as-you-go email verification credits never expire, so you can buy them when needed and use them on your own schedule. Volume discounts apply as you purchase larger credit packs.
How much does Bouncer email verification cost?
Bouncer charges per credit, with one credit equal to one verified email. Pricing starts at $8 for 1,000 credits ($0.008 per email) and drops to $2 per 1,000 emails on a 1,000,000-credit purchase. Unknown and duplicate results are not charged.
Is Bouncer GDPR compliant?
Yes. Bouncer is GDPR compliant by design. Verified addresses are stored only in the results layer you download, while other system logs anonymize addresses. You can also remove addresses via API after downloading results.
What file format does Bouncer accept for list uploads?
Bouncer accepts CSV files for bulk email list verification. You upload the file through the web app, run verification, and download results with deliverability status, reason codes, and address characteristics.
Does Bouncer offer an email verification API?
Yes. Bouncer provides synchronous and asynchronous email verification API endpoints for real-time form validation and bulk batch jobs. The API supports batch sizes up to 500,000 addresses with rate limits of 1,000 real-time requests per minute.
What integrations does Bouncer support?
Bouncer connects to popular marketing and CRM platforms through native integrations so you can import lists, verify them, and export clean contacts without manual file handling. A full integration list is available on the Bouncer integrations page.