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CSA STAR Listed - GDPR Compliant - UK Ltd Registered Security You Can Trust With Your Contact Data Every email you verify with BounceZero is processed under strict security controls. Here's exactly how we handle your data. Start Free - 100 Credits Report a Vulnerability How We Handle Your Data End-to-end protection from the moment your data enters our pipeline to the moment it leaves. Data in Transit TLS 1.3 encryption on all API connections. Your email list never travels unencrypted. Data at Rest Encryption at rest. Infrastructure locations and transfer safeguards are documented in the Privacy Policy and DPA. Data Retention Bulk job results kept 90 days then permanently deleted. Single-check results purged after 24 hours. GDPR & Privacy Compliance BounceZero Ltd is a UK registered company (No. 17153835) operating under UK GDPR. We act as a data processor when verifying your contact lists. We do not sell, share, or use your email data for any purpose other than verification. Your data is yours - we just tell you which addresses are real. Compliance Checklist UK GDPR compliant (UK Ltd, No. 17153835) Infrastructure and subprocessors documented in the DPA No third-party data sharing Right to erasure - request via [email protected] Data Processing Agreement (DPA) available on request API keys are hashed - not stored in plaintext Webhook signing secrets to verify payload integrity CSA STAR Level 1 - publicly listed in the registry Infrastructure Security Multiple layers of protection across every component of our stack. API Authentication Bearer token auth. API keys are SHA-256 hashed in the database. Rate Limiting Per-endpoint rate limits prevent abuse and protect your account. Webhook Signatures HMAC-SHA256 signed payloads. Verify every webhook delivery. No Plaintext Storage Email addresses in bulk jobs are never logged to disk. Audit Logging All credential reveals and sensitive actions are audit-logged. UK Company Incorporated in England & Wales. Accountable to UK regulatory framework. Certifications & Registries Independently verifiable third-party registrations - not self-declared. Click any badge to verify. CSA STAR Level 1 ✓ Listed Apr 2026 Self-assessment against the CAIQ v4 questionnaire - 261 controls across 17 security domains. Publicly verifiable in the CSA STAR Registry. View our registry entry Google Postmaster ✓ All Green All 8 sender compliance checks passing - domain reputation, SPF, DKIM, DMARC, spam rate, and delivery errors all verified. View Postmaster Tools G2 Verified Vendor ✓ Listed Apr 2026 Verified vendor profile in the Email Verification and Data Quality categories on G2 - the world's largest B2B software review platform. View our G2 profile NVIDIA Inception ✓ Program Member Accepted into NVIDIA's Inception Program for AI/ML startups - recognising BounceZero's use of machine learning in email deliverability intelligence. Learn about Inception Microsoft SNDS ✓ Registered All probe IPs registered with Microsoft Smart Network Data Services. IP reputation monitored and clean across Outlook and Hotmail infrastructure. Learn about SNDS How BounceZero Support Contacts You Attackers impersonate support teams. These rules never change, so you can always tell the difference. We will never ask you for any of these Your password, on any channel, for any reason. A support PIN, verification code, or two-factor code. Your API key. We can see what we need without it, and we can issue you a new one. Card numbers or full billing details over chat or email. Access to a different account, or credentials belonging to a colleague. Remote access to your machine, or installation of any software. Every ticket lives in your dashboard If we have an open case with you, you can see it signed in to your account. A conversation that exists only in your inbox or a chat window is not from us. A reference number proves nothing Anyone can invent a case ID and quote it to you. Verify it the other way round: sign in and look for the ticket yourself. If it is not there, the request is not ours. We only email from bouncezero.io Our mail is SPF, DKIM and DMARC authenticated. Check the sending domain, not the display name — a display name costs an attacker nothing to fake. Urgency is the tell Warnings that your domain, account or email is at risk unless you act immediately are pressure tactics. Nothing we need from you is ever time-critical in that way. Contacted by someone claiming to be BounceZero support? Forward it to [email protected] and do not reply to them. Found a Security Vulnerability? We take security seriously. Email [email protected] and we'll respond within 48 hours. Report to [email protected] Legal & Policy Documents Privacy Policy How we collect and protect your data Terms of Service Rules governing use of BounceZero Data Processing Agreement DPA for enterprise and compliance teams Follow BounceZero LinkedIn Follow us BounceZero company & trust Verify our credentials, read honest reviews, compare with alternatives Customer stories Real results from agencies, SaaS teams, cold emailers Press & media kit Company facts, founder bio, logo downloads BounceZero Pricing From $0.003/credit - plans for every volume About BounceZero Who we are, what we do, how we verify Founder - Ayoub Lebda Meet the founder behind BounceZero Changelog Product updates, fixes, and releases Continue through related topics BounceZero product facts Email verification research Bulk email validation Wait - Before You Go Get 100 Free Credits Every Month Verify 100 emails free every single month - no credit card, no commitment. See exactly why BounceZero catches what others miss. No credit card required - Credits never expire ✓ Check your inbox - your free credits are on the way!