Privacy
zerobounce.ai is run by Hertza L.L.C., doing business as ZeroBounce. The tools are free and have no accounts, no ads, no analytics and no trackers, and the site sets no cookies of its own. We don’t sell your data, use it for advertising or build profiles of visitors. The services that make the tools work do process what you enter, and may log it under their own policies. Last updated 14 October 2026.
Who we are
Hertza L.L.C., doing business as ZeroBounce, a Nevada limited liability company, 10 E. Yanonali St., Santa Barbara, California 93101, USA (“we”, “us”). We decide how the data described here is used. For anything on this page, including a request about your data, email support@zerobounce.net. zerobounce.ai is separate from ZeroBounce’s paid service: what you do here isn’t linked to a ZeroBounce account or used for ZeroBounce’s marketing. The tools themselves come with no support; see the terms of use.
What is processed
- Visiting the site. Like any website, your IP address, browser details and the page you request pass through our hosting provider, Cloudflare, which uses them to deliver and protect the site and keeps security logs under its own policy. We can see sampled security records for up to 31 days. A page on another site that shows our sender-rules badge makes its visitors’ browsers request the badge from us in the same way.
- What you check. The domain, IP address, link or email address you enter, or the message you paste, is processed in your browser, on our servers and by the services listed below, only to answer that check. Some inputs, including email addresses, can appear in the page address so results can be shared; page addresses pass through Cloudflare like any web address. The browser privacy test shows back the headers your browser sends; they aren’t kept.
- Usage limits. Your IP address (for IPv6, its /48 network) is used to enforce usage limits: for about a minute; until the end of the day for the live email check; and for the free API and MCP server, a daily count per network kept under a one-way hash of the address. Daily counts are deleted within two days.
- Our logs. Which tool ran, whether it worked and how long it took, kept for 7 days without your IP address or what you entered.
- Caches. Results are kept from a few minutes up to 24 hours so repeat checks are faster. Caches don’t record who asked; results about an email address are stored under a hash of it. Public lists and network data that aren’t about you (blocklists, disposable-domain lists, network types) are kept up to 7 days.
- Your browser. Your theme, recent inputs and similar settings stay in your browser’s storage and are never sent to us. You can clear them at any time.
- Email test. A message you send to email-test@zerobounce.ai is read automatically to send you a report and is not stored by us; the sending server and the domains in it are checked against public blocklists, and a hash of the sender’s address and domain is kept for two days to enforce the test’s limits. Cloudflare keeps mail logs and may keep short-lived copies of the messages it sends.
Services that receive data
| Name | Data | Purpose | Country |
|---|---|---|---|
| Cloudflare, Inc. | IP address, browser details, pages requested, what you check, email-test messages | Hosting, security, DNS lookups, email, PDF creation | United States (global network) |
| Google LLC | Domains, links and names being checked; your IP address when your browser falls back to Google’s DNS | Malware and phishing checks (Web Risk, Safe Browsing site status), real-user speed data (Chrome UX Report), DNS lookups, VirusTotal reputation | United States |
| Anthropic, PBC | The domain or email address checked, with its check results; bounce messages you paste | AI-written explanations | United States |
| LeakCheck | The email address checked | Data leak check | United Kingdom |
| Spamhaus, Abusix and other public DNS blocklists | IP addresses and domains checked | Blocklist checks | United Kingdom, Germany, United States and others |
| Domain registries, RIPEstat, Team Cymru, PeeringDB | Domains, IP addresses and network numbers checked | Registration and network data | Various |
| The sites and mail servers you check | A request from our servers (for the live email check, the address) | Running the check | Various |
Each provider handles data under its own privacy policy and may keep logs. We are in the United States, and data may be processed there and in other countries; where the law requires it, transfers rely on the providers’ own safeguards, such as the EU-U.S. Data Privacy Framework or standard contractual clauses.
If someone checks your email address
Anyone can enter an email address. If it’s yours, we process it only to answer that check: whether it can receive mail, whether it appears in known data breaches (breach names, dates and types of data, never the data itself) and, in some tools, an AI-written summary. The sources are the person who entered it, your mail server, LeakCheck and Have I Been Pwned’s public breach list. We don’t try to identify you, and nothing is kept beyond a cache of up to 24 hours. We do this because these checks help people fix email problems and protect their accounts. You have the right to object to this processing.
Legal basis and your rights
For the EU, the UK and similar laws: we rely on our legitimate interest in offering free and secure tools, and on providing the check you ask for. You have the right to access, correct or delete data about you, to restrict or object to its use, and to complain to your data protection authority. To use these rights, email support@zerobounce.net. Most of what we process is not linked to your identity and is kept only for the periods listed above, so there may be nothing we can find about you.
United States
We don’t sell or share personal information and don’t track you across sites, so Do Not Track and Global Privacy Control signals have nothing to switch off.
Children
Not intended for children under 13 (under 16 in the EU and UK).
Changes
We may update this page; the date at the top shows the current version. The terms of use cover how the tools may be used.