Have I Been Pwned Review
The fastest way to confirm whether an email address appears in known data breaches — free, accurate, and maintained by a single researcher who vets every dataset.
Quick Verdict
Quick triage on whether a target email address has been exposed, and domain-wide breach monitoring for small security teams at minimal cost.
Pros
- + Free individual email lookups with no account required
- + 14+ billion records from 700+ manually verified breaches
- + Pwned Passwords endpoint uses k-anonymity — your password hash is never transmitted in full
- + Domain search API at $3.50/mo returns every exposed address across your entire domain
- + Breach data is manually vetted by Troy Hunt before inclusion — no junk or unverified dumps
- + Free API available for personal/non-commercial use with no authentication needed
Cons
- − Returns breach name only — no plaintext passwords, usernames, or other credential fields
- − Free API rate-limited to roughly one request per 1.5 seconds — too slow for bulk lookups
- − Pastes feature is less maintained and less reliable than the breach database
- − No search by username, phone number, IP, or name — email is the only lookup key
- − Commercial API use requires a paid key; pricing for high-volume use isn't publicly listed
What Have I Been Pwned Is
Troy Hunt, an Australian security researcher, built and maintains Have I Been Pwned (HIBP), a breach notification service. Over 700 verified incidents and 14 billion accounts are indexed. You can check if an email address has been compromised.
HIBP's manual vetting process sets it apart. Every breach gets reviewed by Hunt before inclusion, and unverified claims and inflated row counts get weeded out.
When you query an email address, you'll get a list of breach names where that address appeared, not the underlying credential record. The design prioritizes privacy over providing sensitive information. Users get enough information to take action, while operators get nothing they shouldn't.
The Pwned Passwords endpoint works similarly. It checks if a password has been breached without transmitting the actual password. Security researchers use it to discover exposed assets, and individuals use it to secure accounts. HIBP provides value to both groups, with high data quality.
What It's Good For
HIBP excels in specific use cases. It is a go-to for initial email triage in OSINT investigations, giving you a history of an email address's exposure. Cross-reference breach names and dates, and you can start building a timeline. You can identify where a username might have originated. The Pwned Passwords endpoint is a solid choice for checking password hygiene. It uses k-anonymity to keep your plaintext passwords safe. The domain search API offers a cost-effective breach monitoring solution for small organizations, at $3.50/mo per domain, and it works.
Getting Started
No account is needed for a one-off email search. Head to haveibeenpwned.com, type in an email address, and you'll see the results.
For heavier usage, the free API tier works for personal projects. You can make about one request per 1.5 seconds.
# Free API — no auth required, personal use
curl "https://haveibeenpwned.com/api/v3/breachedaccount/target@example.com" \
-H "hibp-api-key: YOUR_KEY" \
-H "user-agent: YourAppName"
API keys are required for heavy use. The Pwned Passwords API is an exception, no API key is needed.
# Pwned Passwords — k-anonymity model, no API key needed
# Hash password locally first, send only first 5 chars of SHA-1
curl "https://api.pwnedpasswords.com/range/5BAA6"
What HIBP Returns
Knowing what the API sends back is key. Here's what you get from each endpoint:
| Endpoint | Returns |
|---|
| Query Type | Endpoint | Returns | Auth Required |
|---|---|---|---|
| Single email lookup | /breachedaccount/{email} |
List of breach names and metadata | API key (free for personal) |
| All breaches in database | /breaches |
Full list of indexed breaches with details | None |
| Single breach details | /breach/{name} |
Name, domain, date, data classes, description | None |
| Paste search | /pasteaccount/{email} |
Paste sources where email appeared | API key |
| Password check | /range/{hash-prefix} |
Matching hash suffixes + occurrence counts | None |
| Domain search | Separate API tier | All breached addresses @yourdomain | Paid domain subscription |
When a breach occurs, the records typically include a field called DataClasses, which lists the types of data that were exposed. The actual data is not included, but rather categories such as names, emails, and passwords. These are the kinds of information you might be looking for.
Pricing
HIBP's pricing is as follows:
| Tier | Cost | Use Case |
|---|---|---|
| Free public API | $0 | Personal/non-commercial email lookups, rate-limited to ~1 req/1.5s |
| Domain search | $3.50/mo per domain | Monitor all addresses @yourdomain across all breaches |
| Paid API key | Contact for pricing | Commercial use or higher rate limits |
| Pwned Passwords | Always free | Password hash checks, no rate limit published |
For small organizations on a tight budget, the $3.50/mo domain tier works.
Limitations
HIBP has its limits. It doesn't serve up actual credential data, you get breach names and metadata. Email is the only search key. The free tier has rate limits that can throttle bulk queries. The pastes feature can be a bit spotty, breach coverage is not comprehensive.
Alternatives
HIBP has its limits. Some alternatives are:
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HIBP has its limits. Here are some alternatives:
- Dehashed
- LeakCheck
- Leak-Search
- Pwned
- Snusbase
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- DeHashed — Returns actual breach records, including plaintext passwords and usernames. Supports search by email, username, phone, IP, and name. Starts at $14.99/mo for full record access.
- Intelligence X (IntelX) — Indexes full breach records, pastes, dark web content, and leaked documents. Offers broader coverage than HIBP, including unverified and gray-market datasets.
- LeakCheck — API-first breach lookup with a lower entry price for automation workflows.
- Spycloud — Enterprise breach monitoring with alerting and remediation workflows, priced for security teams.
Verdict
HIBP is your go-to for email breach checks. It's free, fast, and good enough to get you started. The free tier covers individual email checks. For broader domain monitoring, you can opt for a subscription at $3.50 a month. When you need to dig into actual credentials, consider using DeHashed or IntelX.
See Also
Further Reading
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This review reflects testing as of 2026-04-02. OSINT tools change frequently — check the vendor's current documentation for pricing and feature updates. Report an error →