A Have I Been Pwned API alternative for developers.
Passwordify uses the same privacy-preserving k-anonymity breach model HIBP pioneered — then adds zxcvbn strength scoring, a NIST 800-63B verdict, and secure generation behind one self-serve key. Honest take: if you only need a raw breach lookup, HIBP’s free Pwned Passwords endpoint is great. If you want the whole password decision in one API, read on.
How they compare.
| Capability | Passwordify | HIBP | Enzoic |
|---|---|---|---|
| k-anonymity breach check | |||
| zxcvbn strength scoring | |||
| NIST 800-63B pass/fail verdict | |||
| Secure password generation | |||
| Self-serve signup (no sales call) | Free tier only | ||
| Free tier | 1,000 req/mo | Pwned Passwords (unlimited) | 2,000 calls |
| Entry paid price | $1.50/mo | $4.39/mo | Contact sales |
Competitor details shown for comparison and accurate at time of writing; check each provider’s site for current pricing and capabilities.
Common questions.
Is Passwordify a drop-in replacement for Have I Been Pwned?
For breach screening, it uses the same k-anonymity model HIBP pioneered — you send a short SHA-1 hash prefix, never the password. Where it goes further is bundling zxcvbn strength scoring and a NIST 800-63B verdict into the same API, so you get a full password decision from one provider.
Isn’t the HIBP Pwned Passwords endpoint already free?
Yes — and it’s excellent. If all you need is a raw breach lookup, use it directly. Passwordify is for teams that also want strength scoring, a policy verdict, generation, usage dashboards and support behind a single self-serve key.
How does pricing compare?
Passwordify Pro is $2/mo ($1.50/mo billed annually) for 100,000 requests. HIBP’s paid breach-search API starts around $4.39/mo and scales into the thousands; Enzoic and SpyCloud are quote-based enterprise sales. Passwordify is built for indie devs and small teams.