TL;DR: They're complementary rather than competing — running a free HIBP check is a smart first step, and a fuller scan is useful if you want a more complete picture and guided next actions rather than just a breach list.
Have I Been Pwned (HIBP) and Scan My Shadow both help you find out if your information has been exposed, but they check different things.
What to Look For
Have I Been Pwned is a free, widely trusted tool that tells you whether your email or phone number appears in a known data breach — it's a great first check and has been a go-to resource in the security community for years.
Key Differences
Scan My Shadow goes a step further by cross-referencing your phone number and email against a broader set of exposure sources beyond breach databases, and packages the findings into a full report with clear next steps rather than just a yes/no breach list.
The Bottom Line
They're complementary rather than competing — running a free HIBP check is a smart first step, and a fuller scan is useful if you want a more complete picture and guided next actions rather than just a breach list.
If this looks similar to something else you've seen, it's worth reading Identity Guard vs Aura: Feature Comparison.
This pattern shows up elsewhere too — see Identity Theft Insurance: Is It Worth Buying?.
Frequently Asked Questions
What’s the short answer?
They're complementary rather than competing — running a free HIBP check is a smart first step, and a fuller scan is useful if you want a more complete picture and guided next actions rather than just a breach list.
What should I actually look for?
Have I Been Pwned (HIBP) and Scan My Shadow both help you find out if your information has been exposed, but they check different things.