National Vulnerability Database vs Portscan
Same instrument, two spec sheets — measured, not claimed.
National Vulnerability Database vs Portscan: common questions
Which is more reliable, National Vulnerability Database or Portscan?
On our scheduled checks, Portscan leads on measured uptime — National Vulnerability Database at 91.6% versus Portscan at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, National Vulnerability Database or Portscan?
Portscan has the lower median latency in our checks — National Vulnerability Database responds in 263 ms versus Portscan at 225 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do National Vulnerability Database and Portscan need an API key?
Neither needs a paid key — National Vulnerability Database is callable with no signup, and Portscan is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call National Vulnerability Database and Portscan from the browser?
Yes — both National Vulnerability Database and Portscan send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are National Vulnerability Database and Portscan free for commercial use?
National Vulnerability Database allows commercial use on its free tier, and Portscan has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.