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MalwareBazaar vs VulDB

Same instrument, two spec sheets — measured, not claimed.

APIMalwareBazaarNEW—VulDBNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

MalwareBazaar vs VulDB: common questions

Which is more reliable, MalwareBazaar or VulDB?

On our scheduled checks, VulDB leads on measured uptime — MalwareBazaar at —% versus VulDB at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do MalwareBazaar and VulDB need an API key?

Both ask you to authenticate — MalwareBazaar uses an API key and VulDB uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call MalwareBazaar and VulDB from the browser?

Only VulDB is browser-friendly — it returns CORS headers over HTTPS. MalwareBazaar needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are MalwareBazaar and VulDB free for commercial use?

MalwareBazaar has unclear commercial terms, and VulDB 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.