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eNanoMapper database vs Userstack

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

APIeNanoMapper databaseHEALTHY79UserstackHEALTHY93
Uptime · 30d
Uptime · 90d99.02%99.02%
Uptime · 30d100%98.3%
P50 · ms1601443
P95 · ms33103029
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

eNanoMapper database vs Userstack: common questions

Which is more reliable, eNanoMapper database or Userstack?

Both are neck-and-neck — eNanoMapper database and Userstack each measure 99.02% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, eNanoMapper database or Userstack?

Userstack has the lower median latency in our checks — eNanoMapper database responds in 1601 ms versus Userstack at 443 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 eNanoMapper database and Userstack need an API key?

eNanoMapper database needs no key, while Userstack requires a free API key. If you want to start calling without signup, reach for eNanoMapper database first.

Can I call eNanoMapper database and Userstack from the browser?

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

Are eNanoMapper database and Userstack free for commercial use?

eNanoMapper database has unclear commercial terms, and Userstack 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.