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IPinfo vs serpstack

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

APIIPinfoHEALTHY91serpstackHEALTHY93
Uptime · 30d
Uptime · 90d94.1%99.02%
Uptime · 30d90.0%98.3%
P50 · ms200492
P95 · ms4731442
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierKeyless /json works with limits; free token recommended (IPinfo Lite offers higher/unlimited access with a token)Free tier — key may be required
Rate limitKeyless/unauthenticated access is rate-limited; numeric caps not stated on the developers pageUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

IPinfo vs serpstack: common questions

Which is more reliable, IPinfo or serpstack?

On our scheduled checks, serpstack leads on measured uptime — IPinfo at 94.1% versus serpstack at 99.02% 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, IPinfo or serpstack?

IPinfo has the lower median latency in our checks — IPinfo responds in 200 ms versus serpstack at 492 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 IPinfo and serpstack need an API key?

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

Can I call IPinfo and serpstack from the browser?

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

Are IPinfo and serpstack free for commercial use?

IPinfo has unclear commercial terms, and serpstack 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.