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Image-Charts vs serpstack

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

APIImage-ChartsHEALTHY99serpstackHEALTHY93
Uptime · 30d
Uptime · 90d99.02%99.02%
Uptime · 30d98.3%98.3%
P50 · ms80492
P95 · ms4991442
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Image-Charts vs serpstack: common questions

Which is more reliable, Image-Charts or serpstack?

Both are neck-and-neck — Image-Charts and serpstack 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, Image-Charts or serpstack?

Image-Charts has the lower median latency in our checks — Image-Charts responds in 80 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 Image-Charts and serpstack need an API key?

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

Can I call Image-Charts and serpstack from the browser?

Neither sends browser-friendly CORS headers reliably, so call Image-Charts and serpstack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Image-Charts and serpstack free for commercial use?

Image-Charts 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.