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Marketstack vs Unirate

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

APIMarketstackHEALTHY93UnirateREACHABLE100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms470324
P95 · ms4068611
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Marketstack vs Unirate: common questions

Which is more reliable, Marketstack or Unirate?

Both are neck-and-neck — Marketstack and Unirate each measure 100% 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, Marketstack or Unirate?

Unirate has the lower median latency in our checks — Marketstack responds in 470 ms versus Unirate at 324 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 Marketstack and Unirate need an API key?

Both ask you to authenticate — Marketstack uses an API key and Unirate 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 Marketstack and Unirate from the browser?

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

Are Marketstack and Unirate free for commercial use?

Marketstack has unclear commercial terms, and Unirate 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.