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Marketstack vs Plaid API

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

APIMarketstackHEALTHY93Plaid APIHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms470359
P95 · ms4068874
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 Plaid API: common questions

Which is more reliable, Marketstack or Plaid API?

Both are neck-and-neck — Marketstack and Plaid API 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 Plaid API?

Plaid API has the lower median latency in our checks — Marketstack responds in 470 ms versus Plaid API at 359 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 Plaid API need an API key?

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

Only Plaid API 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 Plaid API free for commercial use?

Marketstack has unclear commercial terms, and Plaid API 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.