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Diffbot API vs Stock Sentiment API

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

APIDiffbot APINEW—Stock Sentiment APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Diffbot API vs Stock Sentiment API: common questions

Which is more reliable, Diffbot API or Stock Sentiment API?

On our scheduled checks, Stock Sentiment API leads on measured uptime — Diffbot API at —% versus Stock Sentiment API at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Diffbot API and Stock Sentiment API need an API key?

Both ask you to authenticate — Diffbot API uses an API key and Stock Sentiment 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 Diffbot API and Stock Sentiment API from the browser?

Yes — both Diffbot API and Stock Sentiment API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Diffbot API and Stock Sentiment API free for commercial use?

Diffbot API has unclear commercial terms, and Stock Sentiment 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.