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Personality.fyi vs Zen Quotes

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

APIPersonality.fyiHEALTHY84Zen QuotesHEALTHY75
Uptime · 30d
Uptime · 90d100%92.1%
Uptime · 30d100%94.8%
P50 · ms1047897
P95 · ms34624885
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no authFree — no key
Rate limitUnpublishedRate-limited on the free tier (see zenquotes.io)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Personality.fyi vs Zen Quotes: common questions

Which is more reliable, Personality.fyi or Zen Quotes?

On our scheduled checks, Personality.fyi leads on measured uptime — Personality.fyi at 100% versus Zen Quotes at 92.1% 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, Personality.fyi or Zen Quotes?

Zen Quotes has the lower median latency in our checks — Personality.fyi responds in 1047 ms versus Zen Quotes at 897 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 Personality.fyi and Zen Quotes need an API key?

Neither needs a paid key — Personality.fyi is callable with no signup, and Zen Quotes is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Personality.fyi and Zen Quotes from the browser?

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

Are Personality.fyi and Zen Quotes free for commercial use?

Personality.fyi has unclear commercial terms, and Zen Quotes 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.