Affirmations.dev vs Personality.fyi
Same instrument, two spec sheets — measured, not claimed.
Affirmations.dev vs Personality.fyi: common questions
Which is more reliable, Affirmations.dev or Personality.fyi?
Both are neck-and-neck — Affirmations.dev and Personality.fyi 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, Affirmations.dev or Personality.fyi?
Affirmations.dev has the lower median latency in our checks — Affirmations.dev responds in 590 ms versus Personality.fyi at 1200 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 Affirmations.dev and Personality.fyi need an API key?
Neither needs a paid key — Affirmations.dev is callable with no signup, and Personality.fyi is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Affirmations.dev and Personality.fyi from the browser?
Only Personality.fyi is browser-friendly — it returns CORS headers over HTTPS. Affirmations.dev needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Affirmations.dev and Personality.fyi free for commercial use?
Affirmations.dev has unclear commercial terms, and Personality.fyi 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.