Personality.fyi vs Riddles API
Same instrument, two spec sheets — measured, not claimed.
Personality.fyi vs Riddles API: common questions
Which is more reliable, Personality.fyi or Riddles API?
Both are neck-and-neck — Personality.fyi and Riddles 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, Personality.fyi or Riddles API?
Riddles API has the lower median latency in our checks — Personality.fyi responds in 1200 ms versus Riddles API at 321 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 Riddles API need an API key?
Neither needs a paid key — Personality.fyi is callable with no signup, and Riddles API is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Personality.fyi and Riddles API from the browser?
Yes — both Personality.fyi and Riddles 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 Personality.fyi and Riddles API free for commercial use?
Personality.fyi has unclear commercial terms, and Riddles 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.