Dog CEO vs Cat Facts
Same instrument, two spec sheets — measured, not claimed.
Dog CEO vs Cat Facts: common questions
Which is more reliable, Dog CEO or Cat Facts?
On our scheduled checks, Cat Facts leads on measured uptime — Dog CEO at —% versus Cat Facts 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 Dog CEO and Cat Facts need an API key?
Neither needs a paid key — Dog CEO is callable with no signup, and Cat Facts is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Dog CEO and Cat Facts from the browser?
Yes — both Dog CEO and Cat Facts 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 Dog CEO and Cat Facts free for commercial use?
Dog CEO allows commercial use on its free tier, and Cat Facts 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.