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