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