Gutendex vs Wolne Lektury
Same instrument, two spec sheets — measured, not claimed.
Gutendex vs Wolne Lektury: common questions
Which is more reliable, Gutendex or Wolne Lektury?
On our scheduled checks, Wolne Lektury leads on measured uptime — Gutendex at 8.8% versus Wolne Lektury at 75.5% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Gutendex or Wolne Lektury?
Wolne Lektury has the lower median latency in our checks — Gutendex responds in 3229 ms versus Wolne Lektury at 1145 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 Gutendex and Wolne Lektury need an API key?
Neither needs a paid key — Gutendex is callable with no signup, and Wolne Lektury is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Gutendex and Wolne Lektury from the browser?
Yes — both Gutendex and Wolne Lektury 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 Wolne Lektury free for commercial use?
Gutendex has unclear commercial terms, and Wolne Lektury 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.