Crawlee vs Open Library
Same instrument, two spec sheets — measured, not claimed.
Crawlee vs Open Library: common questions
Which is more reliable, Crawlee or Open Library?
On our scheduled checks, Crawlee leads on measured uptime — Crawlee at 100% versus Open Library at 88.2% 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, Crawlee or Open Library?
Crawlee has the lower median latency in our checks — Crawlee responds in 480 ms versus Open Library at 1629 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 Crawlee and Open Library need an API key?
Neither needs a paid key — Crawlee is callable with no signup, and Open Library is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Crawlee and Open Library from the browser?
Only Open Library is browser-friendly — it returns CORS headers over HTTPS. Crawlee needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Crawlee and Open Library free for commercial use?
Crawlee has unclear commercial terms, and Open Library 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.