Authentication vs FilterLists
Same instrument, two spec sheets — measured, not claimed.
Authentication vs FilterLists: common questions
Which is more reliable, Authentication or FilterLists?
On our scheduled checks, Authentication leads on measured uptime — Authentication at 100% versus FilterLists at 98.0% 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, Authentication or FilterLists?
FilterLists has the lower median latency in our checks — Authentication responds in 720 ms versus FilterLists at 357 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 Authentication and FilterLists need an API key?
Neither needs a paid key — Authentication is callable with no signup, and FilterLists is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Authentication and FilterLists from the browser?
Neither sends browser-friendly CORS headers reliably, so call Authentication and FilterLists from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are Authentication and FilterLists free for commercial use?
Authentication has unclear commercial terms, and FilterLists 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.