An uptime guarantee is a stated promise from a provider about how often its service will be available and working, usually expressed as a percentage like 99.9 percent. It sets a clear expectation for reliability that customers can measure against.
The provider tracks how long its systems stay online and responsive over a set period, usually a month. This tracked value is compared against the promised percentage in the guarantee. A small-looking gap in the percentage can add up to real downtime, since even 99.9 percent uptime still allows for roughly 43 minutes of downtime per month. Providers that miss their guarantee often owe customers credits as outlined in their service agreement.
This is largely a plan and configuration choice, not a technical limitation.
USER-uptime-guarantee-session-task01Everything lives in the username -- add "uptime-guarantee" to any proxy credential to apply uptime guarantee to a single task. Swap "task01" for a new label to spin up an independent, isolated identity.
KnoxProxy sticky sessions persist up to 30 minutes on residential (60 on mobile), and the window refreshes with activity.
Each session or connection label gets its own exit, so parallel identities never collide.
This costs nothing beyond bandwidth -- successful responses are billed, not the session or connection itself.
Run as many parallel sessions or connections as the job needs -- concurrency is not capped on any plan.
A hosting provider offering a 99.95 percent uptime guarantee allows for roughly 22 minutes of downtime per month before the promise counts as broken.
A clear uptime guarantee helps buyers compare the real reliability of different providers instead of relying on marketing claims. Business-critical tasks like scraping or automation need providers with a strong, proven uptime record.
Uptime Guarantee is a plan-level or configuration-level concept that determines how proxy resources get allocated across your jobs. It is a billing and management concern, not a protocol detail.
Anything at 99.9 percent or higher is generally considered strong for proxy and hosting services, since even that level still allows roughly 43 minutes of downtime per month. A guarantee of 99.95 percent is even stronger, cutting the allowed monthly downtime down to only about 22 minutes.
Many providers publish a public status page or a historical uptime report showing performance over recent months, which is worth checking before signing a contract. Independent third-party monitoring tools can also track the actual availability of a service over time, giving a more objective picture than marketing claims alone.
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