Pay-per-GB is a pricing model where customers are charged based on the exact amount of data, measured in gigabytes, they use through the proxy. There is no fixed monthly data cap included in the base price.
The provider tracks the total data transferred through a user account, typically at a set price per gigabyte. Customers usually buy a starting balance of gigabytes or pay for usage at the end of a billing period, depending on the provider system. This model scales naturally with actual usage, so light users pay less and heavy users pay more without needing to guess and buy a fixed plan size in advance. Some providers offer volume discounts, lowering the price per gigabyte as usage grows.
This is largely a plan and configuration choice, not a technical limitation.
USER-pay-per-gb-session-task01Everything lives in the username -- add "pay-per-gb" to any proxy credential to apply pay-per-gb 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 small research project using only 2 GB per month pays much less under a pay-per-GB plan than it would on a large fixed-bandwidth subscription.
This pricing model suits projects with unpredictable or variable data needs, avoiding the waste of paying for unused bandwidth. Buyers should compare per-GB rates across providers, since prices can vary significantly by proxy type and location.
Pay-Per-GB 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.
It depends entirely on usage patterns. Light or unpredictable usage often costs less on a pay-per-GB plan, since there is no waste from an unused fixed cap. Heavy, consistent usage, on the other hand, can end up cheaper on a fixed high-volume plan, especially once volume discounts apply.
This depends entirely on the specific provider and plan terms. It is worth checking carefully whether purchased gigabytes expire at the end of a billing cycle or carry over into the next one, since losing unused, already-paid-for data can add real hidden cost to a project over time.
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