Shared, dedicated and premium proxies compared
Static lines come in tiers. The tiers differ in how many customers use an address, what traffic is included, and how much control you have over the address.
Shared
A shared address is used by a small, stated number of customers at once. It is the cheapest tier. The risk is that someone else's behaviour affects the address's reputation with a target.
Dedicated
A dedicated address is used by you alone for the term. Its reputation is the product of your traffic. That is what you want for account-bound work, where a neighbour's behaviour would be your problem.
Premium
Premium is dedicated with extra guarantees on the address itself: it has not been used before, and rotation is manual, on your say. Choose it where the history of an address matters to the target.
Which to pick
Shared for throwaway checks and low-stakes polling. Dedicated for anything tied to an account or a session. Premium when an address with no history is part of the requirement. The plans table on the pricing page shows the current price of each.
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Put it into practice
Create an account and place a small first order.