Semi-dedicated proxy
A middle tier where an address is shared among a small, fixed number of users rather than one person or an unbounded crowd.
Semi-dedicated is the compromise between the two ends of the sharing question. A dedicated proxy is yours alone; a shared proxy puts you on an address with an undisclosed and often large number of strangers. Semi-dedicated fixes a small cap in between, commonly three users to an address, so the reputation is influenced by a handful of others rather than owned by you or diluted across a crowd.
The economics are the whole pitch. You pay less than for exclusive use because the cost of the address is split, and you take on less risk than open sharing because the number of co-tenants is small and bounded. For work that is reputation-sensitive but not reputation-critical, that trade is often the rational middle, and it is why the tier exists as a distinct product rather than as a discount on dedicated.
The catch is the same one that governs any shared address, only smaller: you still inherit consequences you did not cause. Two other users on your address is two other request patterns accumulating against its reputation, and if one of them behaves badly the block lands on you as readily as on them. Fewer co-tenants means fewer chances of that, not none, and the failure mode when it comes is the same silent quality loss a fully shared address produces.
The number that matters, and the one to actually ask for, is the cap. Semi-dedicated is only meaningful if the provider enforces a low, stated ceiling on how many users share an address; a vague semi-dedicated with no number is just shared proxy with better marketing. Three is a common honest figure. If nobody will state one, treat it as fully shared and price it accordingly.
Frequently asked questions
How many people share a semi-dedicated proxy?
A small, capped number, commonly three, which is the whole distinction from a fully shared proxy where the count is undisclosed and often large. The cap is the product, so ask for the exact figure. A provider selling semi-dedicated who will not state how many users share an address is really selling a shared proxy under a nicer name.
Is a semi-dedicated proxy worth it over shared?
For reputation-sensitive work that does not need exclusive use, usually yes. Capping co-tenants at a small number sharply cuts the chance of inheriting a stranger's block compared with open sharing, at a price well below dedicated. For undemanding tasks where a block just costs a retry, plain shared is still the cheaper rational choice.
Can I still get blocked on a semi-dedicated proxy?
Yes. Any co-tenant is a reputation you do not fully control, so a badly behaved neighbour can still get the address flagged, and the failure looks the same: quiet quality loss rather than an outage. Fewer neighbours lowers the odds; it does not remove them. Only a dedicated address makes the reputation solely yours.
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