Every proxy question eventually reduces to one decision: should the request look like it comes from a home connection, or does it not matter? Residential and datacenter IPs answer that differently, and the right answer depends on the site you are talking to, not on which network is “better”.
What a residential IP is
A residential IP belongs to a consumer internet provider and is assigned to a household connection. To the site receiving the request, it is indistinguishable from a person at home. That is exactly what you want when the target scrutinises visitors: social platforms, retail sites, search engines and anything with aggressive bot detection.
What a datacenter IP is
A datacenter IP belongs to a hosting provider. It is fast, stable and inexpensive, and it is published as such in every IP reputation database. Sites that care about consumer traffic can see that and may challenge or rate-limit it. Sites that don’t care, which is most APIs and most of the open web, treat it like any other client.
A simple rule
- If the target is built for consumers and defends itself, start residential.
- If the target is an API, your own infrastructure or a site that serves machines happily, start datacenter.
- If you are not sure, run ten requests through each and count the challenges. The answer is usually obvious within an hour.
Cost changes the question
At $1 per residential IP and $0.05 per datacenter IP, twenty datacenter IPs cost the same as one residential IP. For workloads where a block costs you nothing but a retry, more cheap IPs often beat fewer expensive ones. For workloads where a block means a lost account or a poisoned dataset, residential pays for itself quickly.
You can mix both on one account and move IPs between locations as targets change. Start small, measure, then buy the quantity the data tells you to.