ISP vs datacenter proxies: which job each one fits

Originally published on proxymint.

ISP vs datacenter proxies: both run on servers and hold one IP for the term. Which job each one fits, how speed compares, and how each is billed.

TL;DR

• Same hardware, different registered network. ISP proxies and datacenter proxies both typically run on servers and both hold one fixed address, assigned to your order for the whole billing term. A datacenter IP is registered to a hosting company, an ISP proxy's IP to an internet service provider.
• Datacenter fits machine-facing work. APIs, monitoring, lenient public sites, internal tools and load tests expect servers, and a datacenter port is built for them.
• ISP fits account work. Sign-ins and accounts the team owns or runs for clients need one steady address held for weeks, and an ISP-registered address fits that job.
• Speed does not decide it. Neither type routes through a home connection, so latency depends mostly on the path between exit, target and client. Measure it on the real target.
• Both bill per address, per month. Datacenter per port, ISP per IP, neither metered per GB.

Key takeaways

• Decide by the job. Account and sign-in work on accounts you own goes on ISP; machine-facing work goes on datacenter.
• Use datacenter where the other side expects a server. APIs, monitoring, lenient sites, your own tools and load tests are its job.
• Use ISP where one address has to hold an account. Seller dashboards, ad accounts and social accounts the team runs keep one address for the term.
• Split mixed fleets. Put only the addresses that sign in on ISP, keep the rest on datacenter ports, and never let an account log in from a datacenter port.
• Treat a challenge as an answer. A target that blocks the job is a stop signal, not a reason to change tier.

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