How residential proxies work
Residential proxy networks are built from real devices on real home connections — typically through opt-in SDKs embedded in free apps (the user agrees to share bandwidth in exchange for the app being free) or through paid participation programs. Your scraper sends its request to the proxy provider's gateway; the gateway selects an available residential peer matching your geo and rotation rules; the peer forwards the request to the target site over its home connection. The target site sees the home IP, with no datacenter ASN, no Cloudflare-known proxy range, no easy fingerprint to flag. Latency is higher (an extra hop through a possibly-slow consumer line), but the trust score is dramatically higher too.
When residential proxies are the right tool
Use residential proxies when the target site blocks or rate-limits datacenter IPs, when you need country- or city-level geo targeting, or when you need to test that a real user's experience matches what your scraper sees. E-commerce, travel, social media, sneaker drops, ad verification, and SEO research are the dominant categories. Don't use them when datacenter IPs work — they're 10–50x more expensive per GB, and bandwidth is the meter, not requests. Heavy pages with lots of images can cost meaningfully more than text-only API calls.
Ethical and legal concerns
The supply side of residential proxy networks has been controversial. Some networks built their pools through SDKs bundled in apps where users didn't meaningfully understand they were sharing their connection — recent FTC actions and platform policy changes have pushed the industry toward clearer opt-in. Reputable providers now publish their peer recruitment process and let users opt out. As a buyer, prefer providers that document peer consent and have a track record. As a user of the destination, remember that the IP doing the scraping belongs to a real person whose connection is in the middle — keep request rates polite.