Proxy servers are grouped by six criteria: traffic flow, IP source, anonymity level, protocol, rotation, and cost. The choice that matters most for web scraping and privacy is the IP source, with residential, datacenter, mobile, and ISP proxies differing in speed and price.
Types by IP source
The origin of the IP address determines how easily a website can detect and block the proxy.
Residential proxies
Residential proxies use IP addresses that ISPs assign to real households. Because the traffic appears to be a genuine home connection, websites rarely flag it, making these proxies effective against strict anti-bot systems.
They are more expensive than datacenter proxies because they rely on consumer connections and a limited supply of IP addresses.
Datacenter proxies
Datacenter proxies come from cloud hosting providers such as AWS or Google Cloud, not ISPs. They are fast, cheap, and scalable. Their drawback is detection: websites maintain lists of known datacenter IP ranges and readily block them.
Mobile proxies
Mobile proxies route traffic through IPs that mobile carriers assign to cellular devices. Carriers use CGNAT to share a single public IP address across many devices, so blocking a mobile IP address risks blocking many legitimate users.
ISP Proxies (Static Residential)
ISP proxies are registered with consumer ISPs but hosted on datacenter servers. They combine datacenter speed with residential trust, which suits tasks that need both, such as managing multiple accounts.
Types by exclusivity and cost
- Public (free) proxies: open to anyone, making them unsuitable for sensitive tasks.
- Shared proxies: used by several people at once. They are cheaper but slower, and one user’s misuse can get the IP banned for everyone.
- Dedicated (private) proxies: assigned to one user, giving full control over IP reputation and the most consistent speed.
Types by rotation
Rotation refers to how often the proxy’s IP changes.
- Static proxies keep the same IP across sessions, which suits logins, persistent connections, and account management. The risk is that a single blacklisted IP stays unusable for that site.
- Rotating proxies change the IP per request or per session interval. Per-request rotation spreads traffic across multiple IPs for large-scale scraping; sticky-session rotation keeps one IP for a set period when a task requires session continuity.
Types by IP version
- IPv4 proxies use the original 32-bit standard. The address supply is limited, so they cost more, but they have the widest site compatibility.
- IPv6 proxies use the newer standard with a far larger address space, which lowers cost and blacklisting risk. Adoption is incomplete, so some sites do not accept IPv6 traffic.
Types by traffic flow
This is the most fundamental split: where the proxy sits in the connection.
- Forward proxies sit on the client side and forward outbound requests to external servers. They are used for privacy, content filtering, and bypassing geo-restrictions.
- Reverse proxies sit in front of web servers and manage inbound traffic before it reaches the backend. They handle load balancing, caching, and shielding origin servers from direct access.
Add as preferred sourceTypes by anonymity level
Anonymity depends on which headers the proxy passes to the destination server.
- Transparent proxies do not hide the client’s IP and identify themselves as a proxy. Schools and offices use them for content filtering and caching.
- Anonymous proxies hide the real IP but still signal that a proxy is in use, so sites with strong anti-bot measures can detect them.
- Elite (high-anonymity) proxies remove all proxy-related headers, so the request appears to come from a regular user. These are the most effective for scraping protected sites.
Types by protocol
Proxies support different protocols, which determine the traffic they can carry.
- DNS proxies intercept domain name lookups to bypass geo-restrictions and speed up resolution.
- HTTP/HTTPS proxies handle web traffic and can inspect and filter requests, making them well-suited for scraping and ad verification.
- SOCKS4 is an older protocol that supports TCP only and lacks authentication.
- SOCKS5 supports both TCP and UDP, adds authentication, and handles gaming, streaming, and peer-to-peer traffic.
FAQs
Use a lookup tool such as ipinfo.io or whoer.net while connected to the proxy. It shows whether the IP is classified as datacenter or residential and whether your real location leaks.
SOCKS4 supports TCP only and has no authentication. SOCKS5 supports TCP and UDP, adds authentication, and handles streaming and voice traffic.
Cite this research
Pick the format that matches where you're publishing. Pasting the link version into your CMS preserves the backlink.
@misc{karatas2026,
author = {Karatas, Gulbahar},
title = {{Proxy Server Types: Explained & Compared}},
year = {2026},
month = jun,
howpublished = {\url{https://aimultiple.com/proxy-server-types}},
note = {AIMultiple. Retrieved June 4, 2026}
}
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