How to Choose the Best Proxies for Web Scraping

Most scraping guides start with rotation. That is the wrong end. Rotation is a knob you turn after you know what the target does to unwanted traffic, and targets differ enormously — from no defence at all to full behavioural bot management. This guide works in that order: identify the defence, pick the type, size the pool, then configure sessions.

First: find out what you are actually up against

Before buying anything, send one request from an ordinary server IP and one through a residential exit, and compare. That single test tells you more than any vendor comparison, because it distinguishes the four cases that need four different answers.

The last row is the one that costs people months. A site that serves you a stripped-down page instead of blocking you produces a dataset that looks complete and is wrong. More on catching that below.

Which proxy type should you use?

• Protected sites — e-commerce, search, social, travel: rotating residential for the highest success rates.
• High-volume, lightly protected sites: datacenter for the lowest cost and fastest speed.
• Persistent sessions or logins: ISP proxies for a stable, trusted IP that outlives a sticky session.

If you want the reasoning behind each of those in depth, the full type comparison covers the trade-offs and a worked cost model.

How many IPs do you actually need?

The useful formula is not about your total request volume. It is about the target's per-IP rate limit and how long you are willing to take.

That number is why rotating residential is priced by bandwidth rather than by IP. You are not buying 200 addresses; you are buying access to a pool deep enough that 200 concurrent exits is unremarkable. With static IPs you would have to rent all 200. The counting exercise is worked through properly in how many proxies do I need.

How proxy rotation works

Rotation assigns a fresh IP automatically — either on every request or after a set interval — so no single IP sends enough traffic to trip a rate limit. For workflows that need session continuity, sticky sessions keep the same IP for a defined window.

Rotate by page dependency, not by clock

The rule that prevents most rotation bugs: if a sequence of requests shares state — a cookie, a CSRF token, a cart, a pagination cursor tied to a session — it must run on one exit from start to finish. Rotate between sequences, never inside one.

1. 1Independent page fetches — rotate freely, one IP per request.
2. 2Paginated listings with a session cursor — one sticky exit for the whole pagination run.
3. 3Search then detail pages — sticky if the detail URL carries a session token, rotating if it does not.
4. 4Anything behind a login — sticky, and ideally a static ISP IP rather than a session.

Geo-targeting for accurate data

Prices, search results, inventory and even product availability vary by location. Target by country, city or ASN to collect data exactly as a local user would see it. This is not a nice-to-have for price monitoring and local SEO — data collected from the wrong country is not noisy, it is simply about a different market.

Two practical points. First, keep the geography consistent within a session: an IP that moves from Berlin to São Paulo between two requests is a stronger signal than either address on its own. Second, city-level targeting matters more than people expect on marketplaces, where delivery estimates and availability are postcode-driven. Our location coverage lists what is available per country.

Measure response quality, not just status codes

This is the discipline that separates a scraper that works from a scraper you can trust. A defended site rarely returns a clean 403. It returns a 200 with a challenge page, or a 200 with half the fields missing, or cached data from an hour ago. Your pipeline counts those as successes.

• Assert on content, not on status. Every parser should fail loudly when a field it expects is absent.
• Track response size distribution. A sudden cluster of unusually small responses is a block in disguise.
• Sample and diff. Re-fetch a handful of known URLs from a clean exit daily and compare against what the crawler got.
• Separate failure categories. A timeout, a soft block, a challenge page and a genuine 404 need different retry logic.
• Alert on success-rate drift, not just on errors. A drop from 98% to 91% is the early warning.

Run the same measurements before you commit to a provider, not only after. The proxy quality checklist covers what to test during a trial, and Google SERP collection is worth reading separately because it is strict enough to invalidate a pool that works everywhere else.

If the exit policy is wrong, the data quality is wrong. Proxy behaviour belongs in the same monitoring dashboard as your parser.

Practical tips to avoid bans

1. 1Rotate IPs and spread requests across a large pool rather than hammering a few.
2. 2Add realistic delays and randomise them — a perfect two-second interval is itself a signature.
3. 3Send a coherent header set. A modern user-agent paired with headers no modern browser sends is worse than no rotation at all.
4. 4Respect robots.txt and keep volume proportionate to the site's size.
5. 5Use sticky sessions only where continuity is required, and release them when the sequence ends.
6. 6Retry with exponential backoff, and treat a challenge page as a signal to slow down rather than to retry harder.

There is a dedicated deep-dive on the detection side in how to avoid getting blocked when web scraping, including TLS fingerprinting and headless-browser tells.

Keeping the bandwidth bill down

Per-GB billing rewards a few unglamorous habits, and together they routinely cut spend by more than half:

• Block images, fonts, media and analytics in your fetcher. On a typical product page these are most of the bytes and none of the data.
• Prefer the site's JSON endpoints over rendered HTML where they exist — often a tenth of the weight.
• Send `Accept-Encoding: gzip` and make sure your client actually decompresses rather than requesting plain text.
• Cache aggressively. Re-fetching a page you already have is pure cost.
• Run headless browsers only where needed. A full page load can be twenty times the transfer of an HTTP request.

Wiring it into your stack

Every mainstream client supports proxies natively. We keep setup guides with working configuration for Scrapy, Python requests, httpx, Playwright, Puppeteer, Selenium and cURL. If you are targeting a specific site, the target pages list what works per platform.