Of every provider in this series, Shifter quotes the largest pool: over 205 million residential addresses.

Worth taking seriously, and worth putting in context.

What a Pool That Size Buys You

Depth. Specifically, depth in places most providers cover thinly.

Every provider has plenty of addresses in the United States, Germany and the United Kingdom. The difference between a good pool and an enormous one shows up in the twentieth country down the list, where a smaller provider has a handful of addresses and a large one has thousands.

It also buys you resistance to rate limiting. If a target allows twenty requests per address, a deeper pool means you run out of patience before you run out of addresses.

The caveat that applies to every number like this: the total tells you nothing about the specific place your work depends on. Test the countries you actually need rather than trusting the headline.

Four Products

Residential proxies as the core. ISP proxies for residential credibility at datacenter speed. A Web Scraping API for people who want pages rather than addresses. And a SERP API returning structured search results.

The SERP API deserves a mention. Search results are the hardest common target there is, because they are personalised, localised, rate limited and reshuffled constantly. Doing it yourself means maintaining parsers against a layout that changes without warning. Buying it solved is frequently cheaper than the engineering time.

Entry pricing starts around ten cents a gigabyte with enterprise tiers running into four figures a month, all published.

The Vertical List Is Unusually Specific

Web scraping, SEO monitoring, ad verification, brand protection, lead generation, brand monitoring, AI and machine learning, price intelligence, cybersecurity and OSINT, marketing and adtech, and recruitment and talent.

Two of those stand out.

Cybersecurity and OSINT is a legitimate and rarely named use case. Security research often requires reaching infrastructure from an address that does not announce itself as a research operation, and threat intelligence work means looking at things from the outside.

Recruitment and talent is the one I did not expect. Public professional profiles and job listings vary by region and are aggressively rate limited, so the requirement is real even though nobody talks about it.

Who It Fits

Shifter suits work reaching into countries most providers cover thinly, high volume collection against rate limited targets, teams wanting search results as structured data, and organisations in security, recruitment or brand protection.

Who Might Look Elsewhere

If you need a handful of addresses for personal use, this is far more platform than the job requires.

There is no prominent dedicated mobile carrier tier, so if 4G addresses are specifically what your target demands, a mobile specialist fits better.

Final Verdict

Shifter is one of the largest and most broadly applicable platforms in this market.

Two hundred and five million residential addresses, ISP alongside, scraping and SERP APIs on top, published pricing from ten cents a gigabyte, and a vertical list that reflects a genuinely wide customer base.

Take the free trial and test the specific countries your work depends on. That is the only way any pool size claim becomes meaningful, and our proxy checker makes it quick.