PIA S5 Proxy Review:
350M IPs at Rock-Bottom Prices — But Is It Safe?

Every PIA S5 Proxy review you find leads with the same jaw-dropping numbers: $0.24 per IP with no expiry, 350 million residential IPs, no KYC, crypto-only checkout. The prices look too good. Before you load up your wallet, there’s context you need — and it’s more serious than a typical “pros and cons” summary.

In October 2025, KrebsOnSecurity reported that security researchers at Synthient and Spur had identified PIA S5 Proxy as one of multiple brands operating under the same corporate umbrella — known as HK Network / IPidea — that was tied to the original 911S5 Proxy network. The owner of 911S5 was arrested by the US Department of Justice in May 2024 and sanctioned by the US Treasury for allegedly running a botnet used to steal billions of dollars from financial institutions and federal lending programs.

PIA S5 Proxy is a rebrand of 922S5 Proxy (922Proxy), itself described by researchers as a “not-so-subtle nod” to 911S5. The original domains (pia-s5.com, 922s5.com) went dark. The service re-launched in May 2026 on pias5proxy.net with new pricing, a promo code (OPEN30), and an apology for the downtime.

We’ve reviewed the new pricing, tested the product claims, and laid out the legitimacy findings so you can make an informed call — not just chase the cheapest per-IP rate on the market.

What Is PIA S5 Proxy?

PIA S5 Proxy (currently operating at pias5proxy.net and PIA5Proxy.com) is a residential proxy service specializing in SOCKS5 protocol. It claims a pool of 350 million+ residential IPs across 200+ countries and 700+ cities, priced on a pay-per-IP basis where purchased IPs never expire.

The platform offers four product lines:

• SOCKS5 Pay-Per-IP — buy a block of IPs once, use them indefinitely with no monthly fee
• Residential Pay-Per-GB — rotating residential proxies billed by bandwidth consumed
• Static ISP Proxies — fixed ISP-assigned IPs billed per IP per month, 30+ countries
• Bundle Plans — mixed packages combining all three types at up to 38% savings

Company Background & Rebranding History

The service has gone through several brand iterations. The original PIA S5 / 922S5 Proxy operated on pia-s5.com and 922s5.com until those domains went dark. Researchers at Synthient and Spur, covered by KrebsOnSecurity in October 2025, identified the service as part of a network of proxy brands — including 922Proxy, ABCProxy, LunaProxy, PyProxy, 360Proxy, IP2World, and Cherry Proxy — all operating under an umbrella called HK Network, linked to a China-based company called IPidea.

As of May 2026, PIA S5 Proxy re-launched on pias5proxy.net after a “February–May 2026 rebuild.” The site acknowledges returning customers cannot immediately restore old accounts — full restoration is expected within 4–6 months. There is no registered company name, physical address, or jurisdiction published anywhere on the site.

Who Is PIA S5 Proxy For?

✓ Ideal Users

PIA S5 Proxy draws a specific type of buyer. If you fit one of these profiles, the service may make sense:

• Antidetect browser operators — Running AdsPower, Multilogin, Dolphin Anty, GoLogin, or similar tools for multi-account management. PIA S5’s SOCKS5-first architecture and per-IP-no-expiry model fits account warmers who need stable, long-lived IPs at low cost.
• Social media automation users — Managing Instagram, TikTok, Facebook, or X accounts at scale. The unlimited concurrent sessions and 700+ city targeting make it viable for multi-account social workflows.
• Sneaker cop and reselling teams — Nike SNKRS, Adidas Confirmed, Supreme, and StockX drops. Low per-IP cost and crypto checkout are common requirements in this community.
• Crypto and Web3 operators — Airdrop farming, wallet management, and Web3 automation where crypto-native tooling and no-KYC access are expected.
• Budget web scrapers — Teams doing price monitoring, SERP tracking, or e-commerce intelligence on a tight budget who need cheap residential proxies but can’t justify Bright Data or Oxylabs pricing.

✗ Not Ideal For

PIA S5 Proxy Features: SOCKS5, Residential & Static ISP

PIA S5 Proxy bundles a competitive feature set into its three proxy product lines. Here’s what each delivers:

Core Protocol Support

• SOCKS5, HTTP, and HTTPS on all product types — most competitors offer HTTP/HTTPS only; native SOCKS5 is a meaningful differentiator for antidetect and automation workflows
• IP whitelist authentication and username/password authentication — both supported on SOCKS5 plans (whitelist on Starter; both methods on Popular and above)
• Rotating sessions (per-request) and sticky sessions up to 30 minutes
• Unlimited concurrent sessions — no artificial cap on simultaneous connections

Targeting Options

• Country targeting — 200+ countries on SOCKS5 and residential; 30+ countries on static ISP
• City targeting — 700+ cities available on Plus and above
• Postcode (ZIP) targeting — Pro and above
• ISP-level targeting — Pro and above; specify Comcast, AT&T, Verizon, BT, Deutsche Telekom, etc.

Account & API Management

• Sub-accounts — Starter: none; Basic: 5; Popular: 10; Plus: 20; Pro and above: unlimited
• Full REST API access on all paid plans
• Dashboard with credential generation, IP export, and usage reporting
• IP balance never expires on SOCKS5 Pay-Per-IP plans — buy once, use when needed

Compatible Platforms

PIA S5 lists 60+ integration partners across antidetect browsers (AdsPower, Multilogin, Dolphin Anty, GoLogin, Octo Browser, Kameleo, MoreLogin), automation tools (Selenium, Playwright, Puppeteer, Scrapy, Apify), and account management software (Jarvee, PhantomBuster, ZennoPoster, BAS). The PIA S5 Client app is also available for desktop use.

Static ISP Proxies

The Static ISP product offers fixed, ISP-assigned IPs that don’t rotate — same IP for the entire billing period. This is useful for account warming, brand monitoring, or any task requiring a stable identity over weeks. Unlimited bandwidth is included on most ISP plans.

How PIA S5 Proxy Works (Step-by-Step)

Step 1: Register an Account

Sign up at pias5proxy.net with an email address only — no phone, no identity documents, no payment card required to register. The process takes under two minutes. Note: during the May 2026 reopening, existing account migrations are still in progress.

Step 2: Choose Your Product and Plan

Select from SOCKS5 Pay-Per-IP, Residential Pay-Per-GB, Static ISP, or a Bundle. Pick the tier that matches your volume. If you’re during the reopening sale period, apply promo code OPEN30 at checkout for an additional 30% off. Pay via supported crypto (USDT TRC20/BEP20, BTC, ETH, TRX, XMR, LTC).

Step 3: Confirm Payment and Access

Crypto payments are processed manually after transaction confirmation — typically 5–10 minutes for supported coins. Once confirmed, your IP balance or bandwidth credit appears in the dashboard. There are no automatic subscriptions on SOCKS5 plans; Static ISP plans renew monthly.

Step 4: Configure Your Proxy Connection

Log into the dashboard, navigate to the proxy generator, select your target country, city, ISP, and session type (rotating or sticky). Copy the generated proxy credentials (host:port:user:pass or IP-whitelisted endpoint) and paste them into your tool — antidetect browser, Selenium script, Scrapy spider, or any SOCKS5-compatible client.

Step 5: Run and Monitor

Your requests route through a residential IP in the selected location. The dashboard shows remaining IP balance or GB consumed. Sub-accounts (on Basic and above) let team members share the same credit pool with separate credentials. Export IP lists, rotate via API, or switch session types without re-purchasing.

PIA S5 Proxy Pricing & Plans

PIA S5 Proxy pricing works differently from mainstream competitors. SOCKS5 plans charge per IP with no expiry — not per GB, not per month. Residential plans charge per GB. Static ISP plans charge per IP per month. All prices below are from the May 2026 reopening sale and may not reflect current rates — always verify at pias5proxy.net before purchasing.

SOCKS5 Pay-Per-IP Plans

Residential Pay-Per-GB Plans

Static ISP Proxies (Monthly)

Bundle Plans (mix SOCKS5 + Residential + Static ISP):

• Starter Bundle: 500 SOCKS5 IPs + 20 GB residential + 5 static ISP IPs — $89 (was $145, save 38%)
• Pro Bundle: 3,000 SOCKS5 IPs + 100 GB residential + 20 static ISP IPs — $299 (was $475, save 37%)
• Mega Bundle: 10,000 SOCKS5 IPs + 500 GB residential + 100 static ISP IPs — $799 (was $1,295, save 38%)

Refund policy: 24-hour money-back guarantee stated on the pricing page. This is a manual process — contact support within 24 hours of purchase if you’re unsatisfied. Given crypto-only payments, there’s no automated refund mechanism.

Pros & Cons

How PIA S5 Proxy Compares to Alternatives

The two most common alternatives users consider when evaluating PIA S5 are Bright Data and Oxylabs — both established, publicly accountable providers with significantly higher price floors but also significantly cleaner compliance records.

PIA S5 Proxy vs Bright Data: Price vs Legitimacy

Winner for Price: PIA S5 Proxy by a large margin | Winner for Legitimacy & Safety: Bright Data, not close | Winner for Enterprise Use: Bright Data | Winner for Crypto/Anonymous Workflows: PIA S5 Proxy

PIA S5 Proxy vs Oxylabs: Budget vs Compliance

Winner for Price: PIA S5 Proxy | Winner for Compliance: Oxylabs | Winner for Enterprise SLA: Oxylabs | Winner for No-KYC Workflows: PIA S5 Proxy

PIA S5 Proxy Ratings Breakdown

Our pias5proxy.net scores reflect real-world performance claims, pricing competitiveness, and the significant legitimacy concerns documented by security researchers. No proxy review should score a service with DOJ-linked connections above 3.1 overall, regardless of price:

Rating Summary: PIA S5 Proxy scores high on pure product metrics — pricing, pool size, and protocol support. The legitimacy score drags the overall down hard. A provider with these network connections, no company registration, crypto-only payments, and zero public review presence simply cannot score above average overall, regardless of how cheap the IPs are.

Is PIA S5 Proxy Legit, Safe & Worth It?

Legitimacy & Safety

This section requires more space than typical proxy reviews because the facts are significant and documented.

• ✗ KrebsOnSecurity finding (October 28, 2025): Security researchers Ben Brundage (Synthient) and Spur identified PIA S5 Proxy as one of multiple brands — alongside 922Proxy, ABCProxy, Roxlabs, LunaProxy, PyProxy, 360Proxy, IP2World, and Cherry Proxy — operating under a corporate umbrella called HK Network, linked to a China-based proxy company called IPidea. (Per reporting by KrebsOnSecurity, October 28, 2025 — search “HK Network proxy” at krebsonsecurity.com for the original article.)
• ✗ 911S5 connection: 922S5Proxy (which PIA S5 rebrands from) is described by researchers as “a not-so-subtle nod to the 911S5Proxy service.” The original 911S5 operated until July 2022 when it was hacked and shut down. Its owner, Yunhe Wang (Beijing), was arrested by the US Department of Justice in May 2024 and sanctioned by the US Treasury for allegedly operating a botnet used to steal billions of dollars from financial institutions, credit card issuers, and federal lending programs.
• ✗ IP sourcing concerns: Researchers found that IPs in networks like this are often sourced through bandwidth-sharing apps, VPN SDKs, and in some cases botnets, where device owners may not fully understand their internet connection is being sold as a proxy. PIA S5 claims IPs are sourced via opt-in partnerships with VPN and consumer software providers.
• ✗ No company registration: There is no registered legal entity, no physical address, and no jurisdiction published anywhere on the site. Terms reference “PIA S5 Proxy” generically. No GDPR data controller information exists.
• ✗ Crypto-only, no KYC: While marketed as a privacy feature, this structure also eliminates all consumer protections. There are no chargebacks, no payment disputes, and no mandatory identity verification — all of which makes it easier to operate without accountability.
• ✓ Acceptable Use Policy: The site prohibits illegal activity, spam, fraud, and malware — standard language, though not enforceable against anonymous users.
• ✓ 24-hour refund guarantee: Stated on the pricing page. Manual process, but it does exist.

Long-Term Reliability

The track record here is short. The current domain (pias5proxy.net) launched May 2026. Previous domains (pia-s5.com, 922s5.com) are no longer active. Old accounts cannot yet be migrated. That means if you buy IPs today and the service goes dark again — as it did in February 2026 — your balance is gone with no legal recourse and no chargeback available. This is the most concrete risk you face as a buyer.

Worth It? Final Verdict

PIA S5 Proxy FAQ: Your Questions Answered

Final Verdict

PIA S5 Proxy offers the most aggressive per-IP pricing we’ve seen in the residential SOCKS5 market — $0.24/IP at entry, scaling to $0.05/IP at bulk — with a no-expiry model that no mainstream competitor matches. On raw numbers, it competes with the best SOCKS5 proxy providers in terms of pool size (350M+ claimed vs Bright Data’s 72M and Oxylabs’ 100M), geo coverage (200+ countries), and cost. Native SOCKS5, unlimited concurrent sessions, and no monthly minimum round out a technically compelling product.

But the KrebsOnSecurity findings from October 2025 are not a minor caveat. They connect PIA S5 to a network whose predecessor led to a US DOJ arrest, a US Treasury sanctions order, and allegations of a botnet used to steal billions of dollars. The service has no published company registration, accepts no card payments, has no chargeback mechanism, and offers no compliance documentation. These are deal-breakers for any business with vendor due-diligence requirements.