Oxylabs and MarsProxies serve opposite ends of the residential pool scale — 175M+ IPs versus 1M+. At that gap, most comparisons end quickly. What makes this one worth examining is that MarsProxies has not tried to compete on residential scale. It has concentrated its differentiation on session control granularity and ISP infrastructure reliability, and the two dimensions do not overlap.

Oxylabs brings ISO 27001:2022, SOC 2 Type 2, EWDCI founding membership, ASN targeting, and sticky sessions configurable up to 24 hours. MarsProxies offers sticky sessions configurable from 1 second to 7 days — the widest documented TTL range in this comparison set — and ISP proxies backed by a 99.99% uptime commitment with guaranteed failed IP replacement.

Teams choosing between them have different requirements at their core. The pool size gap makes that clear without requiring analysis.

Oxylabs suits teams whose procurement requires ISO 27001, SOC 2, or EWDCI founding credentials — or whose residential workloads need a 175M+ pool to avoid IP repetition at volume, ASN targeting, mobile proxies with carrier targeting, or ZIP targeting. The limitations: KYC is mandatory before full access, PAYG is capped at 50 GB per month, and sticky sessions are capped at 24 hours.

MarsProxies suits teams that need precise session duration control — from 1 second to 7 days on residential proxies — without the scale requirements or compliance overhead that make Oxylabs necessary. ISP proxies include 99.99% uptime and guaranteed failed IP replacement. Non-expiring PAYG requires no monthly commitment. The limitations are significant: the residential pool at 1M+ IPs is unsuitable for high-volume workloads, ASN targeting is not documented, and no independent compliance certifications exist.

Oxylabs' philosophy is that enterprise proxy infrastructure requires independent verification at the compliance layer and depth at the network layer. ISO 27001:2022, SOC 2 Type 2, and EWDCI founding membership are third-party audits. The 175M+ residential pool, ASN targeting, and 24-hour configurable sticky sessions address demanding workloads. OxyCopilot and a REST API accessible at all tiers lower the integration overhead. The product assumes teams with defined requirements and organizational readiness to match.

MarsProxies' philosophy is that session control precision and ISP infrastructure reliability are underserved capabilities. Sticky sessions configurable from 1 second to 7 days cover the full spectrum of workload timing requirements without a ceiling. ISP proxies with 99.99% uptime and guaranteed replacement on failure extend that reliability into persistent-session use cases. Non-expiring PAYG residential traffic removes billing-cycle pressure. The residential pool at 1M+ IPs is honestly positioned — the provider does not claim scale it has not built.

You gain verified compliance, pool scale, and targeting precision with Oxylabs. You give up sub-second session granularity and ISP uptime guarantees. With MarsProxies, the trade runs in reverse — you gain session control across the full TTL range and ISP reliability commitments, and the compliance audit trail, residential scale, and ASN targeting become unavailable.

Oxylabs' residential pool is provider-reported at 175M+ IPs across 195 countries. Residential proxies support country, state, city, ZIP, and ASN targeting. Mobile proxies cover 20M IPs with carrier targeting and 3G/4G/5G support. ISP static and datacenter proxies are available. Sticky sessions are configurable up to 24 hours. Dedicated residential IPs with exclusive assignment are available.

MarsProxies' residential pool is provider-reported at 1M+ IPs across 195 countries. Country, state, and city targeting are confirmed at no extra cost. ASN targeting is not documented. Sticky sessions are configurable from 1 second to 7 days — the minimum duration is the finest granularity documented in this comparison set. Mobile proxies are rotation-only; sticky sessions are not available on mobile. ISP proxies are available in 30+ countries with 99.99% uptime documented and guaranteed failed IP replacement — dedicated, non-shared. Datacenter proxies are dedicated only in 30+ countries, also with failed IP replacement. Mobile proxies offer dedicated IPs with unlimited bandwidth on flexible 1, 7, 30, 60, or 90-day lease terms.

Oxylabs authenticates via username and password in the proxy URL, with IP whitelist authentication for up to 10 IPs. Targeting is configured via proxy username parameters per request. The REST API covers proxy configuration, zone management, and usage statistics at all tiers. OxyCopilot generates integration code from natural language. KYC is mandatory before full network access.

MarsProxies supports username and password authentication and IP whitelist authentication. Session duration — from 1 second to 7 days — is configured directly without contacting support. HTTP/S and SOCKS5 protocols are confirmed; UDP is not documented. 24/7 support is available via live chat, email, and Discord. No published response time SLA exists. Sub-user or team account management is not documented.

Oxylabs bills residential and mobile proxies per GB on subscription tiers and PAYG. PAYG is capped at 50 GB per month. A 7-day free trial is available without a credit card. Unused subscription GB does not roll over. KYC must be completed before billing begins on the full network.

MarsProxies bills residential proxies per GB on PAYG with non-expiring traffic and bulk discounts. No monthly commitment is required. No free trial is offered — minimum purchase starts at 1 GB. Crypto payments are accepted alongside credit card, PayPal, and Alipay. ISP and datacenter proxies are billed per IP. Mobile proxies are billed per device on daily or monthly lease terms.

ISO 27001, SOC 2, or EWDCI founding credentials are required — or ASN targeting, mobile carrier targeting, ZIP targeting, or a pool large enough for high-volume scraping are operational needs. Oxylabs fits.

Sticky sessions configurable to the second across a 1-second-to-7-day range, ISP proxies with a 99.99% uptime guarantee and replacement policy, and non-expiring PAYG billing are the priorities — and the residential workload fits within a 1M+ pool. MarsProxies fits.

You gain verified compliance, pool scale, and targeting precision with Oxylabs. You give up session control granularity and ISP reliability guarantees. With MarsProxies, the trade runs in reverse — you gain session precision and ISP reliability commitments, and the compliance audit trail, residential scale, and ASN targeting become unavailable.

Neither fits teams that need both a large residential pool and sub-minute session control granularity.

Ask whether your residential workload generates enough requests that 1M+ IPs creates an IP repetition problem — or whether ISO 27001, SOC 2, or ASN targeting are hard requirements. If yes to either, Oxylabs' scale and compliance stack are the fit, and the 24-hour session ceiling is the constraint to accept.

Ask whether your scraping workflow requires sessions measured in seconds or days — not fixed intervals — or whether ISP static proxies with a documented uptime commitment are the operational priority. If yes, and your workload fits within a 1M+ residential pool, MarsProxies' session granularity and ISP reliability guarantee address those requirements directly.

If your requirement is compliance scale and targeting depth — Oxylabs. If your requirement is session precision and ISP reliability — MarsProxies.