IPRoyal and MarsProxies share a meaningful overlap: both offer sticky sessions measured in days rather than minutes, and both bill residential traffic without expiry on PAYG plans. That shared profile makes the comparison finer-grained than most in this set.

IPRoyal documents sticky sessions at up to 7 days explicitly and publishes per-country residential IP counts — US: 4.2M+, India: 3.7M+, China: 2.5M+ — alongside a 58-second average support response time. MarsProxies offers sticky sessions configurable from 1 second to 7 days — the widest documented range in this set — and backs its ISP proxies with a 99.99% uptime commitment and guaranteed failed IP replacement.

Both serve teams that need long sessions and non-expiring data. The comparison turns on pool transparency and a documented support metric versus sub-second session granularity and ISP reliability guarantees.

IPRoyal suits teams that value per-country IP count transparency, a documented sub-minute support response time, and ZIP or state targeting alongside sticky sessions up to 7 days. Non-expiring PAYG without contracts. The limitations: pool at 32M+, ASN targeting not documented on residential, carrier targeting not documented on mobile.

MarsProxies suits teams that need sticky sessions configurable to the second — from 1 second to 7 days — ISP proxies with 99.99% uptime and guaranteed failed IP replacement, and non-expiring PAYG. The limitations: residential pool at 1M+ is small for high-volume workloads, ASN targeting not documented, no compliance certifications, no free trial.

IPRoyal's philosophy is that pool transparency and session legibility are the practical variables teams need. Per-country IP counts published as specific figures let teams verify coverage before committing. Sticky sessions documented at up to 7 days are explicitly published — not described as 'a longer period.' The 58-second average support response time is documented as an operational fact. Non-expiring PAYG removes billing-cycle pressure.

MarsProxies' philosophy is that session control precision and ISP reliability are underserved. Sticky sessions from 1 second to 7 days — with sub-minute granularity — cover workloads that require specific timing windows. ISP proxies with 99.99% uptime and guaranteed IP replacement deliver predictable availability without manual monitoring. Non-expiring PAYG removes billing-cycle pressure.

You gain pool transparency, a documented support commitment, and ZIP targeting with IPRoyal. You give up sub-second session granularity and ISP uptime guarantees. With MarsProxies, the trade runs in reverse — you gain sub-second session control and ISP reliability commitments, and pool transparency, the support metric, and a larger residential pool become unavailable.

IPRoyal's residential pool is provider-reported at 32M+ IPs across 195 countries. Per-country counts published: US 4.2M+, India 3.7M+, China 2.5M+, UK 2.0M+, Germany 2.0M+, France 1.9M+. Country, state, ZIP, and city targeting confirmed. ASN targeting not documented. Sticky session TTL up to 7 days and explicitly documented. Mobile 4.5M+ IPs; carrier targeting not documented. ISP static in 31+ countries. Datacenter dedicated-only in 50+ countries with 99.9% uptime.

MarsProxies' residential pool is provider-reported at 1M+ IPs across 195 countries. Country, state, and city targeting confirmed. ASN targeting not documented. Sticky sessions configurable from 1 second to 7 days — finest granularity in this set. Mobile rotation-only; sticky not available on mobile. ISP proxies in 30+ countries with 99.99% uptime and guaranteed failed IP replacement — dedicated, non-shared. Datacenter dedicated only with failed IP replacement.

IPRoyal supports IP whitelist alongside credential-based access. Two-factor authentication available. Sticky sessions hold up to 7 days. Dashboard monitoring for datacenter proxies. HTTP/S and SOCKS5 confirmed. The 58-second average support response time documented on datacenter documentation page.

MarsProxies supports username and password and IP whitelist authentication. Session duration from 1 second to 7 days configured directly without support contact. HTTP/S and SOCKS5 confirmed; UDP not documented. 24/7 support via live chat, email, and Discord. No published response time SLA.

IPRoyal's residential PAYG traffic is non-expiring. No contracts required. Bulk discounts at higher volumes. Datacenter billed per IP per month. ISP billed per IP. Mobile unlimited traffic plans monthly. No free tier.

MarsProxies bills residential per GB on non-expiring PAYG with bulk discounts. No monthly commitment. No free trial — minimum 1 GB purchase. Crypto payments accepted. ISP and datacenter billed per IP. Mobile billed per device on flexible lease terms.

Per-country IP count transparency, ZIP targeting, a documented sub-minute support response time, or a residential pool larger than 1M+ IPs are priorities — alongside long sessions and non-expiring PAYG. IPRoyal fits.

Sticky sessions configurable to the second from 1 second to 7 days, ISP proxies with 99.99% uptime and replacement guarantee, and the residential workload fits within 1M+ IPs — alongside non-expiring PAYG. MarsProxies fits.

You gain pool transparency, a documented support commitment, and ZIP targeting with IPRoyal. You give up sub-second session granularity and ISP uptime guarantees. With MarsProxies, the trade runs in reverse — you gain session precision and ISP reliability, and pool transparency, the support metric, and a larger residential pool become unavailable.

Neither holds compliance certifications — teams with those requirements should look elsewhere in this set.

Ask whether per-country IP count transparency or ZIP targeting matters before committing — or whether a documented sub-minute support response time is an operational requirement. If yes, and the residential pool size fits your workload, IPRoyal's transparency and support metric address those needs.

Ask whether your scraping workflow depends on controlling session duration to the second — or whether ISP proxies with a documented uptime commitment are the priority. If yes, and the 1M+ residential pool fits, MarsProxies' session granularity and ISP reliability are the fit.

If your requirement is pool transparency and a documented support commitment — IPRoyal. If your requirement is session precision and ISP reliability — MarsProxies.