Bright Data and MarsProxies occupy opposite ends of residential pool scale — 150M+ IPs versus 1M+. That gap alone would be enough to separate most use cases. What makes this comparison worth examining is that MarsProxies has concentrated its differentiation elsewhere: session control with sub-minute granularity, ISP proxies with a 99.99% uptime commitment and failed IP replacement guarantee, and dedicated non-shared mobile IPs on daily or monthly lease terms.

Bright Data delivers residential depth at enterprise scale: ASN and carrier targeting, a contractual SLA, HAR-level traffic instrumentation, and a pool large enough that IP diversity is not a limiting factor for high-volume workloads. MarsProxies delivers session control precision — sticky sessions configurable from 1 second to 7 days — alongside ISP reliability commitments that most residential-focused providers do not extend to their static products.

Teams choosing between them are choosing between residential pool scale with enterprise guarantees and session-level precision with a significantly smaller pool.

Bright Data suits teams that require a residential pool large enough to avoid IP repetition at scale, ASN or carrier-level targeting, a contractual SLA, HAR-level traffic debugging, or dedicated residential IP assignment. The limitations are consistent: KYC gates full residential access, sticky session TTL is fixed at 7 minutes, and compliance documentation is self-produced without ISO certification.

MarsProxies suits teams that need precise session duration control — sticky sessions configurable from 1 second to 7 days — without the scale requirements that make Bright Data's pool necessary. ISP proxies include a 99.99% uptime commitment and guaranteed failed IP replacement. Non-expiring PAYG residential traffic requires no monthly commitment. The limitations are significant: the residential pool at 1M+ IPs is small relative to high-volume scraping needs, ASN targeting is not documented, no SLA exists for the residential network, and no free trial is offered.

Bright Data's philosophy is that enterprise proxy infrastructure requires both depth and contractual accountability. The SLA commits to 99.99% uptime and a 15-minute engineer response. ASN and carrier targeting extend precision to network-operator level. The Proxy Manager exposes HAR-level traffic for debugging. The pool at 150M+ residential IPs means IP exhaustion is not a practical operational constraint. The product is built for teams whose scale and requirements justify the enterprise onboarding process.

MarsProxies' philosophy is that session control precision is the underserved variable in proxy operations. Configuring a sticky session to last exactly 90 seconds — or 3 minutes, or 2 hours, or 5 days — covers workloads with detection patterns that require specific timing windows. The 1-second floor is the finest published session granularity in this comparison set. On the ISP side, MarsProxies commits to 99.99% uptime and guarantees replacement of failed IPs — a reliability standard more commonly associated with datacenter products than ISP static proxies.

You gain residential pool scale, targeting precision, and contractual guarantees with Bright Data. You give up sub-minute session granularity and ISP reliability commitments. With MarsProxies, the trade runs in reverse — you gain session control precision and ISP reliability guarantees, and residential pool scale, ASN targeting, and a contractual SLA become unavailable.

Bright Data's residential pool is provider-reported at 150M+ unique IPs across 195 countries. Residential and mobile proxies support country, state, city, ZIP, ASN, and carrier targeting. Session TTL is fixed at 7 minutes and not configurable. Dedicated residential IPs with exclusive peer assignment are available. Four proxy types: residential rotating and dedicated, datacenter, mobile, and ISP static.

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 session duration is the finest granularity documented in this comparison set. Mobile proxies use automatic 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 are dedicated IPs with unlimited bandwidth and flexible lease terms of 1, 7, 30, 60, or 90 days.

Bright Data authenticates via username and password in the proxy URL. Targeting parameters are passed as flags in the proxy username per request. Session TTL is fixed at 7 minutes. The REST API covers zone management and configuration. The open-source Proxy Manager handles multi-zone orchestration with HAR logging and automatic failover. KYC is required before full residential access.

MarsProxies supports both username and password authentication and IP whitelist authentication. HTTP/S and SOCKS5 protocols are confirmed; UDP is not documented. Session duration is configured directly — the 1-second-to-7-day range is available without contacting support. 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.

Bright Data bills residential and mobile proxies per GB, with PAYG and subscription tiers available. Free trial credits are provided for new accounts. Sticky session duration is fixed and cannot be extended beyond the 7-minute idle threshold. KYC must be completed before billing can begin on the full residential 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.

A residential pool that supports high-volume scraping without IP repetition, ASN or carrier targeting, a contractual SLA, or HAR instrumentation are requirements. Bright Data fits.

Sticky sessions configurable to the second — from 1 second to 7 days — ISP proxies with a 99.99% uptime guarantee, dedicated mobile IPs on flexible lease terms, and non-expiring PAYG billing are the priorities. MarsProxies fits.

You gain residential scale, targeting precision, and contractual guarantees with Bright Data. You give up sub-minute session granularity. With MarsProxies, the trade runs in reverse — you gain session precision and ISP reliability guarantees, and residential scale, ASN targeting, and a contractual SLA become unavailable.

Neither fits teams that need both large residential pool depth and sub-minute sticky session control in the same product.

Ask whether your workload generates enough requests that IP repetition at the 1M+ pool size becomes a practical problem — or whether you need ASN-level routing, a contractual SLA, or HAR-level debugging. If yes to any of these, Bright Data's scale and infrastructure depth are the fit.

Ask whether your scraping workflow depends on controlling exactly how long a session holds — measured in seconds or hours rather than a fixed interval — or whether ISP static proxies with a documented uptime commitment are the operational requirement. If yes, MarsProxies' session granularity and ISP reliability guarantee address those priorities directly, and the residential pool's size is the constraint to accept.

If your requirement is residential scale and enterprise guarantees — Bright Data. If your requirement is session precision and ISP reliability — MarsProxies.