SSP Comparison

Stellor Media vs. OpenX — Which SSP is Right for Your Site?

A managed publisher-first SSP versus a long-established independent ad exchange — which fits your publishing business?

OpenX is one of the longest-tenured independent SSPs/ad exchanges, with a focus on header bidding, identity, and cookieless monetization. They serve large publishers and have invested heavily in supply-path optimization and deal-id curation.

Stellor Media is a publisher-first SSP designed for the mid-market web publisher: managed onboarding, dedicated account management, and yield optimization aligned to publisher revenue rather than total marketplace volume.

Note: OpenX information is based on publicly available sources. Verify current programs and requirements directly with OpenX.

Feature Comparison

Feature	Stellor Media	OpenX
Tenure & Scale	Publisher-first SSP	Established independent ad exchange
Onboarding	48-hour managed setup	Enterprise integration timeline
Header Bidding	Prebid.js — managed	Prebid.js + OpenAudience identity
Cookieless / Identity	UID2, RampID via demand partners	OpenAudience, multiple ID solutions
Publisher Size Focus	Mid-market web publishers	Larger established publishers
Account Management	Dedicated AM for every partner	Tiered by publisher scale

When to Choose Stellor Media

Mid-market web publishers who want fast onboarding and managed yield work
Publishers who want a partner that proactively optimises rather than a self-serve dashboard
Sites that haven't met OpenX scale thresholds and want a programmatic SSP today

When OpenX Might Be Better

Large publishers with established programmatic operations and identity strategies
Publishers who specifically want OpenAudience identity infrastructure
Publishers who already have OpenX in their auction and are satisfied with results

Frequently Asked Questions

Can I run Stellor and OpenX together?

Yes. Both run in Prebid.js and compete bid-by-bid. Most mid-market publishers add Stellor without removing existing demand sources.

Does OpenX have minimum traffic requirements?

OpenX historically focuses on larger publishers; current thresholds should be confirmed with their team. Stellor has no fixed traffic floor — see our publisher quiz for fit.

See How Stellor Media Performs on Your Inventory

The best comparison is a live head-to-head test. Stellor Media integrates via Prebid.js alongside your existing setup — no risk to existing revenue while you evaluate.

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