Should publishers use both Magnite and PubMatic?
For publishers with mixed inventory (display and video/CTV), running both is common and recommended. Each SSP connects to different demand pools, and adding incremental SSPs increases bid density for each impression. The incremental cost of running both is low relative to the potential yield improvement from increased competition.
How do Magnite and PubMatic compare to Google AdX?
Google AdX (now part of Google Ad Manager) remains the largest SSP by volume for most publishers due to Google's dominant DSP position (DV360, Google Ads). Both Magnite and PubMatic are independent alternatives that provide access to non-Google demand, which is essential for publishers who want to diversify away from Google's ecosystem. Most publishers use AdX alongside independent SSPs rather than instead of it.
What is the minimum traffic requirement for these platforms?
Both platforms are oriented toward publishers with meaningful programmatic volume — typically 500,000+ monthly pageviews as a rough floor, though requirements vary by inventory type and geography. Smaller publishers are typically better served by managed ad networks like Ezoic or Mediavine that abstract the SSP relationships.