In January 2026, the addition of 437,606 new ads.txt lines and the removal of 398,123 existing lines resulted in a net change of approximately 58.8k + lines, showing an increase from December with an even stronger positive shift this month.
The changes in the ads.txt lines show notable improvements compared to previous months. Here are some top SSPs that have gained a good number of new connections.
- PubMatic, Rubicon, and Index Exchange led ads.txt growth this month, reflecting their strong influence within the programmatic ecosystem. Continued investment in scalable infrastructure, SPO-aligned integrations, and sustained buyer demand has positioned them as preferred partners for publishers expanding authorized supply, with notable traction across mid- and low-traffic inventory, while maintaining a stable presence within high-traffic publishers.
- Sharethrough and OpenX followed closely, driven by steady publisher onboarding and targeted expansion across key inventory types. Their emphasis on curated supply, format-specific monetization, and direct marketplace controls has enabled consistent growth in new authorized connections, supporting continued adoption across publisher segments.
Want to know more? Please download the full report for a detailed breakdown.
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