Galaksion has operated since 2014 out of Riga and serves 50 billion monthly impressions across 245 geos through 30,000+ direct publisher partners - meaning the traffic chain is short and CPMs stay reasonable. Push notification and on-page notification (their in-page variant) are supported alongside interstitial, native, and direct link, and the built-in traffic estimator lets you preview available volume before committing budget to a campaign. The anti-fraud system and personal account manager are included at no extra cost regardless of spend tier.

Not the cheapest network on paper, but direct publisher relationships mean fewer bot-inflated sources compared to reseller-heavy platforms.