Start.io

Start.io describes itself as a mobile-driven supply-side platform that connects app publishers with programmatic demand, and as a mobile marketing and audience platform for marketers. It analyzes more than 100 billion first-party mobile signals a day and delivers hundreds of millions of ad impressions across thousands of apps.

For advertisers, the offer is access to curated mobile audiences across 2.5 billion monthly active users. Its AI engine, Maia, builds intent-based and behavioral audience segments, and Start.io offers more than 4,000 pre-packaged segments as well as custom audiences.

The platform supports all mobile in-app ad formats and standards, including banners, interstitials, native and video, and it is an IAB member. The site states 500,000 active mobile apps and 35 billion SDK downloads, with global coverage outside China.

On privacy, Start.io states support for GDPR, CCPA/CPRA, COPPA and LGPD through a first-party data framework that requires explicit user consent.

The homepage does not state pricing models, a minimum spend, payment methods, preferred verticals, a founding year or whether campaigns are self-serve, so those fields are left empty in this profile until an official page confirms them. Start.io is present on X and Facebook, which are listed below.