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Start.io

SSP

Mobile Marketing & Audience Platform for Marketers

Profile

TierMid-market (1,000+)
SpecialtyLocation
OwnsIts own SSP · Its own data
Unique dataLocation data
Same publishers asOpenX · Microsoft Monetize · PubMatic

Running campaigns

Audience dataFirst-party audiences

What you buy

FormatsVideo
Deal typesOpen auction · Curated

Reach

publishers3,307
Direct share9%
Confirmed by the exchange16 / 310

North America · Latin America · Europe · Middle East & North Africa · Sub-Saharan Africa · South Asia · East Asia · Southeast Asia · Central Asia & Caucasus · Oceania

Quality

Ad-heavy sites reached7.1%
Median publisher rank#113,238
Supply score33 / 100 · #780 of 1,175

How to buy

How to open an account here, what it takes and the minimum spend.

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In the news

Launched

Sep 14, 2026

Introducing Start.io Curation+ (Agentic Campaign Intelligence): From RFP to Activated Campaign in One Place

Launched

Jul 15, 2026

Introducing Start.io Performance Audiences: A New Layer of Targeting Built on Real Advertising Behavior

All 8 stories about Start.io