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Startapp

Ad Exchange

Sell-side platform for mobile in-app ads

Profile

TierMid-market (1,000+)
SpecialtyCTV · Audio · Native · Location · Open web
OwnsIts own SSP · Its own data
Unique dataLocation data
Same publishers asMagnite · OpenX · Equativ

Running campaigns

Audience dataFirst-party audiences

What you buy

FormatsDisplay · Video · Native · High impact · CTV · Audio
Deal typesOpen auction · PMP

Reach

publishers1,092
Direct share14%
Confirmed by the exchange0 / 157

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

Quality

Median publisher rank#109,504
Supply score30 / 100 · #834 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