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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
OwnsOwn SSP · 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

publishers2,934
Direct share12%
Confirmed by the exchange0 / 338

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#151,818
Ad spot score31 / 100 · #861 of 1,179

How to place an ad

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

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

Exchanges selling the same publishers as Startapp

8 exchanges

Publishers Startapp can sell

Which publishers this platform can sell, largest first.