Start.io (start.io) — ad network

Website: www.start.io

Start.io is an advertising system that app publishers list in their app-ads.txt as “start.io”. 3,806 checked publishers list it (1,190 with a DIRECT account, 3,735 through resellers). Its sellers.json lists 2,519 sellers: 2,455 publishers, 59 intermediaries, 5 both.

sellers.json

Read 21 Oct 2026 from https://www.start.io/sellers.json. Its sellers.json lists 2,519 sellers: 2,455 publishers, 59 intermediaries, 5 both. We read it weekly to verify the seller accounts in publishers’ app-ads.txt files.

Of the 289 Start.io seller IDs we have seen in checked app-ads.txt files, 233 are in this sellers.json and 56 are not.

app-ads.txt template

Start.io is in our generator with a template of its partner lines, refreshed daily: create an app-ads.txt with Start.io.

Publishers that list Start.io

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