Topsort

Topsort provides AI-powered auction tools and infrastructure APIs to help brands build ad businesses without cookies or user tracking. Put simply, it is about planning, buying and reporting on paid ads across channels.

Who is it for? Mostly performance marketers and agencies. They also list Ad Exchange, Advertising Platforms, Artificial Intelligence (AI), E-Commerce Platforms and Marketplace, so expect those to show up in the feature set. They are a mid-sized team, 51 to 200 people, which usually shapes who they work with.

Topsort is based in Palo Alto, California and around since 2021. You can read more at topsort.com.

Our checklist for this category: platform coverage, attribution model, and fees as a share of spend. Get the renewal terms in writing before the first invoice.

If you have worked with Topsort, tell the next buyer what you paid and what surprised you. That is the part of this page we cannot write.