Rare Crowds

Rare Crowds develops a fully open source advertising stack that has built in automation for the buying and selling of digital media. The job it does: planning, buying and reporting on paid ads across channels.

Who is it for? Mostly performance marketers and agencies. Alongside the main category they mention Advertising, Digital Media, Open Source, Publishing and Video. They are a small team, 11 to 50 people, which usually shapes who they work with. You will probably talk to the people who build it, which is great until you need 24/7 support.

Rare Crowds is based in Bellevue, Washington. Their site is rarecrowds.com.

Our checklist for this category: platform coverage, attribution model, and fees as a share of spend. Ask for a trial on your own data, not a canned demo.

Every review on Revaw shows how it was verified, so if you know Rare Crowds well, your review carries weight here.