Primer

Primer turns a company's ideal customer profile or account list into high-match B2B audiences and pushes them across consumer ad channels like Meta, Google, LinkedIn and Reddit, then measures real pipeline impact with website de-anonymization and holdout testing. Founded in 2019 and based in San Francisco, Primer resolves identities and runs enrichment waterfalls to deliver 3-5x better match rates than CSV uploads, helping growth and ABM teams prove advertising ROI instead of guessing at it.