# Sift: Poshmark case study - Canonical HTML: https://growth.iangoh.com/sources/sift-poshmark-case-study-sift-com/ - Original source: https://sift.com/resources/case-studies/poshmark/ - Domain: sift.com - Latest check: 2026-06-07 - Channels: Marketplace, Retention, Trust & Safety ## Cited GrowthDex tactics - [Poshmark spam reduction as growth infrastructure](/growth-ideas/poshmark-spam-reduction-as-growth-infrastructure/) - Treat fraud and spam reduction as growth work when marketplace trust decides whether buyers and sellers keep participating. ## Related reading - [GrowthDex Blog](/blog/) - [All growth ideas](/growth-ideas/index.md)