What Shopify apps does ThirdLove use?

Heidi Zak and Dave Spector founded ThirdLove with a half-cup-size patent — moving the category from standard A/B/C/D-only sizing into 80+ sizes. The brand's fit-finder quiz captured millions of sizing data points and effectively crowd-sourced category R&D. Famous for the open-letter ad criticising Victoria's Secret in 2018 that became a viral marketing case study.

What this stack reveals

ThirdLove runs 12 signature-matched apps plus 20 unidentified theme app extensions / App Proxy routes — that's a brand with a deep enterprise stack where many apps inject without leaving a name-recognisable signature. Common in Shopify Plus tenants at this scale because checkout extensions + headless integrations don't always emit the CDN hosts that smaller installs do.

Cross-check with the Theme Detector to see what the underlying theme + customisation depth signals, or the Schema Audit to spot the typical rich-result gaps at this brand scale.