Allegro AI Visibility Trend in Second-hand Marketplaces
Second-hand Marketplaces · ChatGPT · AI Index over time
Trend Overview
Second-hand Marketplaces AI visibility trends show how entity AI Index scores have moved across 10 completed public ChatGPT leaderboard snapshots from May 22, 2026 to Jun 19, 2026.
eBay leads the latest ChatGPT snapshot with a 98.6 AI Index and 100% mention rate.
The chart currently compares eBay, Poshmark, Mercari. Use the entity filters to separate durable visibility trends from one-off ranking movement in a single AI engine.
Read this trend alongside the main Second-hand Marketplaces leaderboard and entity pages: the trend view explains historical movement, while ranking pages show the latest cross-entity position, mention rate, and score gap.
Trend Summary
| Entity | Latest AI Index | Start AI Index | Delta | Mention Rate | Latest Rank | Best Rank | Trend |
|---|---|---|---|---|---|---|---|
| eBay | 98.6 | 97.1 | +1.4 | 100% | #1 | #1 | Stable |
| Poshmark | 60.6 | 69.9 | -9.3 | 71.4% | #2 | #2 | Declining |
| Vestiaire Collective | 54.5 | 50.4 | +4 | 42.9% | #3 | #3 | Stable |
| Mercari | 53.9 | 57.6 | -3.7 | 57.1% | #4 | #2 | Stable |
| Depop | 44.1 | 53.6 | -9.4 | 42.9% | #5 | #4 | Declining |
Biggest Movers
Biggest gainers
- StockX+20.1
- Grailed+5
- Vestiaire Collective+4
Biggest decliners
- Vinted-67.3
- Facebook Marketplace-25.1
- The RealReal-24.9
Most stable
- eBay+1.4
- Gumtree+2
- Craigslist-3
Engine Snapshot Comparison
Snapshot History
| Date | Leader | Leader AI Index | Leader Gap | Top 3 | Entities |
|---|---|---|---|---|---|
| Jun 19, 2026 | eBay | 98.6 | 38 | eBay, Poshmark, Vestiaire Collective | 17 |
| Jun 12, 2026 | eBay | 95.7 | 35.1 | eBay, Poshmark, Mercari | 18 |
| Jun 10, 2026 | eBay | 74.9 | 14 | eBay, StockX, Mercari | 18 |
| Jun 8, 2026 | eBay | 95.7 | 30.1 | eBay, Mercari, Vestiaire Collective | 17 |
| Jun 6, 2026 | eBay | 83.8 | 24.2 | eBay, Poshmark, Mercari | 20 |
Continue from Here
ChatGPT· AI Index History
10 data points
Loading chart...
Compare Entities
Click to show or hide entities on the chart