Mercari 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 10, 2026 to Jun 8, 2026.
eBay leads the latest ChatGPT snapshot with a 95.7 AI Index and 100% mention rate.
eBay is up 27.3 AI Index points across the visible window, moving from 68.4 to 95.7 on ChatGPT.
The chart currently compares 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 |
|---|---|---|---|---|---|---|---|
| Mercari | 65.6 | 42.1 | +23.4 | 71.4% | #2 | #2 | Rising |
| eBay | 95.7 | 68.4 | +27.3 | 100% | #1 | #1 | Rising |
| Vestiaire Collective | 51.5 | 33.9 | +17.6 | 42.9% | #3 | #3 | Rising |
| Poshmark | 46.9 | 41.8 | +5 | 57.1% | #4 | #2 | Rising |
| Depop | 43.1 | 15.7 | +27.4 | 42.9% | #5 | #5 | Rising |
| Facebook Marketplace | 34.7 | 30 | +4.7 | 14.3% | #6 | #6 | Stable |
Biggest Movers
Biggest gainers
- Depop+27.4
- eBay+27.3
- Mercari+23.4
Biggest decliners
- Back Market-71.3
- GOAT-50.9
- The RealReal-30.3
Most stable
- Yahoo! Auctions0
- Allegro0
- Jiji0
Engine Snapshot Comparison
Snapshot History
| Date | Leader | Leader AI Index | Leader Gap | Top 3 | Entities |
|---|---|---|---|---|---|
| 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 |
| Jun 4, 2026 | eBay | 91.4 | 27.9 | eBay, Mercari, Poshmark | 18 |
| Jun 2, 2026 | eBay | 95.7 | 31.6 | eBay, Vinted, Mercari | 23 |
| May 31, 2026 | eBay | 97.1 | 26.8 | eBay, Vinted, Poshmark | 16 |
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ChatGPT· AI Index History
10 data points
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