Sites using AI Training Opt-Out Header
AI Training Opt-Out: HTTP header declaring publisher opt-out of AI training on content
5 sites
3 found by StackScope, 2 via launch platforms
- StackScope Wider Web 2
- StackScope Discovery (Indie) 1
- Product Hunt 1
- PeerPush 1
AI Training Opt-Out Header has been detected on 5 launches since first appearing in May 2026. Most recent detection: batteryhealth — how fast is your iPhone battery really ageing?, 4 days ago.
It's most commonly paired with Google Search Console, Vercel, and Next.js.
Share of new sites using AI Training Opt-Out Header
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before June 2026. Chart starts at first detection.
The shaded part of the chart is measured against a different set of sites. Until 8 July 2026 we only tracked launches from launch platforms; from that date we crawl the wider web as well. The share is a proportion of whatever we were tracking at the time, so it can step at that line without the technology itself changing. For a single continuous measure, switch to launch platforms.
How StackScope detects technologies
⋮ Jul 1, 2026: Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.
Security leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – | HSTS | 47.09% | 91.15% |
| #2 | – |
Cloudflare Bot Management
|
11.14% | 21.55% |
| #3 | – |
Google reCAPTCHA
|
1.82% | 3.52% |
| #4 | – |
DDoS-Guard
|
0.09% | 0.18% |
| #5 | ▲1 |
Anubis
|
0.07% | 0.13% |
| … | ||||
| #83 | AI Training Opt-Out Header Current page | <0.01% | <0.01% | |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Security tool. All 247 in Security →
Often used with
| Tool | Launches |
|---|---|
Google Search Console
|
2 |
Vercel
|
2 |
Next.js
|
2 |
React
|
2 |
| HSTS | 2 |
Tools most often detected on the same launches as AI Training Opt-Out Header.
Recent launches we can show
3 of the 5 sites using AI Training Opt-Out Header are product launches we list individually. The other 2 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. How StackScope Discovery works
The StackScope API serves all 5 sites using AI Training Opt-Out Header, filterable and exportable, from £15 a month.