Sites using OpenAI Codex
Agentic coding tool from OpenAI that writes, edits and reviews software from natural language instructions.
Get told when a new site ships with OpenAI Codex.
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See how alerts work55 sites
49 found by StackScope, 6 via launch platforms
- StackScope Wider Web 27
- StackScope Discovery (Indie) 22
- Product Hunt 4
- Hacker News 2
OpenAI Codex has been detected on 55 launches we've crawled, with 8 of those in October 2026 (0.0% of the month's launches so far). The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: Shogun Agents — Agents IA et architectures sur mesure, yesterday.
It's most commonly paired with OpenAI API, Cloudflare DNS, and Cloudflare. By product type, the launches using it are most often AI (34%), Developer Tools (34%), and Education (9%).
What kind of products ship with OpenAI Codex
32 launches
Domain endings using OpenAI Codex
55 sites
- .com 38.18%
- .dev 18.18%
- .ai 10.91%
- .io 5.45%
- .me 5.45%
- .org 5.45%
- .app 3.64%
- .art 1.82%
Share of new sites using OpenAI Codex
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026. Chart starts at first detection.
The shaded parts of the chart are measured against a different set of sites.
Grey: until 8 July 2026 we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: on 10 September 2026 we improved our infrastructure so we can index new sites much sooner, often on the day they go live. Sites found that early often haven't finished setting up, so anything usually added after launch reads lower from that date. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time, so it can step at these lines without the technology itself changing. For a single continuous measure, switch to launch platforms.
Developer Tools leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Vite
|
23.54% | 97.39% |
| #2 | – |
Rspack
|
0.36% | 1.51% |
| #3 | – |
pywb (Wayback Machine toolkit)
|
0.08% | 0.34% |
| #4 | – |
SheetJS
|
0.07% | 0.29% |
| #5 | ▲1 |
Instant.page
|
0.05% | 0.22% |
| … | ||||
| #48 | ▼26 | OpenAI Codex Current page | <0.01% | <0.01% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Developer Tools tool.Among September launches it ranked #64 in Developer Tools, down from #38 in August. All 445 in Developer Tools →
Often used with
| Tool | Sites |
|---|---|
OpenAI API
|
49 |
Cloudflare DNS
|
28 |
Cloudflare
|
27 |
Cursor
|
27 |
| HSTS | 27 |
Tools most often detected on the same sites as OpenAI Codex.
Recent launches we can show
28 of the 55 sites using OpenAI Codex are product launches we list individually. The other 27 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
BotBus
AI
Company Registry API - Free Tier
Developer Tools
Meerko — the open-source AI sales agent
AI
The Last SaaS
Developer Tools
CoreSpeed
AI
Siteory — Your website, fully understood
Parallel - Web Infrastructure for AI Agents
НейроСтудия - Каталог VPL
BOS. - Your business's second brain, your team, your data
Productivity
Can I Build My Own? | Replace your software subscriptions with AI
Complete codebase changes with coding agents | coral-code
AI
Showing the most recent 12 of 28.
The StackScope API serves all 55 sites using OpenAI Codex, filterable and exportable, from £15 a month.