Sites built with Jac
Programming language and runtime that compiles to Python and ships a web frontend runtime for building applications.
4 sites
3 found by StackScope, 1 via launch platforms
- StackScope Wider Web 2
- StackScope Discovery (Indie) 1
- Hacker News 1
Jac has been detected on 4 launches since first appearing in July 2026. Most recent detection: LibreDraw - Free Online Whiteboard & Diagram Maker, on August 22, 2026.
It's most commonly paired with React Router, Zod, and Tailwind CSS.
Share of new sites using Jac
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
Framework leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
React
|
19.00% | 78.90% |
| #2 | – |
Vue.js
|
2.53% | 10.52% |
| #3 | – |
Svelte
|
0.81% | 3.38% |
| #4 | ▲1 |
Alpine.js
|
0.68% | 2.84% |
| #5 | ▼1 |
Angular
|
0.40% | 1.67% |
| … | ||||
| #45 | ▼3 |
Jac
Current page
|
<0.01% | <0.01% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Framework tool.Among August launches it ranked #43 in Framework, down from #40 in July. All 57 in Framework →
Often used with
| Tool | Sites |
|---|---|
React Router
|
4 |
Zod
|
4 |
Tailwind CSS
|
3 |
Google Search Console
|
2 |
Cloudflare
|
2 |
Tools most often detected on the same sites as Jac.
Recent launches we can show
2 of the 4 sites using Jac 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 The other 2 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one.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 4 sites using Jac, filterable and exportable, from £15 a month.