Sites built with Effect
TypeScript library for building typed, composable applications with built-in error handling and concurrency.
Get told when a new site ships with Effect.
Stackdar watches every launch we detect and sends you the ones using Effect, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workFound via: StackScope Discovery (Indie) 22 · StackScope Wider Web 36
Effect has been detected on 58 launches we've crawled. The 7-day rolling share is 0.0%, roughly steady week on week. Most recent detection: Weft: Reactive UI, woven from Effect, today.
By product type, the launches using it are most often Developer Tools (42%), Crypto (12%), and Education (12%).
What kind of products ship with Effect
26 launches
Domain endings using Effect
58 sites
- .com 29.31%
- .app 18.97%
- .dev 15.52%
- .xyz 6.90%
- .cloud 3.45%
- .io 3.45%
- .net 3.45%
- .online 3.45%
- .org 3.45%
Share of new sites using Effect
Each dot is one launch day. Line is the 7-day rolling average. 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.
Javascript Library leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
jQuery
|
14.20% | 34.23% |
| #2 | – |
React Router
|
6.84% | 16.48% |
| #3 | – |
Motion
|
6.78% | 16.33% |
| #4 | – |
TanStack Router
|
4.23% | 10.20% |
| #5 | – |
Swiper
|
3.60% | 8.67% |
| … | ||||
| #317 | ▼126 |
Effect
Current page
|
<0.01% | 0.01% |
Percentages show adoption among indie launches: the share of all analysed launches, and of launches using any Javascript Library tool.Among August launches it ranked #367 in Javascript Library, down from #241 in July. All 1054 in Javascript Library →
Recent launches we can show
22 of the 58 sites using Effect are product launches we list individually. The other 36 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one.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
forkd | The Source of Truth for Forks of the Source of Truth
Crypto
Masterframe
Games
(rem)ember
Content
Crease UI
gitquiet — pull request review for GitHub
Developer Tools
Human Design Feedback & Creative Testing — Taste
Site no Ar — publicação instantânea para agentes de IA
Historia: ficha clínica electrónica (EHR) para Chile y LatAm
Proselis — Book writing software for authors
Content
Stitchly: Turn any idea into thread.
Design
brief: narrated walkthroughs for the code you shipped
Developer Tools
Showing the most recent 12 of 22.
The StackScope API serves all 58 sites using Effect, filterable and exportable, from £15 a month.