Sites using Istanbul
JavaScript code coverage instrumentation tool used with test runners such as Mocha, Jest and Karma.
23 sites
22 found by StackScope, 1 via launch platforms
- StackScope Wider Web 20
- StackScope Discovery (Indie) 2
- Product Hunt 1
Istanbul has been detected on 23 launches we've crawled, with 6 of those in September 2026 (0.0% of the month's launches so far). Most recent detection: Fallow, yesterday.
It's most commonly paired with HSTS, Stripe, and Squarespace.
Domain endings using Istanbul
23 sites
- .com 52.17%
- .me 30.43%
- .ai 4.35%
- .app 4.35%
- .nz 4.35%
- .tools 4.35%
Share of new sites using Istanbul
Each dot is one launch day. Line is the 7-day rolling average. Chart starts at first detection.
Developer Tools leaders
| Tool | % of launches | % of category | ||
|---|---|---|---|---|
| #1 | – |
Vite
|
22.50% | 97.10% |
| #2 | – |
Rspack
|
0.36% | 1.56% |
| #3 | ▲1 |
pywb (Wayback Machine toolkit)
|
0.09% | 0.41% |
| #4 | ▼1 |
SheetJS
|
0.07% | 0.31% |
| #5 | – |
Weglot
|
0.06% | 0.24% |
| … | ||||
| #67 | ▲65 | Istanbul 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 August launches it ranked #46 in Developer Tools, up from #111 in July. All 381 in Developer Tools →
Often used with
| Tool | Sites |
|---|---|
| HSTS | 20 |
Stripe
|
16 |
Squarespace
|
15 |
Apache
|
15 |
PHP
|
15 |
Tools most often detected on the same sites as Istanbul.
Recent launches we can show
3 of the 23 sites using Istanbul are product launches we list individually. The other 20 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one.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
Fallow
Developer Tools
Camille – AI Personal Shopper for Shopify | Pinci
E-commerce
Vontra — quoting, invoicing & business management for UK tradespeople
The StackScope API serves all 23 sites using Istanbul, filterable and exportable, from £15 a month.