Application error tracking and performance monitoring for frontend and backend code.
271,296 sites
265,933 found by StackScope, 5,363 via launch platforms
- StackScope Wider Web 243,902
- StackScope Discovery (Indie) 22,031
- Product Hunt 3,973
- Other 523
- PeerPush 521
- Hacker News 346
About 1 in 25 websites that went live in the last 30 days use Sentry (4.4%).
These figures cover websites that went live since April 2026, not the web as a whole.
Get told when a new site ships with Sentry.
82,778 new sites with Sentry first seen in the last 30 days.
Stackdar watches every launch we detect and sends you the ones using Sentry, by email, Slack or webhook. On every plan, from £15 a month.
See how alerts workShare of new sites using Sentry
Each dot is one launch day. Line is the 7-day rolling average; weekly averages before July 2026.
The shaded areas were measured against a different set of sites, so the line can step there without Sentry itself changing.
Coverage details
Before the dashed line where the dots begin, the line is a weekly average. After it, the last 90 days are shown one day at a time.
Grey: before 8 July 2026, we only tracked launches from launch platforms. From that date we crawl the wider web as well.
Amber: 8 July to 10 September 2026, before we improved our infrastructure to 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 10 September. We record each site as it was when we found it.
The share is a proportion of whatever we were tracking at the time. For a single continuous measure, switch to launch platforms.
What kind of sites use Sentry
69,184 sites with a known type, all time
Domain endings using Sentry
271,078 sites, all time
- .com 66.9%
- .uk 4.1%
- .org 3.8%
- .ca 3.0%
- .net 2.9%
- .co 2.3%
- .app 2.2%
- .fr 1.9%
- .store 1.6%
- .in 1.5%
- .online 1.2%
- .ai 1.0%
- .io 0.8%
- .ch 0.7%
- .au 0.6%
Country
Country likely for 45,929 of 271,296 sites (16.9%), all time.
How we know
Country comes from what each site says about itself, such as a company registration, legal terms or a phone number, not just its domain ending. Too few sites state their country plainly for the usual count, so this one also counts single signals: a country domain ending, a phone number (for North America, its area code), a location the site declares in its own page metadata, or a country-specific vendor stack and the page language where they agree and nothing contradicts them. Read these as likely rather than certain.
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United Kingdom 23.1%
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United States 15.6%
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Canada 12.3%
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France 12.1%
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India 7.2%
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Switzerland 3.8%
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Australia 3.8%
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South Korea 3.1%
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Brazil 2.9%
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Sweden 2.5%
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Germany 1.6%
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New Zealand 1.4%
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Japan 1.3%
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Türkiye 0.8%
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Mexico 0.7%
Green hosting
5,362 checked sites since Apr 2026.
What this means
The share whose web host The Green Web Foundation lists as running on green energy, against the average for every new site we checked.
- Sentry 39%
- Average 47%
Error Tracking leaders
| Tool | % of sitesall time | % of categoryall time | ||
|---|---|---|---|---|
| #1 | – |
|
4.7% | 96.7% |
| #2 | – |
|
0.1% | 2.0% |
| #3 | – |
|
0.1% | 1.3% |
| #4 | – |
|
<0.1% | 0.9% |
| #5 | ▼1 |
|
<0.1% | 0.2% |
Percentages show all-time adoption across the new sites we track: the share of all of them, and of the sites using any Error Tracking tool. All 34 in Error Tracking →
Recent launches using Sentry
27,394 of the 271,296 sites using Sentry are product launches we list individually. The other 243,902 are sites we found crawling the wider web: they count towards the figures above, but we do not publish them one by one. They are included in the StackScope API and in Stackdar alerts. How StackScope Discovery works
Showing the most recent 12 of 27,394.
The StackScope API serves all 271,296 sites using Sentry, filterable and exportable, from £15 a month.