Sentry
Sentry is an application monitoring service that captures errors, crashes and performance data from web, mobile and back-end code and alerts the developers responsible. It is offered as a hosted service or a self-hosted installation.
A website that loads the Sentry browser SDK is run by a team that writes its own code: SaaS companies, marketplaces, fintech and media products, agencies that ship custom front-ends and the engineering departments of larger companies, rarely template sites or hosted builders. Its presence marks a technical organisation with developers on staff, a release process and a budget for engineering tools.
The list is bought by vendors of developer and infrastructure tools: logging and observability platforms, feature-flag and deployment services, session replay and product analytics, uptime monitoring, security scanning, CI/CD and cloud cost tools, and technical recruiting firms. New Sentry sites are products approaching or just past launch, when tooling budgets are being set; dropped sites have moved to a competing monitoring service or merged their front-end into another product.
Sentry is installed on 422,642 websites, which is 82% of all Issue trackers detections we record. Websites monitored with Sentry are most often served from United States (46,312), Germany (7,435) and India (4,344), and .com, .org and .net are the most common domain endings. The most common versions are 5.4.3 (7,762 sites) and 7.15.0 (2,171).
Websites using Sentry
Preview filters with coarse ranges. Exact ranks and registration dates are available in the dashboard when you download a list.
422,642 websites. Sign in to download the full list (free sample below, full lists from $69/mo)
25 days ago 87 websites used Sentry; today it is 422,642 (+485695.4%).
Top countries for Sentry
Top TLDs
Sentry versions in use
Sample of 15 websites using Sentry
best-ranked first; the full list has 422,642| Domain | Country | Majestic rank | NetAPI rank | Contacts | First seen |
|---|---|---|---|---|---|
| savefrom.net | - | 4,937 | 259 | 2026-10-14 | |
| coursera.org | US | 418 | 1,136 | 2026-10-11 | |
| mixpanel.com | US | 3,600 | 1,709 | 2026-10-11 | |
| foreignpolicy.com | - | 1,253 | 2,317 | 2026-10-13 | |
| adweek.com | - | 1,318 | 2,423 | phone | 2026-10-15 |
| zalando.de | DE | 14,579 | 3,468 | 2026-10-15 | |
| bhaskar.com | US | 19,333 | 3,736 | phone | 2026-10-14 |
| commonlit.org | - | 62,606 | 4,094 | 2026-10-13 | |
| kamigame.jp | US | 364,953 | 5,147 | 2026-10-13 | |
| olxomg.com | - | - | 6,280 | 2026-10-12 | |
| tradedoubler.com | - | 2,614 | 6,676 | phone | 2026-10-08 |
| visualwebsiteoptimizer.com | - | 146,300 | 7,238 | phone | 2026-10-16 |
| qt.io | US | 3,907 | 7,652 | 2026-10-13 | |
| spectator.com | US | 3,727 | 7,653 | 2026-10-17 | |
| veeam.com | DE | 3,691 | 7,774 | phone | 2026-10-08 |
Websites that started using Sentry in the last 30 days
sample of 15; the full list has 422,642Period:last 7 dayslast 14 dayslast 30 dayslast 60 dayslast 90 days
| Domain | Country | Majestic rank | NetAPI rank | Contacts | First seen |
|---|---|---|---|---|---|
| savefrom.net | - | 4,937 | 259 | 2026-10-14 | |
| coursera.org | US | 418 | 1,136 | 2026-10-11 | |
| mixpanel.com | US | 3,600 | 1,709 | 2026-10-11 | |
| foreignpolicy.com | - | 1,253 | 2,317 | 2026-10-13 | |
| adweek.com | - | 1,318 | 2,423 | phone | 2026-10-15 |
| zalando.de | DE | 14,579 | 3,468 | 2026-10-15 | |
| bhaskar.com | US | 19,333 | 3,736 | phone | 2026-10-14 |
| commonlit.org | - | 62,606 | 4,094 | 2026-10-13 | |
| kamigame.jp | US | 364,953 | 5,147 | 2026-10-13 | |
| olxomg.com | - | - | 6,280 | 2026-10-12 | |
| tradedoubler.com | - | 2,614 | 6,676 | phone | 2026-10-08 |
| visualwebsiteoptimizer.com | - | 146,300 | 7,238 | phone | 2026-10-16 |
| qt.io | US | 3,907 | 7,652 | 2026-10-13 | |
| spectator.com | US | 3,727 | 7,653 | 2026-10-17 | |
| veeam.com | DE | 3,691 | 7,774 | phone | 2026-10-08 |
Websites that stopped using Sentry in the last 30 days
sample of 15; the full list has 4,991,437Period:last 7 dayslast 14 dayslast 30 dayslast 60 dayslast 90 days
| Domain | Country | Majestic rank | NetAPI rank | Contacts | Dropped |
|---|---|---|---|---|---|
| dmac-solutions.net | - | - | 489 | email phone | 2026-10-31 |
| wix.com | US | 248 | 1,013 | 2026-10-24 | |
| max.com | DE | 10,141 | 1,369 | phone | 2026-10-27 |
| thenextweb.com | - | 1,019 | 1,988 | 2026-10-25 | |
| hbomax.com | DE | 2,727 | 2,175 | phone | 2026-10-30 |
| impact.com | - | 1,772 | 2,705 | phone | 2026-10-28 |
| expiredwixdomain.com | - | 1,741 | 3,172 | 2026-10-29 | |
| wiki.gg | - | 20,314 | 3,658 | phone | 2026-10-28 |
| prodigygame.com | US | 19,556 | 3,685 | 2026-10-26 | |
| zalando.nl | DE | 56,689 | 4,343 | 2026-10-27 | |
| zalando.fr | DE | 58,109 | 4,389 | 2026-10-27 | |
| zalando.it | DE | 79,506 | 4,459 | 2026-10-31 | |
| zalando.es | DE | 121,799 | 4,534 | 2026-10-31 | |
| zalando.pl | DE | 146,029 | 4,720 | 2026-10-28 | |
| ukrainealarm.com | US | 537,280 | 4,903 | 2026-10-26 |
Often used together with Sentry
Questions about Sentry websites
How many websites use Sentry?
As of November 2, 2026, 422,642 websites load the Sentry client on their homepage. The number is recalculated every night from our own crawl of the web.
Who buys lists of websites using Sentry?
Vendors of monitoring, logging, performance and security tools, developer platforms and consultancies. A website that ships an error-monitoring client has an in-house or contracted engineering team and a product that changes often; one that just added Sentry is maturing its operations, one that dropped it has switched tools.
Where are Sentry websites hosted?
United States leads with 46,312 websites, followed by Germany (7,435) and India (4,344). The country is where the website is served from; sites on a hosted platform show the platform's country.
How do I find websites that just added Sentry?
The New tab on this page lists websites where our crawler saw Sentry for the first time in the last days, newest first; the Dropped tab lists the sites that removed it. Both download with a subscription and refresh every morning.
How do I get a list of websites using Sentry?
A free BetaScan account downloads a {sample_rows}-row sample. A subscription from $69 a month gives the full list of 422,642 domains, or a dataset with emails, phones, country, hosting and ranks, filtered by country, TLD, rank and registration date. See pricing.
How does BetaScan detect Sentry?
Our crawler fetches the homepage of every domain we track and matches the page and its response headers against the signatures of 7,636 technologies. A website counts as using Sentry when its latest crawl shows the signature; when the signature disappears, the site moves to the dropped list.
How can you tell a website uses Sentry?
The homepage loads the browser SDK from browser.sentry-cdn.com or bundles it and calls Sentry.init with a DSN that points to ingest.sentry.io or a self-hosted address. The SDK also creates a global window.__SENTRY__ object and adds a sentry-trace header or meta tag when performance tracing is on. Sites that embed the loader script carry a js.sentry-cdn.com URL with a public key. Our crawler matches these in the page source.
What can you sell to Sentry users?
These are engineering-led companies, so the list suits vendors of logging, tracing and observability tools, session replay and product analytics, feature flags, CI/CD and release tooling, cloud hosting and cost management, application security scanning, incident management and on-call software, and developer recruiting. Decision makers are CTOs and engineering leads rather than marketing staff.
Is Sentry used by large companies or small ones?
Both, with a tilt towards startups and mid-sized software companies. The free and team plans make it a default choice for small engineering teams, while large enterprises use the business plan or a self-hosted instance. The traffic-rank filter in the dataset separates the segments; a high rank with Sentry usually means a product company with a sizeable engineering organisation.