Companies Using Sentry

In our October 2026 crawl, Sentry's browser SDK runs on 1,966,067 domains, 1,281,536 of them matched to a company, which makes Sentry 1st of 58 in APM & Error Tracking with 70.51%. Sentry's own customers page says 4M developers at over 130K organizations use it. The first number is mostly Wix; the second is Sentry's own users. Most of what follows explains the distance between them.

1. Whose Sentry is it?

Our crawl counts Sentry wherever its SDK runs, and on most of the web Sentry's SDK belongs to a platform. On 11 October 2026, 1,152,378 of the 1,970,285 live Sentry domains also ran Wix, 58.49%. Every Wix site we opened loaded the same Sentry build, 7.120.3, through Wix's own page code.

A random sample of 30 live Sentry domains sized the rest. 18 were Wix sites; 3 more got Sentry from another platform (an author website builder, a hotel-site network and a UK school-website platform); 4 ran Sentry for themselves; 3 showed nothing and 2 didn't load. So 4 of 25 marker-bearing sites in the October 2026 sample chose Sentry themselves. A sample that small can't size the self-installed base precisely, but it rules out reading 1.97 million as Sentry's buyer count.

"Sentry's 1.97 million domains are mostly Wix's error monitoring. The Sentry buyer is the developer team behind a web app, and in our random sample that was 4 sites out of 25." - Mehmet Suleyman, CEO at TechnologyChecker.io

2. Usage since June 2026

Sentry's line goes from 1,595,599 domains in June 2026 to 1,773,540 in July, 1,851,998 in August, 1,997,888 in September and 1,966,067 in October. Two things on our side move it besides adoption: the set of domains we crawl turns over every month, with dead sites dropping out and new ones added, and our detection widens. With 58.49% of domains on Wix, Wix's own site count moves it as well. 381,250 domains dropped Sentry between 16 March 2026 and October.

Sales Signal: Don't read Sentry's 2026 domain trend as developer adoption. Filter out Wix before measuring anything about Sentry's buyers.

3. Customer profile

By count, Sentry's October 2026 base is tiny companies: 74.31% of the 1,177,169 matched companies with a known size have 1 to 10 staff, and 70.34% of those with a founding year started in 2010 or later. That's the profile of small-business Wix sites. The enterprise tail is still the largest in the category: 6,994 Sentry companies have more than 1,000 staff, against 2,611 for New Relic and 1,750 for Datadog per their profiles.

We opened all 50 companies in the list above in October 2026, and 29 showed Sentry. Apple's tv.apple.com, AT&T Business, Wells Fargo's branch locator, Emerson, Amdocs, Rabobank and Lear's e-catalog run it on their own sites. Others carry a vendor's Sentry: Ericsson's careers site reports to an Eightfold.ai endpoint, and Costco Same-Day and Publix Delivery are Instacart-built storefronts. Instacart is itself one of Sentry's published customer stories.

Sales Signal: For Sentry prospecting in 2026, keep the 28,926 companies with more than 200 staff, drop Wix sites, and check whose Sentry account a detection reports to before treating it as the company's own.

4. Industry and geography

No industry reaches 5% of Sentry's October 2026 base. Business consulting leads with 4.02%, then construction (4%), retail (3.25%) and restaurants (2.51%), and software development isn't in the top ten. That flat table is what platform distribution looks like. Developer tools show a different shape: the companies that use LogRocket put software development first at 12.36%, per the LogRocket profile.

Sentry's matched base is the most international of the three APM leaders: 61.99% sits outside the United States, against 37.26% for Datadog and 44.20% for New Relic per their profiles. The United Kingdom (9.84%), Canada (4.89%), Brazil (4.59%) and Australia (4.23%) follow the US's 38.01%.

Sales Signal: Brazil (58,878 matched companies) and Germany (45,194) are deep Sentry markets in 2026, but strip Wix first; the small-business share there is as high as anywhere.

5. Overlap, not switching

Sentry shares a large slice of its October 2026 footprint with Datadog: 60,953 domains run both right now, and 82.4% of the 73,982 that have ever run both still do. With New Relic it's 15,020 now, with 60.5% of former pairs still together; with BugSnag 4,646; with LogRocket 1,882.

Sentry's exits don't point anywhere in particular. Of the 381,250 domains that dropped Sentry since 16 March 2026, 3,363 run Datadog, 2,170 run New Relic and 1,881 run BugSnag, 7,414 in all, or 1.94%. Flows run the other way too: 5,360 domains that dropped Datadog run Sentry, and 5,114 that dropped New Relic do. None of these pairs passes our switching test, which needs no more than 40% of the former overlap still running both, so this page carries no migration table.

"Ask what companies switch to from Sentry and our 2026 data says nothing, mostly. Under 2% of the sites that dropped Sentry run a tracked rival, and most sites that tried Datadog or New Relic alongside it kept both." - Mehmet Suleyman, CEO at TechnologyChecker.io

Sales Signal: The 60,953 Sentry-plus-Datadog domains are the consolidation conversation for 2026. Sell the split between error tracking and full observability.

6. Technology ecosystem

Estimated from a 10% sample of the 1,959,700 live Sentry domains left after removing for-sale pages in October 2026, React runs on 62.47%, Cloudflare on 56.29% and Google Analytics on 40.76%. The Wix sites we checked load React from Wix's own servers next to the Sentry loader, so React's lead is mostly Wix. The developer frameworks are small: Vue.js 5.98%, Next.js 5.64%, Ruby on Rails 1.75%, Express 1.25%.

Sales Signal: In Sentry's October 2026 base, Next.js, Rails and Express sites are where Sentry is most likely a developer team's own install; start there.

7. G2 review signals and pricing

G2 reviewers praise Sentry's ease of use (21 mentions) and efficient error tracking (21); pricing (7) and expense (6) lead the complaints, with error-handling noise (6) close behind. Sentry's pricing page, checked 11 October 2026, shows a free Developer plan for one user with 5k errors, Team at $26 a month billed annually and Business at $80. The noise complaint and the event quotas meet in the same place: a noisy app burns through its error budget.

Sales Signal: For Sentry teams in 2026, quota and noise control is the opening for both Sentry upsells and rival pitches.

8. Key takeaways

1. Sentry runs on 1,966,067 domains in October 2026, 70.51% of APM & Error Tracking, about 8 times New Relic and 11 times Datadog in our category table.

2. 58.49% of live Sentry domains are Wix sites running Wix's Sentry; in a random sample, 4 of 25 marker-bearing sites ran Sentry themselves.

3. Sentry still has the category's largest enterprise tail, 6,994 companies above 1,000 staff.

4. No switching corridor: under 2% of sites that dropped Sentry run a tracked rival.

9. Sales applications

Targeting strategy: Start from the 28,926 Sentry companies with more than 200 staff in our October 2026 data, exclude Wix and other site-builder detections, and keep app, docs, careers and storefront subdomains only where the Sentry account is the company's own.

Outreach template: "We can see Sentry on [app subdomain] and Datadog on the same site. Teams running both often pay twice for front-end error data. Would a 20-minute look at which tool should own which job be useful?"

Competitive angle: Sentry's 2026 weak points in G2 reviews are price and noise. Bring an error-budget comparison against Sentry's published $26 and $80 plans.

Explore all 1,966,067 domains running Sentry and the 1,281,536 matched companies on TechnologyChecker.io.