What powers rollbar.com?
Last seen Jun 2026 · 78 technologies across 30 categories
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Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| python except exception | #4 | 270 |
| cannot read property of undefined | #3 | 130 |
| java web app framework | #1 | 120 |
| cannot find symbol java | #2 | 120 |
| java cannot find symbol | #2 | 120 |
| java cannot find symbol | #2 | 120 |
| python throw exception | #4 | 94 |
| throw an exception python | #5 | 89 |
| nonetype object is not subscriptable | #3 | 86 |
| cannot unpack non-iterable nonetype object | #2 | 78 |
| could not find or load main class main | #2 | 78 |
| could not find or load main class | #2 | 78 |
| java io exceptions | #4 | 66 |
| indexerror: list assignment index out of range | #1 | 64 |
| typeerror: cannot unpack non-iterable nonetype object | #2 | 63 |
| java identifier expected | #2 | 63 |
| identifier expected java | #2 | 63 |
| java exception hierarchy | #1 | 60 |
| null is not an object | #2 | 59 |
| java illegalargumentexception | #3 | 57 |
| try and catch python | #9 | 54 |
| python indexerror: list index out of range | #2 | 52 |
| python indexerror list index out of range | #2 | 52 |
| java exception class | #2 | 52 |
| illegal start of expression java | #2 | 52 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 98% desktop
- 2% phone
United States
United Kingdom
Canada
Spain
Netherlands
Poland
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.44 / 10 · ranked #20,630 of all domains
832 referring domains · OpenPageRank
Search traffic
8,000 est. monthly organic visits (US)
3,404 keywords in Google's top 30
Core Web Vitals
| LCP | 2.2 s |
| INP | 50 ms |
| CLS | 0.05 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- CDN: Cloudflare, Google
- Weight: 1.4 MB · 69 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| try.rollbar.com | 46 |
| www.rollbar.com | 36 |
| app.rollbar.com | 24 |
| docs.rollbar.com | 21 |
| status.rollbar.com | 18 |
| rollbar.com | 15 |
| api.rollbar.com | 9 |
Full technology history →
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Recent changes
- dropped Google Cloud Trace May 2026
- detected Turbopack Apr 2026
- detected Framer Sites Oct 2025
- detected Google Font API Oct 2025