What powers 
testdouble.com?
Last seen Aug 2026 · 22 technologies across 11 categories
Analytics
CDN
JavaScript libraries
Miscellaneous
PaaS
Page builders
Programming languages
Security
Static site generator
Web servers
Webmail
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt found
- ai.txt not found
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| beos | #3 | 190 |
| be operating system | #3 | 160 |
| test double | #1 | 36 |
| react mvc pattern | #2 | 23 |
| react model-view-controller | #2 | 23 |
| react and mvc | #3 | 14 |
| capex vs opex | #56 | 13 |
| test double | #3 | 11 |
| rails world 2025 | #4 | 9 |
| kamal-proxy | #3 | 7 |
| 10x programmer | #12 | 7 |
| technical talk | #16 | 6 |
| react-native-linking | #8 | 6 |
| mui graphs | #4 | 6 |
| uninstall postgres | #5 | 5 |
| uninstall homebrew | #14 | 5 |
| roc language | #7 | 5 |
| beos os | #5 | 4 |
| bike shedding | #18 | 4 |
| bikeshedding | #40 | 4 |
| command line tools | #81 | 4 |
| react mvc | #3 | 4 |
| ruby on rails upgrade service | #3 | 4 |
| playwright auth | #7 | 4 |
| how to uninstall homebrew | #11 | 4 |
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.
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 74% desktop
- 26% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.68 / 10 · ranked #138,176 of all domains
244 referring domains · OpenPageRank
Search traffic
680 est. monthly organic visits (US)
481 keywords in Google's top 30
Core Web Vitals
| LCP | 1.1 s |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 2.4 MB · 56 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Cloudflare (198.202.211.1)
- DNS: dnsimple-edge.com
- Email: Google Workspace
- Email security: no SPF record, no DMARC record, DNSSEC signed
- SSL: Google Trust Services, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 1,072,481, 6 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| testdouble.com | 17 |
| blog.testdouble.com | 10 |
Full technology history →
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Recent changes
- dropped core-js Jan 2026