Substack
CMS
Joomla
CMSSubstack vs Joomla (2026): Which Is Better?
Substack and Joomla are both popular choices, but they serve different needs. Substack is a CMS with a traditional, manual approach to building, while Joomla is a CMS that prioritises developer or designer control.
Below you'll find a side-by-side breakdown of detection signals, AI scores, and technical fingerprints — plus our honest take on which builder wins for different use cases.
How we detect Substack vs Joomla — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
Side-by-Side Comparison
| | |
|---|---|---|
| Category | CMS | CMS |
| AI Score | 20/100 — Traditional | 20/100 — Traditional |
| Detection Signals | 5 patterns | 7 patterns |
| Script Detection | 2 patterns | 2 patterns |
| CDN Detection | 1 domains | — |
| Header Detection | — | 1 headers |
| Sites Detected | 25 scans | 328 scans |
| Best For | Blogs & content-heavy sitesTry Substack → | Blogs & content-heavy sitesTry Joomla → |
| Official Website | Visit | Visit |
Example Websites
Substack
CMS
Substack is a cms with an AI Score of 20/100 (Traditional). Our detection engine uses 5 signal patterns to identify Substack-built sites.
Joomla
CMS
Joomla is a cms with an AI Score of 20/100 (Traditional). Our detection engine uses 7 signal patterns to identify Joomla-built sites.
Platform Overviews
Substack
Substack is a newsletter-focused content management and publishing platform used primarily by independent writers, journalists, and media creators who monetize their content through paid subscriptions. The platform has a distinct technical footprint that makes it reliably identifiable: our detection engine recognizes Substack-powered sites through a combination of 2 script patterns, 1 CDN domain, 1 HTML pattern, and 1 meta tag pattern embedded in the page source. These signals — including characteristic script references tied to Substack's CDN infrastructure and specific HTML markup and meta tag conventions consistent across all Substack publications — allow for high-confidence identification regardless of whether a site uses a custom domain. Substack operates as a fully hosted platform, meaning publishers do not manage their own server infrastructure, which keeps the technical signature highly consistent and predictable across deployments. This uniformity makes Substack one of the more straightforward CMS platforms to detect accurately, as its front-end delivery relies on centralized assets that appear on every publication regardless of custom branding or domain configuration.
Joomla
Joomla is an open-source content management system widely adopted by government agencies, educational institutions, and mid-sized organizations that require a flexible, extensible platform beyond basic blogging. AIWebsiteDetector.com identifies Joomla-powered sites through a layered set of technical signals, including 2 script patterns, 2 HTML patterns, 2 meta tag patterns, and 1 HTTP header, giving the detection engine multiple independent vectors to confirm a positive match. The HTML and meta tag patterns typically surface Joomla-specific generator tags and structural markup embedded during page rendering, while the script patterns correspond to core Joomla JavaScript assets loaded consistently across installations regardless of the active template. The HTTP header signal provides an additional layer of server-side confirmation, making it possible to detect Joomla even when front-end themes have been heavily customized or default markup has been partially obscured. Joomla is self-hosted and freely available under the GNU General Public License, meaning it can run on virtually any standard PHP and MySQL hosting stack — a deployment flexibility that contributes to its presence across a diverse range of site categories in the detection database. This architectural consistency across hosting environments is precisely what makes Joomla reliably detectable despite the wide variation in how individual sites are configured and styled.
Key Differences
- Both Substack and Joomla are classified as CMS tools, making them the most direct competitors in this comparison.
- Substack scores higher on AI involvement (20/100 vs 20/100 for Joomla), meaning it relies more heavily on AI for site generation and content creation.
- Our detection engine identifies Substack using 5 fingerprint patterns and Joomla using 7 patterns — more signals generally means more reliable detection.
Which Should You Choose?
Choose Substack if…
- You prefer a cms solution
- You want more manual control over the final output
- Substack's detection fingerprint of 5 signals means your site is reliably identifiable
Choose Joomla if…
- You need a cms approach
- You prefer traditional building tools with predictable output
- Joomla's ecosystem and community better match your team's existing workflow
Our Pick — Based on 353+ detections
Joomla
Detected 13× more often than Substack across our database of scanned sites.
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