Substack
CMS
Webflow CMS
CMSSubstack vs Webflow CMS
Substack and Webflow CMS are both popular choices, but they serve different needs. Substack is a CMS with a traditional, manual approach to building, while Webflow CMS 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.
Side-by-Side Comparison
| | |
|---|---|---|
| Category | CMS | CMS |
| AI Score | 20/100 — Traditional | 20/100 — Traditional |
| Detection Signals | 5 patterns | 4 patterns |
| Script Detection | 2 patterns | — |
| CDN Detection | 1 domains | 1 domains |
| Header Detection | — | — |
| Sites Detected | 4 scans | No data yet |
| Best For | Blogs & content-heavy sitesTry Substack → | Blogs & content-heavy sitesTry Webflow CMS → |
| Official Website | Visit | Visit |
Example Websites
Substack websites
Webflow CMS 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.
Webflow CMS
CMS
Webflow CMS is a cms with an AI Score of 20/100 (Traditional). Our detection engine uses 4 signal patterns to identify Webflow CMS-built sites.
Platform Overviews
Substack
Substack is the largest and most influential newsletter and subscription platform, hosting hundreds of the world's top writers, journalists, and independent media outlets — including publications that have generated millions in annual subscriber revenue. It pioneered the paid newsletter model with simple 10% revenue sharing, a writer-friendly setup experience, and a built-in discovery network. Substack Recommendations has become a major growth channel, with reader suggestions driving new subscriber acquisition. Substack sites are identifiable through resources loaded from substackcdn.com for media and assets, the Substack JavaScript runtime on all publication pages, and distinctive *.substack.com subdomain patterns. Custom domain sites still load all media through substackcdn.com, making it a reliable detection signal. The platform is free to use with Substack taking 10% of paid subscription revenue.
Webflow CMS
Webflow CMS is Webflow's integrated content management system for building dynamic, data-driven websites — enabling teams to define custom content types (Collections) and have editors add content through a structured interface while developers control the visual presentation. Unlike headless CMS platforms, Webflow CMS is tightly coupled to the Webflow visual editor, meaning the data and the design live in the same system. It powers dynamic blogs, portfolio galleries, job boards, and event listings on Webflow sites. CMS-powered Webflow pages are identifiable through w-dyn-item class names on individual collection items and w-dyn-list on collection list containers — these are injected by Webflow's CMS rendering engine and appear consistently across all CMS-powered Webflow sites.
Key Differences
- Both Substack and Webflow CMS 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 Webflow CMS), meaning it relies more heavily on AI for site generation and content creation.
- Our detection engine identifies Substack using 5 fingerprint patterns and Webflow CMS using 4 patterns — more signals generally means more reliable detection.
- Substack serves assets from
/substackcdn\.com/iwhile Webflow CMS uses/webflow\.com\/assets/i— making CDN domain analysis one of the most reliable ways to distinguish them.
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 Webflow CMS if…
- You need a cms approach
- You prefer traditional building tools with predictable output
- Webflow CMS's ecosystem and community better match your team's existing workflow
Our Pick — Based on 4+ detections
Substack
The most frequently detected cms in our scan database.
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