Is Substack Video Downloader - Download Substack Videos & Audios Safe? — Extension Safety Profile
Quick verdict: Substack Video Downloader - Download Substack Videos & Audios earns a safety grade A, 85.4 out of 100, based on 5 of 5 dimensions.
85.4/100
Grade A · 5 of 5 checks
What we found
Automated safety profile from public signals (the extension's manifest & permissions, store listing, publisher, privacy policy). A full review hasn't been published yet.
What this safety grade means
Substack Video Downloader - Download Substack Videos & Audios earns a safety grade of A (85.4/100), measured across 5 of 5 dimensions. Its strongest area is Maintenance & Ownership (100%). The weakest is Publisher & Identity (60%) — what holds its grade back the most.
On the public records we can check, Substack Video Downloader - Download Substack Videos & Audios comes through cleanly. 2,000 active users/installs reported on the store. Store rating 5.0/5 from 29 user ratings. Last updated on the store 2026-08-29. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open Substack Video Downloader - Download Substack Videos & Audios's own store listing and privacy policy before installing, and weigh it against the other browser extensions we track below.
Safety Signals
Based on 5 of 5 safety dimensions
| Dimension | Score | Bar | Source |
|---|---|---|---|
| Publisher & Identity | 60% · 4.8/8 pts 2 of 5 checks verified | Automated signals | |
| Permissions & Access | 85% · 21.2/25 pts 3 of 3 checks verified | Automated signals | |
| Data & Privacy | 100% · 16/16 pts 4 of 5 checks verified | Automated signals | |
| Maintenance & Ownership | 100% · 7.5/7.5 pts 1 of 2 checks verified | Automated signals | |
| Community Reputation | 73% · 7.3/10 pts 2 of 4 checks verified | Automated signals |
In-depth safety analysis
This extension requests the activeTab permission to access the current page when you click its button, as well as downloads to save files and storage for local data. It also asks for identity and host access to cloud services like Dropbox, Yandex, Google APIs and a Supabase backend. This combination suggests it may offer direct cloud-saving or account integration. For a Substack video and audio downloader, the core requirement—reading the active tab and triggering downloads—is expected. The additional cloud service hosts are broader than a bare-bones downloader, but they could be present to enable optional cloud storage uploads.
In general, downloader extensions can see the content of the page you activate them on, so you should only use them on sites you already trust. This developer has declared that data is not sold or used for unrelated purposes, and the extension earned a 100% score for data privacy in the fact sheet. However, the publisher’s identity score is lower (60%), meaning there is less publicly verified background about Neo Cortex LLC. A careful user may want to look into the publisher before installing.
The extension’s strongest dimension is maintenance and ownership (100%), indicating it is actively maintained. Combined with a solid overall Grade A and a clean privacy disclosure, this suggests a tool that is kept up to date, even if the developer’s identity is less transparent. Users weighing these factors can make an informed choice based on their comfort with the requested capabilities.
AI-assisted analysis of the documented signals above (permissions, store data, privacy practices) — explains what they mean and the risks typical for this category. Not a hands-on test.
What the store listing shows
Who's Behind Substack Video Downloader - Download Substack Videos & Audios?
- Publisher Neo Cortex LLC
Public records identify the publisher, but no individual founders or a separate registered company are named — which is what holds the Publisher & Identity score back. Less public information about who operates an extension means less you can verify about their long-term accountability.
How it compares
Among the 838 browser extensions we track, Substack Video Downloader - Download Substack Videos & Audios scores higher on safety than 85% of them.
Computed from our own database of assessed browser extensions — updated as we track more.
Evidence on File (12)
Substack Video Downloader - Download Substack Videos & Audios FAQ
- Is Substack Video Downloader - Download Substack Videos & Audios safe?
- Substack Video Downloader - Download Substack Videos & Audios earns a safety grade of A (85.4/100) on our evidence-based assessment, based on 5 of 5 safety dimensions we could verify from public records. This is an automated profile built from public records, not a hands-on review.
- Who is behind Substack Video Downloader - Download Substack Videos & Audios?
- Substack Video Downloader - Download Substack Videos & Audios is operated by Neo Cortex LLC.
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