# Subshack

> Audit any public Substack profile and discover which Notes, posts and publishing habits drive growth — without sharing your password. Free, no sign-up.

Subshack is audit and analytics for Substack writers. It scores any public Substack profile out of 100 with the specific fixes to make, and — through its Chrome extension — shows which Notes, posts and publishing habits actually brought subscribers rather than just views. It also drafts Notes and replies from the writer's own archive, but never publishes on their behalf: every suggestion lands in an editable field.

## Product
- [Home](https://www.subshack.pro/): what it does, how it works, FAQ
- [Chrome Web Store listing](https://chromewebstore.google.com/detail/johdeopkjihdkhjkjmbnnkkbdbcjinel)
- [Support](https://www.subshack.pro/support)
- [Privacy policy](https://www.subshack.pro/privacy): what leaves the device, what stays local
- [Terms of service](https://www.subshack.pro/terms): what the service does, what you own, what it does not promise

## Tools (free, no account)
- [Free Substack profile audit](https://www.subshack.pro/tools/substack-profile-audit): answers "how good is my Substack profile?" — paste a public @handle, get a score out of 100 across positioning, conversion, brand and trust, activity, and discovery, with the specific checks that failed. No account, no install, nothing published.
- [Substack subscribe-back checker](https://www.subshack.pro/tools/substack-subscribe-back-checker): answers "who did I subscribe to that did not subscribe back?" — scans a public profile's reading list and splits it into reciprocal, one-way, and publicly unverifiable (a hidden list is never counted as a refusal). Free, no account.
- [All tools](https://www.subshack.pro/tools): what each tool answers, what it scores and who it is for.

## Guides (original, long-form)
- [9 Substack Chrome extensions: which ones post as you](https://www.subshack.pro/guides/best-chrome-extensions-for-substack): Nine Substack Chrome extensions, each checked on the Chrome Web Store: what they cost, what they actually do, and which ones publish under your name.
- [Grow on Substack without subscribe-for-subscribe: 5 levers](https://www.subshack.pro/guides/grow-on-substack-without-subscribe-for-subscribe): The five levers that replaced subscribe-for-subscribe for us: original Notes, replies, cadence, a domain and search — with the numbers from a 7-day test.
- [40 Substack Notes templates that get replies (copy-paste)](https://www.subshack.pro/guides/substack-notes-templates): 40 fill-in-the-blank Substack Notes templates sorted by intent — opinion, story, question, list, promo — plus the 5 rules that make a Note get replies.
- [How to write Substack Notes that get replies](https://www.subshack.pro/guides/substack-notes-that-get-replies): The seven shapes that leave a gap readers can fill, the four parts of a Note that works, and the twenty minutes after publishing that decide the replies.
- [Substack growth strategy 2026: 4 channels, hours and payback](https://www.subshack.pro/guides/substack-growth-strategy-2026): The four channels that move a Substack in 2026 — Notes, replies, posts, search — with hours per week, time to first signal and the metric for each.
- [Subshack vs Substack Notes schedulers: which do you need?](https://www.subshack.pro/guides/subshack-vs-substack-notes-schedulers): Schedulers (WriteStack, SubflowAI…) fix when you post. Subshack measures what your Notes did and never posts. Which one fits your bottleneck?
- [Subshack vs WriteStack: which Substack extension do you need?](https://www.subshack.pro/guides/subshack-vs-writestack): WriteStack schedules Substack Notes and reports on subscriber conversion, from $23.99/mo. Subshack measures your Notes and audits your profile, free, and never posts.
- [The Substack Notes algorithm: what we know](https://www.subshack.pro/guides/substack-notes-algorithm): What Substack has stated, what is mechanically observable, and what is only folk knowledge — plus how to test the ranking claims on your own Notes.

## Blog
- [Growth experiments, with numbers](https://www.subshack.pro/blog): mirror of the newsletter https://growth.subshack.pro (canonical there)

## Optional
- [RSS feed](https://www.subshack.pro/feed.xml)
- [Sitemap](https://www.subshack.pro/sitemap.xml)