Subshack — Substack stats & profile audit

See how your Substack Notes and articles actually perform, and score any Substack profile out of 100. Nothing is posted.

Subshack turns your own Substack numbers into something you can act on, and audits any public Substack profile. It reads only your own account, using the session you are already signed in with. Subshack never posts, follows or likes on your behalf. Private messages are the one exception, and only if you turn them on: Subshack drafts replies to your Substack inbox for you to read and send. There is an optional automatic mode you must enable yourself — it sends the reply for you, after a delay you set, inside your quiet hours and under a daily cap you set. It is off until you choose it. WHAT IT DOES • Notes & post stats — sync your own Notes and published posts: impressions, new subscribers, opens, clicks and traffic sources, collected in one place instead of being clicked through one by one. • Growth intelligence — what works for you and why: your best-performing Notes, formats and hours, computed from your own data. • Profile audit — score any public Substack profile against a checklist (bio, publication, links, recent activity) and get concrete fixes. Same engine as the web tool at subshack.pro/tools. • CSV export — take your Notes and subscriber figures out whenever you want. WHERE YOUR DATA LIVES • Everything stays on your device (Chrome local storage). No account, no sign-up, no password. Your Substack session never leaves your browser: Subshack reads your account from the browser you are already signed in with, and stores no session. • Anonymous, no-PII usage analytics help us improve the extension. Full policy: https://www.subshack.pro/privacy