Chrome extension for Substack
Write faster. Engage smarter.
Grow on Substack.
Start with a free audit of your Substack profile. The extension fixes what it finds — drafting, replies and your own archive, inside the pages you already work in.
01Draft in minutes
Templates and briefs become a structured first pass.
02Reply with context
Suggestions that answer the actual piece you read.
03Reuse your archive
Published posts become referenceable material.
The problem
Publishing is not the hard part. The detour is.
Every post crosses five tools. Context is re-explained each time, and the writing loses momentum.
Without subshack
Notes appAI chat tabOld post archiveBack to draftWith subshack
subshack panel01Write
Turn a template into a draft that argues something.
Pick a template, give a brief, attach evidence. subshack fills the structure using your own material.
- Native Substack article templates
- Briefs, facts and objectives as input
- Draft references your published work
Template
Brief
Facts & evidence
References
Nothing is published for you
Draft · elenam.substack.com
The format trap:
why your open
rate keeps sliding
Reading
“Retention fell 18% the month we started alternating formats.”
Angle
02Engage
Reply with context, not generic comments.
Reading an article or a Note, subshack responds to what it actually argues — and mentions your work only when it fits.
- Three angles: value, reference, question
- Notes and article replies in one panel
- Multiple Note angles from a single idea
03Reuse
Your archive becomes working context.
Sync your Substack posts, then let every draft and reply pull from them under rules you define.
- Archive sync, search and tags
- Editable prompt blocks and variables
- Separate behaviour for Notes and Articles
Prompt block
Variables
Inside the extension
The same panel,
everywhere on Substack.
Switch surfaces to see what subshack shows while you write, read, post Notes and configure it.
Substack · Articles
A template, a brief, and a draft that already argues something.
Template
Brief
Facts & evidence
References
Nothing is published for you
How it works
Three steps, then
it disappears.
- 01
Install and sign in
The panel appears only on the Substack pages where it helps.
- 02
Sync your own account
Your Notes, posts and subscribers, read from the browser you are already signed in to.
- 03
See what actually worked
Which Notes brought subscribers, which just got seen, and who is worth replying to.
Why we built it
The writing stays yours.
We only remove the detour.
subshack suggests, structures and remembers. It never posts, never invents your opinion, and never speaks for you.
You write. It fetches.
Grow on Substack,
without the detour.
Original guides from building subshack in public — no subscribe-for-subscribe, no auto-posting.
- The best Chrome extensions for Substack writers (2026)Nine Substack Chrome extensions, each checked on the Chrome Web Store in August 2026 — what they cost, which ones auto-post, and the four we removed.
- Grow on Substack without subscribe-for-subscribe: 5 leversThe 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)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 repliesThe 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 paybackThe 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?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?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 knowWhat Substack has stated, what is mechanically observable, and what is only folk knowledge — plus how to test the ranking claims on your own Notes.
Questions,
answered.
- Does subshack publish anything for me?
- Never. Every suggestion lands in an editable field. You review, edit and insert it yourself.
- Does it work inside Substack?
- Yes. The panel runs on top of the Substack interface and inserts text into the editor or reply box you are already using.
- Can it use my published articles?
- Sync your archive or add URLs. Those posts become referenceable context when drafting or replying.
- Can I customize the prompts?
- Yes. Editable prompt blocks, reusable variables and reply strategies, set separately for Notes and Articles.
- Is it a Chrome extension?
- Yes. Subshack (sometimes misspelled “subhack”) installs from the Chrome Web Store and only appears on the Substack pages where it helps.