Guide · 7 min read · Updated Aug 25, 2026
Subshack vs Substack Notes schedulers: which do you need?
They look like the same category — “Chrome extension for Substack Notes” — but they solve opposite problems. Schedulers fix when you post. Subshack fixes what you post. Here is how to choose, honestly.
If you search "Substack Notes Chrome extension" you get two kinds of tools sitting next to each other as if they competed: schedulers — WriteStack, SubflowAI, Substack Note Scheduler, NotePilot — and Subshack. They do not compete. They solve opposite halves of the same problem, and picking the wrong half is how people end up with a queue full of Notes nobody replies to.
This is our honest side-by-side. We build Subshack, so read the scheduler descriptions as "from their public listings" and our own as "from the inside".
The one-line difference
- A scheduler fixes when you post. You write ahead, it publishes on a timetable, sometimes with AI-generated Notes to fill the gaps.
- Subshack tells you what happened. It reports how your Notes and articles performed, scores your public profile out of 100, and answers questions about your own numbers. It never publishes.
If your bottleneck is timing and consistency, you want a scheduler. If you cannot name which of your last ten Notes worked, you want Subshack first — scheduling more of the wrong shape only makes it punctual. If it is both, run both; they touch different steps.
Side by side
| Subshack | Notes schedulers (WriteStack, SubflowAI, Substack Note Scheduler…) | |
|---|---|---|
| Core job | Measure Notes and articles, audit your profile | Queue and auto-post Notes |
| Where it lives | A panel on Substack, plus a web report | Mostly the Notes composer / a queue view |
| Posts on your behalf | Never | Yes — that is the point |
| Uses your archive | Yes — synced posts and Notes are what it measures | Some report on what they queued |
| Replies | Counts them, so you can see which shapes earned them | Not the focus |
| Article editor | Reports article performance | Not the focus |
| AI generation | An assistant that answers questions about your data, not a Note writer | Most offer AI Note generation into the queue |
| Automation risk | Low — you are the last step | Low for scheduling your own Notes; higher if bundled with auto-follow / bulk DM |
| Best for | Writers who cannot tell which Notes worked | Writers who batch content and post at fixed times |
What Subshack does, concretely
Three surfaces, one panel:
- Stats. How every Note and article actually performed — reach, replies, restacks — so you can name your best Note of last month without guessing.
- Profile audit. Your public profile scored out of 100 across five axes (positioning, conversion, brand & trust, activity, SEO), with the weakest one named. It also runs on the web, with no account and no extension.
- Audience. Who reads you, who keeps coming back, and who has gone quiet.
There is an AI assistant, but it answers questions about your own numbers — "which Note performed best, and why", "who are my most loyal readers", "what day should I publish on" — rather than writing Notes for you.
What it deliberately does not do: publish, schedule, follow, DM, or reply on your behalf. If you need auto-posting, a scheduler is the right tool for you — and that is fine.
What the schedulers do, concretely
From their Chrome Web Store listings and vendor sites, checked 25 August 2026:
- WriteStack — the most installed of the category (~1,000 users). Batch scheduling, a swipe file, AI note suggestions trained on your published work, and analytics on which Notes converted subscribers. Publishes from your browser, so Chrome has to be open when a Note is due. From $23.99/month, no free plan. It is the one most often compared with us, so it has its own page: Subshack vs WriteStack.
- SubflowAI — schedules server-side, so your Notes go out with the laptop closed. Turns a long post into a batch of Note variations, and exposes an MCP server for Claude and ChatGPT. $9.97.
- Substack Note Scheduler — the plain queue, ~436 users, no analytics and no published price. Note the name collision: a second, unrelated extension uses the same name.
- NotePilot — scheduler, bookmarks and a basic analytics panel, but last updated in February 2026, which is a long time on a surface that changes as often as Substack's.
They are good at what they do. The failure mode is not the tool; it is filling the queue with Notes written to fill a queue. A schedule of generic Notes is a very reliable way to be ignored on time.
Which one do you need? Four questions
- Can you name your best Note of last month? If yes and the problem is remembering to come back tomorrow → scheduler. If you have no idea which one it was → Subshack first: you cannot improve a queue you cannot read.
- Do your Notes get replies? If you do not know, that is the answer → Subshack counts them per Note, and reply rate is the metric schedulers do not report.
- Is your public profile the problem? A reader lands on your profile before they read a Note → the Subshack audit scores exactly that surface. Schedulers are Notes-only.
- Are you tempted by follow / DM automation? If yes, please read how to grow without subscribe-for-subscribe first. Automated reciprocity is the fastest way to a list that does not open.
Using both
Perfectly reasonable — a workflow that makes sense:
- Monday: read last week's stats and run the profile audit in Subshack. Note the two shapes that earned replies.
- Write in those shapes and load the week into your scheduler.
- Friday: check what actually went out and what it did. Keep what worked, drop what did not.
They do not conflict; they do not even see each other.
Price, permissions, privacy
- Permissions. Any of these needs access to
substack.com(and your custom domain, if you use one). Be suspicious of "all sites". - Privacy. Anything with AI sends text to a model provider. Subshack's privacy policy says exactly what leaves your device and what stays local — expect the same clarity from any tool you install.
- Price. Changes too often to print here. Check the store listings; ours is on the Chrome Web Store.
The short version
Schedulers make you consistent. Subshack makes you specific. Consistency without specificity is a queue of Notes that get scrolled; specificity without consistency is a great Note once a fortnight. Pick the one that fixes your actual bottleneck — and if you are not sure which that is, look at your last ten Notes: were they late, or were they generic? If neither answer feels obvious, the free Substack profile audit scores your public profile out of 100 and points at the weakest axis — a faster diagnosis than installing both and finding out.
More on the category in the best Chrome extensions for Substack writers. And if the honest answer is "my Notes are generic", start with how to write Notes that get replies before you install anything — the tool cannot supply the specific.
Frequently asked
- Does Subshack schedule Notes?
- No, and it never will — that is a product decision. Subshack reports how your Notes and articles performed and scores your public profile out of 100. If you need Notes to go out while you are away from the keyboard, you need a scheduler such as WriteStack or SubflowAI.
- Can I use Subshack together with a scheduler?
- Yes. Read last week in Subshack, write more of whatever earned replies, and load that into your scheduler’s queue. They touch different steps of the workflow and do not conflict.
- Is auto-posting risky on Substack?
- Substack’s terms restrict automated behaviour that looks like spam. Scheduling a Note you wrote is low-risk; bulk auto-following, mass DMs and generic AI replies are the patterns that get accounts flagged and readers annoyed.
Subshack shows how your Substack Notes and articles actually performed, and scores any profile out of 100. Free, and it never posts for you.
Get subshack on the Chrome Web Store