Substackulous promises 500% subscriber growth and a 347% average growth rate. WriteStack promises a scheduler, real analytics, and AI that sounds like you. One of these can actually be verified.
WriteStack is a Substack growth platform: scheduling, analytics, AI writing in your voice, an engagement center, and a Follows feed. Substackulous is an AI content tool with bold claims — 500% growth, 347% average subscriber increase, $4,300/mo revenue boost — none of which come with sources, methodology, or any way to verify them. This page compares what both tools actually do.
WriteStack
28/28
features
Substackulous
2/28
features
Substackulous does have a few genuinely useful tools: a thumbnail generator, an AI writing assistant for Substack content, and a viral Notes generator. If you primarily need help creating content from scratch and don't care about scheduling, analytics, or engagement tools, it has some value there.
Their 14-day free trial and starter credits let you test before paying. That's fair. The product itself is real — the claims about it are not.
Scroll through the table — column headers stay pinned so you always know which product is which.
| Feature | WriteStackVerified features | SubstackulousUnverified claims |
|---|---|---|
| ⚠ Claims & Credibility | ||
| Verifiable growth stats with real data | Substackulous claims 347% growth, 500% subscriber boost, $4,300/mo revenue increase — with zero sources, zero methodology, zero proof | |
| Real testimonials you can verify | The same testimonial text appears twice on their page with different names attached | |
| Working product pages & links | Every footer link on their site points to "#" — About, Blog, Careers, Features, Analytics | |
| Scheduling | ||
| Schedule Substack Notes | Substackulous has no scheduling feature | |
| Visual posting calendar | ||
| Heatmap of posting habits | ||
| Bulk-schedule 100+ Notes at once | ||
| Personalized optimal time suggestions | ||
| Uses Substack's native scheduling (ToS safe) | ||
| AI & Content Creation | ||
| AI Note generation in your voice | Substackulous uses generic AI not trained on your writing | |
| Generate Notes from your articles & files | ||
| Tone-matched rewrites & variations | ||
| AI chat with your Substack context | ||
| Built-in web research | ||
| Unlimited usage (no credits system) | Substackulous runs on a credits system — 2,500/mo on Pro. Use it up and you stop | |
| Analytics | ||
| Notes performance dashboard | ||
| Subscriber conversion tracking per Note | Substackulous claims analytics but no evidence of per-Note subscriber tracking | |
| Format & timing breakdown | ||
| Growth correlation graphs | ||
| Engagement & Community | ||
| Unified Activity Center (notifications) | ||
| Keyboard shortcuts for replies | ||
| Auto-like on reply | ||
| Search millions of Notes in your niche | ||
| Follow & curate a creator listNEW | ||
| Personalized Following feedNEW | ||
| Power Users & Teams | ||
| Multiple client seats / ghostwriter mode | ||
| Chrome extension for publishing | ||
| Privacy-first local publishing | ||
Ready to see it in action?
Start your free 7-day trial →Substackulous claims 347% average subscriber growth in 6 months, 500% subscriber boosts, $4,300/mo average revenue increases, 83% less time on content, and 5x higher engagement rates. There is no source for any of these. No methodology, no sample size, no date range, no third-party verification. They are marketing numbers, invented to impress.
WriteStack shows you real numbers: which of your Notes drove subscriber conversions, what formats perform, when your audience engages. Numbers you can see, from your own account, that you can actually act on.
Per-Note conversion data
See exactly which Notes brought new subscribers to your publication
Your numbers, not averages
Real data from your account — not aggregate claims with no source
Actionable, not decorative
Know what to repeat, what to drop, and when to post
Features that exist, work, and can be verified.
WriteStack tells you which specific Notes drove subscriber conversions — actual data from your actual account. Not "up to 347%" growth claims with no methodology attached.
Substackulous has no scheduling feature at all. WriteStack lets you bulk-schedule a full week of Notes in one sitting, using Substack's native infrastructure.
Substackulous generates generic AI content. WriteStack's AI is trained on your writing — your voice, your tone, your style. The output doesn't need a full rewrite before you publish it.
The Activity Center handles all your Substack notifications in one place — replies, restacks, new subscribers. Keyboard shortcuts. Auto-like on reply. None of this exists in Substackulous.
Substackulous runs on a 2,500 credits/month cap on their $47 plan. Use it up and you're done. WriteStack doesn't throttle you based on usage.
Write and schedule Notes for multiple clients from one account. Substackulous has no team or multi-publication support.
Ready to see it in action?
Get started free →Real writers. Real publications. You can look them up.
"My new subscribers growth rate doubled ever since. It saves me hours of posting manually."
Yana G.Y.
Unplugged by Yana G.Y.
"It's a great product and easy to use. Right now it's the only Substack scheduler there is."
Tim Denning
Unfiltered
"The Notes analytics alone are a game-changer — actual data showing which posts convert to subscribers."
Dino | The Art of Purpose
masterclass247.com
Substackulous makes impressive claims that go unverified, has duplicate testimonials, and footer links that go nowhere. WriteStack ships scheduling, real analytics, and AI that sounds like you — and lets your own data tell the story. If you're serious about Substack, the choice is obvious.
Real growth.
Schedule Notes, track what converts, follow creators you care about, and generate content in your voice — free for 7 days.