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We’ll analyze your newsletter and build a personalized growth plan.
Growth Analysis
+2,847 subscribers
AI Recommendation
Your audience engages most with personal stories. Consider opening your next post with a brief anecdote.
Live analysis
Enter your Substack to get a growth plan
We analyze your latest posts, engagement, and cadence to build a personalized strategy you can use right away.
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What you get
Built-in growth partner
AI-powered insights
We scan your posts, reactions, and comments to surface what drives growth.
Personalized strategy
Clear action items tailored to your cadence, best-performing topics, and audience behavior.
Ongoing tracking
New analyses every week so you always know what to write next.
Trusted every day by thousands of newsletter writers
Know your audience
Deep insights into who reads your work, what keeps them coming back, and how to find more people just like them.
58%
Average open rate improvement
3.2x
More subscriber growth
47%
Better content engagement
The toolkit
Everything you need,
nothing you don't
Performance Dashboard
See what's working at a glance
AI Insights
Smart recommendations
Subject Line Scorer
Write titles that get opened
Growth Playbooks
Proven strategies for your niche
Audience Map
Know who reads you
68%
US
15%
UK
17%
Other
Loved by writers
Join thousands of Substack creators who have transformed their newsletters
"SubGrow helped me identify exactly what my readers wanted. I went from 2,000 to 15,000 subscribers in 6 months."
"The AI insights were spot-on. I never realized my Tuesday posts performed so much better until SubGrow showed me the data."
"Finally, a tool that understands Substack writers. The personalized recommendations actually work."
