Grow Your Substack Faster With Data, Not Guesswork
Paste any Substack article and instantly discover why it works, where to promote it, what topics to write next, and how to attract more subscribers.
Publishing Isn't The Hard Part. Getting Readers Is.
You publish an article and nobody sees it.
You don't know where to promote it.
You don't know which topics are worth writing about.
You don't know if your article is SEO optimized.
You don't know what to do after hitting publish.
One Workspace For Article Growth
Stak helps Substack and Medium writers grow articles through SEO optimization, distribution discovery, content research, and growth planning.
Everything You Need To Grow Your Substack
From article analysis to distribution strategy, get data-driven insights to attract more subscribers.
Article Analyzer
Analyze successful Substack articles and uncover the patterns, structures, and signals behind subscriber growth.
Watch Article Analyzer In Action
Distribution Opportunities
Discover communities, platforms, and channels where your article is most likely to attract readers.
Watch Distribution Opportunities In Action
Growth Copilot
Receive an actionable promotion roadmap including timing, distribution strategy, and next steps.
Watch Growth Copilot In Action
Content Gap Finder
Identify underserved content opportunities and emerging trends inside your niche.
Watch Content Gap Finder In Action
SEO Optimizer
Improve article structure, keyword targeting, and search visibility for long-term traffic growth.
Watch SEO Optimizer In Action
Why Writers Use Stak
Thousands of Substack writers use Stak to grow their audience with data, not guesswork.
Analyze Successful Posts
Understand what makes top Substack articles work — from structure and tone to engagement patterns.
Find Promotion Channels
Discover where your ideal readers hang out and which platforms drive the most subscribers.
Discover New Topics
Spot content gaps and emerging trends before your competitors start writing about them.
Improve Discoverability
Optimize your articles for search so new readers find you through Google and Substack search.
How It Works
From article to growth in 5 simple steps.
Paste Article URL
Paste Article URL
Enter your Substack or Medium article URL. Stak analyzes it instantly.
Analyze Article
Analyze Article
Get deep insights on quality, SEO, topic strength, and growth potential.
Discover Opportunities
Discover Opportunities
Find distribution channels, promotion platforms, and content gaps.
Execute Growth Plan
Execute Growth Plan
Follow your personalized promotion plan with actionable steps.
Get More Readers
Get More Readers
Watch your article reach new audiences and grow your subscriber base.
Simple Pricing
Start growing your articles today.
Monthly
Everything you need to grow every article.
- Unlimited Article Analysis
- Unlimited SEO Audits
- Unlimited Growth Plans
- Unlimited Opportunity Discovery
- Unlimited Content Gap Analysis
Lifetime
For founders who want lifetime access. Best value.
- Everything in Monthly
- Lifetime Access
- Future Updates Included
Frequently Asked Questions
Stak is not an AI writer.
Stak is an article growth platform for Substack and Medium writers.