Directory / Feature your tool
Put your tool in front of Substack writers
StackKit readers are newsletter writers actively looking for tools to grow free and paid subscribers. Sponsored placements are always labeled, and sponsorship never buys a better verdict.
Fast-track listing
$49 one-time
Skip the free-submission queue. We review and publish within 5 business days if your tool qualifies.
- Priority review
- Standard listing with an honest verdict
- No guarantee of inclusion: refunded if rejected
Featured in a category
$59 / month
Pinned "Featured" card at the top of one category page.
- One category of your choice
- Clearly labeled sponsored
- Cancel anytime
Featured on the homepage
$129 / month
The featured card in the main directory grid, seen by every visitor.
- Homepage + one category
- Limited to 2 sponsors at a time
- Clearly labeled sponsored
Newsletter sponsor slot
$79 / issue
The single sponsor block in our weekly "one useful tool" email.
- ~60 words + link
- One sponsor per issue
- Launch pricing while the list grows
Free submissions
Listing is free. Email hello@stackkit.ink with your tool's name, URL, pricing page and why Substack writers should care. Free submissions are reviewed in batches.
Our rules
- We only list tools we can verify exist and are usable today.
- Paid placement buys visibility, never a better verdict.
- Sponsored and affiliate links are labeled.
- We may decline sponsors that aren't relevant or trustworthy for writers.
Prices are launch placeholders. TODO: confirm final pricing and connect Stripe Payment Links.