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Stackr

Stakr makes it easy to back up and download your Substack articles, so you always have a copy of the work you’ve published. Your words. Your archive. Yours to keep.

SaaS · Founded 2026 · United States

SaaS

Visit migrate-substack.com ↗Founder interest ↓

Can you vibecode this?

Yes

Scraping a public Substack archive, zipping posts and images, and delivering a file is pure code. The recurring backup scheduler and WordPress/Ghost export formatting are the heaviest scope. Nothing here needs a licence or human gatekeeper.

Build This with Leapd →

The business

Total revenue

$6K+

Verified recently

Monthly revenue

$3K+/mo

↑ Growing · 60-day average

Peak month

~$4K

Best single month

For owners

Own Stackr? List it for sale.

Founders read this page looking for a business to build like your $3K+/mo one — some would rather buy one that already works. They skip the line, you get a clean exit. $25 one-time, no commission.

Why it works

Value proposition
Customers get a portable ZIP of every post, image and link they published on Substack.
Problem
Substack writers have no built-in way to back up or migrate their full archive.
Audience
Substack bloggers who want to own or move their content.
Business model
One-time export fee, monthly backup subscription, or flat concierge migration fee, all charged through Stripe.

Good to knowFree scanWordPress importGhost importWeekly backupsConcierge migration

Can you vibecode this?

Yes

Moat

Switching costs

Why people pay Stackr

Customers who have already scanned their archive and paid are unlikely to repeat the process elsewhere. Stackr also has early search visibility and word-of-mouth among Substack writers, which a fresh copy would need time to build.

Product complexity
Low
The product scans a public Substack URL, packages posts and images into a ZIP, and schedules recurring backups.
Data
Low
Content is pulled from each customer's own public Substack archive, so no proprietary dataset is needed.
Integrations & infrastructure
Low
The product reads public Substack URLs and delivers ZIP files, with no complex third-party API dependencies.
Human operations
Low
The concierge migration tier involves hands-on work, but the core export product is fully automated.
Regulation / hardware
Low
No licences, approvals or compliance regimes are required to offer archive exports.

Build this business

Use the build specification below with any AI coding tool, or build it directly with Leapd.

Build This with Leapd →

Leapd builds

Web app with Substack URL scanner, ZIP export builder and scheduled backup manager
One-time payments and monthly subscriptions with Stripe
Resend connection
A landing page

Leapd runs

Meta ads
LinkedIn and X posts
SEO and AI-search visibility
A daily report of what shipped

Opportunity check

Passes: Proven market: $3K+/mo already paid for it
Passes: Proven model: One-time export, monthly backup subscription, or flat migration fee
Passes: Proven need: Substack writers need their archive backed up
Passes: Buildable: Leapd builds it end to end

build-spec.txt

Build a web app that scans a Substack publication and sells ZIP archive exports, recurring backups, and migration packages.

Product:
- Free scan: accept a Substack or custom-domain URL, inspect the public archive and display the article count before payment
- One-time export: package all posts, images and links into a downloadable ZIP file
- Weekly backup: scheduled recurring export that keeps the archive current and available to download
- Concierge migration tier: collect order details and queue the job for hands-on handling
- Import-ready output formatted for WordPress and Ghost
- Customer dashboard to view scan results, download ZIPs and manage backup schedules
- Email delivery of backup download links via Resend

Billing:
- One-time payment for exports, monthly subscription for weekly backups, and one-time flat fee for concierge migration, all charged with Stripe; exact price shown after scan based on archive size

Integrations:
- Resend for transactional email and download link delivery, connected via the customer's own API credentials