NoteStack — Substack Analytics & AI-Powered Scheduler
NoteStack is a Substack analytics Chrome extension: 235 installs, 68% install-to-use conversion, live on the Chrome Web Store — all fully organic, zero marketing done yet. Full product built: analytics dashboard, competitor analysis, best-time insights, plus a Pro tier ($8–$12/mo) — AI Ghostwriter that writes Notes in the user's voice, bulk scheduler, and sponsor media-kit generator. Working licensing infrastructure. Turnkey for a buyer to grow. Solo-built, clean codebase, full handover included
NoteStack — Substack Analytics & AI-Powered Scheduler
NoteStack is a Substack analytics Chrome extension: 235 installs, 68% install-to-use conversion, live on the Chrome Web Store — all fully organic, zero marketing done yet. Full product built: analytics dashboard, competitor analysis, best-time insights, plus a Pro tier ($8–$12/mo) — AI Ghostwriter that writes Notes in the user's voice, bulk scheduler, and sponsor media-kit generator. Working licensing infrastructure. Turnkey for a buyer to grow. Solo-built, clean codebase, full handover included
Ranked #7764 on TrustMRR
1 active subscriptions
32 followers on 𝕏
Revenue is verified with
Polar API key.Last updated: Nov 2, 2026, 06:08 PM
Turns Substack Notes into growth: analytics, AI writing in your own voice, and scheduling — all in one Chrome extension.
Substack creators fly blind on Notes — no analytics, no way to see what works, and slow manual writing and posting.
Audience
Substack writers and newsletter creators growing an audience through Notes.
Pricing
Starter - $8/mo Billed monthly · 7-day free trial Pro - $12/mo Billed monthly
Team size
1 person
Tech stack
Frontend
Additional info
Live on the Chrome Web Store with 235 organic installs and ~68% install-to-use conversion — zero marketing spend to date. Full product built: 19 free features plus a 5-feature Pro tier, with working licensing infrastructure. Analytics stay local in the browser; AI features run through a lightweight

"I’m selling because I don’t currently have the marketing budget to grow the app, and I’m shifting my focus to other projects. The extension is already built and offers a clear opportunity for someone with the resources to invest in marketing and scale it further."
engineer.who.vibes
Founder of NoteStack — Substack Analytics & AI-Powered Scheduler
Product updates
More startups for sale
View MarketplaceVolume Booster: Louder Sound
Volume Booster helps you make quiet videos and audio files louder directly on your iPhone or iPad. | About 3,000 downloads a month from App Store search. We have never spent money on ads. | No servers, no backend and no monthly costs. Everything runs on the device. | Fully localized in 32 languages, with prices set per country. | Downloads come from App Store search ORGANIC. No ads
Revenue (30d)
$391
Asking Price
$7.5k
Multiple
1.6x
ReplyCurrent
ReplyCurrent is an AI customer support SaaS I built to help businesses answer customer questions automatically. You connect your website, help center, or documents, and it creates an AI chatbot that answers visitors using your own content. It also supports lead capture, conversation tracking, and a dashboard to see what customers are asking. The goal is simple: help businesses save time on support while giving visitors quick, accurate answers.
Revenue (30d)
$274
Asking Price
$1.8k
Multiple
0.5x
Backlink Checker
Backlink Checker is a link monitoring tool that monitors your backlinks & informs you if your backlinks are removed. We charge users in subscription plans or lifetime access to monitor their backlinks.
Revenue (30d)
$1.1k
Asking Price
$5.5k
Multiple
0.4x
Vid.AI
Turn any idea or script into ready-to-post videos that get views. AI generates voiceovers, visuals, and edits – all in minutes, no skills needed.
Revenue (30d)
$38k
Asking Price
$1.5M
Multiple
3.3x
Unnamed Company
AI Social Media
Revenue (30d)
$3.8k
Asking Price
$80k
$55k
Multiple
1.2x
White Glove Content
We provide a subscription-based content production service for creators and brands who want to publish faceless video content across online social media platforms, including YouTube, TikTok, Instagram Reels, and Facebook. Clients pay a recurring monthly or annual fee and receive fully produced, ready-to-upload video content — including scripting, AI voiceover, video editing, and thumbnail design. All deliverables are provided digitally via their personal dashboard and ready for auto-upload.
Revenue (30d)
$66k
Asking Price
$2.5M
Multiple
3.2x