StackContacts - See Which Subscribers Are Ready to Pay

You're not bad at growing. You've been flying blind.

Substack shows you vanity numbers. Total subscribers. Open rates. View counts that don't match anything.

But it never shows you the 47 people who clicked 5+ links last month. Or the 12 readers who comment on everything but haven't upgraded. Or the exact moment your best subscriber stopped opening emails.

You've been making decisions about your audience without actually knowing your audience. That's not a skill problem. That's a visibility problem.

StackContacts fixes that. Now you can finally see who's engaged, who's ready to pay, and who's about to leave.

Ask anything. Get answers you can act on.

No spreadsheets. No SQL. Just ask what you want to know.

"Show me everyone who clicked 3+ links but never left a comment"

→ 23 subscribers found. Your lurkers who engage deeply but silently. Perfect for a "I noticed you've been reading..." outreach. Three of them have been subscribed for 11 months.

"Who opened every email last month but isn't a paid subscriber?"

→ 47 subscribers found. Your warmest leads. They read everything you write. They just haven't been asked to upgrade yet.

"Which subscribers stopped opening emails in the last 30 days?"

→ 156 subscribers at risk. These people used to engage. Now they're slipping away. You have maybe 2 weeks before they're gone forever.

You already know this is true

✓ Substack's analytics are confusing. The numbers don't add up. You've Googled "why are Substack stats wrong" more than once.
✓ Growth isn't linear. Some posts take off for no reason. Others flop despite being your best work. You don't know why.
✓ Your most engaged readers are invisible. You can't name the 10 people who engage with everything you write. They exist. You just can't find them.
✓ Monetization feels like guessing. "When should I go paid? Who would actually pay?" You're making decisions without data.

One promise: You'll finally know your audience.

Not "have better analytics." Not "see more metrics." You'll know who's reading, who's engaged, who's ready to pay, and who's about to leave. Every feature exists to answer one question: Who should I talk to next, and what should I say?

How It Works

Get Answers in 15 Minutes

Connect

Link your Substack, Gumroad, and Kit accounts. Your credentials stay encrypted. Setup takes 2 minutes.

Sync

Your subscribers, engagement events, and purchase history sync to a private database on your Mac or PC. Your data never leaves your computer.

Ask

Talk to your data in plain English using Claude or Cursor. Find your superfans, identify warm leads, and catch at-risk subscribers.

What This Means For You

Find your superfans by name

See exactly which subscribers open everything, click every link, and comment on your posts. These are the people you should be talking to. Now you know who they are.

Know who's ready to pay

Not everyone is ready to upgrade. But some people are. See who's been engaging for months without converting—your warmest leads, sorted by how ready they are.

Catch subscribers before they leave

Someone who opened every email for 6 months just stopped. You have maybe 2 weeks before they're gone forever. Get flagged before it's too late.

See exactly which post drove each sale

Stop guessing which content converts. StackContacts connects your Substack posts to your Gumroad purchases, so you know exactly what topics your audience will pay for.

All your audience data in one place

Substack subscribers, Gumroad customers, Kit contacts—automatically synced into a single view. No more switching between dashboards or copy-pasting into spreadsheets.

Your data never leaves your Mac or PC

StackContacts runs entirely on your computer. Your subscriber list, engagement data, and purchase history stay private. We never see your data.

Investment

Simple, Value-Based Pricing

Hobbyist Edition

Entry

$19 /lifetime

✓ 1 Publication
✓ Substack Data Sync
✓ Subscriber Analytics
✓ Basic Support

Buy Hobbyist Edition

Starter Edition

$49 /lifetime

✓ 3 Publications
✓ Substack Data Sync
✓ Subscriber Analytics
✓ Basic Support

Buy Starter Edition

Pro Edition

Pro

$149 /lifetime

✓ 5 Publications
✓ Substack + Gumroad Sync
✓ Subscriber Analytics
✓ Revenue Analytics
✓ Standard Support

Buy Pro Edition

Business Edition

Enterprise

$499 /lifetime

✓ Unlimited Publications
✓ Substack + Gumroad + Kit (ConvertKit) Sync
✓ Subscriber Analytics
✓ Revenue Analytics
✓ Segmentation Insights
✓ Priority Support

Buy Business Edition

Support Tiers

Basic Support

Email support
3-5 business day response
Documentation & tutorials
Bug fixes & troubleshooting

Standard Support

Priority email support
1-2 business day response
Setup assistance
Integration troubleshooting

Priority Support

Same-day email support
Private chat access
Dedicated support contact
Feature request priority

Open your dashboard. See exactly which 47 subscribers are ready to become paid.