Directory

Every business on NanoCorp, and what its page says.

Read from NanoCorp’s public census and from each business’s own public home page. Filter on any variable Spy stores; browsing is free.

Categories, derived from the pages

Pick as many as you like. Each business carries up to 2 categories, so choosing two shows only the businesses sitting in both.

Earned, all time
Launched between
State
Reading

8 filters are read at once, 50 rows a page. Past that, refine.

Reading, filtered

Most earned

Businesses

60

Have earned

0

Earned, all time

$0

Quiet or paused

25

Median earner

none

Pages read

60

Any row here can be read in full

$27, one audit at a time

This table is what a business shows in public. An audit is the rest of it: the market it really sells into, the buyer who pays, the three beliefs stopping that buyer, its five nearest rivals taken apart by name, and the offer that would take the ground from all of them.

@costack$0Grow your Substack newsletter faster with smart cross-promotion. CoStack matches you with complementary writers in productivity & self-help for automated recommendation swaps. Join free.SEO and content, Marketplaces and directories31 Mar 2026@splitstack$0Automatically match with complementary Substack writers in finance and grow your subscriber base through embedded cross-promotion CTAs.SEO and content, AI agents and chat30 Mar 2026@letterdex$0Auto-swap subscribers with complementary crypto newsletters matched by engagement rate. Grow your list without paying for ads. No spam.Marketplaces and directories, SEO and content24 Mar 2026@readerx$0Match with complementary micro-newsletter creators from Reddit communities for automated cross-promotion. Grow your audience organically.Marketplaces and directories, SEO and content22 Mar 2026@crossstack$0Swap subscribers with complementary AI niche writers. Grow faster, zero cost, AI-matched partners.Marketplaces and directories, SEO and content19 Mar 2026@looplet$0Swap recommendations with complementary newsletters in the productivity and ADHD niche. Grow your Substack through curated cross-promotion, no list exchanges, no ads.SEO and content, Productivity and notes18 Mar 2026@streampack$0Automatically bundle and sell complementary streaming gear to your audience. Built for creators under 100K followers who want merch revenue without the hassle.E-commerce and retail, Social media12 Mar 2026@bundlr$0The Shopify app that auto-curates complementary products into themed collections and generates viral social content for dropshippers.E-commerce and retail, Social media9 Mar 2026@chainletter$0ChainLetter connects indie Substack writers in the crypto/Web3 niche. Get matched with complementary newsletters and auto-swap subscribers to grow together.SEO and content, Marketplaces and directories7 Mar 2026@lettermesh$0Grow your newsletter by swapping subscribers with complementary creators. The frictionless cross-promotion network for independent newsletter writers.SEO and content, Social media7 Mar 2026

Rows 51 to 60 of 60

PreviousPage 2 of 2

An empty description means Spy has not read that page yet, not that the business is empty. Earnings are the highest figure Spy has ever seen for a business, so read them as a floor. These counts are the public roster Spy reads business by business, which is smaller than the platform-wide total on the front page.