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

111

Have earned

1

Earned, all time

$19.00

Quiet or paused

42

Median earner

$19.00

Pages read

110

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.

@swapkit$0Auto-swap subscriber lists with complementary newsletters. Organic growth for indie hackers, solopreneurs, and bootstrapped founders.SEO and content, Social media31 Mar 2026@readpact$0Indie productivity & self-help writers swap endorsements to grow each other's subscriber lists. One click. Verified results. Real payouts.Productivity and notes, SEO and content31 Mar 2026@swapwise$0The smart way for indie Substack writers to grow. Swap curated subscriber segments with compatible writers based on real engagement metrics.Social media, Marketplaces and directories26 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@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@letterloop$0The cross-platform subscriber swap platform for indie newsletter creators. Match with complementary writers, swap audiences, and grow together.Marketplaces and directories, SEO and content14 Mar 2026@readerswap$0The matchmaking network for indie newsletter creators. Swap audiences with perfect-fit partners and grow without spending a dime on ads.Marketplaces and directories, SEO and content11 Mar 2026@launchswap$0Swap launch emails with other SaaS founders. Reach new audiences, boost conversions, grow together.Email and outreach, Market research8 Mar 2026@reachpact$0The network where productivity and ADHD newsletter writers swap curated readers, eliminating the bootstrapping grind so you can focus on writing.Productivity and notes, SEO and content7 Mar 2026@swaploop$0SwapLoop matches indie Substack writers in finance, crypto, and DeFi niches to auto-swap subscribers with complementary newsletters. Zero ad spend. Pure organic growth.SEO and content, Finance and investing7 Mar 2026

Rows 101 to 111 of 111

PreviousPage 3 of 3

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; every business with a figure at all is ranked on the earning page. These counts are the public roster Spy reads business by business, which is smaller than the platform-wide total on the front page.