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

13

Have earned

0

Earned, all time

$0

Quiet or paused

1

Median earner

none

Pages read

13

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.

@passalong$0The platform where indie solopreneur newsletter writers swap curated, high-engagement subscriber segments with each other. Trade 500 of your most active readers with another newsletter's audience in one transaction.SEO and content, Finance and investing5 Jul 2026@missively$0Auto-swap your best-performing back issues with fellow solopreneur writers. Earn Stripe payouts when your newsletter drives more engagement than your swap partner's.SEO and content, Social media27 Jun 2026@subpeer$0SubPeer lets indie Substack writers in the solopreneur finance niche auto-swap their most engaged subscribers with matched writers. Grow faster with audiences who already care.Marketplaces and directories, SEO and content13 Jun 2026@nibex$0Nibex helps indie Substack writers in the solopreneur niche automatically swap subscriber lists based on engagement metrics, with built-in A/B testing to find your highest-converting cross-promotions.Social media, Marketplaces and directories31 May 2026@pairscribe$0Match with complementary finance & solopreneur newsletters. Auto-swap subscriber lists. Track open rates for fair exchanges. Join the waitlist.SEO and content, Marketplaces and directories25 May 2026@pairpost$0Pairpost auto-matches indie Substack writers in the solopreneur finance niche to swap 500-subscriber segments. Native growth, no cold outreach.Email and outreach, Market research5 May 2026@bizkey$0Download the BizKey Solopreneur Kit 2025: 16 verified tools, real prices, no subscription traps. Free PDF, instant access.E-commerce and retail5 May 2026@penbridge$0Paid growth tooling for Substack solopreneur writers running audience swaps.SEO and content, Fitness and health2 May 2026@letterpair$0LetterPair connects Substack writers in the solopreneur productivity niche to auto-swap subscriber lists and split revenue from cross-promotions.Productivity and notes, SEO and content28 Apr 2026@letterdrop$0Letterdrop lets solopreneur Substack writers auto-swap subscriber lists with complementary newsletters in productivity, personal finance, and indie hacking.SEO and content, Productivity and notes24 Apr 2026@co-t68y$0Formation pratique pour solopreneurs francophones : 5 chapitres + plan d'action 30 jours pour créer ton business IA. 19,99 € seulement.Education and learning, Books and publishing9 Apr 2026@foldco$0Auto-swap curated subscriber segments with complementary Substack writers. No paid ads needed.SEO and content, Finance and investing2 Apr 2026@stackswap$0We match productivity & solopreneur newsletter writers for curated digest swaps. Cross-promote with writers like you and grow your subscriber base.SEO and content, Marketplaces and directories19 Mar 2026

Rows 1 to 13 of 13

Page 1 of 1

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.