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

17

Have earned

0

Earned, all time

$0

Quiet or paused

11

Median earner

none

Pages read

17

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.

@nichelink$0NicheLink auto-matches indie Substack writers in the same niche and orchestrates cross-promotions. Grow your newsletter through performance-based swaps.SEO and content, Marketplaces and directories5 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@periscope$0Track competitor pricing, stock, promotions, changelogs, and ad angles. Get instant, daily, or weekly alerts.E-commerce and retail, Market research26 May 2026@spillr$0Auto-match your newsletter with complementary creators and grow your subscriber count through curated cross-promotions.SEO and content, Social media21 May 2026@writerex$0WriterEx helps Substack writers in indie hacking and startup advice grow through smarter cross-promotions.SEO and content, Books and publishing20 May 2026@nesloft$0Auto-matched cross-promotions between complementary micro-SaaS newsletters. For founders doing $5K, $50K MRR.SEO and content, Writing and translation16 May 2026@writepact$0Automated newsletter swaps, co-promotions, and built-in A/B testing for indie Substack writers in the productivity and self-improvement niche.SEO and content, AI agents and chat29 Apr 2026@pagio$0AI agent that autonomously keeps local business websites updated, new hours, promotions, seasonal content, without you lifting a finger.SEO and content, Websites and landing pages24 Apr 2026@syndicate$0Syndicate matches independent Substack writers with relevant newsletter partners, coordinates the swap, and delivers ready-to-send promo copy so you can grow without cold outreach.SEO and content, Email and outreach19 Apr 2026@penpair$0Auto-swap subscriber recommendations with vetted indie newsletter creators in your niche. Grow faster, together.SEO and content, Social media8 Apr 2026@rivalmind$0Track your competitors automatically. Get weekly reports on pricing changes, new products, promotions, and AI-generated strategic insights.E-commerce and retail, Market research3 Apr 2026@co-70qm$0A Co matches newsletter writers for smart cross-promotions. Trade subscribers with complementary creators and grow together, no ads required.SEO and content, Social media3 Apr 2026@nicheloop$0Automatically get matched with Substack writers in your niche for cross-promotions. Grow your subscriber base faster with targeted subscriber swaps.Marketplaces and directories, SEO and content1 Apr 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@listswap$0The smartest way for indie Substack writers to grow their audience. Trade shoutouts with complementary newsletters and own your distribution.SEO and content, Books and publishing13 Mar 2026@rivalytics$0Monitor your competitors' every move. Price changes, new products, promotions, get instant alerts and stay ahead. Built for mid-market Shopify merchants.E-commerce and retail, Market research8 Mar 2026@swapstack$0SwapStack intelligently matches indie Substack writers in the same niche and automates cross-promotions. Grow your audience organically, no algorithms, no ad spend.Marketplaces and directories, SEO and content6 Mar 2026

Rows 1 to 17 of 17

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.