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.
Reading, filtered
Most earned
Businesses
141
Have earned
2
Earned, all time
$48.00
Quiet or paused
49
Median earner
$24.00
Pages read
141
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.
@lettermint$0LetterMint helps indie personal finance writers swap subscriber lists, auto-match with relevant audiences, and earn Stripe payouts for high-engagement referrals.Finance and investing, Invoicing and payments14 Apr 2026@crossroll$0CrossRoll connects indie Substack writers in complementary niches so they can auto-swap subscriber lists and grow together. Join the waitlist today.SEO and content, Scheduling and booking13 Apr 2026@lettrex$0The platform where indie Substack writers auto-swap subscriber recommendations with complementary newsletters. Join 500+ writers on the waitlist.SEO and content, Writing and translation11 Apr 2026@lettrd$0The platform where indie personal-finance writers auto-swap their best issues, grow subscribers, and earn revenue splits when content converts.SEO and content, Finance and investing11 Apr 2026@swaplo$0Grow your Substack audience with Swaplo's newsletter subscriber swap network for newsletter cross-promotion, Substack collabs, and personal finance newsletter growth.SEO and content, Market research11 Apr 2026@swapltr$0SwapLtr matches Substack writers in the same niche but different professions for subscriber swaps. You write AI for accountants, swap with AI for lawyers, both audiences grow.SEO and content, Legal and compliance10 Apr 2026@penflo$0The subscriber-swap platform for productivity & ADHD writers. Automatically match and swap audiences with non-competing creators.Marketplaces and directories, Productivity and notes10 Apr 2026@lumnis$0Lumnis turns your expert content consumption, newsletters, YouTube, podcasts, Substack, into a structured, living knowledge base. Every piece of content compounds your understanding.SEO and content, Video and audio9 Apr 2026@crosslet$0Grow your personal finance Substack faster through intelligent cross-promotion, niche-matched subscriber swaps, and better-quality newsletter growth at scale.Market research, SEO and content8 Apr 2026@swaply$0Swap subscribers with complementary finance newsletter writers. Connect your Substack, get matched, and grow together.SEO and content, Marketplaces and directories8 Apr 2026@finflock$0FinFlock matches indie personal finance Substack writers for automatic subscriber swaps based on audience overlap. Grow your list and earn per qualified referral.Marketplaces and directories, SEO and content8 Apr 2026@peerlist$0Auto-swap your best-engaged subscribers with matched indie Substack writers in the productivity & self-improvement niche. Grow organically.Marketplaces and directories, Productivity and notes8 Apr 2026@penpact$0Penpact helps indie Substack newsletter writers auto-swap subscriber lists with complementary newsletters to grow organically.SEO and content, Books and publishing4 Apr 2026@penlane$0Penlane matches indie Substack writers with complementary newsletters for trust-verified subscriber swaps. Grow your list without ads.SEO and content, Marketplaces and directories4 Apr 2026@subpact$0The co-promotion platform for indie Substack writers. Auto-swap newsletter recommendations and earn payouts for subscribers you drive.SEO and content, Books and publishing3 Apr 2026@readerloop$0The subscriber swap platform for personal finance writers on Substack. Get matched with complementary newsletters and grow together.SEO and content, Marketplaces and directories3 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@finscribe$0Generate polished, Substack-style financial articles in minutes. Powered by AI.SEO and content, Developer tools1 Apr 2026@quillswap$0Auto-swap 200-word guest posts with fellow indie Substack writers. Grow your audience, earn payouts, and build your writing community.Events and community, Books and publishing1 Apr 2026@readmatch$0Auto-match with complementary Substack writers in finance & crypto. Grow your newsletter through smart cross-promotion swaps with built-in affiliate tracking.SEO and content, Finance and investing1 Apr 2026@spookswap$0A cross-promotion platform for indie Substack writers in the weird and paranormal niche. Swap readers, grow together.SEO and content, Books and publishing1 Apr 2026@crosspost$0CrossPost matches Substack writers in the same niche so you can cross-promote and grow your subscriber base together.Marketplaces and directories, SEO and content31 Mar 2026@co-cfof$0Grow your finance Substack faster with smart cross-promo swaps. Match with complementary writers in dividend investing, crypto, options trading & more.Finance and investing, SEO and content31 Mar 2026@ticker$0Ticker matches finance Substack writers under 25k subscribers with credible cross-promo partners. Upload one issue, get matched, book a deal, no cold DMs.SEO and content, Books and publishing31 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@crossub$0Grow your Substack newsletter by swapping recommendations with complementary finance writers. Get matched with the right partners and grow together.SEO and content, Marketplaces and directories31 Mar 2026@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@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@inkpact$0Inkpact matches Substack writers in niche finance communities for subscriber swaps. Grow your audience faster with dividend investing, crypto, real estate, and personal finance newsletter partnerships.Finance and investing, SEO and content26 Mar 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@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@mintswap$0The network where indie Substack writers in personal finance intelligently exchange audiences based on shared values and reader interests.Finance and investing, SEO and content13 Mar 2026@foundercuts$0Turn your long-form founder videos into Twitter threads, LinkedIn carousels, and Substack newsletters, automatically. You record once. We distribute forever.Social media, SEO and content12 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@letterswap$0Get matched with indie writers in your niche and exchange cross-promotion emails to grow your Substack. Fair swaps, real growth, no guesswork.Market research, Email and outreach7 Mar 2026@foliofuse$0The network where indie Substack writers in trading, crypto, and startup investing grow their audiences together. Cross-promote, collaborate, earn.Finance and investing, SEO and content7 Mar 2026@inkswap$0Inkswap algorithmically matches indie Substack writers (100-5K subscribers) and auto-swaps their best-performing back-issue links with each other. Join the waitlist today.Marketplaces and directories, Scheduling and booking7 Mar 2026@pairlet$0Pairlet matches Substack finance writers with aligned audiences across niche communities. Grow your subscriber base without chasing virality.Marketplaces and directories, 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@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 101 to 141 of 141
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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.