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
96
Have earned
1
Earned, all time
$19.00
Quiet or paused
36
Median earner
$19.00
Pages read
96
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.
@coauthor$0CoAuthor lets indie Substack writers automatically swap subscriber lists based on engagement metrics, with A/B testing built in. Join the waitlist.AI agents and chat, Books and publishing28 Apr 2026@nichex$0NicheX automatically matches mid-tier Substack writers in adjacent niches and facilitates curated subscriber swaps. Grow your newsletter with readers who actually care.SEO and content, Marketplaces and directories28 Apr 2026@plotmatch$0PlotMatch connects Substack writers in the same niche and manages subscriber swaps via API integrations. Grow your newsletter without lifting a finger.SEO and content, Marketplaces and directories27 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@flostack$0FloStack matches complementary newsletters, tracks subscriber swaps, and routes payouts through Stripe for indie writers.SEO and content, Marketplaces and directories23 Apr 2026@yieldloop$0Yield Loop automatically matches Substack writers in niche finance communities and orchestrates subscriber swap campaigns. Free to join.Finance and investing, Marketplaces and directories21 Apr 2026@splitletter$0SplitLetter matches indie productivity writers for subscriber swaps, no cold DMs, no guessing. Just aligned readers.Marketplaces and directories, Productivity and notes20 Apr 2026@lettergrow$0The subscriber-swap network for indie finance writers. Connect with non-competing Substack writers and grow your list automatically.AI agents and chat, SEO and content20 Apr 2026@letterpact$0LetterPact lets indie Substack writers automatically swap subscriber recommendations with vetted creators in adjacent niches, growing their lists without paid ads.SEO and content, AI agents and chat20 Apr 2026@nudgeloop$0NudgeLoop automatically matches you with compatible productivity writers, swaps disengaged subscriber segments, and sends welcome sequences that actually convert.Productivity and notes, Marketplaces and directories18 Apr 2026@listpair$0ListPair automatically matches finance newsletter writers and orchestrates paid subscriber swaps. Crypto, options, forex, grow your list on autopilot.SEO and content, Email and outreach18 Apr 2026@mintlist$0Swap subscriber lists with other indie crypto newsletter writers. Cross-promote across NFT, DeFi, and altcoin communities.Finance and investing, SEO and content18 Apr 2026@penplex$0Penplex connects indie hackers and solopreneurs who write Substack newsletters to swap audiences with complementary creators. Grow together, not alone.SEO and content, Social media18 Apr 2026@quillx$0QuillX automatically swaps subscriber lists between non-competing AI productivity newsletters. Grow your Substack without cold outreach.SEO and content, Email and outreach17 Apr 2026@nichswap$0NichSwap automatically matches Substack writers in hyper-niche Reddit communities and facilitates subscriber swaps, zero manual outreach required.AI agents and chat, Marketplaces and directories15 Apr 2026@foliox$0FolioX matches indie Substack writers for subscriber swaps. You recommend them, they recommend you. Join the waitlist today.SEO and content, Marketplaces and directories15 Apr 2026@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@soloswap$0Auto-swap subscriber recommendations with complementary newsletters. Free, automated, and built for indie Substack writers in the solopreneur niche.SEO and content, AI agents and chat14 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@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@crosspub$0CrossPub helps independent newsletters grow through curated subscriber swaps that preserve editorial taste, reader trust, and brand.SEO and content, Scheduling and booking10 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@penpair$0Auto-swap subscriber recommendations with vetted indie newsletter creators in your niche. Grow faster, together.SEO and content, Social media8 Apr 2026@co-rr8g$0A Co matches newsletter creators for cross-promotion based on audience overlap. Grow your subscriber base organically, no ad spend required.SEO and content, Social media8 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@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@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@readermatch$0ReaderMatch helps men's self-improvement newsletter creators grow their subscriber lists through automated cross-promotion swaps. Match with complementary newsletters and grow together.Marketplaces and directories, SEO and content3 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@scrollswap$0Auto-swap subscriber lists with complementary crypto newsletters. Organic growth, no paid ads, matched by niche relevance.Market research, Marketplaces and directories2 Apr 2026@foldco$0Auto-swap curated subscriber segments with complementary Substack writers. No paid ads needed.SEO and content, Finance and investing2 Apr 2026@subbridge$0Auto-swap subscriber recommendations with complementary newsletter creators in your niche. Free growth, quality subscribers, zero ad spend.Market research, SEO and content2 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@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@swapkit$0Auto-swap subscriber lists with complementary newsletters. Organic growth for indie hackers, solopreneurs, and bootstrapped founders.SEO and content, Social media31 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@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@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@crosslist$0CrossList connects niche newsletter creators for curated subscriber exchanges. Get hand-picked matches with complementary audiences and grow sustainably.Marketplaces and directories, SEO and content10 Mar 2026@crossletter$0CrossLetter matches indie personal finance & FIRE writers for automatic subscriber list swaps. Grow your newsletter without paid ads.Marketplaces and directories, SEO and content9 Mar 2026@listflow$0Grow your crypto newsletter audience through engagement-based subscriber swaps with built-in SEC compliance checks and spam prevention.Legal and compliance, SEO and content7 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
Rows 51 to 96 of 96
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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.