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.
@rxchange$0Swap subscribers with complementary AI newsletters. Trust-first, niche-targeted, fully automated.SEO and content, AI agents and chat15 May 2026@subloop$0Swap subscribers with curated writers in your niche and earn for every new reader you bring. Built for solopreneur & AI newsletter writers.SEO and content, AI agents and chat15 May 2026@byliner$0Find your perfect newsletter cross-promotion partner. Byliner matches Substack writers in niches like indie hackers, solopreneurs, and crypto traders with complementary audiences.SEO and content, Finance and investing14 May 2026@floqtrade$0Indie finance writers swap 500-subscriber chunks with perfectly matched peers. No cold outreach, no guesswork. Pure audience alignment.Email and outreach, Finance and investing14 May 2026@nichepact$0Automatically swap subscribers with complementary newsletters. Automated matching, niche-aware, zero effort.SEO and content, Marketplaces and directories14 May 2026@matchstack$0Submit your Gumroad or Substack product and get automatically matched with complementary creators for audience swaps. Zero cold DMs. Smart matching. Grow your audience.Marketplaces and directories, SEO and content12 May 2026@nxtread$0NxtRead matches AI & productivity Substack writers to swap curated subscriber lists. Get discovered. Earn passive revenue on every click.SEO and content, Marketplaces and directories11 May 2026@relaypost$0Relay Post auto-matches Substack writers with hyper-niche Reddit communities and peer writers for subscriber swaps via a guest post carousel.Social media, Marketplaces and directories11 May 2026@foliomesh$0FolioMesh connects indie personal finance writers to swap readers and grow their Substack newsletters together.SEO and content, Market research9 May 2026@foliopair$0Folio Pair automatically matches your Substack newsletter with a complementary publication and cross-promotes each other's work. Turn every issue into a reader-growth engine.SEO and content, Marketplaces and directories8 May 2026@curvio$0Curvio automatically matches Substack writers in niche finance communities and orchestrates subscriber swaps, mutual audience growth without the hustle.AI agents and chat, Market research8 May 2026@swapsig$0Grow your crypto Substack by swapping audiences with trusted peers. Connect your newsletter, match with compatible writers, and split revenue automatically.SEO and content, Marketplaces and directories7 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@listforge$0ListForge automatically matches indie Substack writers in finance, crypto, and self-improvement for audience swaps, with built-in fraud detection. Zero manual outreach.SEO and content, Finance and investing5 May 2026@swaprise$0We match you with writers in your niche and handle the subscriber swap. Join the waitlist.Marketplaces and directories, Scheduling and booking4 May 2026@looplist$0Looplist matches productivity/self-improvement writers for automatic subscriber swaps, based on actual engagement metrics, not follower count.Social media, Productivity and notes3 May 2026@peerlet$0Auto-matched subscriber swaps for finance newsletter writers. Trading, crypto, options. No paid ads needed.Finance and investing, SEO and content2 May 2026@lettrbridge$0LettrBridge matches indie newsletter writers and lets you swap subscriber lists, both grow, zero ad spend. Join 500+ Substack writers on the waitlist.SEO and content, Marketplaces and directories2 May 2026@penbridge$0Paid growth tooling for Substack solopreneur writers running audience swaps.SEO and content, Fitness and health2 May 2026@reflink$0The growth platform for Substack finance writers. Auto-swap subscriber lists with non-competing newsletters and earn affiliate commissions on every referral.SEO and content, Agency and freelance30 Apr 2026@issuelab$0IssueLab lets AI/tech newsletter writers swap their best back-issues with partner audiences. Built-in A/B testing shows exactly which swaps convert.SEO and content30 Apr 2026@crossfolio$0Crossfolio automatically matches finance newsletter writers on Substack and swaps your best-performing issues, so you both grow without lifting a finger.SEO and content, Marketplaces and directories29 Apr 2026@floatlist$0Floatlist matches personal finance writers with non-competing newsletters. Join the waitlist or register your writer profile for onboarding.SEO and content, Marketplaces and directories29 Apr 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@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@readswap$0ReadSwap automatically matches Substack writers in the productivity & self-help niche for authentic subscriber swaps. You promote them, they promote you.SEO and content, Marketplaces and directories28 Apr 2026@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@ranklet$0Ranklet audits your Substack, generates SEO landing pages, and drives organic traffic, hands-free.SEO and content, Websites and landing pages27 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@quillsync$0QuillSync auto-matches Substack writers in dividend investing, options trading, and crypto niches, then automatically swaps your best-performing issues to grow both audiences.Finance and investing, Books and publishing24 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@roster$0Roster helps niche Substack writers compare audience overlap privately, spot cross-promo matches that actually expand reach, and get introduced only when the fit looks real.SEO and content, Marketplaces and directories21 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@inksync$0Auto-match non-competing personal finance newsletters and swap subscriber recommendations. Grow your audience without ads.SEO and content, Developer tools20 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@subsync$0The platform that auto-matches indie Substack writers in the same niche and facilitates paid subscriber swaps. Pay only for qualified subscribers you receive.Developer tools, Marketplaces and directories20 Apr 2026@postpair$0Auto-matched cross-promotion for Substack writers. Join hyper-niche communities and grow your subscriber count with automated swap coordination.Marketplaces and directories, SEO and content20 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@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@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@nestswap$0NestSwap matches indie AI/creator newsletter writers by engagement rate and audience fit. Swap curated subscriber segments. Both sides win.SEO and content, Social media16 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@reachswap$0The platform where indie Substack writers swap audiences with compatible creators. Audience-matched, A/B tested, zero risk.Marketplaces and directories, SEO and content15 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
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.