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Joaquin del Rio reads primary filings so you do not have to. He writes OperatorBook's revenue teardowns from Form 990s, company registries and audited statements.
Ahrefs is private and bootstrapped, so what does it actually earn? Credible estimates put revenue near $100M to $149M a year (2023 to 2024) with zero outside investors, and the company's own blog disclosed ~$257M over three years. A sourced ledger, plus the revenue-per-employee number that really explains it.
Tailwind CSS is free, so where did the money come from, and where did it go? Tailwind Labs crossed ~$2M in revenue by 2020, then in early 2026 founder Adam Wathan said revenue was down close to 80% as AI gutted docs traffic. A sourced ledger on what a bootstrapped open-source business actually earns.
Calendly's revenue estimates range from $70M to $349M for the same year. A source-typed ledger reconciles the conflict and traces the real $270M-plus ARR back to founder Tope Awotona's $200,000 personal bet. (2026)
HighLevel, the private company behind GoHighLevel, never confirms its revenue, so estimates scatter from $82.7M (GetLatka) to $311.5M (ZoomInfo). A source-typed ledger, plus why the '$1 billion' everyone quotes is customer revenue, not the company's.
37signals, the private company behind Basecamp, never publishes its revenue, so estimates scatter from $25M to $280M. A source-typed ledger, plus the one 2006 Bezos check that complicates the 'never took a dime' legend.
1Password says it passed $400M ARR while free cash-flow positive, yet trackers quote everything from $200M to $782M. A source-typed ledger, plus the 13-year bootstrap that ended in a $920M raise.
Mailchimp hit about $800M in revenue with zero venture capital, sold to Intuit for roughly $12B in 2021, and in May 2026 Intuit confirmed its revenue is now declining. A source-typed ledger, and what actually transfers.
Craigslist has never disclosed its finances, so every revenue figure is an estimate. The famous $694M stat is a frozen 2018 peak; AIM Group data shows it has fallen to about $302M by 2024. Here is the sourced ledger and the operator lesson.
Midjourney has never disclosed revenue, so 2026 estimates run from $150M to $500M ARR. Here is the sourced ledger, the pricing math, and the number that actually holds.
Obsidian has never disclosed revenue, so 2026 estimates run from about $2M to $25M. Here is the sourced ledger, the pricing math, and the number that holds.
Lemon Squeezy hit $1M ARR in nine months, turned down a $50M Series A, then sold to Stripe for an undisclosed sum. An honest, source-typed revenue ledger, and why the disclosed number is the least interesting part.
ClickFunnels revenue peaked at a reported $265.3M in 2023, then fell to about $170M in 2024. An honest, source-typed ledger, plus the raise it never announced.
