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An AI spreadsheet assistant that turns plain-English requests into Excel formulas and sells time savings by subscription.
$6.99/month or $75/year · claimed 87.5% margin · 380,000 monthly visitors
Fewer bars = easier, cheaper, or faster for an AI-assisted solo builder. Editorial judgments based on the case details.
Formula Bot is an artificial-intelligence product that turns plain-language instructions into Excel formulas and helps users analyze spreadsheets. The creator-reported case study attributes the business to founder David and says it launched on August 28, 2022. A YouTube narrator, summarizing a post credited to Diego on Indie Hackers, reports $164,000 in profit over 12 months, 380,000 monthly website visitors, 650,000 premium users and 10,900 paid users. Those labels are internally inconsistent because the source uses unclear labels for the 650,000 and 10,900 user counts, so they should not be combined into a conversion rate. The reported subscription prices are $6.99 monthly and $75 annually, with a claimed 87.5% margin. A Reddit launch post reportedly earned over 10,000 upvotes and sent 81,000 visitors. The creator describes Bubble, Sendinblue, Stripe and OpenAI in the stack, with organic search supplying about half of site visits. The evidence makes this a useful case in validating spreadsheet pain before building a broader AI tool.
9 more sections — how the first customers came, how the first dollar landed, what turned the flywheel, and how they got through the silent stretch. Members read all of it.
Join the Unicorn Club — $5/moCancel anytime, in one clickThe quick-reference card — acquisition channels, replication playbook, and risk map — is members-only.
Join the Unicorn Club — $5/moCancel anytime, in one clickPaste into Claude Code / Codex and get a working version of this product end-to-end.
Two production-grade prompts per idea — a full build spec and an SEO growth plan — plus 10 tailored build specs a week. Members only.
Join the Unicorn Club — $5/moCancel anytime, in one clickEvery claim traces back to a listed source.
Source links and the full captured transcripts — the raw material behind every number — are members-only.
Join the Unicorn Club — $5/moCancel anytime, in one clickData credibility: The YouTube creator summarizes a case study credited to Diego and an Indie Hackers post about founder David. Revenue, profit, traffic, pricing, user counts, margin and traffic-source shares are creator-reported in the transcript and are not independently verified there. The wording “650,000 premium users” alongside 10,900 paid users is unclear, so this entry does not calculate conversion from those figures. The monthly price example in the landing-page calculator is garbled in the transcript and is not used as a factual price; the clearly stated $6.99 monthly and $75 yearly prices are retained.