Founder sells $10M business to bet on an internal tool
Within found product-market fit three times, and the third attempt is the company. Its first two products, NDA review for law firms and then in-house legal, stalled near $800K ARR because the market rather than the product was the constraint. A move to finance teams in 2020 broke the pattern, and an internal tool that turned recordings of work into requirements documents became the product, reaching about $20M in eighteen months.
Takeaways
- Slow growth points to the market. Antos says raising conversion by five percent will not 10x a business, so the constraint is usually in the market rather than the funnel. He and host Pablo Srugo agree that with basic discoverability and a product people really want, growth takes off.
- Talk to thirty, then reach a hundred customers. Thirty conversations validate an idea, Antos says. Product-market fit only becomes legible around a hundred customers, because by then you have had a hundred goes at it and the motion reveals itself. He calls these the two magical numbers for founders.
- Founder fit decides which pivots take off. The finance business depended on professional services and implementation, which Antos and his co-founder struggled with for two years and were not good at. It reached about $10M in 2024 and was sold to a partner who took over every person supporting it.
- Record every customer conversation in one database. Customer 360 keeps every conversation in Salesforce, enriched with usage data and Linear tickets. Agents produce weekly reports on sentiment by industry and on how similar customers' language is. Antos says industries where customers use the same words grow faster.
- Plan in ninety-day cycles, four or five bets. Within plans quarterly with an extended executive team and will not run longer cycles. Every experiment carries a metric and a clear success bar, such as one hundred MCP users in ninety days. Nine out of ten fail, but the winners pay off exponentially.
The three products Within built
- First, NDA review for law firms and in-house legal teams, built on LSTMs and CRFs. Salesforce was an early customer, but the product was janky and did not generalize to MSAs or DPAs.
- Second, the same product sold to in-house legal departments, which do not bill by the hour. It reached about $800K ARR and stayed a lifestyle business for two and a half years.
- Third, finance teams, chosen in 2020 after Antos and his co-founder decided to be function-specific rather than industry-specific. Eight customers and about $340K ARR in six months told them the problem was worth paying for.
- Fourth, an internal tool called the architect, which turned recordings of work into business requirements documents. It drew all the attention at a customer conference of almost 500 people, did $350K ARR in five weeks and over $1M the next quarter.