BEHIND THE BUSINESS MODEL
Source-linked case studies on customers, pricing, growth channels, and the decisions worth learning from. Reported facts and our analysis are labeled separately.
Counts cover the full case library. Source checks are research dates, not financial reporting periods.
Tally, PostHog, Fider, Carrd, Buffer and Senja all give away a real product; they differ in which limit pushes a user to pay.
Company disclosure · Original disclosure
Sources checked Oct 18, 2026
A September 2026 founder update describes a form builder whose acquisition mix evolved after years of product-led growth.
Company disclosure · Original disclosure
Sources checked Oct 21, 2026
Carrd keeps three free sites and sells upgrades from about the price of a lunch per year, a rare pricing choice in a monthly-subscription market.
Founder direct transcript at 03:28 · Original disclosure
Sources checked Oct 18, 2026
Buffer's own history traces a narrow initial use case into a wider publishing product, while its public records expose more than a success headline.
Company disclosure · Original disclosure
Sources checked Oct 18, 2026
Cal.com positions scheduling as infrastructure for teams and products, and publishes how it operates, including opt-in salary transparency.
Company/team self-disclosure with quoted founder announcement · Original disclosure
Sources checked Oct 18, 2026
A Dutch analytics tool stayed a one-person product until 2022, when a co-founder joined to lead marketing; it now runs as a self-funded team of three.
Company disclosure · Original disclosure
Sources checked Oct 18, 2026
Reported revenue is not profit. Metrics, currencies and reporting periods may differ; cases combine cited facts with labeled editorial analysis. Read the source policy →