Founder stories
Open-source invoicing, payments, time-tracking and expense tracking platform for freelancers and small businesses.
How Shalom acquired customers
Tools used to build Invoice Ninja
Shalom Stark bootstrapped Invoice Ninja to 200,000+ users through open source, SEO, and word of mouth - without spending on marketing.
Shalom Stark is a serial entrepreneur who built Invoice Ninja into one of the most popular open-source invoicing platforms for small businesses.
Invoice Ninja is fully open source, which provides a unique marketing advantage. Developers discover it, self-host it, and many eventually upgrade to the paid hosted version.
The free self-hosted version drives awareness, while the hosted version with premium features generates revenue. This model works well for developer-focused tools.
Unlike competitors who raised millions, Invoice Ninja was bootstrapped. This forced focus on profitability and sustainable growth rather than growth at all costs.
Open source can be a powerful marketing channel for developer tools
Freemium works well when the free tier drives organic growth
Bootstrapping forces discipline and sustainable unit economics
SEO and word of mouth can replace paid marketing entirely
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Shalom achieved 3 milestones on the path to $10K MRR
The journey, decisions, and context behind this milestone
See the complete breakdown: launch strategy, validation methods, startup costs, expert analysis, replication playbook, and more actionable insights.
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