In a world where every fundraising platform takes a cut, Zeffy (formerly simplyk.io) is playing a different game: they take nothing. Not a transaction fee, not a subscription, not a single percentage point. It’s a bold move that has attracted 50,000 charities, but the question remains—how does a $4.6M revenue business model survive on 0% fees?

"Zeffy isn't just a tool; it's a moral stance against the commodification of charitable giving."

The tech stack reveals a modern, performant foundation. Built on Vite and Tailwind CSS, with Splide for carousels and jQuery for legacy compatibility, the site is lightweight and fast. They prioritize Core Web Vitals (Lazy Loading, Priority Hints), which is critical for donors on slow connections. However, the SEO footprint is minimal—ranking only for high-intent, niche queries like 'how to run a zeffy raffle.' This indicates a product-led growth strategy where word-of-mouth trumps search visibility.

• The '100% Free' promise is their primary acquisition channel, creating a viral loop among non-profit circles.
• They dominate specific long-tail queries (e.g., 'zeffy with venmo'), capturing high-intent users at the bottom of the funnel.
• The platform is likely monetizing via 'tip-jar' models or corporate sponsorships rather than charging the charities directly.