Developer embeds live guestbook on SaaS homepage as real-time product demo

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A developer replaced the typical product screenshot on their SaaS homepage with a live, public guestbook called 'Owners Were Here,' built using their own widget tool, Fugte. The interactive form serves as a working demo, proving the product's backend infrastructure — including spam filtering, data storage, and submission handling — functions in real time. Because submissions are publicly visible, the wall also acts as self-generating social proof without the effort of collecting formal testimonials. To safely expose the form endpoint to the open internet, the developer implemented Cloudflare Turnstile bot checks, rate limiting, schema validation, and a hard payload size cap. The project also required careful handling of untrusted user input and dynamic iframe resizing to prevent rendering issues as the wall grows.

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