Experts critique vibe-coded startup landing pages for poor conversion

A review of four startup landing pages—Ego, Sentient OS, Sarah Novus, and Slashy—identified recurring design flaws in AI-generated or vibe-coded websites. Key issues included unclear calls to action, excessive scroll-jacking, and misleading interactive elements that appear functional but are not. For Ego, the primary call to action was buried below the fold, while a non-functional input box distracted users. Sentient OS relied on scroll-jacking and small, hard-to-read text for its download button, and Sarah Novus was criticized for vague, investor-pitch-style copy that failed to explain product utility to end-users. Slashy was noted for having a busy demo video and ambiguous social proof.

The reviewers emphasized that conversion rates drop when input forms are hidden behind clicks or pop-ups, citing tests from Creative Market where visible forms performed better. They also highlighted the importance of privacy and trust signals for AI products that access sensitive data, noting that companies like Sarah Novus and Slashy are beginning to include dedicated trust and security links in their navigation. The reviewers argue that AI agents often prioritize aesthetic animations over user-centric clarity, leading to lower conversion rates. They advise founders to prioritize clear calls to action and specific user-focused copy over generic pitch-deck language, asserting that the real metric to track is whether the site converts.