Hey humans 👋

Getting feedback from real humans is painful and time-consuming. Most product and engineering teams don't even bother unless they really, really have to - so we ship on gut feel and find out what's broken from users (or churn) later.

I built Smack to close that gap. Point it at any local or public URL - or a Figma prototype - and it spins up a swarm of unique AI personas that actually navigate your product. Each one has its own background, goals, and tech-literacy, so they get confused in different places, hit different blockers, and form their own opinions. They even debate each other before a report agent synthesises everything into a structured UX report you can act on.

A few things I'm proud of:

🧠 Runs entirely on-device - your URLs, designs, and findings never leave your machine
🎭 Genuinely distinct personas - not one model's hot take five times, but real disagreement
⚡ Works on localhost - test builds before they're live

Call it vibe feedback if you like. 😄

Would love to hear what you'd point it at first - and what would make it more useful for your workflow.

Smack AI

Real opinions. Zero humans.

Real opinions. Zero humans.