Splera - A/B Testing for Vibe Coders

Run A/B tests on apps you build with Replit. Splera detects UI changes, suggests experiments, and wires up tracking automatically.

Splera turns the apps you vibe-code on Replit into experiments you can actually trust. Most indie builders ship by gut feel because setting up an A/B test takes hours you don't have: wiring analytics, writing variant logic, computing significance. Splera collapses all of that into a Chrome extension that rides along with you inside Replit. HOW IT WORKS 1. Keep building on Replit like normal. When you ask your AI agent to change a button, headline, or color, Splera's extension detects the change in the diff. 2. Splera suggests a testable hypothesis (powered by Claude). You review it in one click. 3. Splera injects a prompt back into your Replit chat that tells the AI exactly how to wire up the Splera SDK, set up the two variants, and start tracking conversions, no copy-pasting script tags, no analytics plumbing. 4. Visitors are split 50/50 between the two versions. Splera collects conversion events in the background. 5. When enough data is in, Splera tells you which version wins using Bayesian statistics (built for the small sample sizes indie apps actually see, not the "you need 10,000 visitors" frequentist math). 6. One click "Ship Winner" and Splera injects a cleanup prompt into Replit that tells your AI which version to keep and removes the tracking code. WHO IT'S FOR Solo builders, indie hackers, and product-minded founders shipping on Replit who want real data behind their decisions but don't want to become statisticians or analytics engineers. WHAT MAKES SPLERA DIFFERENT • Built for vibe coders- no code changes by you, just prompts for your AI agent • Works with Replit out of the box (more platforms coming) • Bayesian stats tuned for small-sample apps- decide at 50 visitors, not 10,000 • Full experiment lifecycle- pause, resume, ship the winner, or stop entirely • Free during beta Sign in with Google, install the extension, and ship with proof. Learn more at https://splera.app