Retention Lab scores your scripts and videos, calls a plain STRONG / OK / WEAK verdict, and hands you a ranked list of fixes — so you can rewrite the weak parts before you publish, not after.
Bring your own model provider key — runs use your key and are billed by your provider, not by us.
Most tools ask "will my followers like this?" Retention Lab tests your content against a mixed audience of strangers and adjacent viewers — the ones who decide whether a video ever reaches your followers at all.
Every test returns a Viral Readiness score and a plain STRONG / OK / WEAK verdict, plus a ranked list of the fixes most likely to move it. It's a prediction, not a guarantee.
Personas model a mixed feed of strangers and adjacent viewers — not just your existing fans — so you see whether your hook holds up with people who don't already follow you.
Iterate on a script, run it again, and see side-by-side how the score, behavior signals, and top fixes changed between versions.
A plain verdict every time
Personas for a quick read (up to 20,000)
Fixes to prioritize your rewrite
Compose a test, run it against a mixed audience, and get a clear read on how your content is likely to land in minutes.