Pick the better caption before the algorithm does.
Posting the wrong variant costs reach you can't get back. Drop both drafts — AI scores them on hook, emotion, platform fit, and brand voice — then picks the winner with rationale you can argue with.
WINNER · 85% confidence
Comparative scoring
Per-draft scores + confidence percent. No more coin flips.
3 reasons why
Concrete bullets — not 'Variant B is better'.
Best of both
AI merges the strongest parts into a drop-in caption.
How it works
Paste both drafts
Same post, two angles.
Pick platform
Scoring weights shift per platform.
Use the winner
Or use the merged version. Copy + go.
Built for
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Big launches where reach matters
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Settling team disputes objectively
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Training your gut on what works
Not sure if A/B Winner Picker is for you?
Inside the app, click Ask consultant (bottom-left) — get a tailored answer in any language, in seconds.
Try A/B Winner Picker free.
14-day Pro trial. No card. Every AI feature in MarketHub included.