Payment failed. Cart abandoned. Trial ending. We handle the recovery: copy, timing, channel. And learn what works.
AI generates copy variations, tests them with real traffic, and promotes winners automatically.
payment.failed3 distinct variations generated for every workflow automatically
Finds winners 3x faster than traditional A/B testing
Winners promoted, losers retired - runs forever without you
Workflows that adapt to the user, the context, and what's worked before.
payment.failedcart.abandonedDeploy any workflow with one API call
await fbf.track("payment.failed", userId);Pick your vertical. Trigger events. Watch workflows fire in real-time.
11 workflows
11 workflows
10 workflows
10 workflows
10 workflows
11 workflows
No code required. See workflows in action.
Open PlaygroundLegacy tools make you do the work. Fourbyfour does it for you.
Traditional Tools
Manual setup, manual optimization
Fourbyfour
Thompson Sampling optimization
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Free to start. No credit card required.
Set your goal once. AI handles variations, testing, and optimization forever.
Multiple versions of copy, timing, and channels tested automatically.
Winners promoted, losers retired. No manual A/B test management.
Every variation tracked to conversions and dollars. See what actually works.
One integration. AI handles the rest: copy, timing, channel, optimization.