Solo founder shipped PromptProbe this week. Free tool. No VC, no launch team. Just a real problem he kept hitting while building AI workflows.
The problem everyone recognizes but nobody talks about: you test a prompt once, it looks fine. Then it behaves differently in production. Not always. Just enough to wreck trust in your pipeline.
PromptProbe runs the same prompt multiple times and highlights exactly where outputs diverge. You see instability before it ships instead of after.
Here’s the twist though. After talking to actual AI builders, the creator started realizing that wording consistency might not even be the real issue. Action consistency and decision consistency matter more. Your prompt says “classify this.” But does it classify the same borderline case the same way every time? That’s what kills production workflows.
How to use it:
- 🔁 Paste your prompt into PromptProbe
- 🔍 Run repeated-run testing against your actual inputs
- 📊 Review the divergence map. Look for decision drift, not just wrong answers
- ⚡ Tighten the prompts that drift. Ignore the ones that vary but land correctly
Pro tip: The dangerous failures are not the ones that return garbage. They are the ones that return slightly different reasonable answers. Those are invisible until something downstream breaks.
Free to try at promptprobe.tech 🚀
Shipped my first SaaS — PromptProbe (free)
by u/Organic_Release1028 in PromptEngineering