plenz is an open-source browser extension that acts as a real-time co-pilot for AI prompts. It helps you write better, more effective prompts by providing inline suggestions and one-click refinements. Built with a privacy-first, BYOK (Bring Your Own Key) model, it works across major AI chat platforms like ChatGPT, Claude, and Gemini.
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Maker
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Hey Product Hunt 👋,
I built plenz because I kept seeing the same pattern in AI workflows: the model was getting blamed for weak output when the real issue was usually a vague prompt upstream.
plenz helps improve prompts inline before you hit send, inside the workflow people already use. The goal is simple: better first-pass output without pushing users into a separate prompt editor.
What makes it different:
- inline prompt refinement
- open source
- BYOK and provider choice
- privacy-first setup without a required central plenz prompt-processing backend
I would especially love feedback on:
1. whether the inline suggestion flow feels genuinely helpful
2. whether setup is clear enough for a first-time user
3. which platform or provider we should prioritize next
Happy to answer anything and ship fixes based on feedback.