Hey Product Hunt I built Shiftr because posting consistently is hard, and every AI tool that's supposed to help makes you sound like everyone else. You paste your idea into ChatGPT, get something polished and generic back, and spend more time stripping out the "AI voice" than you would've spent just writing it. I wanted the opposite: something that helps me write posts in my own voice, right in the composer, without leaving the page. So that's Shiftr. You define a persona once — your bio, your style, a few of your real posts as examples — and bind it to whatever model you want. Then when you open the post composer on LinkedIn, X, Reddit, or YouTube, a button's right there. Drop in a rough idea, generate, and it comes back sounding like you wrote it. (It does comments and replies too, but writing posts is the heart of it.) A few things I care about that might matter to you: - Bring your own model. Anthropic, OpenAI, Groq, OpenRouter, or local via Ollama. Different personas can run on different models. - No telemetry. Your personas, keys, and drafts never touch my servers — because I don't have any. It all stays in your browser. - Free to start. One persona, one provider, full functionality. Pay once ($49, lifetime) when you want more. I use it for my own posting every day, and I'm building it in the open. Would genuinely love your feedback — especially what breaks, what's confusing, and what you wish it did. I'm here all day.

Shiftr - AI Post Helper

Social media ghostwriting chrome extension.

Social media ghostwriting chrome extension.