Notidem — thoughtful replies for LinkedIn

The opposite of 'idem'. Draft genuine, on-brand LinkedIn comments and replies in your own voice, always reviewed by you.

Notidem is the opposite of sending a lazy "idem", "great post!", or "totally agree". Relationships don't grow from templates or robotic comments. They grow from specific, human responses. Notidem is a privacy-first Chrome extension that lowers the friction of writing thoughtful LinkedIn comments and message replies — in your own voice, using your profile context, with you always in complete control. NOTE: Notidem is a drafting assistant, not an automation tool. It never auto-posts, auto-sends, mass-messages, or scrapes in bulk. You read, edit, and click send on every single draft yourself. ★ KEY FEATURES • FEED COMMENTS Open any LinkedIn post, click the Notidem button by the comment box, select your goal (add an insight, share a personal experience, ask a question, agree and build on it, or offer a respectful counter-point), and get a draft tailored to the post and your background. • MESSAGE REPLIES In any message thread, Notidem reads the visible conversation history and helps you draft a context-aware response (reply naturally, thank, propose a next step, answer a question, or politely decline). • YOUR TRUE VOICE Set up a short profile and optionally upload your résumé. Notidem uses it as quiet background context to capture your tone and experience. It never copies and pastes your CV back into a comment; it just uses it for credibility and context. • BRING YOUR OWN KEY (BYOK) Use your own API key from OpenAI, Anthropic, Gemini, or Groq. You pay only for your exact usage directly to your provider. There is no middleman Notidem server. ★ PRIVACY & SECURITY FIRST • Local & Offline: All your settings, keys, profile data, and history are stored only on your device in secure local storage. • Encrypted at Rest: Your API keys are encrypted with AES-GCM (Web Crypto API) before being saved. • Isolated and Secure: The API key never touches the LinkedIn page. All API requests happen inside the extension's isolated background worker, protected from third-party scripts. • Zero Tracking: No account creation, no analytics, no cookies, no tracking, and no external Notidem server. ★ COMPLIANCE • Designed to respect LinkedIn's User Agreement. By keeping a human in the loop for every single post and using a synthetic paste event that routes text safely through LinkedIn’s own rich-text editor model, Notidem functions at a human pace and does not trigger platform red flags.