Socialnib

Socialnib is a Chrome extension for X / Twitter that writes a reply draft as soon as you click into an empty reply box. It reads the post and the surrounding thread, writes a batch of 8 replies in different tones, scores them against the goal you've set, and inserts the top one. You read it, edit it if you want, and press Reply yourself. It never posts for you.

Setup is a Google sign-in. Socialnib runs the model on its own servers, so you don't need an API key or a model picker. There are 20 tones, including Founder, Technical, Hot Take, Contrarian and Trader, and each comes in two shapes: one that ends on a question and one that doesn't. You can see every reply from a batch in a keyboard-navigable table or trigger a draft with ⌘⇧Y. Voice settings let you fix a default tone, your stack and house rules for every draft.

The extension only writes into an empty box and stops if you start typing mid-write. History, favourites and settings are stored locally in your browser, and the company says replies aren't used for training. The first 100 generations are free with no card. Pro costs $8 a month for 1,000 generations.