Altera is an AI tool that assists salespeople on LinkedIn by generating hyper-personalized comments, in-mails, and posts. It allows salespeople to quickly write messaging that resonates with contacts and helps them close deals. The tool is a Chrome extension that integrates directly with LinkedIn and offers custom AI training, analytics, and automations. Users can try Altera for free with a 3-day trial, after which they can choose from different pricing plans based on their needs.