PhantomBuster is a browser-automation platform built around 'Phantoms' - cloud automations that act on web platforms, especially social networks like LinkedIn. Phantoms can extract profiles and lists, send connection requests, and run message sequences, and you can chain them into workflows that scrape leads, enrich them, and reach out. The automations run in the cloud on a schedule, so they keep working without your machine on.
PhantomBuster's center of gravity is social-network automation and outreach. It is strongest when your motion is built around LinkedIn and similar platforms - capturing profiles, growing a network, and sequencing messages. Because those platforms have their own terms and increasingly strict anti-automation systems, operating Phantoms responsibly is part of the workflow you own.