The vast majority of the OSINT community is interested in analyzing individuals. Well, so be it. I've prepared a selection of various bots and services for you (GB and others are not included in the list, as even the lazy know about them, and it's not really OSINT anyway).
In the RU segment, VK is the pioneer of social media analysis. Although Telegram has started to move away from being just a messenger, transforming into a social network and gaining more and more popularity, it still doesn't come close to the volume of potentially important information about a target.
— It's worth noting that VKontakte is already starting to die out, and in my opinion, in two or three years, analysis of it will no longer be as relevant as it once was. People are using it noticeably less often. Still, VK remains a key tool for analyzing a person's biography, interests, social circle, origin, etc.
1. 220vk — An old, good, and rather worn-out service that allows you to identify hidden friends, find out who the target has followed/unfollowed, and their interests based on subscriptions to communities and people (with a timeline), as well as what changes have been made to their profile, etc.
2. VKHistoryRobot — A Telegram bot that gives you an idea of what a profile looked like in the past(very useful if the profile is private). It provides information in the form of a brief dump: Full Name; URL; photo.
3. FindClone, search4faces — reverse image search services for VK that allow you to search for a profile using an uploaded photo. Of these two, search4faces is free.
4. Social Graph Bot — a Telegram bot that allows you to build relationship graphs among a list of friends. With this tool, you will understand how diverse the social circle is, who among the friends is a relative, etc.; whether the account is legitimate and if it has connections to any group of people. (There are many applications, here is a guide from habr for you)
You can find even more interesting and educational content on my Telegram channel — @secur_researcher