AltDentifier Discord Bot
Protection against spambots and alt accounts. Website: https://altdentifier.com Privacy Policy and Terms of Service: https://altdentifier.com/tos
People add AltDentifier to their servers mainly for verification, and it also handles utility and anti-raid & anti-nuke. Its invite asks for no permissions at all. About 170,000 servers use it. Tools like this matter most once a server grows past a few hundred members. No owner has claimed this page yet, so the details come from public listing data. It has been on Discord since 2017.