If you're looking for a service to spot and purge suspicious followers from your Twitter account, TwitterAudit is a good option. It offers a range of tools to spot fake and bot followers, track follower growth and measure engagement. With its detailed analytics, TwitterAudit helps you keep your account's reputation intact by giving you a better idea of who's actually listening and engaging with your tweets.
Another good option is Loti, which is geared more toward detecting and removing infringing content and fake accounts. Loti's No Fakes feature scans daily to remove fake social media accounts and endorsements, so public figures and creators can have a legitimate following. It's a good option for those who want a one-stop shop to keep their digital life in order.