X announced that it's shutting down the Circles feature that allows users to share posts with a select number of users. The feature will be deprecated by the end of October this year.
Twitter circle RSS
Twitter has confirmed that a security breach caused Twitter Circle tweets to be accessible to everyone. Meant for a select group of people, Circle tweets were viewable to everyone for almost a month.
Twitter has started rolling out Twitter Circle to more users worldwide. The feature allows users to define a set of people and publish tweets that are visible only to people who are in the circle.
Twitter is testing Twitter Circle, a free feature that will allow users to send out Tweets to up to 150 people. These limited-visibility Tweets can be muted, but users cannot remove themselves.