Modifying direct message (DM) communication membership is described. A communication platform can receive, in association with a DM communication associated with a first group of users and from a user computing device of a user of the first group of users, a first request to modify the first group of users. The communication platform can send, to the user computing device, a second request to designate whether to include context data associated with the DM communication in a new channel. Based at least partly on receiving an indication to include at least a portion of the context data associated with the DM communication in the new channel, the communication platform can generate the new channel, wherein the new channel is associated with a second group of users different than the first group of users, and at least the portion of the context data is associated with the new channel.