Is signal previous name textsecure ? Those who dropped SMS support of their secure texting application so now it requires a data plan to be remotely useful.

That's about when Openwhisper / Signal lost me, I'm not gonna trust them with anything anymore. Also worth mentioning that all communication go through a single point of failure central server, it requires a phone number to register and is not available outside the worst privacy offender device: smartphones.

You can chose your identifier (not linked to a phone number). On the other side they are closed source.