TorChat is a decentralized anonymous instant messenger that uses Tor hidden services as its underlying network. It provides cryptographically secure text messaging and file transfers.
License: Open Source
Signal is primarily focused on secure messaging with strong encryption and user privacy, requiring a phone number for registration. In contrast, Torchat emphasizes anonymity and decentralization, allowing for secure messaging without the need for personal information, but it requires the use of the Tor network.