Sicher is a freeware instant messaging application for iOS, Android, and Windows Phone. Sicher allows users to exchange end-to-end encrypted text messages, media files and documents in both private and group chats. Developed by SHAPE GmbH
License: Commercial
ChatSecure is primarily focused on secure messaging and supports multiple protocols, while Sicher emphasizes end-to-end encryption and includes features for voice and video calls. Both prioritize user privacy, but their use cases differ, with ChatSecure being more versatile for various messaging protocols.