Ranked in these QuestionsQuestion Ranking
Pro Provides security and privacy
Signal uses an advanced end to end encryption protocol that provides privacy for every message every time.
Pro Free and open source
Signal is Free and Open Source, enabling anyone to verify its security by auditing the code. TextSecure is the only private messenger that uses open source peer-reviewed cryptographic protocols to keep your messages safe.
Pro Recommended by Edward Snowden
Edward Snowden uses this messenger and recommends it to everony who is concerned about his privacy.
Pro Supports sharing of various different media types
Signal supports: emoji, pictures, videos, audio, contacts, your location and GIF.