In-Depth Analysis

Messenger Reviews

Every major messaging app evaluated against our 18-point framework. Scores updated with each major release.

Signal

Secure Open Source Free
9.4 / 10
Excellent
Scores
Security9.8
Privacy9.7
Features8.2
Usability8.5
Performance9.0
Feature Checklist
End-to-end encryption (all messages)
Open source (auditable code)
Disappearing messages
Sealed Sender metadata protection
No ads, no data monetisation
Limited cloud backup options
Smaller user base than WhatsApp
Platforms: iOS · Android · Windows · macOS · Linux
Updated Mar 2026

Telegram

Popular Free / Premium
8.7/ 10
Great
Scores
Security7.8
Privacy7.4
Features9.5
Usability9.1
Performance9.2
Feature Checklist
Secret Chats with E2E encryption
Channels & Groups (up to 200 000)
Bots & automation API
Cloud sync across all devices
Default chats not E2E encrypted
Partially closed-source server
Data stored on Telegram servers
Platforms: iOS · Android · Windows · macOS · Web
Updated Feb 2026

WhatsApp

Popular Meta Free
7.8/ 10
Good
Scores
Security8.2
Privacy6.5
Features8.0
Usability9.0
Performance7.8
Feature Checklist
Signal Protocol E2E encryption
Massive global reach (~2.9 bn users)
Voice & video calling
Metadata shared with Meta
Closed source
Requires phone number
Platforms: iOS · Android · Windows · macOS · Web
Updated Jan 2026

Discord

Community Free / Nitro
8.2/ 10
Great
Scores
Security7.5
Privacy7.0
Features9.4
Usability8.8
Performance8.5
Feature Checklist
Rich community server features
High-quality voice & video
Screen sharing & streaming
No E2E encryption by default
Extensive data collection
Not suited for private 1-on-1 comms
Platforms: iOS · Android · Windows · macOS · Linux · Web
Updated Feb 2026

iMessage

Secure Apple Ecosystem
8.1/ 10
Great
Scores
Security8.8
Privacy8.2
Features8.0
Usability8.8
Performance7.9
Feature Checklist
E2E encryption (iMessage protocol)
Seamless Apple device integration
RCS support (iOS 18+)
iOS/macOS only — no cross-platform
iCloud backups weaken E2E guarantees
Closed source
Platforms: iOS · macOS · iPadOS
Updated Mar 2026

Threema

Secure Paid
9.1/ 10
Excellent
Scores
Security9.6
Privacy9.5
Features8.0
Usability8.5
Performance8.8
Feature Checklist
No phone number required
Anonymous sign-up (Threema ID)
Open source (since 2020)
Swiss-hosted, GDPR compliant
One-time purchase fee
Smaller user base
Platforms: iOS · Android · Windows · macOS · Web
Updated Jan 2026

Microsoft Teams

Business Free / M365
8.0/ 10
Great
Scores
Security8.4
Privacy7.2
Features9.0
Usability7.8
Performance7.9
Feature Checklist
Deep Microsoft 365 integration
Enterprise compliance & eDiscovery
Meeting recordings & transcripts
Heavy resource usage
No E2E for general chats
Complex admin for smaller teams
Platforms: iOS · Android · Windows · macOS · Web
Updated Feb 2026

Viber

Popular Free
7.5/ 10
Good
Scores
Security7.8
Privacy7.0
Features7.8
Usability8.0
Performance7.2
Feature Checklist
E2E encryption by default
Communities & channels
Free international calls
Data shared with Rakuten group
Ad-supported free tier
Closed source
Platforms: iOS · Android · Windows · macOS
Updated Dec 2025

Scores reflect our independent assessment at the time of review. App features and privacy practices change — always check the current version and privacy policy before making decisions based on security-sensitive use cases.