Sentrly
Encrypted Messengers Compared
Default end-to-end encryption, metadata, multi-device, and account requirements.
For most readers, Signal is the simplest E2EE-by-default choice. iMessage is fine inside Apple's ecosystem. WhatsApp is E2EE for content but collects the most metadata. Matrix and Session offer different trade-offs around federation and metadata avoidance.
All major messengers now offer some form of end-to-end encryption (E2EE), but the defaults and metadata stories differ. We focus on technical properties available from public documentation; check each app's current docs before relying on a specific behavior.
| Signal | iMessage | Matrix (Element) | Session | ||
|---|---|---|---|---|---|
| E2EE by default | Yes | Yes (Apple-to-Apple) | Yes | Yes (in supporting clients) | Yes |
| Account requirement | Phone number | Apple ID | Phone number | Email or username | None (random ID) |
| Open-source clients | Yes | No | Partial | Yes | Yes |
| Open-source server | Yes | No | No | Yes (federated) | Yes |
| Multi-device | Yes (linked devices) | Yes (Apple devices) | Yes (linked devices) | Yes | Limited |
| Metadata minimization | Strong | Moderate | Weakest of the five | Depends on home server | Strong (onion routing) |
| Disappearing messages | Yes | Yes (recent versions) | Yes | Yes | Yes |
| Best for | Default secure messenger | Friends and family inside Apple | Reaching the largest user base safely | Federation-friendly orgs and communities | Avoiding identifiers entirely |
Frequently asked questions
Is iMessage really end-to-end encrypted?
Yes between Apple devices, with optional Advanced Data Protection extending it to backups. SMS fallback (or RCS without E2EE) is not E2EE.
Why does WhatsApp score lower on metadata?
Because it shares some metadata with its parent company by default, and ties accounts to phone numbers. Content remains encrypted; the question is who knows you talked to whom and when.
Is Session worth using?
If avoiding any identifier is your goal, yes. If you want to reach mainstream contacts, no — the network is much smaller.
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