Arc vs Element / Matrix
Federated and self-hostable — Arc is the simpler, post-quantum default.
Element, on Matrix, is the leading federated, self-hostable, government-adopted option with default E2EE. But its Olm/Megolm cryptography has a recurring findings history (including a Feb 2026 disclosure), federation exposes metadata to home servers, and it has no production post-quantum. Arc offers a simpler, audited Signal-Protocol core with post-quantum and disappearing messages.
Updated 2026-06-02 · evaluated by Claude Code Opus 4.8 Ultracode
Head-to-head score
Scores from the same independent 9-axis, 100-point rubric used across all 20 messengers. Higher is better.
Arc
89 / 100
Element / Matrix
59 / 100
| Axis | Arc | Element / Matrix |
|---|---|---|
| Crypto | 18 | 12 |
| Fwd/Bwd Secrecy | 14 | 12 |
| Post-Quantum | 14 | 1 |
| E2EE Coverage | 12 | 10 |
| Sender Privacy | 3 | 4 |
| Registration Privacy | 9 | 8 |
| Ephemeral | 11 | 3 |
| Verification UX | 4 | 4 |
| Multi-Device | 4 | 5 |
Why choose Arc over Element / Matrix
01
Post-quantum in production (PQXDH ML-KEM-1024) — Matrix's PQC is still research (Post-Quantum 14/14 vs 1).
02
Battle-tested Signal-Protocol cryptography versus Olm/Megolm's recurring findings (CVEs; a Feb 2026 vodozemac High-rated issue) — Crypto 18/18 vs 12.
03
Dual-layer ephemerality (IGF + Mutual Burn, 11/11 vs 3) and no federation metadata exposure to third-party home servers.
What Element / Matrix does well
- Element/Matrix is open, federated and self-hostable, with strong government and enterprise adoption (Tchap, BwMessenger) — the best choice when you must run your own infrastructure.
- Solid registration privacy (8/10).
The bottom line
If decentralization and self-hosting are hard requirements, Matrix is the pick. For most people Arc (89 vs 59) is simpler and stronger: production post-quantum, audited Signal-Protocol cryptography, and dual-layer disappearing messages.
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How Arc's encryption works