Platform Comparison
Why agencies choose IMCS
A direct comparison against the two most commonly considered alternatives in government and defence procurement.
| Capability | Element ESS | Microsoft Teams | IMCS |
|---|---|---|---|
| Deployment & Sovereignty | |||
| On-premises deployment | Limited | ||
| Air-gap / no internet | — | — | |
| Data residency — your jurisdiction | — | ||
| Zero third-party cloud | — | ||
| Federation model | Matrix (open) | Teams only | Closed (approved only) |
| Encryption & Security | |||
| End-to-end encryption | Transport only | ||
| Post-quantum encryption (active) | Roadmap | — | ML-KEM-768 live |
| FIPS 140-3 compliance | Partial | GCC High only | |
| Hardware-backed keys | Varies by client | — | |
| Traffic relay (no traffic analysis) | — | — | |
| Screenshot prevention all platforms | Limited | — | |
| Classification & Compliance | |||
| Classification labels | — | — | |
| ISO 27001 certified | In progress | ||
| Immutable audit log | Basic | Cloud-only | |
| Legal hold + eDiscovery | — | ||
| UK GDPR data residency | UK region option | ||
| Communications | |||
| Encrypted voice + video | |||
| Conference participants | 50+ | 1000+ | 150+ E2EE |
| Message expiry (per message) | — | — | |
| Self-hosted SFU | — | — | |
| Satellite / low-bandwidth | Basic | — | |
| Platforms | |||
| iOS / Android / Windows / Web | |||
| Linux desktop client | Web only | ||
| MDM / enterprise deployment | |||
| Commercial Model | |||
| Licensing model | Subscription / ESS | Per-user | Perpetual licence |
| Ongoing cloud fees | Optional | Required | None |
| Protocol | Matrix (open) | Proprietary | Signal Protocol + PQ |
| Source availability | Open source | Closed | Commercial / auditable |
| Request Demo → | |||
Information based on publicly available documentation as of April 2026. Element ESS refers to Element Server Suite Pro. Microsoft Teams based on GCC offering. IMCS ISO 27001 certification in progress — expected H2 2026.
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