End-to-end encrypted collaboration tools compared (Teams, Google Chat and more)
A neutral comparison framework for encrypted collaboration platforms, plus how the mainstream suites and the encrypted options actually differ.
Try it in one click.
Three private surfaces. Same zero-knowledge architecture.
A framework you can reuse Score each platform on eight criteria. No weighting tricks — just answer honestly for your own risk model.
- Key derivation: on device with a memory-hard KDF, or server-side?
- Content readability: can the provider read messages and files?
- Admin export: can an administrator produce content?
- Search: server-side plaintext index or device-side blind index?
- Files: encrypted before upload, with client-side previews?
- Membership changes: key rotation or permission flag?
- External sharing: passphrase, enforced expiry, revocation?
- Recovery: what exists offline so a lost password is survivable?
How the categories score **Microsoft Teams / Google Chat.** Excellent administration, integration and governance. Content is readable server-side by design; admin export exists; search is server-side. End-to-end coverage is limited or absent for channel content.
Slack. Same architectural position as above, with a strong app ecosystem.
Signal. Full marks on encryption and key handling; not a team file workspace.
Element / Matrix. Genuine end-to-end rooms, self-hosting, federation; operational burden and device-verification learning curve; file workspace is basic.
Encrypt-then-upload tools. Strong for files on top of any storage; no conversations, no sharing UX, no team key management.
Zero-knowledge workspaces. Encryption on device across messages and files, per-member key wrapping, device-side search. Fewer integrations with mainstream suites; no provider-side content features.
The criteria people forget - **Offboarding.** Most breaches of confidentiality are ex-members, not hackers. Ask whether removal rotates keys. - **External sharing lifetime.** Links that live forever are the most common accidental leak. Enforced short expiry is worth more than most cryptographic details. - **Backups.** Encryption without independent restorable backups converts confidentiality risk into availability risk. - **Endpoint reality.** No platform protects a compromised laptop. Pair encryption with device management and hardware-backed keys.
Where DRIVUNO lands on the eight criteria Argon2id on device; provider cannot read content; no admin content export; HMAC blind-index search computed locally; files encrypted before upload with client-side previews; key rotation on member removal; passphrase-gated links with a hard 24-hour maximum; recovery kits plus hourly encrypted snapshots to independent immutable storage.
How to run the evaluation Send the eight questions to each vendor in writing. Compare the answers, not the marketing pages. Vendors who answer precisely have thought about it; vendors who answer with "bank-grade encryption" have not.
Try it in one click.
Three private surfaces. Same zero-knowledge architecture.