Microsoft Teams alternatives7 min read•
Secure Microsoft Teams alternative for law firms
Why privileged conversations need a platform that cannot read them, and how a zero-knowledge workspace fits a firm's confidentiality obligations.
Try it in one click.
Three private surfaces. Same zero-knowledge architecture.
Privilege is about who can read, not who promises not to A firm's duty of confidentiality does not distinguish between an employee reading a file and a vendor's system being technically able to. Regulators and clients increasingly ask the second question directly in security questionnaires: can your provider access matter content?
On a platform whose governance features require readable content, the honest answer is yes, technically.
What changes with a zero-knowledge workspace - Matter conversations and documents are sealed on the device before upload. - The provider relays and stores ciphertext; there is no support path to plaintext. - A subpoena served on the provider can only surface metadata, because nothing else exists in a readable form. - Removing an associate or a contractor rotates keys instead of flipping a permission.
A structure that maps to how firms actually work - One room per matter, membership limited to the matter team, plus a general firm channel. - One Team Drive folder per matter, with the folder key sealed individually to each member. - Counterparty and client exchange through passphrase-gated links that expire within 24 hours at most, with the passphrase sent on a different channel. - An immutable security log of access events — metadata only — for internal review.
Conflicts, ethical walls and lateral hires Per-member sealed keys make ethical walls concrete. A lawyer who is not in the matter room does not merely lack a permission; they lack the key. When someone moves between matters, membership changes trigger rotation, so historical content does not silently follow them.
Client onboarding and questionnaires Two answers tend to end the conversation quickly: - "Our provider cannot read matter content; keys are derived on our devices." - "Links to client documents expire within 24 hours and require a passphrase."
The trade-offs to raise internally - No provider-side eDiscovery over message bodies. Discovery must be run from the endpoints of the matter team. - No password reset that recovers data. Recovery kits must be issued and stored, and that process needs an owner. - Retention obligations that require tenant-wide search should stay on the governed platform.
How DRIVUNO implements it Argon2id key derivation on the device, X25519 for per-member key wrapping, XChaCha20-Poly1305 for payloads, blind-index search computed locally, per-member sealed Team Drive folder keys with rotation on removal, hardware-backed passkeys and TOTP for account access, and a metadata-only immutable audit trail.
Try it in one click.
Three private surfaces. Same zero-knowledge architecture.