Collaboration8 min read•
The encrypted alternative to Slack + Dropbox: what it takes to replace both
Teams run chat in one product and files in another, and both providers hold the keys. Here is what a single zero-knowledge workspace has to solve to replace them.
Try it in one click.
Three private surfaces. Same zero-knowledge architecture.
Two products, one shared weakness Almost every company runs the same pair: a chat product for conversations and a storage product for files. Both are excellent, and both are built on the same assumption — the provider holds the keys. That assumption is what enables server-side search, previews, moderation, admin recovery and third-party integrations. It is also what makes a breach, a compelled disclosure or an over-permissive bot into a content incident rather than a metadata incident.
What "encrypted" means in each product - **In transit**: everyone does this. It protects the network, not the vendor. - **At rest**: the disks are encrypted, but the service decrypts on demand, so it protects against a stolen drive, not against the service itself. - **End-to-end / zero-knowledge**: keys exist only on user devices. The server stores ciphertext and sealed key envelopes and can never produce plaintext.
Most business tools stop at the second level for message history and file contents, even when they advertise end-to-end encryption for calls.
The five hard problems of replacing both 1. **Search.** Without server-side indexing, search has to happen with blind indexes computed on the device, so the server matches opaque tags and the browser decrypts the hits. 2. **Membership.** Group content needs a key sealed per member. Adding someone is a new envelope; removing them has to rotate the rest. 3. **Large files.** Builds and masters need chunked, resumable, verified uploads — encryption must not turn a 300 GB transfer into a gamble. 4. **External sharing.** People without accounts still need access, which means keys carried in the URL fragment plus a passphrase, expiry and revocation. 5. **Speed.** If channel switching, media loading and search feel slower than the incumbent, the team will route around the tool, and routing around it is the actual leak.
What you give up, honestly You lose server-side content features: provider-side previews of everything, workspace-wide plaintext discovery, and integrations that expect to read your messages. You also lose password reset — a provider that cannot read your data cannot restore it, which is why an offline recovery kit matters.
What you gain A breach of the provider yields ciphertext. A legal request yields metadata. An internal support tool cannot open a channel. Offboarding is one cryptographic action instead of a checklist across two vendors. For teams whose work would be damaging in public — studios, agencies, legal, finance, R&D — that trade is straightforwardly worth it.
How to evaluate a candidate Ask three questions and ignore the marketing: can an administrator read a private channel; what exactly does the server hold when a message is sent; and what happens cryptographically when a member is removed. The answers tell you whether you are buying zero-knowledge or a privacy policy.
Try it in one click.
Three private surfaces. Same zero-knowledge architecture.