Koaich vs. Signal
The encrypted messaging standard.
What Signal optimizes for
Signal's bet is privacy-by-architecture for personal messaging. Same trust model as Koaich. Different product surface.
- ·End-to-end encrypted messaging by default — same cryptographic primitives Koaich uses
- ·Public track record of producing only metadata under data requests
- ·Free; non-profit; cannot expand into documents/files/workspace surface by design
Where Koaich is different
Different products: Signal is messaging-only. No documents, no file workspace, no AI agents, no per-vault isolation, no external-email recipients. If all you need is encrypted 1:1 and group chat, Signal is the right answer.
Pick Signal when
All you need is encrypted personal messaging — no documents, no files, no group workspaces, no email-bridged delivery.
Pick Koaich when
You need the same privacy property across documents, files, group rooms, AI drafts, and email-bridged recipients.
Questions people ask about Signal and Koaich
Is Signal a workspace tool?
No. Signal is a one-to-one and group messaging app — there are no documents, no file workspaces, no AI features, no per-vault isolation, no email-bridged delivery. It is purpose-built for messaging and stays in that lane by design.
What does Koaich offer that Signal doesn't?
Documents and files (encrypted), group rooms with per-vault key isolation (so a member churn re-keys only the affected vault), AI features that run on-device against decrypted content, and an encrypted-digest mechanism for delivering messages to recipients without a Koaich account.
Does Koaich use the same cryptography as Signal?
Koaich uses the same cryptographic primitives — Curve25519, ChaCha20-Poly1305, the X3DH key agreement — for one-to-one messaging. Group rooms use the IETF MLS protocol (RFC 9420), which provides equivalent properties at group scale.
When should I pick Signal over Koaich?
If all you need is encrypted one-to-one or group messaging — no documents, no files, no workspace structure, no email-bridged delivery — Signal is the right answer. Koaich starts to matter once your work needs the same encryption property applied to documents, files, and group rooms.
Switching from Signal?
Get on the waitlist. Invites are going out in waves.