Run your small business — privately.
Most small businesses live across four or five workspace vendors: Slack for chat, Google Workspace for docs, Dropbox for files, Zoom for meetings, plus client email. Each one a separate vendor that can read your business's most sensitive content. Koaich consolidates the workspace surface and changes the architecture — one tool, one bill, one trust decision, and the vendor (us) can't decrypt any of it.
What you get
One workspace instead of five
Messaging, document collaboration, file sharing, AI-drafted content, external client delivery — all in one tool. Consolidate the vendor sprawl without giving up the surfaces your team uses every day.
Per-client vault isolation
Client A's communications and deliverables are mathematically separate from Client B's. Not by folder convention — by encryption. No accidental cross-leakage if a team member is added to the wrong shared folder.
Subpoena-resistant by architecture
If a competitor's legal team subpoenas your workspace vendor (us), what we can produce is ciphertext + account metadata. We can't produce your client communications, contracts, or financials because we don't hold the keys.
No enterprise-tier procurement
Workspace tools that hold customer-managed keys (Google CSE, Microsoft Customer Key) require $30–$57/user/month enterprise licenses plus a customer-run KMS. Koaich's encryption property is the same — and it's the default. No procurement journey, no Azure Key Vault to run.
Encrypted external delivery
Send an invoice, contract, or sensitive doc to a client who doesn't have Koaich. They receive an encrypted digest email; clicking opens a one-time decryption page. The vendor (us) and your client's email provider both see ciphertext only.
The underlying cryptography
Every claim above is grounded in a specific primitive. Not marketing.
- →nacl.box (X25519) for 1:1 client and team messaging
- →MLS (IETF RFC 9420) for per-client team rooms
- →Per-document symmetric keys, wrapped to each team member
- →WebAuthn passkeys for web; native passkey on mobile (in flight)
- →Shamir's Secret Sharing across owner's own devices for recovery
Get on the waitlist.
We're onboarding small business first. Read the architecture if you want detail.