Run your personal and business life.
Privately.
Message, share, collaborate, run a business — all in one place. All encrypted on your device with keys we never see. One tool for the parts of your life that aren't for sale.
Message
One-to-one, group rooms, family threads, client conversations. End-to-end encrypted by default — Slack-style functionality without Slack-style readability. Same property, same surface.
Collaborate
Documents, files, shared rooms. Per-vault key isolation so client A's data is mathematically separate from client B's. Adding a member re-keys; removing a member locks them out cryptographically, not by policy.
Run a business
Invoicing, scheduling, contracts, board materials, candidate intel — the parts of running a small business that today sit on a vendor's readable database. Move them under your own keys without giving up the workflow.
One workspace for all of it.
Most of us live across at least four workspace tools: a chat app for friends, a chat app for work, a doc tool for personal stuff, a doc tool for business. Each one a separate vendor. Each one a separate trust decision. Each one a separate breach vector.
Koaich is one workspace tool for everything. The same encryption shape — keys on your device, ciphertext on our servers — applies to the family group chat, the client deliverable, the contract draft, the board deck, the doctor's message, the negotiation thread. All under your control. All in one place.
If that sounds like compartmentalization in the wrong direction — "why put everything in one tool?" — the answer is: better one tool that can't read any of it than four tools that each can read some.
What "running it privately" looks like.
Runs a 12-person consulting firm. Uses Koaich for client communications, internal team chat, board updates, candidate intel, contract drafts. Same tool, per-client vault isolation, every vault encrypted under keys the team holds — not the vendor.
Uses one Koaich vault per patient. Session notes, intake forms, secure messaging for between-session check-ins. The architecture defends HIPAA confidentiality at the cryptography layer; the vendor (us) can't produce content under any legal demand because we don't hold the keys.
Medical decisions, financial logistics, legal paperwork, the difficult conversations among adult siblings. Koaich keeps it sealed — not because we promise not to look, but because we don't have the keys.
Source communications, draft material, financial details that haven't been published. Per-vault isolation keeps each story's material separate; metadata minimization (sealed-sender on the roadmap) closes the remaining gap.
Per-engagement vaults. Client A's deliverables, communications, and AI-drafted content stay mathematically separate from Client B's and Client C's. No accidental folder mixups, no cross-leakage even on shared infrastructure.
Some things change when you hold the keys.
Search runs on your device, against the data your device has. AI features compose context locally and only send the minimum to a model proxy. There is no "forgot password" — recovery routes through Shamir-split codes you set up, not through a master key we hold.
The convenience trade-offs are real. Some of them are small (a 2-second delay when you first unlock a vault); some are real lifestyle changes (you have to take backup seriously). For most professional and personal work, that's a price worth paying.
Where to go next, depending on what you care about.
Personal-life angle
Why Koaich for the parts of your day that aren't for sale — family logistics, sensitive correspondence, photos that aren't for general circulation.
Read →Business angle
For practices and small businesses where the client trusted you to keep their data confidential. Per-client vault isolation, subpoena-resistant by architecture.
Read →The architecture
Three-tier key hierarchy, MLS for groups, Shamir for recovery, WebAuthn for web. The full technical picture for engineering and security teams.
Read →Side-by-side
Koaich vs. Slack, Notion, Google Workspace, Microsoft Teams, Discord — and Koaich vs. SMS, WhatsApp, Messenger, LinkedIn, Signal.
Read →Run all of it. Privately.
Get on the Koaich waitlist. Invites going out in waves.