Two comparisons. Different decisions.
We split workspace vs. personal messaging because they ask different questions. For workspace tools, the question is who reads your documents. For messaging apps where content is usually already E2E, the question is who runs the service and what their business depends on.
Our research process and full source list per vendor: /methodology
Koaich vs. Slack, Notion, Google, Microsoft, Discord.
Five tools your team uses for work. Who holds the keys to your messages, documents, and files. Side-by-side architecture comparison with what changes on a bad day.
Koaich vs. SMS, WhatsApp, Messenger, LinkedIn, Signal.
Five apps in your phone's dock. The cryptography for content is genuinely fine across modern E2E apps — the comparison that matters is operational: business model, identity coupling, metadata posture.
The full comparison matrix — as open data.
All 10 vendors across 15 privacy-architecture attributes in one table. Free to reuse with attribution; machine-readable JSON included.
The analysis and viewpoints on this page are based on Koaich's internal review of each vendor's publicly available documentation, marketing claims, transparency reports, and disclosed incidents at the time of writing. These viewpoints have not been independently audited. Vendor capabilities, terms, and architectures change. If a specific claim here is inaccurate or out of date, please write to hello@koaich.com and we'll review and correct it.
See /methodology for our research process and the full list of sources we cite per vendor. Legal disclaimer at /terms.
Why split?
We tried combining both on one page. It blurred the framing.
A CISO comparing Koaich to Slack wants to know about key custody, document encryption, and subpoena disclosure ceilings — workspace-tool questions. An individual comparing Koaich to WhatsApp wants to know about Meta's business model, phone-number identity, and metadata flowing into an ad-targeting graph — messaging-app questions. The matrices that answer each are different. The vendor cards that frame each are different.
One page per audience, each tuned for that decision.