Channels, threads & search
How this is scored
The daily surface: channel model, threading, mentions, files, and whether search can find a decision made eighteen months ago.
0 — Flat group chats with no threads; search covers recent messages only, and history is capped.
3 — Channels and direct messages with basic search, but threading is awkward or absent and file handling is a plain attachment list.
5 — Public and private channels, real threads, mentions and reactions, file sharing with previews, and full-text search across the whole history.
8 — Cross-organisation or guest channels with clear boundaries, message editing history, pinned and saved items, search with filters by channel, person and date, and a documented history limit or none at all.
10 — The archive is a working knowledge base: search that ranks well across years, threads that stay readable, channel lifecycle management (archive, rename, merge) without losing history, and export of a conversation in a form a human can read.
The Platform Engineer
The documented model is peer chats plus renameable group chat rooms that any user can create, with offline members receiving messages on next login, and history browsed per contact via a View History button alongside a team-wide compliance archive. I found no public information on threading, mentions, reactions, file previews or workspace-wide search with filters, so an eighteen-month-old decision is not reliably findable from what is published. 4 5 6