What Slack does
Slack is a connected team-messaging service for channels, direct messages, threads, files, search, huddles, canvases, workflows, and integrations. The desktop application is a client for a Slack workspace: sign-in, message history, search, file access, calls, integrations, and synchronization require Slack's service and network access. Cached interface state is not an offline collaboration system.
Feature availability depends on workspace plan, administrator policy, role, region, retention settings, and current product packaging. Searchable history can be limited or deleted by plan and retention policy. Huddles, recordings or transcripts, Canvas, Workflow Builder, guest access, and integration counts must not be assumed from installation alone. Third-party apps have separate publishers, OAuth scopes, data retention, terms, and possible charges.
Slack versions and package channels differ by platform. On 2026-08-30 Slack's official Windows x64 endpoint resolved to per-user setup 4.51.191. The macOS DMG and Linux DEB/RPM rows remain pinned at 4.49.89 and should be compared with Slack's current platform downloads before use. Slack’s current Windows deployment documentation offers MSIX for administrators. The per-user EXE listed here is a different package; MSIX registration, provisioning, data locations and update controls require their own deployment plan. This audit did not sign in, install, inspect code signatures, or test auto-update and proxy behavior.