Rocket.Chat vs Slack
Side-by-side trajectory, velocity, and editorial themes.
Rocket.Chat is stabilizing 8.5.0 — the feature payload landed in rc.0; the recent RCs are bump-and-harden.
Rocket.Chat is in the release-candidate stretch for 8.5.0. The substantive changes — attribute-based access control (ABAC) admin tabs, phishing-resistant server-side OAuth with PKCE and stronger 2FA, an experimental SDK-over-DDP transport, and a per-room search index option — landed in rc.0. Every RC since (rc.1 through rc.6) is a dependency version bump, with one small fix letting bot agents skip the chat-limit lock.
The direction this cycle is security and access control: ABAC moving deeper into administration, OAuth hardened against token theft and phishing, and OAuth tokens cleaned up on deactivation. The steady stream of bump-only RCs signals a release converging on stability rather than adding scope before 8.5.0 final.
Expect 8.5.0 to reach final release once the RC cadence settles, with ABAC and the server-side OAuth flow as its headline changes; the SDK-over-DDP transport stays opt-in until it's proven.
Slack's developer platform is reorganizing around agents, MCP, and streaming Block Kit surfaces.
Slack's platform work over the past quarter centers on agent development and richer app surfaces. The CLI 4.x line ships agent scaffolding, the Slack MCP server keeps gaining tools, and Block Kit has added streaming APIs plus new block types (cards, carousels, data tables). Security plumbing like PKCE and optional OAuth scopes rounds out a platform being hardened for third-party AI apps.
The direction is to make Slack the surface where AI agents are built, deployed, and rendered. Streaming APIs and new Block Kit blocks exist to host conversational and agent UIs natively, while the MCP server turns Slack into an addressable tool for external agents. Expect continued cadence on both the developer tooling and the runtime surface.
Next likely moves are more MCP server tools and additional streaming-oriented Block Kit components as the agent-app surface matures.
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