Is this a 1:1 Slack clone?

Channels, DMs, files, and apps, yes. Marketplace bots you will rebuild. Most teams migrate the rooms they actually use and leave old Slack links until they rot.

Stacks / Support

Easy

Rocket.Chat

Self-host team chat, huddles, and apps without Slack's per-seat meter.

The problem

Slack Pro is a seat tax on every human who so much as posts. History, huddles, and apps live in a vendor you cannot air-gap. Rocket.Chat is the open-source workspace chat already in the catalog.

Replaces

Slack

Replace Slack

Estimated SaaS saved

$2,100

per year, small team, before lock-in

Deploy on Railway

Sponsor this stack

Placeholder: Rocket.Chat + MongoDB (or the project's bundled DB) as a Railway service with a volume. Point WEBHOOK/ROOT_URL at the public domain.

The stack

Rocket.Chat
Open-source team chat, voice, and apps
Catalog entry →

Cost table

You stop paying	Typical / year	Self-host instead
Slack Pro (10 seats)	$2,100	Rocket.Chat on Railway

Agent setup prompt

Replace Slack with self-hosted Rocket.Chat.

- Persist Mongo/uploads on a volume. Bind HTTP to 0.0.0.0:$PORT.
- Set ROOT_URL to the Railway public domain. Turn off public registration after the first admin.
- Document how to import Slack export (or rebuild the 5 channels that matter).
- Write AGENT_PROMPT.md and a cost table vs Slack Pro seats.

Also as markdown: /stacks/rocket-chat.md

FAQ

Is this a 1:1 Slack clone?: Channels, DMs, files, and apps, yes. Marketplace bots you will rebuild. Most teams migrate the rooms they actually use and leave old Slack links until they rot.