Scheduling and meetings decision
Roster for Slack
A competent technical user can build and run a minimal Rosters-for-Slack replacement in about a week and low monthly hosting cost; there are no evident durable moats on the product pages that prevent DIY.
Visit website↗Built by Justin Butlion, who ships 3 products in this index
$8/mo
$96/yr
Read off the official pricing page.
$50one-off30 h to build
$35/mo3 h/mo upkeep
On cash alone, building overtakes the subscription at 5 seats.
Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need - the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship. All Roster for Slack alternatives, with the arithmetic →
What a replacement has to do
- Create and store rosters (date/time + assignee), assign people to shifts, and send scheduled Slack notifications/messages to assignees.
What it still won’t have
- Marketplace listing and distribution handled for you (Slack App Store onboarding and updates)
- Commercial support SLAs (48hr/24hr/priority) and customer support
- Polished multi-tier pricing, billing, and account management flows
- Any monday.com integrations or prebuilt templates referenced on the site
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 5 seats.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a self-hosted Slack roster service using Node.js (Express) + Postgres + a background worker (BullMQ) deployed to a single VPS. Core features: Slack OAuth install and bot user; REST CRUD for rosters (date, time, assignee); scheduled worker that posts reminders to Slack using chat.postMessage; slash command and interactive message handlers for assigning/swapping shifts; a minimal web admin UI to list/manage rosters and users. Out of scope: multi-tenant billing, advanced analytics, monday.com integrations, and enterprise SLA. Include input validation, retries for failed Slack API calls, logging, basic tests for API and scheduling logic, and an automated deploy script (Docker + docker-compose).
How we checked
How the score was reached
- Build verdict base78
- An open-source build was found+5
- 3 cited sources+3
- Price verified on pricing page+3
- Evidence score89
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time - so the same evidence always produces the same number.
How scoring works →Cited sources · 3
Every page the run actually retrieved.
- official productRosters for Slack - Change1t Apps
- official pricingRosters for Slack Pricing
- open sourcelukevella/rallly
Integrity checks
What held up, and what did not.
