Launch guidePlugins and integrations
How to launch a Slack app
Slack apps can be installed from your own site at any time, but the Slack Marketplace listing goes through a two-stage review that Slack says can take weeks: a preliminary check of up to 10 business days, then a functional review of about 10 weeks for new apps. So launch from your own Add to Slack page and treat the Marketplace listing as the follow-up. Slack also wants proof the app is used and supported: 10+ active workspaces, public landing, support and privacy pages, and security basics like OAuth state and request signing.
Updated · platform facts checked against the official docs linked below
At a glance
Where people find Slack apps
- Slack Marketplace: Admins browse by category and search by task.
- Your own install page: An Add to Slack button works before Marketplace approval.
- Communities of the teams you serve: An app for support teams launches in support-team communities.
- Product Hunt and LaunchRanked: A launch spike plus a permanent page.
Assets to prepare
| Asset | Spec or guidance |
|---|---|
| Screenshots | 1600×1000 (8:5), JPG or PNG under 2 MB, showing the app in Slack.[1] |
| Video (optional) | 30–90 seconds, public YouTube link, showing the app in Slack.[1] |
| Landing page | Public, explains the problem, shows the Slack integration, install path, support and privacy links.[1] |
| Support page | Public, clear contact method, no signup needed.[1] |
| Privacy policy | What you collect, how it's used, retention, deletion requests, contact.[1] |
Store and listing rules
What the platform itself says, with a link to the page we checked.
- Slack treats apps with fewer than 10 active workspaces and fewer than 10 weekly active users as not ready for the Marketplace.[1]
- Security requirements include TLS 1.2+, OAuth
state, request verification with signing secrets or mutual TLS, and secure token storage.[1] - Substantial feature changes after approval need resubmission.[1]
- Reviewers test install, OAuth, onboarding, full functionality, uninstall and whether each scope is needed. They can only use test accounts made for review, not your Slack workspaces, so provide credentials with dummy data.[2]
A 4-week launch timeline
Week 1 · four weeks out
- Get the app into 10+ workspaces with real weekly use.
- Implement OAuth state and request signing.
- Write the privacy policy.
Week 2 · three weeks out
- Build the landing and support pages.
- Take 1600×1000 screenshots in a real workspace.
- Record the 30–90 second video.
Week 3 · two weeks out
- Launch publicly from your own Add to Slack page.
- Submit to the Marketplace with test credentials and dummy data.
- Prepare launch posts.
Week 4 · launch week
- Answer preliminary review feedback quickly.
- Set up support so you can reply within 2 business days.
- Plan onboarding messages inside Slack while the functional review runs.
Launch-day checklist
- Share the Marketplace listing and your install page.
- Post in communities of the teams you serve.
- Launch on Product Hunt and LaunchRanked.
- Watch install errors and OAuth failures closely.
After launch: SEO steps
Launch boards reset; search pages don't. These steps keep people finding you after launch week.
- Write "how to {task} in Slack" pages.
- Publish integration pages for each tool the app connects.
- Keep the landing page current with screenshots from Slack's latest UI.
Common mistakes
- Submitting before there's real usage.
- Support behind a login.
- Screenshots that don't show Slack.
Templates for this launch
- Onboarding email sequenceA five-email onboarding sequence for new signups: welcome, first win, common blocker, social proof and a check-in, with timing and a filled example.
- Product one-pagerA one-page product summary for buyers, partners and investors: problem, solution, how it works, proof, pricing and next step, with a filled example.
- Directory listing descriptionWrite directory and launch-site listings once: a 60-character tagline, a 160-character short description and a long version, with a filled example.
FAQ
What does Slack require for a Marketplace listing?
Public landing, support and privacy pages, security basics like OAuth state and request signing, and real usage; apps under 10 active workspaces and 10 weekly active users are treated as not ready.
What size are Slack Marketplace screenshots?
1600×1000 (8:5), JPG or PNG under 2 MB, showing the app working in Slack.
Can I launch before Marketplace approval?
Yes. Teams can install from an Add to Slack button on your site while the listing is in review.
How long does Slack Marketplace review take?
Slack describes a preliminary review of up to 10 business days, then a functional review that takes about 10 weeks for new apps (6 for updates). Launch from your own install page in the meantime.
Sources
Checked . Platforms change their rules; open the source before you rely on a number.
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