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slack.com
In short: Getting listed on Slack Marketplace is free. Plan for about 45 minutes — there is material to prepare and a review to wait on.
What they ask for: Build your production-ready Slack app for safe file/text utilities, then submit it from the app configuration page for Marketplace review.
Build your production-ready Slack app for safe file/text utilities, then submit it from the app configuration page for Marketplace review.
Must be fully functional, installable, tested outside the development workspace, secure, and useful inside Slack; review is strict.
Open the submission page on slack.com and complete its form — that is the "Open submit page" link at the top of this page.
Must be fully functional, installable, tested outside the development workspace, secure, and useful inside Slack; review is strict.
Priority sets the band — this one is do first. Cost (free) and effort (moderate) move it within that band, which puts it in the highest impact tier. The score orders a submission queue. It is not a measure of the site’s domain authority, traffic or quality.