Cosmo for Slack Communities: Commerce and Membership Sales Inside Slack

Community builders who run their audiences inside Slack have no native way to sell memberships, digital products, or access tiers. Today they stitch together a separate checkout tool (Gumroad, Stripe payment links), a membership gate somewhere else, and then manually invite or remove people from Slack channels when payments succeed or lapse. This means leaks: churned members keep access, new buyers wait for manual onboarding, and there is no clean way to sell tiered access to specific channels. Cosmo for Slack Communities closes that gap by putting commerce and membership management directly inside the Slack workspace. The core solution: connect Stripe, define access tiers mapped to channels or private groups, and let members buy in without leaving Slack. When a payment clears, the member is auto-invited to the paid channels; when a subscription lapses, access is revoked automatically. The MVP is deliberately narrow: a Slack app that handles subscription memberships with Stripe, gated channel access, and a checkout link that can be dropped into any channel or DM. Revenue comes from a percentage take on transactions plus a monthly SaaS fee per workspace, which is the same model the direct competitor Cosmo already runs on. Go to market starts with indie educators and paid community operators who already sell knowledge but hate their patchwork stack. Growth loops emerge because every checkout link and every paid channel invite carries the product's presence in front of new potential community owners, and successful operators recommend the tool to peers in the same creator circles.