SoStack vs Polymemo

SoStack is a communication and coordination platform built for real-world groups. Create private group chats, plan together with shared calendars, and follow verified public groups to stay up to date on what’s happening near you. What you can do with SoStack Private group messaging: Create 1:1 and group chats for friends, teams, families, and communities. Shared calendars + events: Create events in group calendars, add events to your own calendar view, and keep plans in one place. RSVP and planning: Mark events as interested/going and coordinate details with your group. Discover and follow public groups (SoStack Plus): Find local businesses, organizations, and communities, follow them, and see upcoming events and updates. Invite by phone: Invite people to private groups via SMS links, and optionally match contacts to existing SoStack users (with permission). Location-based discovery (optional): Use a city or current location to filter nearby results. Built with safety and control Account deletion in-app: Delete your account from Settings. Privacy-first by design: Messages are protected by access controls, and you control permissions like contacts and location in your device settings.

Polymemo is a multilingual SNS for exchanging ideas and value across language barriers. [ Auto-translate to 244 languages ] Write in any language; readers worldwide read in their own. Powered by Google Translation API with caching for instant repeat access. [ Point-based value exchange ] - Post: 25 points - View: 1-300 points (set by creator) - Negative pricing (premium): -1 to -300 to give points to readers [ Fair rewards for creators ] Points flow from readers to creators. No ad dependency. [ AI x Knowledge ] - Anthropic Claude AI chat - RAG search across organizational Wiki and memos - MCP integration [ Hierarchical communities ] Hashtags auto-generate groups and channels (Slack/Discord-style). [ Organization plans ] Team / Business / Enterprise: org wallet, roles, Wiki + RAG, analytics, guest invites. [ Trusted community ] Phone + Passkey, optional World ID for one-person-one-account, strict RLS. [ Global payments ] PayPal in 200+ countries. [ Key features ] - 8 feed types (recommended, following, group, regional, global, my, bookmarks, history) - Memo posting (plain text, Markdown, form) - PDF attachments with translation - DM / group DM / image attachments - Stamps and reactions - Push notifications - Global map - Wiki - Dark mode A platform where value is fairly recognized. --- Privacy Policy: https://polymemo.com/privacy Terms: https://polymemo.com/terms Contact: support@polymemo.com