We built a permissions layer for Notion

My agency was bleeding $1,800/year on contractor Notion seats. The problem: I needed to give contractors access to specific data (CRM, project tracker) but couldn't let them see pricing, margins, or other clients' information.Notion's native solution doesn't work:Row-level filtering exists but it's view-only (contractors can't edit)Column hiding doesn't existGuest sharing is read-onlySo you either pay $15/mo per seat or duplicate databases (maintenance nightmare)I built a permissions layer using Notion's OAuth API. It lets contractors see only specific rows and columns, edit data, all without expensive seats.How it works:Connect Notion via OAuthDefine roles: "Sales reps see only leads where owner = them, hide pricing column"Contractors access a clean portalThey view/edit data in real-time (syncs every 5 minutes)You pay $59/mo flat for unlimited usersThe math:5 contractors × $15/mo = $900/year wasted20 contractors × $15/mo = $3,600/year wasted50 contractors × $15/mo = $9,000/year wastedWith this: all of them = $59/mo flat.Technical:Frontend: React + TypeScriptBackend: Supabase + PostgreSQL (RLS)Auth: Notion OAuth 2.0Current state: 50 beta testers. First 20 customers get $49/month locked-in (launching at $79 after January).Limitations:Only Notion databases (not pages)5-minute sync (not instant)Requires role definitionNo team permissions yet (roadmap)The ask: If this solves a problem you have, we'd love feedback. Are there permission use cases we're missing? What's your price sensitivity?Free trial: notionportals.com