Open source Neon alternative

There are roughly 8-12 viable open source PostgreSQL hosting and management tools in this space (including Supabase's open source core, PostgREST, pgAdmin, and purpose-built alternatives), but most operate in different layers—some handle infrastructure, others focus on API generation, and few deliver the complete developer experience Neon provides. The core pain points are fragmentation of setup (you end up stitching 3-4 tools together), lack of managed simplicity, scaling complexity, and absence of good observability dashboards that don't require DevOps expertise. The real gap isn't in the technology itself—PostgreSQL is mature and solid—but in the user experience layer: a shipper wants to spin up a production database in 60 seconds with automatic backups, branching, and cost transparency, without touching YAML or Docker. The actual opportunity sits at the intersection of fully open source infrastructure plus a managed control plane that costs less than Neon's $50-150/month tiers. A new entrant should focus on either (1) becoming the easiest self-hosted alternative with dead-simple one-click deployment, or (2) building a transparent, usage-based pricing model that undercuts Neon on mid-market workloads (1-50GB databases).