This page is designed to help you find out whether RexOne by Rex9 is good and if it is the right choice for you.
RexOne is a 100% free and open-source (Apache 2.0) sovereign full-stack foundation for web and mobile. Instead of spending 9 months and $150k+ rebuilding the same universal plumbing—authentication, 23-resource RBAC, Stripe billing, media pipelines, background queues, and mobile clients—RexOne provides an enterprise-grade, battle-tested baseline on day one.
Listed in
Sovereign Tri-Platform
Rails 8 API + React 19 SPA + native 60fps Flutter 3 Mobile with Drift SQLite offline sync.
Discipline-Driven Development (DDD)
Enforces an immutable constitution (LAW.md) and 1,785+ tests so AI coding agents build within deterministic guardrails.
Zero Redis & Self-Hosted S3
Runs under 2GB RAM on a $5/mo VPS using Solid Queue, Solid Cable, and European Garage S3 with zero cloud rents.
Ruby on Rails 8.1, PostgreSQL 18, React 19, Vite, TypeScript, Flutter 3, Dart, Drift SQLite, Solid Queue, Solid Cable, Docker, and Garage S3.
Independent software engineers, indie hackers, European startups, and development teams building modern web and mobile apps who want to avoid Big Tech cloud rents and unconstrained AI architectural debt.
Created by systems architect Rex (Htet Naing) after a decade of building high-throughput systems. Frustrated by teams burning 9 months rebuilding the exact same auth, billing, queues, and storage for every product, Rex forged RexOne under the creed: Start from One. Not from Zero.
Unlike closed commercial boilerplates charging $200–$800 with web-only limitations, RexOne provides full mobile coverage (compiled 60fps Flutter 3), native offline SQLite sync, zero egress bills with Garage S3, and complete Apache 2.0 open-source sovereignty.
RexOne is a 100% free, sovereign tri-platform foundation spanning Rails 8, React 19, and Flutter 3. Instead of scattered boilerplates or expensive BaaS lock-in (Firebase/Supabase), RexOne combines self-hosted Garage S3, zero-Redis Solid Queue, and an offline-first mobile sync engine governed by Discipline-Driven Development (DDD) and LAW.md.
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