Open Source PaaS

free-for-dev is a long-running, community-curated catalog of services that offer free tiers useful to developers, students, makers, and small teams. The list spans hosting, databases, CI/CD, monitoring, source control, APIs, design tools, and more, organized into clear categories so readers can scan and compare options quickly. It emphasizes practical limits such as usage caps, seat counts, rate limits, and time-boxed trials, helping users spot real-world constraints before adopting a tool. The repository is maintained via pull requests and issue discussion, so new services and policy changes can be incorporated as providers evolve their offerings. Contributors often include short notes or caveats next to each entry, which keeps the list actionable rather than just promotional. Because it’s a single, searchable markdown resource, it has become a go-to reference for bootstrappers and engineers looking to prototype or run small workloads at minimal cost.

1Backend is an AI-native full-stack platform for building distributed applications with microservices and microfrontends. It works as a framework, proxy, and runtime that reduces early infrastructure overhead for developers. The platform includes built-in capabilities for authentication, user accounts, service routing, microfrontend routing, email, and API access. It can run and program LLMs inside containers, making it suitable for AI applications as well as general software products. 1Backend is designed around zero-trust and zero-config principles, with an ORM that can support development even before a database is introduced. It is also multitenant, allowing multiple apps or sites to run from a single installation.

Convox Rack is a private PaaS that runs inside a user’s AWS account and provides a managed application deployment layer over cloud infrastructure. It is designed for teams that want the productivity of a platform-as-a-service while keeping workloads, data, and infrastructure under their own control. Developers interact with Rack through the Convox CLI to create apps, set environment variables, deploy code, build releases, and promote updates. The platform handles application lifecycle tasks such as releases, logs, processes, scaling, rack updates, access credentials, and operational configuration. It also exposes commands for inspecting rack processes and generating Kubernetes configuration for the underlying cluster. Convox Rack is especially useful for teams that want repeatable deployments, cloud-native isolation, and reduced infrastructure maintenance without moving everything into a fully managed third-party runtime.

Steedos Platform is an open-source, AI-native infrastructure platform for building enterprise applications through metadata instead of repetitive boilerplate code. It is evolving into ObjectStack, a modular architecture built around ObjectQL, ObjectOS, and Object UI. The platform uses a metadata-driven model similar in spirit to Salesforce, but with a stronger focus on prompt-based app generation and open deployment. ObjectQL defines data, logic, and UI in a standard format that AI tools can generate and modify. ObjectOS provides the runtime layer for APIs, authentication, permissions, workflow automation, and business logic. Object UI turns metadata into responsive React and Tailwind interfaces, while still allowing custom components and pro-code extension. Steedos is built for teams that need enterprise-grade apps with low-code speed, AI assistance, and flexible backend architecture.

ZaneOps is a self-hosted, open-source PaaS for deploying and managing applications, services, databases, workers, and static sites. It is designed as an alternative to platforms like Heroku, Railway, Render, Vercel, and Netlify while keeping ownership of infrastructure in the user’s hands. The platform uses Docker Swarm for scalable container orchestration and Caddy for flexible routing and web serving. It gives developers a polished dashboard for managing projects, deployments, logs, URLs, environment variables, resource limits, and service configuration. ZaneOps supports Docker image deployments and deployment webhooks, making it useful for automated release workflows. It is aimed at startups, self-hosters, and teams that want modern deployment convenience without giving up control over servers, costs, or data.

k8s_PaaS is a hands-on Chinese tutorial project for building a complete PaaS and DevOps platform on top of Kubernetes. It teaches users how to deploy and connect core infrastructure components such as Kubernetes, Dashboard, Harbor, Jenkins, local GitLab, Apollo, Prometheus, Grafana, Spinnaker, Zookeeper, etcd, and related services. The repository is structured as a practical learning path with real deployment code, architecture design notes, operational screenshots, and extensive comments. It explains not only what to do, but also why each step matters and how to complete it in a working environment. The guide is aimed at helping beginners move from Docker basics to a full Kubernetes-based delivery platform. By the end, users are expected to understand automated deployment, CI/CD, monitoring, configuration management, service delivery, and platform maintenance.