16 Open Source Alternatives to Retool

Appsmith connects to diverse data sources and offers a drag-and-drop UI builder combined with full JavaScript customization. Developers can create responsive applications with integrated Git workflows and CI/CD support, ensuring secure and scalable deployments. The platform is designed for speed and ease, reducing development hours and costs while allowing complete control over application logic and appearance.

ToolJet enables you to craft sophisticated business apps from scratch without extensive coding. It connects effortlessly to various data sources including GraphQL, Airtable, and Google Sheets, while also integrating leading LLMs like OpenAI. The platform offers AI-guided support, automated schema generation, and robust security features, ensuring your applications are scalable and production-ready.

Appwrite streamlines backend development by offering a comprehensive suite of services including 30+ authentication methods, robust databases with advanced permissions, serverless functions supporting 30+ runtimes, versatile messaging, secure file storage with encryption, and realtime event handling. Whether you choose self-hosting or cloud deployment, Appwrite provides the tools and flexibility needed to build and scale your application efficiently.

NocoDB provides an intuitive spreadsheet interface for creating and managing online databases from scratch or by connecting to Postgres/MySQL. It offers versatile views including grid, kanban, gallery, form, and calendar, along with powerful API and SQL access. The platform supports seamless data integration, schema management, and robust collaboration, making it ideal for use cases from CRM and project management to inventory tracking.

Budibase provides a versatile platform to design management apps, portals, forms, approval flows, and admin panels using a drag-and-drop interface and pre-built components. Connect to external databases, REST APIs, or use its built-in database while leveraging containerized deployment options such as Docker and Kubernetes for scalable, enterprise-grade security.

Abstra simplifies process automation by converting intricate business workflows into efficient, optimized solutions. It offers a drag-and-drop interface integrated with VS Code, native PostgreSQL table management, and seamless Git connectivity. With secure SSO, auditable logging, and flexible deployment options including cloud and on-premise hosting, Abstra ensures compliance and scalability for businesses of any size. Its extensive connector library and customizable widgets further enhance integration and user experience.

Windmill turns scripts in languages such as Python, TypeScript, Go, and more into auto-generated user interfaces, APIs, and scheduled tasks. It allows you to compose workflows, data pipelines, and internal tools effortlessly with a low-code app editor and extensive integrations. The platform is designed for performance and scalability, letting you deploy on your own infrastructure or in the cloud with advanced logging, error handling, and permission management.

Evidence empowers users to build sophisticated data apps with a code-driven workflow that combines SQL, markdown, and custom visualization components. It pre-builds queries and pages for instant performance and offers templated pages to dynamically generate thousands of data-driven reports. With seamless integration into existing data stacks and version control support via Git, Evidence is tailored for rapid iteration and collaboration.

Refine offers a comprehensive set of hooks and components that enable developers to quickly build robust web applications. It integrates seamlessly with various UI frameworks like Material UI, Ant Design, and Chakra UI, while supporting multiple backends and authentication providers. Its open-source architecture ensures full control over your project with scalable and secure infrastructure, reducing development time and complexity.

Rowy lets you view and manage your data with an intuitive spreadsheet UI powered by your existing cloud database while writing custom backend logic directly on the screen. With over 30 field types, support for any npm package or API, and built-in automations like derivative and action fields, Rowy enables you to build APIs, scheduled jobs, and backend workflows swiftly. It integrates granular access controls and field validations to ensure data integrity and team collaboration.

NocoBase offers a data model-driven approach that separates the user interface from the underlying data structure, allowing both non-developers and technical teams to build complex business systems swiftly. Its plugin-based architecture supports limitless customization, seamless integration with third-party systems, and robust logging and monitoring, ensuring flexibility and control in every deployment.

undb empowers users to create custom applications quickly using a self-hosted no-code platform. With multiple view options such as grid, kanban, calendar, gallery, pivot, and form views, it adapts to various data management needs. Built on modern stacks like Bun, Svelte, Tailwind CSS, and SQLite, undb also offers ready-to-use templates for project management, to-do lists, sales CRMs, and more.

Dropbase enables developers to build and launch web apps quickly by declaring applications in natural language, adjusting UI components with a visual drag-and-drop interface, and automatically generating, previewing, and editing code. The platform integrates with popular tools and services, providing admin panels, approval dashboards, data editors, cloud consoles, and notification systems to support extensive backend operations.

OpenBlocks enables developers to build internal tools rapidly by connecting to any data source or API and designing interfaces with over 50 built-in components. The platform features a module and query library for reusability, supports custom components via React and an SDK, and provides native connections to multiple databases and services. Its robust system includes role-based access control, audit logs, and theme customization options, all aimed at streamlining app development.

ILLA Cloud empowers users to design and deploy internal tools as easily as assembling blocks. With a drag-and-drop UI builder and native integrations with PostgreSQL, MySQL, Supabase, GraphQL, MongoDB, MSSQL, REST APIs, and more, the platform streamlines building responsive apps. It also supports AI Agent integration for intelligent analysis and utilizes ILLA Flow to automate workflows, making it a robust solution for rapid app development.

Lowdefy empowers developers to build dynamic web apps and internal tools with minimal coding. By leveraging a rich set of over 70 blocks, 150+ logic operators, and extensive React components, the tool simplifies UI creation and data integration. Its flexible, self-hosted framework runs as a Next.js app and supports secure connections, role-based access control, and plugin extensions.