Open Saas Directory
Appsmith

Appsmith

★ 40,8264,757 forks4,757 contributorsUpdated 9/7/2026

An open-source low-code platform and a self-hostable alternative to Retool for building internal tools, admin panels, and dashboards. Appsmith connects to 25+ databases and any REST or GraphQL API, pairs a drag-and-drop UI builder with pre-built widgets, and lets developers add logic in JavaScript — with no per-user cost when self-hosted.

GitHubOfficial WebsiteDocumentationGitHub Repository

Overview

Description

Appsmith is an open-source low-code platform and a self-hostable alternative to Retool for building internal tools, admin panels, and dashboards. It connects to relational and NoSQL databases plus any REST or GraphQL API, provides a drag-and-drop canvas with a large widget library, and lets developers drop into JavaScript for logic and data transformation. The Community Edition is Apache-2.0 licensed and free to self-host with no user limits.

Features

  • Visual UI builder: Drag-and-drop widgets — tables, forms, charts, maps — bound to queries and JS.
  • Data connectors: PostgreSQL, MySQL, MongoDB, REST, GraphQL, Google Sheets, S3, and 40+ more.
  • JavaScript everywhere: Write JS in any input field, plus reusable JS Objects for shared logic.
  • Git sync: Version-control apps and collaborate through your own Git repository.
  • Access control: Granular RBAC, SSO, and audit logs (SSO/RBAC in the paid tier).
  • Self-hosted or cloud: Docker, Kubernetes (Helm), or AWS/DigitalOcean images.

Technology Stack

  • Java (Spring Boot) backend
  • React / TypeScript front end
  • MongoDB for application metadata, Redis for caching
  • Docker / Kubernetes for deployment

Requirements

  • Docker and Docker Compose, or a Kubernetes cluster
  • Around 2 GB RAM minimum for a single-container install
  • A reverse proxy with TLS for production

Learning resources

Video

Appsmith Tutorial For Beginners 2025 | How To Use Appsmith

A beginner walkthrough of building an internal tool in Appsmith: connecting a data source, laying out widgets, and wiring queries with JavaScript.

By · Invalid Date

Article

Install Appsmith with Docker

The official guide to self-hosting Appsmith with Docker: pulling the image, configuring environment variables, persisting data, and upgrading.

By Appsmith · Invalid Date

Related Projects

Other open-source tools people explore alongside this one.

ToolJet

ToolJet

41,1045,504

Low-code platform for building internal tools and business apps

10/17/20265504 contributors
Budibase

Budibase

28,2702,207

Budibase is an open-source low-code platform for internal tools, and a self-hosted alternative to Retool. You connect an existing SQL database, REST API, or spreadsheet — or use its built-in database — then assemble screens, forms, and automations from prebuilt components. Apps are deployed from the same tool, either to Budibase's own runtime or via Docker and Kubernetes.

9/10/20262207 contributors
Windmill

Windmill

17,9191,096

Windmill is an open-source developer platform and workflow engine, and a self-hosted alternative to Retool, Airflow, and Temporal. Scripts written in Python, TypeScript, Go, Bash, or SQL become instant webhooks, scheduled jobs, multi-step flows, or auto-generated UIs. A Rust-based execution engine runs steps across distributed workers for high-throughput job processing.

9/13/20261096 contributors