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Appsmith

Free tier

Open-source low-code platform to build custom internal apps 80% faster

Free tier available·All audiences·API available·Open source

Key strengths

Fully open-source under Apache 2.0 with 40K+ GitHub starsDrag-and-drop UI builder with full JS/HTML/CSS customizationConnects to any database, REST/GraphQL API, or SaaS toolGit-based version control with CI/CD and multi-environment supportEnterprise-grade security: SSO, RBAC, SCIM, SOC 2 Type II, air-gapped deployment
Free tier + paid plans
US
Self-hostable
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Appsmith is a developer-first low-code framework that provides a centralized IDE with auto-complete, multi-line editing, debugging, and linting for managing variables, functions, and business logic. It connects natively to databases, REST/GraphQL APIs, and SaaS tools, and supports self-hosting with air-gapped deployment for secure access to internal data. Developers can write reusable JS code blocks, import external JS libraries, and create custom widgets in JS/HTML/CSS. Git integration supports branch-based dev/staging/prod environments, pull request workflows, and automated CI/CD deployments. Enterprise features include SAML/OIDC SSO, RBAC, SCIM-based user provisioning, audit logging, and SOC 2 Type II compliance.