ToolJet vs Windmill: Which Is Better in 2026?

ToolJet is an open-source, low-code framework for building and deploying internal tools, dashboards and business applications, with broad support for connecting to the data sources and services teams already use. Like other tools in this space, it tackles the common pain of needing custom internal software — admin panels, operational dashboards, support tools — without spending excessive engineering time building them from scratch, by providing a visual builder and rich connectivity that let teams ship internal apps fast.

ToolJet's strength is its flexibility and breadth of integrations. It connects to a wide range of databases (Postgres, MySQL, MongoDB and more), APIs, and popular SaaS tools, so you can build tools on top of whatever data and services your business relies on. You assemble interfaces visually from a library of components, add queries and logic to connect them to your data, and can incorporate custom code where needed for more advanced behavior. This combination of visual speed and developer flexibility makes it suitable for everything from simple CRUD apps to more sophisticated internal tools.

As an open-source platform, ToolJet can be self-hosted for control over data, security and cost, with a cloud option available too, and it benefits from community contributions and transparency. It's used by engineering and operations teams that need to build internal software efficiently and want an ownable, flexible alternative to proprietary platforms. As organizations increasingly require custom internal tools and seek to build them quickly without large development investments, open-source low-code frameworks have become a go-to solution. For developers and teams that want to build and deploy internal tools rapidly, with extensive data connectivity and the freedom of open source, ToolJet offers a capable, well-rounded and widely-adopted platform.

Windmill is an open-source developer platform that turns scripts into production-grade workflows, scheduled jobs, APIs and internal tools — combining the flexibility of code with the convenience of a low-code platform. It's aimed at developers and technical teams who want to automate processes and build internal applications without the limitations of pure no-code tools or the overhead of building everything from scratch. You write logic in real languages (Python, TypeScript, Go, Bash, SQL and more), and Windmill handles turning that into scalable, reliable automation.

The platform's versatility is its strength. From individual scripts, Windmill lets you build multi-step workflows with a visual flow editor, schedule jobs with cron, expose logic as APIs and webhooks, and create internal app UIs and admin tools on top of your code. This means a single platform can replace a patchwork of automation tools, internal tooling frameworks and job schedulers, all while keeping your business logic in maintainable, version-controllable code rather than locked inside a proprietary visual builder. It handles execution, dependencies, secrets, permissions and observability so you don't have to.

Being open source, Windmill can be self-hosted for full control, privacy and cost efficiency — appealing strongly to teams that want to own their automation infrastructure — with a cloud option available too. It's designed for performance and scale, and supports collaboration so teams can build and share scripts, flows and apps. This makes it a powerful fit for engineering, data and operations teams that need to automate workflows, run scheduled jobs, and build internal tools quickly while retaining the power and maintainability of code. For developers who find no-code automation too limiting but don't want to build and operate their own automation stack from zero, Windmill offers a flexible, open and genuinely powerful platform that bridges the gap.