Open Source Alternatives to OutSystems

A low-code AI development platform that enables enterprises to build, orchestrate, and govern custom AI applications and agentic systems without extensive coding.

Whether you want to cut software costs or escape vendor lock-in, these open source alternatives to OutSystems give you an option you fully own. You can self-host them, so your data stays on infrastructure you control. This page lists 3 open source alternatives to OutSystems. The most popular are AppSmith, Corteza and REI3. Most use the Apache-2.0 or MIT license, and 3 offer an official Docker image.