ToolJet
93 · HealthyLow-code platform for internal tools and workflows with many data-source connectors.
Open source alternatives to OutSystems
3 open source projects replace OutSystems, ranked by how safe each is to depend on.
Appsmith
91 · HealthyLow-code builder for admin panels, dashboards and internal CRUD apps.
Refine
81 · HealthyReact framework for building admin panels, dashboards and internal tools on top of any backend.
Source-available and unverified licenses
The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.
NocoBase
99 · HealthyPlugin-based no-code platform for building internal business systems on your own data model, with AI assistants.
At a glance
Health and license are separate verdicts: a project can be well maintained and still not be open source.
| Project | Health | License | Stars |
|---|---|---|---|
| ToolJet | 93 · Healthy | Free, share hosted changesAGPL-3.0Relicensed 2021 | 41k |
| Appsmith | 91 · Healthy | Free to useApache-2.0 | 41k |
| Refine | 81 · Healthy | Free to useMIT | 36k |
| NocoBase | 99 · Healthy | Free, no resellingApache-2.0 + extra terms | 25k |
More in Internal tools & automation
OutSystems is a paid internal tools & automation product. See all open source internal tools & automation tools, ranked the same way.
Scores last refreshed from GitHub on 9 October 2026. How we score.