Best Open Source Alternatives to Mendix

Compare the best free and open-source alternatives to Mendix — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 4 alternatives

Mendix

Proprietary SaaS

PricingFreemium

Platformsweb, desktop, windows, mobile, ios, android

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Mendix alternatives compared

Open-source alternatives to Mendix, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
ToolJet	41,179	AGPL-3.0	WebDockerLinuxmacOS	Yes	Nov 2026	Visit
Appsmith	41,153	Apache-2.0	WebDockerLinuxmacOS	Yes	Nov 2026	Visit
Budibase	28,376	GPL-3.0	WebDockerLinuxmacOS	Yes	Nov 2026	Visit
Lowdefy	3,018	Apache-2.0	WebDockerLinuxmacOS	Yes	Nov 2026	Visit

Top open-source Mendix alternatives

ToolJet41,179AGPL-3.0

ToolJet is an open-source Retool alternative for building internal tools and dashboards, connecting to databases and APIs with self-hosted data privacy.

WebDockerLinuxmacOSWindows

vs Mendix: a free, open-source option you fully control, licensed AGPL-3.0.

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Appsmith41,153Apache-2.0

Self-hosted open-source internal tool builder that turns databases and APIs into reactive admin panels, replacing Retool without per-seat cloud costs.

WebDockerLinuxmacOSWindows

vs Mendix: a free, open-source option you fully control, licensed Apache-2.0.

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Budibase28,376GPL-3.0

An open-source low-code platform to build internal tools and workflows. Self-host fast CRUD apps, automations, and AI agents on your data.

WebDockerLinuxmacOSWindows

vs Mendix: a free, open-source option you fully control, licensed GPL-3.0.

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Lowdefy3,018Apache-2.0

Lowdefy is an open-source alternative to Retool that lets developers build internal tools and database dashboards using declarative YAML configuration.

WebDockerLinuxmacOSWindows

vs Mendix: a free, open-source option you fully control, licensed Apache-2.0.

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Best Open Source Alternatives to Mendix

Mendix

Mendix alternatives compared

Top open-source Mendix alternatives

The modern standard for Protobuf workflows

Mentoring for backend developers. Consulting for startups.