Open source Mendix alternatives
Every project in the catalog is MIT, Apache or BSD licensed. 0 projects explicitly describe themselves as a Mendix alternative; 19 more are in the category where Mendix is a typical product.
Open source projects in the same category: Low-Code & App Builders
Category-level information: these projects are the same kind of software as Mendix; they have not claimed to be a one-to-one replacement.
Appsmith
95appsmithorg · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You can develop custom applications such as panels and management panels.
- You can run teams' business processes by creating BT automation and service management tools.
- By integrating AI models with special data, you can configure automations.
- • High number of open issues (4,524)
- ↑ PositiveHacker News
Show HN: No-code alternative to Retool, Appsmith, Internal, etc.
“Those are all different, so it's hard to explain in one sentence. Broadly speaking, Bubble is not that great for internal tools as you have to use add-ons for UI components and integrations. Appsheet is not suited well for complex multi-page workflows and is limited in…”
- • NeutralHacker News
Show HN: No-code alternative to Retool, Appsmith, Internal, etc.
“Since you mentioned about git, I wanted to point out that Appsmith supports git sync. You can follow a standard git workflow. I'm a co-founder of the project, so forgive my shameless plug.”
Verified against README · Oct 26, 2026 · source
Refine
92refinedev · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You can create custom designs with any UI library, such as TailwindCSS, Ant Design, Material UI, Mantine or Chakra UI.
- You can develop applications on different platforms such as Next.js, Remix, React Native and Electron without the need for additional installation steps.
- You can manage authentication, access control, routing, and data extraction processes through standard components and hooks.
- • NeutralHacker News
Show HN: Refine – A Local Alternative to Grammarly
“Well, I understand the security benefits of sandboxing. However, Apple's sandbox restrictions prevent apps from using Accessibility APIs, which are essential for Refine to read and enhance text across different applications. Many popular apps, like Grammarly and Raycast, are…”
- ↓ NegativeHacker News
Launch HN: Refine (YC S23) – Open-source platform for enterprise web apps
“Here are some questions, suggestions, and thoughts roughly categorized as I went through and understood a bit more about refine (the open source) and what I can glean from enterprise. Landing Page / Initial impressions * You mention "enterprise" a lot on the landing page, along…”
Verified against README · Oct 26, 2026 · source
sim
100simstudioai · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You design customized AI agents using visual interface or code.
- You connect 270 excess integrations to workflows, including Slack, Notion, HubSpot, Salesforce, and databases.
- You monitor agents' working history, logs, and scheduled tasks through the system.
Verified against README · Oct 26, 2026 · source
onlook
100onlook-dev · Low-Code & App Builders
Alternative to (project's own claim): Bolt.new, Lovable, V0, Replit Agent, Figma
Common commercial products in this category: Bubble, OutSystems, Mendix
- Using text or visual, you create a new Next.js application in seconds.
- Using the Figma-like interface, you edit your application visually to the browser DOM.
- With the real-time code editor, you manage code and design simultaneously.
- • NeutralHacker News
Show HN: Onlook – Open-source, visual-first Cursor for designers
“Insane work. For sure the middle ground between Figma and Cursor thats been missing. Happy to be powering Fast Applies in Onlook!”
Verified against README · Oct 26, 2026 · source
amis
69baidu · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You create a variety of background pages by writing JSON configurations.
- You define the forms, tables, and CRUD screens with JSON without typing front-face code.
- Using TypeScript, you present new common renderers and contributions.
- • High number of open issues (1,714)
Verified against README · Oct 25, 2026 · source
n8n-io · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- Using n8n and local language models, you can create AI representatives who schedule appointments.
- You can summarize on-premises PDF documents without a data leak.
- You can develop smart Slack bots that manage communication and operational processes.
- • No published release
illacloud · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You design the user interface by dragging the components into the canvas.
- You connect to databases and through the REST API graphical interface.
- With real-time collaboration, you build applications together.
xgo
80goplus · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You write hybrid programs by mixing Go and XGo codes in the same package.
- You integrate C, C++, Python, JavaScript and Go libraries into a single software ecosystem.
- You develop applications with command style syntax and simplified program structure.
- • NeutralHacker News
The XGO Programming Language
“> XGo is a programming language that reads like plain English This is possibly the most dangerous sentence on this entire page. The hubris and ignorance of history wrapped up in this one sentence is breathtaking. We've been trying to do "plain English" programming for 50-odd…”
iflytek · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You can organize AI workflows and provide model management.
- With intelligent RPA integration, you can automate corporate processes.
- You can integrate iFLYTEK Open Platform tools into projects.
Webiny
100webiny · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- On AWS, you install a scalable headless CMS hosted in your own infrastructure.
- Using the TypeScript-based framework structure, you develop custom content models and React components.
- Thanks to multiple tenant support, you provide isolated content management for different user groups and sites through a single installation.
- ↑ PositiveHacker News
Launch HN: Webiny (YC W21) – Open-source serverless framework with a drop-in CMS
“Webiny is definitely not for everyone; it does have specific technologies engraved in the offering, like nodejs, React and GraphQL. That, however, doesn't mean you can't build a REST API with it. Webiny is first of all a development framework, to help you develop apps for…”
- • NeutralHacker News
Launch HN: Webiny (YC W21) – Open-source serverless framework with a drop-in CMS
“Thanks for sharing this feedback. We got similar feedback from a few smaller businesses this week. We're looking into introducing a package between the free open-source and the enterprise. Would you mind sharing what would be your price range where you would find Webiny…”
iflytek · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- With visual designer and drag-and-drop methods, you quickly set up workflows.
- You provide automation between Windows desktop software, web pages, office applications, and ERP systems.
- By installing servers with Docker, you manage task scheduling, terminal monitoring, and team collaboration modules.
dgiot · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You can collect device data with systems that support Modbus, OPC UA and MQTT protocols.
- You can store and manage time series data using TDengine and Parse databases.
- You can monitor status transitions with gen_statem-based device shading and rule engine.
prest · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You generate instant REST API without writing backend code for your existing SQL database.
- You define reading-oriented MCP endpoint to PostgreSQL or MySQL databases.
- You manage multiple databases at the same time with Registry mode or environment variables.
- • Website is unreachable (checked: 2026-10-31)
- ↑ PositiveHacker News
pREST – A fully RESTful API from any existing PostgreSQL database writting in Go
“Today pREST not accept MySQL, more pREST developer working adapter environment, check in I recommend you open issue on pREST and recommend MySQL support”
- ↑ PositiveHacker News
pREST – A fully RESTful API from any existing PostgreSQL database writting in Go
“pREST is not vulnerable to SQL injection, recommend you run tests Check access level (permissions) in”
1024-lab · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You develop web applications with Java and Vue3 based architecture.
- You manage database operations with native and mainstream database integrations.
- You configure security and encryption settings to meet third-level equal protection requirements.
Verified against README · Oct 25, 2026 · source
Flyde
25flyde · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- Using a visual interface in existing TypeScript projects, you can create AI workflows and demand chains.
- Thanks to the VS Code plugin, you can visually design the backend logic and perform debugging.
- Together with technical and non-technical team members, you can collaborate by visualizing complex backend processes.
- • Last update over 1 year ago
- • No published release
- ↓ NegativeHacker News
Show HN: Flyde – an open-source visual programming language
“I have a use case that I tried to build something for. I am about ten iterations in, and the one I still use is an excel file, alas. I am al domain expert and not a programmer, and I just can't wrap my head around how to build it. My MVPs are below minimum, and what I want is…”
- ↑ PositiveHacker News
Show HN: Flyde – an open-source visual programming language
“Hey, author of here! (I was wondering where the spike in visits came from ^^'... Thanks a lot for mentioning me!). Luna Park was indeed a npm package that you could integrate to allow users to build their own logic using visual scripting. In the end, I pivoted, and Luna Park is…”
go-dev-frame · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- SQL, Protobuf veya JSON dosyalarından modüler Go backend kodu üretirsin.
- CRUD, yönlendirme ve API dokümantasyonu içeren servisleri tek adımda oluşturabilirsin.
- RESTful API, gRPC veya HTTP+gRPC servislerini aynı araç zinciriyle kurarsın.
- • NeutralHacker News
Berlin Is Becoming a Sponge City [video]
“Civil engineering has pretty well quantified the rate at which water is absorbed by certain soils, accounting for groundcover, trees, pavement, local detainment, etc. Berlin's sponge mission is baiscially distributed detainment, working to offset hardscaping (driveways and…”
- • NeutralHacker News
Making a Menger sponge in stained glass
“Totally feasible! You could probably put a whole one-person workspace into about fifty square feet without getting cramped, less with some squeezing and multitasking, and I'd guess basic toolset would run you less than $500 retail. The grinder I used is a pretty simple unit with…”
Verified against README · Oct 28, 2026 · source
Corteza
95cortezaproject · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- Develop structured data applications and CRM solutions
- You design smart workflows to automate business processes
- You integrate different data sources with the API-based structure of the platform
Saltcorn
85saltcorn · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- You develop web and mobile database applications using flexible views and data types
- You run a self-hosted or multi-tenant instance on your own server or with the help of Docker
- You manage the installation and database scheme of the application via command line tools and npm packages
- • High number of open issues (747)
- ↓ NegativeGitHub Issue
Mobile App Error on "Location display and search" Pack
“**Describe the bug** When utilizing the Mobile App builder on the "Location display and search" Pack, an error occurs that states "Cannot read properties of undefined (reading 'substr')". This error appears whenever any form of filtering or the Geosearch feature is attempted to…”
- ↓ NegativeGitHub Issue
mobile production: multiple errors, even on saltcorn.com (beta 3)
“**Describe the bug** Tried the new `admin/build-mobile-app` but it raised some errors: First attempt: ``` Build Result Unable to build the app: , added 491 packages, and audited 492 packages in 29s 51 packages are looking for funding run `npm fund` for details 5 moderate…”
Puck
84measuredco · Low-Code & App Builders
Common commercial products in this category: Bubble, OutSystems, Mendix
- Using your own React components, you add custom drag-and-drop editing interfaces to your applications.
- Using ready configuration templates, you quickly start projects based on Next.js or React Router.
- By saving the page data you create to your own database, you manage content management through a visual interface.
- ↓ NegativeHacker News
Show HN: Puck – Open-source visual editor for React
“This is really slick! A really fluid and intuitive interface. We use (also MIT licensed) extensively at my startup; it attacks the same problem, and it's been incredibly effective (and hackable!). Generally speaking, owning your own CMS data, in your own database, with a…”
- • NeutralHacker News
Show HN: Puck – Open-source visual editor for React
“Puck is focused on providing a solution for non technical folk to build on-brand web pages with their team’s existing React components. This enables them to build web pages with guard rails that respect their brand guidelines. Plasmic is a no-code tool for building websites and…”