OptaPlanner
Java Constraint Solver to solve vehicle routing, employee rostering, task assignment, maintenance scheduling, conference scheduling and other planning problems. (by kiegroup)
budibase
Budibase is an open-source low code platform that helps you build internal tools in minutes 🚀 (by Budibase)
| OptaPlanner | budibase | |
|---|---|---|
| 30 | 348 | |
| 407 | 24,909 | |
| 3.7% | 1.1% | |
| 2.8 | 10.0 | |
| about 2 hours ago | 6 days ago | |
| Java | TypeScript | |
| Apache License 2.0 | GNU General Public License v3.0 or later |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
OptaPlanner
Posts with mentions or reviews of OptaPlanner.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-06-23.
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OptaPlanner VS timefold-solver - a user suggested alternative
2 projects | 23 Jun 2023
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Resource Scheduling
However, if you need to solve constraints etc., see: https://www.optaplanner.org/
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Anything you wish there was an open source solution for?
Try looking for something built around Optaplanner - basically taking the end game of rostering and working backwards.
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Seeking Advice and Collaboration for an Open-Source Worker Cooperative Platform Project
OptaPlanner takes some of the items tracked in tool like Odoo and creates plans based on them. I.E. how do you manage shifts while juggling multiple constraints (Jerry can only work weekends, Jeff can only work afternoons, Jim can work weekends but only on double time, etc.)
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[Combinatorial Optimization] What is a good algorithm, or genre of algorithms that I should read up on for an optimization problem with a set of sets, where at least one element of each set is required?
There is a library out there called Optaplanner that is designed for optimization of NP complete problems. It is hard to tell if that is exactly what this is, but I think you should be able to use this regardless.
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Searching for something to schedule IT helpdesk shifts
Just stumbled upon https://www.optaplanner.org. Looks very interesting but also really overkill.
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Easy-to-use school scheduling software?
OptaPlanner - a generic scheduler.
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Non profit Healthcare clinic looking for self hosted or cheap cloud alternative employee shift scheduling app?
OptaPlanner
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Self-hosted schedulers?
I've never used it but it sounds like OptaPlanner may be a scheduler in the same vein?
- Algorithm for Assigning Flights to Planes
budibase
Posts with mentions or reviews of budibase.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-05-06.
- Top 8 Open-Source Tools for Web Application Development
- Top 15 Fastest-Growing Open-Source Low-Code Projects on GitHub in 2025
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I Found Perfect CMS after Years of Trial and Error
Many providers such as Directus, Appsmith, or Budibase all have ways to fully customize the viewing and editing experience of each field.
- The Best Open-Source Alternatives to AppSheet in 2025
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Top 4 Open Source Products to Help You Avoid Hidden Costs in Low-Code Platforms
Website:https://budibase.com/
- Why Open-Source Alternatives Are Replacing OutSystems in 2025?
- Budibase: Create business apps, automate workflows in minutes
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How to Build Internal Tools 100x Faster
It is possible to speed up the development and delivery process for many internal applications by using no-code or low code tools. These vary in offerings from open source to SaaS, including popular ones like AirTable, BudiBase, Retool, NocoDB and others. These can all greatly help speed up delivery times.
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Budibase 3.0 – Open-source alternative to Retool
- Drag and drop RBAC, Views, Row actions, automation branching, AI column, and more.
https://github.com/Budibase/budibase
Learn more about the features:
https://budibase.com/blog/updates/v3/recap/
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Ask HN: Anybody used Retool for production, user-facing app?
Retool is not designed for external use cases. Better going with a tool like Bubble or a low code platform that doesn't have an end-user license.
I'm the cofounder of Budibase. An open source alt to Retool. You could try the open source plan:
https://github.com/Budibase/budibase/
What are some alternatives?
When comparing OptaPlanner and budibase you can also consider the following projects:
Choco - An open-source Java library for Constraint Programming
RSS Fulltext Proxy - Get full-text content for any RSS-feed.
or-tools - Google's Operations Research tools:
nocodb - 🔥 🔥 🔥 Open Source Airtable Alternative
JaCoP - Java Constraint Programming solver
ToolJet - Low-code platform for building business applications. Connect to databases, cloud storages, GraphQL, API endpoints, Airtable, Google sheets, OpenAI, etc and build apps using drag and drop application builder. Built using JavaScript/TypeScript. 🚀