Freedom251 › Business Rules Management Software
OpenL Tablets
What OpenL Tablets is
OpenL Tablets is a free, open-source business rules engine and decision management system that turns structured Excel tables into executable application logic. It supports Excel formats starting with Excel 97 and table types for decisions, lookups, spreadsheet calculations, decision trees and algorithms. OpenL Studio provides a web-based environment for editing and managing rules, with guided wizards, inline cell editing and type-safe checks that link errors to affected cells. Rule Services can run rules as REST services, Kafka consumers or producers, or providers for Java interfaces; rules can also be used in Maven projects and interoperate with Java classes and methods. Its repository uses Git, databases and blob storage, with versions, metadata, WebDAV access and role-based access control. Analysis features include tracing, explanations, unit tests, benchmarks, what-if analysis, and checks for gaps and overlaps. Rules can have effective and expiration dates, with deployment management, staging, consistency checks and live updates. The downloadable demo runs in single-user mode and includes a local Git repository with examples and tutorials.
Who it suits
It suits teams that want business rules authored in Excel tables and consumed by applications, including business users and Java or Maven project teams. The single-user demo may suit someone exploring the included examples and tutorials.
What it does well
- Supports Excel formats starting with Excel 97.
- Offers five types of rule tables.
- Rules can run through REST, Kafka or Java interfaces.
- Includes unit tests, tracing and what-if analysis.
- Repository supports versions, metadata and role-based access.
What to know first
- The downloadable demo runs in single-user mode.
- The demo uses a local Git repository.
- The product and its parts use the GNU LGPL license.
Limits
The downloadable demo runs in single-user mode and includes a local Git repository. The product is free under the GNU Lesser General Public License.
Getting started
- Visit https://openl-tablets.org/.
- Choose a download route: the demo bundle, Docker Hub images, source code, or Maven Central artifacts.
- Use the demo bundle to explore the included example projects and tutorials; it runs in single-user mode.
- For supported environments, use Windows 11, Windows Server 2022, Ubuntu 24.04 LTS, or macOS 15 with Java 21, Tomcat 10.1, or Jetty 12.0.
Verdict
OpenL Tablets connects spreadsheet-based rule authoring with testing, repository controls and several execution options. Note that its downloadable demo is restricted to one user; the product and its parts are licensed under the GNU LGPL.
Questions
Is OpenL Tablets free?
Yes. Its pricing model is free, and the product and its parts are licensed under the GNU Lesser General Public License.
What kinds of rules can it create?
It supports decision, lookup, spreadsheet calculation, decision tree, and algorithm tables based on structured Excel tables.
How can applications execute its rules?
Rule Services can expose rules through REST, Kafka consumers or producers, and providers for Java interfaces. Rules can also be used in Maven projects and interoperate with Java classes and methods.
What platforms and environments does it support?
Listed platforms include API, Linux, macOS, self-hosted, web, and Windows. Supported environments include Windows 11, Windows Server 2022, Ubuntu 24.04 LTS, and macOS 15, with Java 21, Tomcat 10.1, or Jetty 12.0.
What is included in the demo download?
It includes OpenL Studio and RuleServices, plus a local Git repository with example projects and tutorials. The demo runs in single-user mode.
Where can users get support?
The maker directs users to its GitHub discussion forums. It asks support requests to include the OpenL version, Java version and vendor, and operating system and version.
Facts from OpenL Tablets's own pages
- Demo limitation
- The downloadable demo runs in single-user mode and includes a local Git repository with example projects and tutorials. · openl-tablets.org, 4 Oct 2026
- Distribution
- The downloads page offers a demo bundle of OpenL Studio and RuleServices, Docker Hub images, source code, and Maven Central artifacts. · openl-tablets.org, 4 Oct 2026
- Download limit
- The downloadable demo bundle runs in single-user mode and includes a local Git repository with example projects and tutorials. · openl-tablets.org, 4 Oct 2026
- Editing and validation
- The web editor includes guided wizards and inline cell editing, while type-safe checks report errors with links to the affected cells. · openl-tablets.org, 4 Oct 2026
- Excel-based rules
- It treats tables in Excel files as application logic and supports Excel formats starting with Excel 97. · openl-tablets.org, 4 Oct 2026
- How it works
- It uses structured tables in Excel files to represent executable business rules. · openl-tablets.org, 4 Oct 2026
- Integrations
- The product describes Maven and Java integration, Java wrappers, and exposing rules as services; Rule Services can execute rules through REST and Kafka. · openl-tablets.org, 4 Oct 2026
- Java and Maven integration
- Rules can be used in Maven-based projects and interoperate with Java classes and methods. · openl-tablets.org, 4 Oct 2026
- License
- The product and its parts are licensed under the GNU Lesser General Public License. · openl-tablets.org, 4 Oct 2026
- Product
- OpenL Tablets is an open-source business rules engine and decision management system. · openl-tablets.org, 4 Oct 2026
- Purpose
- OpenL Tablets is an open-source business rules engine and decision management system. · openl-tablets.org, 4 Oct 2026
- Repositories
- The Rules Repository uses Git, databases, and blob storage, and the feature page describes WebDAV access and fine-grained role-based access control. · openl-tablets.org, 4 Oct 2026
- Repository
- The rules repository uses Git, databases, and blob storage, and supports versions, metadata, and WebDAV access. · openl-tablets.org, 4 Oct 2026
- Rule authoring
- Users can create decision, lookup, spreadsheet calculation, decision tree, and algorithm tables. · openl-tablets.org, 4 Oct 2026
- Rule formats
- It supports decision, lookup, spreadsheet calculation, decision tree, and algorithm or flow tables. · openl-tablets.org, 4 Oct 2026
- Rule services
- Rule Services can execute rules as RESTful services, Kafka consumers or producers, and providers for Java interfaces. · openl-tablets.org, 4 Oct 2026
- Security
- Role-based access control provides fine-grained policies for access to rules assets and operations on them. · openl-tablets.org, 4 Oct 2026
- Studio
- OpenL Studio is a web-based environment for editing and managing rules. · openl-tablets.org, 4 Oct 2026
- Support
- The maker points users to documentation, videos, a forum, and a contact page for help. · openl-tablets.org, 4 Oct 2026
- Supported environments
- The supported platforms page lists Windows 11, Windows Server 2022, Ubuntu 24.04 LTS, and macOS 15, with Java 21, Tomcat 10.1, or Jetty 12.0. · openl-tablets.org, 4 Oct 2026
- Testing and analysis
- Features include rule tracing, explanations, unit tests, benchmarks, what-if analysis, and checks for gaps and overlaps. · openl-tablets.org, 4 Oct 2026
- Versioning and deployment
- Rules can have effective and expiration dates, and the platform supports deployment management, staging, consistency checks, and live rule updates. · openl-tablets.org, 4 Oct 2026
- Who it is for
- The maker describes it as intended to let business people author rules that applications can execute and consume. · openl-tablets.org, 4 Oct 2026