Rule Engine Comparison: Nected vs Camunda - Enhancing Workflow Automation

Explore the comprehensive comparison of Camunda and Nected rule engines in our latest blog. Delve into the nuances of each platform to understand how they can elevate your business workflow automation.

Rule Engine Comparison: Nected vs Camunda - Enhancing Workflow Automation

Prabhat Gupta

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Rule Engine Comparison: Nected vs Camunda - Enhancing Workflow AutomationRule Engine Comparison: Nected vs Camunda - Enhancing Workflow Automation
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Business rules are the foundation of many business processes. They define how a business should operate and how decisions should be made. However, manually enforcing business rules can be time-consuming and error-prone.

A business rules engine is a software application that can be used to automate the enforcement of business rules. This can help to improve the efficiency, accuracy, and flexibility of business processes.

Camunda Rule Engine is a powerful business rules engine that can be used to automate decision-making, implement business logic, and enforce policies. It is based on the Decision Model and Notation (DMN) standard, which makes it easy to share and reuse rules.

In this blog post, we will discuss the benefits of using the Camunda Rule Engine, the key features of the engine, and some real-world use cases. We will also provide some tips for getting started with Camunda Rule Engine.

Camunda Rule Engine Overview

Camunda Rule Engine is a powerful business rules engine that can be used to automate decision-making, implement business logic, and enforce policies in a variety of applications. It is based on the Decision Model and Notation (DMN) standard, which makes it easy to share and reuse rules.

Some of the key features of Camunda Rule Engine include:

  • Expressive rule language: Camunda Rule Engine uses a powerful rule language that allows you to define complex rules. The rule language is based on the DMN standard, which makes it easy to share and reuse rules.
  • Flexible rule execution: Camunda Rule Engine allows you to execute rules in a variety of ways, including synchronously, asynchronously, and in batches. This makes it easy to adapt the rule engine to the specific needs of your application.
  • Integration with Camunda Workflow Engine: Camunda Rule Engine can be integrated with Camunda Workflow Engine, which allows you to use rules to control the flow of work in your applications. This makes it possible to automate complex business processes and ensure that they are executed in a consistent and predictable way.
  • Scalability: Camunda Rule Engine is designed to be scalable, so you can use it to power even the most demanding applications.

Benefits of Using Camunda Rule Engine

Camunda Rule Engine offers a number of benefits, including:

  • Improved efficiency: Camunda Rule Engine can automate decision-making, which can free up developers and business users to focus on other tasks. This can lead to increased efficiency and productivity.
  • Reduced risk of errors: Camunda Rule Engine can help to reduce the risk of errors by ensuring that decisions are based on business rules. This can help to improve the quality of your applications and protect your business from liability.
  • Enhanced flexibility: Camunda Rule Engine allows you to define rules in a flexible way, which makes it easy to adapt your applications to changing business requirements.
  • Increased scalability: Camunda Rule Engine is designed to be scalable, so you can use it to power even the most demanding applications.
  • Simplified integration: Camunda Rule Engine can be integrated with a variety of other applications, which makes it easy to extend your applications with new functionality.

Overall, Camunda Rule Engine is a powerful tool that can help you to improve the efficiency, accuracy, and flexibility of your applications. If you are looking for a business rules engine that is easy to use, scalable, and flexible, then Camunda Rule Engine is a good option to consider.

Camunda Workflow Engine:

The Camunda Workflow Engine is a powerful tool that allows businesses to model, execute, and monitor their workflows with ease. It provides a comprehensive set of features that streamline the flow of tasks and activities within an organization. Let's take a closer look at some key components and capabilities of the Camunda Workflow Engine.

  1. Workflow Modeling and Execution:
    Camunda offers an intuitive graphical interface for modeling workflows using BPMN (Business Process Model and Notation). BPMN allows users to visually design and define the sequence of tasks, events, and gateways involved in a business process.
    Once the workflow is modeled, the Camunda Workflow Engine takes charge of executing the process based on the defined rules and conditions.
  2. User Task Management:
    In Camunda, user tasks represent activities that require human intervention. The engine can assign tasks to specific users or groups, enabling efficient task management and workload distribution.
    Users receive notifications about pending tasks, and they can interact with the Camunda Tasklist to complete or delegate them.
  3. Event-based Gateway and Message Events:
    Camunda supports event-based gateways, allowing workflows to branch based on events or conditions. This enables dynamic and responsive process flows based on real-time events.
    Message events facilitate communication between different parts of the workflow, enabling message-based interactions between tasks.
  4. Parallel Execution and Sub-processes:
    Camunda Workflow Engine handles parallel execution of tasks, enabling concurrent processing and reducing process completion time.
    Sub-processes allow the modeling of complex and reusable process fragments, improving workflow clarity and maintainability.

The Camunda Workflow Engine's robust features enable businesses to optimize their processes, enhance efficiency, and achieve better control over their operations. It provides a user-friendly interface for process modeling and seamless execution, making it an ideal choice for organizations looking to improve their workflow management.

Camunda Case Management:

Camunda Case Management is a feature of the Camunda Platform that enables the management of complex cases. A case is a collection of tasks, documents, and other artifacts that are related to a specific business process. Camunda Case Management provides a number of features that make it easy to manage cases, including:

  • Case modeling: Camunda Case Management provides a graphical modeling language for modeling cases. This language allows you to define the structure of a case, the tasks that are involved in the case, and the relationships between the tasks.
  • Case execution: Camunda Case Management allows you to execute cases. This means that you can start cases, assign tasks to users, and track the progress of cases.
  • Case monitoring: Camunda Case Management provides a monitoring dashboard that allows you to track the progress of cases. This dashboard shows you the status of each case, the tasks that are assigned to each case, and the deadlines for each task.
  • Case integration: Camunda Case Management can be integrated with other applications. This means that you can use Camunda Case Management to manage cases that are created in other applications.

Camunda Case Management is a powerful tool that can help you to manage complex cases. If you are looking for a way to manage cases in a flexible and scalable way, then Camunda Case Management is a good option to consider.

Comparison of Camunda and Nected:

To provide a clear understanding of how Camunda and Nected differ in their approach to rule execution and workflow automation, we present a comparison based on various relevant parameters. This comparison emphasizes areas where Nected particularly excels.

Feature/Aspect Camunda Nected
User-Friendliness Requires technical expertise in Java, BPMN, DMN Intuitive low-code/no-code platform
Learning Curve Steep, due to need for programming knowledge Minimal, designed for ease of use
Development Speed Slower due to coding and testing processes Rapid rule creation and deployment
Technical Expertise Required High, requires knowledge of Java and BPMN/DMN Low, accessible to non-technical users
Integration with Data Sources Manual integration and coding needed Easy integration with a variety of data sources
Flexibility in Rule Creation Requires coding for complex logic Drag-and-drop interface for complex rule creation
Testing and Deployment Manual testing and deployment processes Simplified testing in staging environment and easy deployment
Automation of Workflows Good for technically complex workflows Ideal for quickly automating business processes
Iterative Development Possible but more time-consuming Highly flexible and fast iterations
Accessibility for Non-Technical Users Limited, more suitable for developers High, designed for users with limited technical background

In determining which rule engine is better suited for specific scenarios, it's essential to consider the user's technical expertise and the nature of the project. Camunda, with its requirement for Java and BPMN/DMN knowledge, is well-suited for technically advanced users who need a high degree of customization and control over complex workflows. It's ideal for scenarios where the intricacies of the workflow demand deep technical integration and coding.

On the other hand, Nected shines in environments where speed, ease of use, and accessibility are paramount. Its low-code/no-code approach makes it an excellent choice for teams with limited technical expertise or those that require rapid development and deployment of rules. Nected is particularly advantageous for businesses looking to automate their processes quickly without getting bogged down in the technicalities of rule creation and workflow management.

Ultimately, the choice between Camunda and Nected depends on the specific needs of the project and the technical proficiency of the users. While Camunda offers robust capabilities for those who can navigate its complexity, Nected provides a more user-friendly and efficient solution for quick and easy rule execution and workflow automation.

Having compared Camunda and Nected, we will now delve into the specifics of executing complex rules in each platform. The following sections will provide detailed insights into how complex rules are executed in Camunda and Nected, highlighting the practical applications of each platform in real-world scenarios.

Executing Complex Rules in Camunda

In this section, we explain how to execute complex rules in Camunda. We focus on the practical steps and provide an example code to demonstrate the process.

Setting Up the Environment

Before executing complex rules in Camunda, it's crucial to set up the necessary environment. This involves several steps:

  1. Camunda BPM Platform: Install and configure the Camunda BPM platform. This platform is where your business processes and decision rules will reside.
  2. Java Development Environment: Ensure you have a Java development environment set up, as Camunda leverages Java for process and rule execution.
  3. Deploying BPMN and DMN: You need to design and deploy a BPMN (Business Process Model and Notation) process and a DMN (Decision Model and Notation) decision table in Camunda. These are the workflow and decision logic, respectively, that your Java code will interact with.

Java Code for Rule Execution:

Here's an example of Java code to execute a complex rule in Camunda:

import org.camunda.bpm.engine.ProcessEngine;
import org.camunda.bpm.engine.ProcessEngines;
import org.camunda.bpm.engine.runtime.ProcessInstance;
import org.camunda.bpm.dmn.engine.DmnDecision;
import org.camunda.bpm.dmn.engine.DmnDecisionTableResult;
import org.camunda.bpm.dmn.engine.DmnEngine;
import org.camunda.bpm.engine.variable.VariableMap;
import org.camunda.bpm.engine.variable.Variables;

public class RuleExecution {
    public static void main(String[] args) {
        // Obtain the process engine
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();

        // Start a process instance
        ProcessInstance instance = engine.getRuntimeService()

        // Obtain the DMN engine
        DmnEngine dmnEngine = engine.getProcessEngineConfiguration().getDmnEngine();

        // Load decision table
        DmnDecision decision = dmnEngine.parseDecision("yourDecisionKey", RuleExecution.class.getResourceAsStream("/yourDecision.dmn"));

        // Set variables for decision evaluation
        VariableMap variables = Variables.createVariables()
            .putValue("inputVariable1", "value1")
            .putValue("inputVariable2", "value2");

        // Evaluate the decision table
        DmnDecisionTableResult result = dmnEngine.evaluateDecisionTable(decision, variables);

        // Handling the result
        result.forEach(decisionRuleResult -> {
            System.out.println("Output values: " + decisionRuleResult.getEntryMap());

Here’s the explanation of the code:

  1. Initialize Process Engine: The code starts by obtaining the default Camunda process engine.
  2. Start Process Instance: We start a process instance using the key of your BPMN process.
  3. Access DMN Engine: The DMN engine, which is a part of the process engine, is accessed.
  4. Load Decision Table: We load the decision table file (DMN file) using its key.
  5. Set Input Variables: Input variables for the decision table are defined. These are the inputs on which the decision logic will operate.
  6. Evaluate Decision Table: The decision table is evaluated with the given inputs.
  7. Handle Results: The output of the decision evaluation is printed or can be used for further logic.

Complexity for Non-Technical Users

While the above steps and Java code showcase the execution of complex rules in Camunda, it's important to recognize the challenges this presents, especially for non-technical users:

  1. Technical Expertise Required: The need for familiarity with Java programming, BPMN, and DMN can be daunting for those without a technical background.
  2. Learning Curve: Understanding the intricacies of Camunda's BPM platform and its integration with Java code requires a significant investment in time and learning.
  3. Maintenance and Updates: Keeping the code and workflows updated and maintaining the system requires ongoing technical oversight.

Recognizing these challenges, it's essential to explore how similar outcomes can be achieved with less complexity. This is where Nected's low-code/no-code environment comes into play. Nected offers a more user-friendly approach, reducing the need for in-depth technical knowledge and simplifying the process of executing complex rules. In the following section, we will delve into how Nected streamlines this process, making it accessible for users regardless of their technical expertise.

Executing Rules Using Nected

Nected is a low-code/no-code platform that enables teams to easily create and execute complex rules. It's designed for a diverse range of users, from product and growth teams to tech teams, facilitating the launch of dynamic workflows rapidly and with minimal technical effort.

Steps to Execute a Rule in Nected

  1. Environment Setup:
    First sign up for a Nected account.
    Connect your data sources using Nected’s connectors to pull and push data. Supported data sources include databases like MongoDB, MySQL, and PostgreSQL, and REST API for HTTP calls.
  2. Unify Data via Datasets:
    Create datasets to unify data across your database. This allows you to directly attach data as input to the rules without manually passing data points. Datasets can be used within rules to fetch data automatically during execution.
  3. Building Complex Rules:
    Use Nected’s intuitive no-code editor to build complex rules. You can choose from simple rules, decision tables, and rule sets.
    Define conditions for these rules using a variety of operators and data points from your datasets or custom attributes.
    You can also write custom JavaScript for specific or complex conditions.
  4. Defining Conditions and Actions:
    Specify rule conditions using logical operators like AND, OR, and NOT, and a combination of dataset attributes and custom input parameters.
    Based on the rule outcome, you can configure actions such as database updates or triggering REST API calls to invoke internal or third-party flows.
  5. Testing and Deployment:
    Test the rule in a staging environment using Nected’s Test Console. This allows you to input values for attributes used in the rule and view the output.
    Once tested, publish the rule for it to become active and usable in your workflows.
  6. Integrating with External Systems:
    Nected allows you to trigger rules via API from internal or third-party systems. This integration is key for automating workflows that interact with external applications or services.


Camunda Rule Engine is a powerful business rules engine that can be used to automate decision-making, implement business logic, and enforce policies. It offers a number of benefits, including improved efficiency, reduced risk of errors, enhanced flexibility, increased scalability, and simplified integration.

Camunda Rule Engine is a versatile tool that can be used to automate a wide variety of business processes. It is easy to use, scalable, and flexible, making it a good option for organizations of all sizes.

If you are looking for a business rules engine to improve the efficiency, accuracy, and flexibility of your business processes, then Camunda Rule Engine is a good option to consider.


Q1. What is the rule engine in DMN?

DMN stands for Decision Model and Notation. It is a standard notation used to model decision rules in a graphical format. DMN allows users to define, model, and manage complex decision logic that can be executed by rule engines. Rule engines like Drools and others support DMN for rule representation and execution.

Q2. What Makes Camunda Unique as a Rule Engine?

Camunda stands out for its strong integration with Java, extensive support for BPMN for workflow automation, and its ability to execute complex decision logic written in DMN (Decision Model and Notation).

Q3. How does Camunda work?

Camunda works by executing BPMN 2.0 workflows using its lightweight process engine. Users design workflows in BPMN diagrams, defining tasks, gateways, and decisions. The process engine interprets and executes these workflows, orchestrating the sequence of tasks and interactions with users or external systems. Throughout the process, Camunda provides real-time visibility and monitoring of ongoing process instances, enabling effective process management and improvement.

Q4. How Does Nected Simplify Rule Execution?

Nected simplifies rule execution through its low-code/no-code environment, allowing users to create and manage rules without deep technical expertise. Its intuitive interface enables quick rule setup and deployment.

Q5. Can Camunda Handle High-Volume Transaction Processing?

Yes, Camunda is designed to efficiently manage high-volume transaction processing, making it suitable for large-scale enterprise applications.

Q6. Is Nected Suitable for Non-Technical Users?

Absolutely. Nected is specifically designed for both technical and non-technical users, offering a user-friendly platform that simplifies complex rule creation and management.

Q7. What Types of Integrations Does Camunda Support?

Camunda supports a wide range of integrations including various databases, event streams, and external services, primarily through Java and REST APIs.

Q8. Can Nected Integrate with External Databases and APIs?

Yes, Nected offers robust integration capabilities with external databases and APIs, allowing seamless data flow and interaction within business processes.

Q9. Can Camunda and Nected Be Used in Regulated Industries?

Yes, both Camunda and Nected can be configured to comply with regulatory requirements in industries like finance and healthcare. They ensure consistent rule execution and provide audit trails for compliance purposes.

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