Architecture‎ Overview

Leapwork is a no-code automation platform that empowers users at all business levels to automate web, desktop, and virtual desktop applications in just minutes. Test cases are built using flowcharts and can be executed without writing a single line of code. This means your team can build, schedule, and run automation flows without the need for specialized technical skills or external consultants.

Leapwork is composed of the three key components:

• Flow: A visual designer used to build and manage automation flows.
• Controller: A server that manages execution, data storage, and scheduling.
• Agent: A runtime service that executes automation flows.

These components work together to support end-to-end automation across your infrastructure, whether hosted on premises, in the cloud, or in a hybrid setup.

Component Overview

• Leapwork Flow is a Windows-based desktop application. It allows users to create automation cases, schedule executions, and view results through dashboards and logs.
• Leapwork Controller is a background service that stores all automation assets (cases, images, schedules, reports) and coordinates execution across Agents.
• Leapwork Agent is the runtime service that executes automation flows on request, either from the Flow or the Controller.

Communication Protocols

Leapwork components communicate using different protocols:

• Flow ↔️ Controller: REST API. This protocol is hosted on the Controller and can also be used by external scripts and integration mechanisms.
• Controller ↔️ Agents: Internal remote-control protocol (similar to VNC, with added security and control)
• Flow ↔️ Agents (during design/preview): Same remote-control protocol

All components can be deployed in protected environments behind firewalls and without internet access if required.

Deployment Scenarios

Leapwork supports three main deployment models. The choice depends on your infrastructure, security policies, and scalability needs.

On-Premises Deployment

In this traditional model, all components, Flow, Controller, and Agents, are installed and maintained within the client's local infrastructure.

Typical Use Case:
Enterprises with specific security requirements or isolated networks.

Characteristics:

• Complete control over infrastructure and data
• No internet access required
• Full support for all types of automation (web, desktop, virtual desktop)

Cloud Deployment

This model hosts both the Controller and Agents in the cloud. Leapwork Flow remains on the user's local environment.

Note:

• Cloud Controller OS support both Windows 11 and Windows Server.
• Cloud Agent OS support both Windows 11 and Windows Server.

Cloud deployments can be configured with different connection methods, including Azure VPN, Azure Firewall or direct deployment via Azure Marketplace.
Typical Use Case:
Teams needing fast deployment, scalability, and remote access without maintaining servers or hardware.

Characteristics:

• No need to manage infrastructure
• Scalable cloud resources
• Supports only web automation with Cloud Agents
• Access secured via VPN, Azure Firewall, or direct access depending on the setup.

Hybrid Deployment

Leapwork supports hybrid setups where components are distributed between local infrastructure and the cloud.

Characteristics:

• Flow always runs on-premises
• Controller can be hosted either on-premises or in the cloud upon request
• Agent can be hosted either remote or in the cloud upon request. Cloud Agents support web automation only.

Hybrid deployments can be configured with different connection methods, including Azure VPN, Azure Firewall or direct deployment via Azure Marketplace. Note: If your test flow includes desktop or mobile automation, Cloud Agents cannot execute it. In that case, select Remote Agents or adjust your schedule accordingly.

Typical Use Case:

• Organizations that combine local infrastructure with cloud components for flexibility, scalability, or gradual migration to the cloud.
• Organizations that want to balance control and scalability, or migrate gradually to a cloud-based setup.
• Organizations that want to keep control of test design and management, while leveraging cloud scalability for execution.

Deployment Summary

Database

In on-premises deployments where the Controller is hosted locally, the database requirements are managed by the client:

• The Leapwork Platform edition uses an onboard SQLite database.
• The Enterprise edition requires a Microsoft SQL Server (license not included). Any edition beyond Express is supported.

In full cloud deployments or hybrid setups where the Controller is hosted in the cloud, Leapwork manages the database infrastructure, licensing, and associated costs.

For more information about how to deploy Leapwork in your organization, please see the Licensing and Deployment page.