Modernise legacy business applications for cloud — no rewrites

WebStream enables organisations and ISVs to run forms-based, database-driven Windows applications in a browser while enforcing strict control over file access, printing, clipboard use, identity, and full audit visibility.

architecture-beta
    group g_user(internet)[User]
    service browser(internet)[Browser] in g_user

    group g_acp(server)[WebStream ACP]
    service policy(server)[Policy Identity SSO Audit Trail] in g_acp

    group g_runtime(cloud)[App Runtime]
    service app(server)[Windows Business App] in g_runtime

    junction j1
    junction j2

    browser:R --> L:j1
    j1:R --> L:policy
    policy:R --> L:j2
    j2:R --> L:app
  

Control how users interact with legacy applications — not just how they access them.

The Problem

Legacy Windows applications block cloud adoption

Across accounting firms, engineering offices, legal practices, medical clinics, and government departments, critical Windows applications prevent cloud adoption.

Require RDP or VPN

Users need complex infrastructure just to access their applications, creating security and management overhead.

Heavy file and print dependency

Applications rely on file open/save dialogs and local printing, incompatible with browser-based delivery.

No audit visibility

User activity within the application is invisible to security and compliance teams.

Cannot be rewritten

These applications are too complex, too critical, or the source code is no longer available.

Operational friction

Remote work requires workarounds that frustrate users and burden IT teams.

Security concerns

Traditional access methods create attack surfaces and compliance gaps.

"The challenge is not usually the legacy application.

The blocker is the lack of control, governance, configuration, security and the visibility over how your users interact with it."

— Solutions Architect (SA)
The Solution

The WebStream Approach

WebStream virtualises the interaction layer between the user and the Windows application.

File Open / Save

Browser-native and policy controlled

Print Control

Controlled PDF output to designated paths

Clipboard

Governed and monitored transfers

Identity & SSO

Enforced authentication and access control

Full Audit Trail

Every interaction logged and observable

Deployment

Simple to Deploy

Start with a single server PoC and scale to enterprise-grade multi-AZ deployments.

architecture-beta
    group vpc(cloud)[AWS VPC]

    service browser(internet)[Browser] in vpc
    service alb(server)[ALB HTTPS] in vpc
    service ec2(server)[WebStream Server] in vpc
    service s3(disk)[S3 Storage] in vpc

    browser:R --> L:alb
    alb:R --> L:ec2
    ec2:R --> L:s3
        

View full architecture patterns →

Use Cases

Designed for Real Business Applications

WebStream is optimised for forms-driven, document-heavy applications — our natural sweet spot.

Accounting & Finance

ERP & Inventory

Legal Practice

Engineering & Project

Medical & Clinic

Government Admin

Get Started

Choose Your Path

For Enterprise & AWS Teams

WebStream ACP

App Control Plane — the control and governance layer for legacy Windows business applications running in AWS.

Learn About ACP
For Developers & ISVs

WebStream Core

Open source engine demonstrating browser-driven file handling, print redirection, and clipboard integration.

View on GitHub