Securely deliver legacy Windows apps.
No VPN required.

AppTunnel securely delivers your legacy desktop applications to users anywhere — with always-on encrypted tunnels to your databases and backend services. Self-hosted on your infrastructure.

Full lifecycle for legacy apps

Everything from deployment to connectivity to access control — on infrastructure you own.

Smart Deployment

COM/.NET/OLE registration, delta updates, INI config management, and per-user secrets — all handled automatically.

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Always-On Tunnels

TCP/UDP tunnels to any database or backend service — establish at login, stay open, zero user friction. No VPN, no firewall changes.

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Multi-Tenant & Environments

Run Prod, QA, and Dev from one server. Serve multiple isolated tenants. Control exactly who can access what, per environment.

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Per-User Secrets

Each user stores their own encrypted credentials in the tray. AES-256-GCM at rest, injected at launch — admins can't read them.

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File Stores

Automatically sync shared certificates, reference data, and templates to user machines. Content-addressed, delta synced, environment-scoped.

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One-File Distribution

Generate a single pre-configured executable for each tenant. Users download and run it — server address, auth, and tenant config are already embedded.

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Ready to modernize your legacy apps?

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