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Open-source alternatives to Zscaler

Compare community-driven replacements for Zscaler in vpn & zero trust networks workflows. We curate active, self-hostable options with transparent licensing so you can evaluate the right fit quickly.

Zscaler logo

Zscaler

Zscaler is a cloud security platform offering Secure Web Gateway and Zero Trust Network Access solutions. Instead of routing traffic through corporate networks, users connect to Zscaler's cloud, which inspects web traffic for threats and enforces security policies (blocking malicious sites, filtering content). For private applications, Zscaler brokers a secure connection between the user and the app based on identity and context, eliminating the need for VPNs while keeping internal services hidden from the internet. By doing so, Zscaler provides fast, secure access for remote and mobile users and simplifies network security in a cloud-first world.Read more
VPN & Zero Trust Networks
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Key stats

  • 5Alternatives
  • 1Support self-hosting

    Run on infrastructure you control

  • 5Active development

    Recent commits in the last 6 months

  • 2Permissive licenses

    MIT, Apache, and similar licenses

Counts reflect projects currently indexed as alternatives to Zscaler.

All open-source alternatives

Teleport logo

Teleport

Secure unified access proxy for modern infrastructure

Active developmentFast to deployIntegration-friendlyGo

Why teams choose it

  • Short‑lived certificates for all supported protocols
  • Built‑in SSO (GitHub, OIDC, SAML) and mandatory 2FA
  • Unified access proxy with RBAC and access‑request workflow

Watch for

Open source edition limited to GitHub SSO

Migration highlight

Secure remote SSH access for developers

Developers obtain short‑lived certificates via SSO, eliminating static keys and providing audit logs of every session.

NetBird logo

NetBird

Zero-config peer-to-peer VPN with centralized access control

Active developmentFast to deployIntegration-friendlyGo

Why teams choose it

  • Zero‑config WireGuard overlay with automatic peer discovery
  • Granular access policies with SSO/MFA and group sync
  • Cross‑platform agents (Linux, macOS, Windows, mobile, OpenWRT)

Watch for

Self‑hosted setup needs a public domain and open ports

Migration highlight

Remote development environment

Developers connect laptops to office resources securely without VPN configuration.

OpenZiti logo

OpenZiti

Zero‑trust, programmable network fabric for secure application connectivity

Active developmentPermissive licenseFast to deployGo

Why teams choose it

  • Zero‑trust, application‑level access control with certificate‑based identities
  • Dark services and routers that require only outbound connections
  • Programmable REST management API and extensible SDKs for multiple languages

Watch for

Initial setup can be complex for newcomers

Migration highlight

Secure remote access to internal dashboards

Employees connect through dark routers, gaining access only to authorized web interfaces without exposing ports.

Octelium logo

Octelium

Unified zero-trust platform for secure access and deployment

Self-host friendlyActive developmentPrivacy-firstGo

Why teams choose it

  • Unified zero‑trust architecture with L7‑aware, identity‑based access for humans and workloads
  • Dynamic secretless connectivity via WireGuard/QUIC tunnels and client‑less BeyondCorp access
  • Policy‑as‑code control using CEL and OPA for fine‑grained, context‑aware rules

Watch for

Requires a Kubernetes cluster, adding operational overhead for small setups

Migration highlight

Zero‑Trust Remote Access for Distributed Workforce

Employees connect securely via WireGuard tunnels or client‑less portals, with per‑request policies enforcing least‑privilege access to internal apps.

Pomerium logo

Pomerium

Clientless, zero‑trust access proxy for internal web applications

Active developmentPermissive licenseIntegration-friendlyGo

Why teams choose it

  • Clientless, tunnel‑free access via standard browsers
  • Identity‑aware policy enforcement for each request
  • Deployable alongside applications for low latency

Watch for

Requires deployment and management of proxy infrastructure

Migration highlight

Remote employee accesses internal dashboard

Securely logs in via SSO and reaches the dashboard without VPN, with policies enforcing role‑based access.

Choosing a vpn & zero trust networks alternative

Teams replacing Zscaler in vpn & zero trust networks workflows typically weigh self-hosting needs, integration coverage, and licensing obligations.

  • 1 project let you self-host and keep customer data on infrastructure you control.
  • 5 options are actively maintained with recent commits.

Tip: shortlist one hosted and one self-hosted option so stakeholders can compare trade-offs before migrating away from Zscaler.