Island alternative
The Island alternative that lets you keep your browser.
Island replaces Chrome and Edge with a forked, vendor-hosted browser. Surface delivers enterprise browser security as a managed extension on the browser your users already run — with adaptive detection and data that stay inside your perimeter.
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Why security teams choose Surface over Island
Island solves real problems. But when the requirement is detection that learns your environment, data that never leaves your perimeter, and a rollout that does not touch the browser your users already trust, Surface is the stronger fit.
Detection that learns your environment
Island is built around containment. Surface Vision adds adaptive, on-device phishing detection that fingerprints every page at render time and refines on your real traffic — catching AitM kits and net-new tradecraft no signature has seen, in under a second.
Sovereignty by architecture
Island's management console is hosted by Island on AWS and Azure, so browsing telemetry leaves your perimeter. Surface runs entirely on infrastructure you own — air-gapped if you need it — with no third-party processing and no foreign-jurisdiction data path.
Identity, data, and AI agents in one engine
Beyond DLP containment, Surface unifies step-up identity, session-theft deception, and guardrails for AI agents acting in the browser — mapped to named attack coverage your SOC can verify, not infer.
Switching is a push, not a project
The reason most teams go looking for an alternative in the first place is the migration: replacing everyone's browser is a rollout with retraining, helpdesk load, and compatibility workarounds. Surface skips that entirely.
Keep your browser
Surface installs as a managed extension in the Chrome, Edge, or Firefox your users already open every morning. No second browser, no retraining.
Keep your perimeter
The control plane runs on your infrastructure — Docker, Kubernetes, VMs, bare metal, or fully air-gapped. Telemetry lands in your SIEM, not a vendor cloud.
Keep your patch cadence
No fork sits between Chromium and your fleet. Browser security fixes arrive on the upstream vendor's native timeline, not a rebuild pipeline.
Surface vs. Island, capability by capability
The same data from our full head-to-head, scored on architecture, not marketing. Surface leads on sovereignty, adaptive detection, and deployment; we mark honestly where Island still wins.
| Capability | Recommended  Surface Extension plus on-prem control plane | Island Forked Chromium plus cloud console |
|---|---|---|
| On-premises deployment (no vendor cloud) | Fully supported | Not supported |
| Adaptive browser security (Surface Vision, on-device, signature-free) | Fully supported | Not supported |
| Air-gapped network support | Fully supported | Not supported |
| Native upstream browser patch cadence | Fully supported | Not supported |
| Works with the browser the employee already runs | Fully supported | Not supported |
| Zero migration cost | Fully supported | Not supported |
| Watermarking, screenshot block, copy/paste containment | Partial or limited | Fully supported |
| Managed browsing environment for unmanaged or BYOD endpoints | Partial or limited | Fully supported |
| Hooks into the rendering pipeline below extension APIs | Not supported | Fully supported |
| Full data sovereignty (no third-party processing) | Fully supported | Partial or limited |
| Identity, data, and AI-agent action in one platform | Fully supported | Partial or limited |
| Security Information and Event Management (SIEM) and Security Orchestration, Automation, and Response (SOAR) integration | Fully supported | Partial or limited |
Island has genuine containment depth — watermarking, screenshot blocks, and a fully managed browser for unmanaged and BYOD devices — that an extension does not match. Where a managed browser is the right tool, we say so on the record.
Read the full Surface vs. Island breakdownThe better Island alternative
runs on your terms.
Same browser your users already use. Same SOC stack you already run. Detection that learns your environment and a control plane that never leaves your perimeter.