Leaning Technologies launches secure browser-based code sandboxes for AI

Leeds, England, United Kingdom, February 18, 2026 — Leaning Technologies today launches BrowserPod for Node.js, the first engine of BrowserPod, a universal execution layer for browser-based compute. BrowserPod provides a sandboxed runtime API that lets agents run untrusted code next to the user, inside the browser, with low latency and strong data locality and security.

The Node.js engine enables teams building agentic tools, AI coding platforms, and web IDEs to execute Node.js workloads safely in-browser while reducing dependence on per-session cloud sandboxes and their associated costs.

As software becomes increasingly agentic, more applications need to execute untrusted code with strong safety and security guarantees. The key question is not whether code will run — it’s where it runs, what it can access, and how teams can keep costs and risk under control. Today, the default answer is often cloud-based sandboxes, which add infrastructure overhead and expand the data surface area.

BrowserPod shifts execution to the browser: it uses WebAssembly and the browser security model to run sandboxed workloads locally, while still supporting multi-process execution and networking features needed for real applications.

BrowserPod for Node.js runs Node workloads in a sandboxed environment that includes a virtual filesystem and a constrained interface to underlying system primitives. This allows developers to run existing Node-based tools and applications with no changes, while keeping execution isolated within the browser context.

BrowserPod includes Portals, a secure networking feature that lets products expose services running inside a pod through controlled, shareable URLs, enabling use cases such as live previews, interactive demos, and collaborative troubleshooting without standing up dedicated backend infrastructure for every session.

BrowserPod is designed for agentic code execution, MCP-style tools, web-based IDEs, interactive documentation, and any product where arbitrary code execution is a core feature. By moving more execution client-side, BrowserPod can reduce cloud sandbox load, improve responsiveness, and keep sensitive inputs and outputs closer to the user by default.

Stefano De Rossi, founder and CEO of Leaning Technologies, said,

“Agentic software changes the economics and the security model of code execution. BrowserPod is built as a language-agnostic execution layer for browser-based compute — so teams can run untrusted code where the user already is, with lower latency and less dependence on per-session cloud sandboxes. BrowserPod for Node.js is the first engine, and it sets the foundation for broader runtime support.”

Alessandro Pignotti, founder and CTO of Leaning Technologies, said,

“AI products increasingly need a safe place to execute code — not just generate it. BrowserPod provides a sandboxed runtime API with the primitives real products need: process isolation, filesystem, and controlled networking through Portals. Node.js is our first engine, and we’re expanding the platform to support additional runtimes and more complete Linux-class workloads over time.”

About the company: BrowserPod is developed by Leaning Technologies, a deep tech software company specializing in WebAssembly-based development tools and browser compute technologies. The company’s portfolio includes Cheerp (C/C++ compilation to WebAssembly), CheerpJ (Java Runtime Environment in the browser), and CheerpX (browser-based virtualization of x86/Linux). Leaning Technologies serves customers worldwide, including organizations such as Automatic Data Processing, Inc. (ADP), NASA, Moody’s Corporation, Ticketmaster, Euronext, and Dalkia (of the EDF Group). Leaning Technologies builds WebAssembly powered developer tools and compute infrastructure, including BrowserPod, Cheerp, CheerpJ, and CheerpX.

Contact Info:
Name: Liam McCaffrey
Email: Send Email
Organization: Leaning Technologies
Website: https://browserpod.io

Release ID: 89183701

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