StackMachine

Inactive

Instant sandboxed server environments

Summer 20132 peopleSan Francisco, CA, USA

stackmachine.com ↗Crunchbase ↗See on the Idea Map B2B momentum

About

Stack Machine is a developer tools company based in San Francisco, CA since May 2013. We enable a full-stack understanding of an organizations's codebases and developer environments. Our founders have years of experience running large-scale web services.

From their website

as of Jun 7, 2026stackmachine.com ↗

SaaSUsage-based

StackMachine provides elastic infrastructure for AI applications, offering sandboxed WebAssembly runtimes with sub-5ms cold starts and scalable, per-tenant isolation. It enables deploying Node.js, Python, PHP, WordPress, and other stacks without rewrites, optimized for securely running untrusted or AI-generated code.

The platform runs code inside secure WebAssembly sandboxes to host AI agents and apps, delivering near-instant cold starts (sub-5ms for supported runtimes) and high density by sharing executable binaries across isolated tenants. It supports deploying common stacks (Node.js, Python, PHP, Next.js, WordPress, etc.) without rewrites, with serverless-like automatic scaling, and a pay-for-what-you-use model that meters CPU work rather than wall-clock time. Users describe an app to obtain a live StackMachine URL or deploy via quick actions, and workloads are served from a globally distributed environment designed for short-lived, dynamic tasks.

Who it’s for: Teams and organizations shipping production AI and hosting products who need scalable, sandboxed environments for agent workloads and dynamic code execution

Features

Sandboxed WebAssembly execution
Sub-5ms cold starts for Node.js and Python apps
Secure isolation with shared binaries across tenants
High compute density per server
Automatic serverless-style scaling for traffic bursts
Supports deploying common stacks without rewriting
Live preview link generation from natural-language app descriptions

Mention of production usage by teams shipping AI/hosting products; pricing and documentation sections; status as a platform with dashboards and rapid deployment features (Start building, View documentation).