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StackBlitz, Inc.
StackBlitz makes a browser-based coding environment where developers can write, run, and share full software projects without installing anything on their computers.
StackBlitz is a software company that gives developers a coding workspace that lives entirely in a web browser. You open a tab, pick a project, and start writing code. Hit run, and the app actually runs right there — no setup, no downloads, no "it works on my machine" headaches. That instant, shareable sandbox made it popular for quick demos, bug reproductions, and teaching.
The company's big technical bet is called WebContainers. Normally, running a full development environment means a server somewhere spinning up a virtual machine and streaming the results back to you — slow and expensive. StackBlitz instead figured out how to run a whole Node.js environment directly inside the browser tab itself, using the browser's own security sandbox. Your laptop does the work, so startup is nearly instant and StackBlitz doesn't have to pay for a server for every user. That is the engine behind its speed and its cost advantage. StackBlitz makes money mainly by selling team and enterprise plans, where companies pay for private projects, collaboration, and admin controls. Its core audience is developers at businesses big and small, plus the huge free crowd of hobbyists and students who use it to try frameworks, share code snippets, and learn. It competes with browser-based rivals and with the traditional habit of just installing tools locally; its edge is that zero-setup, runs-in-your-tab experience.
The founders, Eric Simons and Albert Cavalcante, started StackBlitz in 2017, and the WebContainers technology landed in 2021 as a genuine leap — running Node.js in a browser had long been considered impractical. The company is private and venture-backed, and it has leaned into AI: its Bolt.new product lets you describe an app in plain English and have an AI agent build and run it in the browser. That bet on "prompt-to-running-app" is where much of its recent momentum and ambition sits, and it is also where the competition is fiercest, with well-funded AI coding tools from Microsoft-backed GitHub, Anthropic-adjacent players, and others all chasing the same developers.
Saved answer · last researched 10 Nov 2026