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StackBlitz

Category: AI Developer Tools

An online IDE built on the proprietary WebContainers technology, which allows running full-stack Node.js environments and applications entirely within a web browser. This enables instant, secure, and collaborative development workflows. StackBlitz was founded in 2017. The company is led by Eric Simons. Based in San Francisco, California, USA. Team size: 11-50. Total funding raised: Approximately $135M. Latest round: Series B, $105.5M, 2025-01, led by Emergence Capital. Key investors include ["GV (formerly Google Ventures)","Greylock Partners","Emergence Capital","Insight Partners","Madrona Venture Group","Conviction","MANTIS Venture Capital","Flex Capital","Tribe Capital","Tom Preston-Werner"].

Founded
2017
Headquarters
San Francisco, California, USA
Team size
11-50
Total funding
Approximately $135M

Value proposition

Eliminates the need for local development environment setup, enabling instant, high-fidelity development, bug reproduction, and collaboration in a secure, browser-based environment that works consistently for all users.

Products and solutions

["StackBlitz Online IDE","Codeflow","WebContainers","bolt.new","Bolt Cloud"]

Unique value

The company's core innovation is its proprietary WebContainers technology. This is the first WebAssembly-based operating system that allows a full-stack Node.js environment to run natively inside the browser's security sandbox, offering superior speed and security compared to traditional cloud-based IDEs.

Target customer

Individual web developers, open-source projects, and enterprise software development teams seeking to improve developer productivity and security.

Industries served

["Software Development","Technology","Education","Cloud Computing","E-commerce"]

Technology advantage

Unprecedented speed with environment startups in milliseconds, superior security by isolating processes in the browser's sandbox, and a seamless, high-fidelity development experience that perfectly mirrors a local environment, thus eliminating configuration drift.

How they differentiate

StackBlitz differentiates through its proprietary WebContainer technology, which runs Node.js environments natively and securely within the browser sandbox. This architecture provides significantly faster startup times (under 200ms) and enhanced security compared to competitors like GitHub Codespaces and Replit, which rely on cloud-based virtual machines.

Main competitors

["GitHub Codespaces","Replit","CodeSandbox","Gitpod"]

Key partnerships

["Google","Vercel","Shopify","Cloudflare","Automattic (WordPress.com)","Okta","Netlify","Supabase","AWS Marketplace","Microsoft Azure","Microsoft 365"]

Notable customers

["Google","Shopify","Vercel","Cloudflare","Automattic","Okta"]

Major milestones

["Launch of WebContainers technology, enabling in-browser Node.js runtime","Securing $7.9M in seed funding led by Greylock and GV","Launch of its AI-powered coding agent, bolt.new","Securing a $105.5M Series B funding round at a $700M valuation","Bolt.new reaching $40M ARR within 5 months of launch","Launch of Bolt Cloud platform (August 2025)","Availability in AWS Marketplace (December 2025)","Partnership with Microsoft Azure and Microsoft 365 (May 2026)"]

Growth metrics

Bolt.new reached $40M ARR by March 2025, growing from $0 to $40M in 5 months. The platform surpassed 7 million users globally by December 2025. StackBlitz's original IDE serves over 3 million developers monthly.

Market positioning

Positioned as the fastest, most secure online IDE for web developers and enterprise teams. It targets users who prioritize immediate, reproducible, and high-fidelity development environments that perfectly mirror local setups without the overhead.

Geographic focus

Global

Patents and IP

Information not publicly available. The company's core innovation lies in its proprietary WebContainers technology.

About Eric Simons

Eric Simons is a serial entrepreneur and the co-founder and CEO of StackBlitz. Before StackBlitz, he co-founded Thinkster, an online platform for programming education. His work focuses on making web development faster, more secure, and more accessible to developers.

Official website: