StackBlitz

stackblitz.com ↗

Browser-based development environments for frontend, Node.js and JavaScript work.

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SI Score: 80/100
Pricing: Not confirmed
Free plan: Not confirmed
Sign-up required: Not confirmed

Ask SI about StackBlitz

Answers use saved listing facts and recorded sources.

Homepage screenshot

SI REVIEWBased on the site's own pages, in a directory managed by people

What it does

StackBlitz runs development environments inside the browser tab using WebContainers, a WebAssembly-based micro operating system. The site presents Bolt.new for turning text into working web apps, Codeflow for opening an in-browser IDE from repos, issues and pull requests, an API and JavaScript SDK for embedding GitHub repos and creating projects, StackBlitz Teams for private team workspaces, and an Enterprise Server option. Documentation, pricing, case studies, blog and community links are provided, along with a registration route.

The home page states that all compute occurs inside the browser rather than on remote servers, and it contrasts this with legacy cloud-based IDEs. It lists products and pages for Enterprise Server, Integrations, Design Systems, WebContainer API, Web Publisher and Platform, plus Case Studies, Pricing and Legal pages. The documentation site covers Guides, Codeflow, API, WebContainers, Teams and Enterprise sections, describes integrating StackBlitz for interactive playgrounds and educational use, and links to a GitHub repository and a Discord community. An enterprise sales contact link and a registration link are present.

Best for

Running frontend and Node.js projects in a browser IDECreating web apps from text prompts with Bolt.newOpening in-browser IDE sessions from GitHub repositories, issues and PRsEmbedding StackBlitz projects through the API and SDK

SI Score

80/100

#1 in Coding & AI Platforms

Based on published information. No hands-on task test.

Method 2.0 · Published source review Assessed Oct 28, 2026Score ceiling for this evidence: 84/100.

Product usefulness 80

Evidence

StackBlitz documents browser-run Node/full-stack development, text-to-app creation and team/project collaboration. GitHub is required to save or collaborate but not to view/edit, providing an explicit boundary for the complete browser development workflow.

Limits: Source-researched AI assessment reviewed by a separate native AI worker. No hands-on product test or human verification is claimed.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checks100/100

HTTPS: yes
Homepage answered with HTTP 200
Privacy policy link: found
Terms link: found
Contact or about page: found

We check that these pages exist, not what they say. Ownership and company details are not verified.

Checked Oct 18, 2026.

HTML accessibility checks97/100

Page language set: en
Mobile viewport: yes
Images with a text alternative: 12 of 13
Main heading (h1): yes

Automated checks on the homepage HTML only. This is not a full accessibility audit.

Checked Oct 18, 2026.

Homepage HTML response100/100

First byte after 581 ms
Homepage HTML loaded in 0.6 s
HTML size 35 KB

Measured once from our server. Images, scripts and your own connection are not included.

Checked Oct 18, 2026.

Trackers in homepage HTML88/100

Third-party trackers in the homepage code: Google Tag Manager

Only the homepage HTML is checked. Trackers loaded later by scripts, and what the service does with your data, are not covered.

Checked Oct 18, 2026.

Page date hints100/100

A copyright year is a weak sign of upkeep. It does not prove the content is current.

Checked Oct 18, 2026.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

stackblitz.com/
- Product usefulness evidence
- Basic website checks (separate check)Checked Oct 18, 2026
- HTML accessibility checks (separate check)Checked Oct 18, 2026
- Homepage HTML response (separate check)Checked Oct 18, 2026
- Trackers in homepage HTML (separate check)Checked Oct 18, 2026
- Page date hints (separate check)Checked Oct 18, 2026
stackblitz.com/pricing
- Product usefulness evidence
stackblitz.com/privacy-policy
- Basic website checks (separate check)Checked Oct 18, 2026
stackblitz.com/terms-of-service
- Basic website checks (separate check)Checked Oct 18, 2026

Checks without a source link

PricingUnknownChecked Oct 18, 2026
Free planUnknownChecked Oct 18, 2026
Sign-up requiredUnknownChecked Oct 18, 2026
PlatformsUnknownChecked Oct 18, 2026
APIUnknownChecked Oct 18, 2026
Open sourceUnknownChecked Oct 18, 2026

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