Source: https://seerepo.com/compare/gatsbyjs/gatsby/vs/stenciljs/core
Markdown source: https://seerepo.com/compare/gatsbyjs/gatsby/vs/stenciljs/core.md
Description: gatsby and core share 3 technologies: prompts, Autoprefixer, and PostCSS. Both are written in TypeScript.

# gatsby vs core

gatsby and core share 3 technologies: prompts, Autoprefixer, and PostCSS. Both are written in TypeScript.

- [gatsbyjs/gatsby](https://seerepo.com/r/gatsbyjs/gatsby): React-based framework with performance, scalability, and security built in.
- [stenciljs/core](https://seerepo.com/r/stenciljs/core): A toolchain for building scalable, enterprise-ready component systems on top of TypeScript and Web Component standards. Stencil components can be distributed natively to React, Angular, Vue, (+ more) and traditional web applications from a single, framework-agnostic codebase.

## What they share and what sets them apart

- In common: prompts, Autoprefixer, PostCSS
- Only in gatsby: React, Express, @gatsbyjs/reach-router, better-queue, Contentful, express-graphql, react-reconciler, lmdb, history, cache-manager, cache-manager-fs-hash, graphql-http, react-server-dom-webpack, GitHub, @mdx-js/react, node-html-parser, remark-gfm, sharp, prop-types, theme-ui, @emotion/react, Normalize.css, Gatsby, strict-ui, react-instantsearch-dom, @feedback-fish/react, prism-react-renderer, react-error-boundary, react-icons, react-markdown, unist-util-remove, glamor, ink, ink-select-input, ink-spinner, unist-util-visit, remark-mdx, remark-mdxjs, remark-parse, remark-stringify, unified, @hapi/joi, enquirer, joi, boxen, progress, @emotion/styled, file-type, graphiql, cxs, rss, react-jss, vfile, gray-matter, mdast-util-mdx, mdast-util-to-hast, mdast-util-toc, rehype-infer-description-meta, remark, accessible-nprogress, styled-components, styled-jsx, styletron-engine-atomic, styletron-react, react-typography, @contentful/rich-text-react-renderer, Cheerio, valid-url, postcss-flexbugs-fixes
- Only in core: css-what, postcss-safe-parser, postcss-selector-parser, parse5, pixelmatch

## Side by side

| | gatsby | core |
|---|---|---|
| Size | 344,142 lines written, 1,362 code files | 180,037 lines written, 595 code files |
| Who writes it | 0% of its commits signed by AI. With GitHub Copilot and Claude Code | 0% of its commits signed by AI. With GitHub Copilot and Claude Code |
| Activity | Last push November 9, 2026, 21,541 commits, 55,916 stars | Last push November 9, 2026, 8,382 commits, 13,153 stars |
| Tests | 1,769 test files. 22.8% of its code files have a test that imports them | 1,020 test files. 33.9% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, gatsby or core?

gatsby, with 344,142 lines written; core has 180,037.

The proof: [gatsbyjs/gatsby's code at commit 0ac6c88](https://github.com/gatsbyjs/gatsby/tree/0ac6c88a72c4dfd4d541e3ac43c664343e8e15b6)

### Which has more GitHub stars, gatsby or core?

gatsby, with 55,916 stars; core has 13,153.

The proof: [gatsbyjs/gatsby on GitHub](https://github.com/gatsbyjs/gatsby)

### Which has more tests, gatsby or core?

gatsby, with 1,769 test files; core has 1,020.

The proof: [gatsbyjs/gatsby's code at commit 0ac6c88](https://github.com/gatsbyjs/gatsby/tree/0ac6c88a72c4dfd4d541e3ac43c664343e8e15b6)

### Which was updated more recently, gatsby or core?

Both got their last push on November 9, 2026.

The proof: [stenciljs/core's commits on GitHub](https://github.com/stenciljs/core/commits)

## Sources

- gatsbyjs/gatsby: Read on November 10, 2026, at commit 0ac6c88 (https://github.com/gatsbyjs/gatsby/tree/0ac6c88a72c4dfd4d541e3ac43c664343e8e15b6)
- stenciljs/core: Read on November 10, 2026, at commit bb880de (https://github.com/stenciljs/core/tree/bb880de3cf2f4428903ecbbd875f4b9cf37d5ce6)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.