Gatsby: vendor profile

In short

Gatsby prerenders every page by default and builds a 404.html but leaves the HTTP status to the host. Netlify has owned Gatsby Inc. since 2023-02-01, yet the gatsbyjs.com footer still reads Gatsby, Inc. The latest release, 5.16.1, is dated 2026-02-10. gatsbyjs.com returned 404 for /llms.txt.

At a glance

standards.txt gatsby

llms-txt               = partial
markdown-negotiation   = no statement
markdown-twin          = no statement
initial-html           = supports
real-404               = partial
vary-accept            = no statement

1 supports, 2 partial or announced, 3 no statement.

Gatsby Framework

Gatsby is a React framework that prerenders every page to static HTML at build time by default (SSG), with deferred generation and SSR per page. It builds a 404.html, while llms.txt and sitemaps come from plugins.

Type: Framework
Operator, as the facts below state it: Netlify; the gatsbyjs.com footer still reads Gatsby, Inc.
Home page: www.gatsbyjs.com, answered HTTP 200 on 2026-11-05
Last read: 5 November 2026

What it does for this layer

Gatsby's rendering options guide names static site generation as the default, so every page is prerendered to HTML, CSS and JavaScript at build time. [primary source] source, read 5 November 2026.
Since Gatsby 4, pages can opt into Deferred Static Generation or SSR per page; DSG needs the build server kept running with gatsby serve. [primary source] source, read 5 November 2026.
Gatsby builds the page at src/pages/404.js into a 404.html file, the name many static hosts use for their not-found page. [primary source] source, read 5 November 2026.
Gatsby's 404 guide leaves the status code to the host, and sites served another way need a custom rule to serve 404.html for missing paths. [primary source] source, read 5 November 2026.
Gatsby's built-in Head export sets page titles and meta tags; support arrived in gatsby@4.19.0, and the docs allow JSON-LD script blocks inside it. [primary source] source, read 5 November 2026.
The official gatsby-plugin-sitemap writes sitemap-index.xml for all pages, but only in production builds. [primary source] source, read 5 November 2026.
The Gatsby plugin library lists gatsby-plugin-llms-txt, marked as a Community Plugin, which writes an llms.txt from CMS or other source data at build time. [primary source] source, read 5 November 2026.
Gatsby 5.16.0 (January 2026) added React 19 and Node.js 24 support as a non-breaking release, per the Gatsby release notes. [primary source, 2026-01-26] source, read 5 November 2026.
On 2026-11-05 `npm view gatsby` reported 5.16.1, published 10 February 2026, as the latest Gatsby release. [observed, 2026-02-10] source, read 5 November 2026.
Gatsby's version support page lists v5 as the Active Long-term support line since November 8, 2022, and v4 as maintenance until Q4 2023. [primary source] source, read 5 November 2026.
Netlify announced on February 1, 2023 that it had acquired Gatsby Inc., the company behind the open source Gatsby framework. [primary source, 2023-02-01] source, read 5 November 2026.
gatsbyjs.com carries a site-wide banner moving Gatsby Cloud customers to Netlify, while its footer still reads "© 2026 Gatsby, Inc.". [primary source] source, read 5 November 2026.
On 2026-11-05 gatsbyjs.com returned 404 for /llms.txt, answered Accept: text/markdown on the home page with text/html, and returned a real 404 for a made-up path. [observed, 2026-11-05] source, read 5 November 2026.
The gatsbyjs/gatsby repository on GitHub is published under the MIT license. [primary source] source, read 5 November 2026.

Products and plans

Plans and prices as the vendor's own pages showed them on the date read.
Product	What it is	Price	As of	Source
Gatsby	Open source React framework that prerenders sites to static HTML, with optional deferred static generation and SSR.	Free, open source MIT license	2026-11-05	source

Standards

The six standards this site tracks; no statement means the pages read said nothing.
Standard	Status	What the vendor's pages say	Source
llms-txt	partial	Only through gatsby-plugin-llms-txt, which the Gatsby plugin library marks as a Community Plugin; no official plugin found.	source
markdown-negotiation	no statement	No statement found in the rendering options, Head API, 404 or release notes pages; gatsbyjs.com answered Accept: text/markdown with HTML.	none
markdown-twin	no statement	No statement found in the Gatsby docs or official plugin pages read about .md copies of pages.	none
initial-html	supports	The rendering options guide calls SSG the default, with the entire site pre-rendered into HTML at build time.	source
real-404	partial	Gatsby builds 404.html, but the 404 guide says hosts outside the default convention need a custom rule to serve it for 404 errors.	source
vary-accept	no statement	No statement found in the Gatsby rendering options, 404, Head API or gatsby-plugin-sitemap pages about a Vary header.	none

Checks on its own site

Readings of gatsbyjs.com, the vendor's own website, which describe that site and not the product.
Reading	Result	Date
Home page request	HTTP 200; H1 in the initial HTML: yes; 129 words; 0 JSON-LD blocks	2026-11-05
Request with Accept: text/markdown	HTTP 200, text/html, Vary: Accept-Encoding	2026-11-05
/llms.txt at the host root	HTTP 404, text/html, 38 KB	2026-11-05
A made-up path	HTTP 404	2026-11-05
Ora score, cached	34, grade D	2026-09-04
Cloudflare keyless scan	20, L1 Basic Web Presence	2026-11-05

What it does not do

Gatsby ships no sitemap until gatsby-plugin-sitemap is added, and that plugin produces nothing in gatsby develop.

Related pages on this site

Sources

Gatsby home page https://www.gatsbyjs.com/, read 5 November 2026
Rendering Options | Gatsby https://www.gatsbyjs.com/docs/conceptual/rendering-options/, read 5 November 2026
Adding a 404 Page | Gatsby https://www.gatsbyjs.com/docs/how-to/adding-common-features/add-404-page/, read 5 November 2026
Gatsby Head API | Gatsby https://www.gatsbyjs.com/docs/reference/built-in-components/gatsby-head/, read 5 November 2026
gatsby-plugin-sitemap | Gatsby https://www.gatsbyjs.com/plugins/gatsby-plugin-sitemap/, read 5 November 2026
gatsby-plugin-llms-txt | Gatsby https://www.gatsbyjs.com/plugins/gatsby-plugin-llms-txt/, read 5 November 2026
v5.16 Release Notes | Gatsby https://www.gatsbyjs.com/docs/reference/release-notes/v5.16/, read 5 November 2026
Gatsby Framework Version Support | Gatsby https://www.gatsbyjs.com/docs/reference/release-notes/gatsby-version-support/, read 5 November 2026
Netlify Acquires Gatsby Inc. to Accelerate Adoption of Composable Web Architectures https://www.netlify.com/press/netlify-acquires-gatsby-inc-to-accelerate-adoption-of-composable-web-architectures/, read 5 November 2026
GitHub - gatsbyjs/gatsby: React-based framework with performance, scalability, and security built in. · GitHub https://github.com/gatsbyjs/gatsby, read 5 November 2026

Last reviewed 5 November 2026