--- title: "Prerender.io: vendor profile: Agent Ready HTML" description: "Prerender.io, a host or CDN: 1 of 6 standards stated as supported, 8 sourced facts, dated plans and what it does not do." canonical: https://agentreadyhtml.com/vendors/prerender-io/ site: "Agent Ready HTML" last_updated: 2026-11-05 section: "Vendors" --- # Prerender.io: vendor profile: Agent Ready HTML > Prerender.io, a host or CDN: 1 of 6 standards stated as supported, 8 sourced facts, dated plans and what it does not do. Source: https://agentreadyhtml.com/vendors/prerender-io/ Site: Agent Ready HTML Last reviewed: 2026-11-05 # Prerender.io: vendor profile In short Prerender.io judges a page ready by counting open network requests, unless the page sets window.prerenderReady itself. Only requests routed by user agent get the cached HTML. The API has a /recache endpoint to refresh a page after a content change. Starter costs $59 a month for 30,000 renders, and Growth costs $169. ## At a glance **standards.txt** prerender-io ```text llms-txt = no statement markdown-negotiation = no statement markdown-twin = no statement initial-html = supports real-404 = partial vary-accept = no statement ``` 1 supports, 1 partial or announced, 4 no statement. **Prerender.io** Host, CDN or edge product Dynamic rendering service that renders JavaScript pages in a headless browser, caches the HTML and serves it to search crawlers and AI crawlers, with meta tags that set the status code the cached copy returns. Type [Host, CDN or edge product](https://agentreadyhtml.com/vendors/by-type/host-or-cdn/) Home page [prerender.io](https://prerender.io/), answered HTTP 200 on 2026-11-05 Last read 5 November 2026 ## What it does for this layer - Prerender.io's docs say it serves cached HTML to AI crawlers and search engines, and that accuracy depends on status codes, page readiness signals, cache management and cookie consent handling. \[primary source\] [source](https://docs.prerender.io/docs/best-practices-for-crawler-ready-pages), read 5 November 2026. - By default Prerender.io caches a page and answers with 200 OK; a meta tag named prerender-status-code with the value 404 or 301 in the head overrides the status, and prerender-header can carry a Location for the 301. \[primary source\] [source](https://docs.prerender.io/docs/best-practices-for-crawler-ready-pages), read 5 November 2026. - Prerender.io caches exactly the status code the origin returns, so a missing page that the origin answers with 200 is cached and served to every crawler as a 200 soft 404. \[primary source\] [source](https://docs.prerender.io/docs/404-page-is-cached-as-200), read 5 November 2026. - Prerender.io guesses when a page is ready by counting in-flight network requests, and a page can set window.prerenderReady to false and then true to control when the snapshot is taken. \[primary source\] [source](https://docs.prerender.io/docs/best-practices-for-crawler-ready-pages), read 5 November 2026. - The Prerender.io API has a /recache endpoint so a site can refresh a cached page when its content changes instead of waiting for expiry. \[primary source\] [source](https://docs.prerender.io/docs/best-practices-for-crawler-ready-pages), read 5 November 2026. - Prerender.io lists Starter at $59 a month for 30,000 renders, Growth at $169 a month for 100,000 renders and Pro at $419 a month for 500,000 renders, with custom Enterprise Plus pricing. \[primary source, 2026-11-05\] [source](https://prerender.io/pricing/), read 5 November 2026. - Prerender.io says on its pricing page that it has supported businesses with search visibility since 2014. \[vendor claim\] [source](https://prerender.io/pricing/), read 5 November 2026. - Prerender.io says 30 percent of bot traffic now comes from AI crawlers and that only 25 percent of AI crawlers can fetch JavaScript without executing it. \[vendor claim\] [source](https://prerender.io/ai-search/), read 5 November 2026. ## Products and plans | Product | What it is | Price | As of | Source | | --- | --- | --- | --- | --- | | Prerender.io | Headless-browser rendering and HTML cache served to crawlers through a middleware or CDN integration. | From USD 59; Starter, 30,000 renders a month, 30-day free trial | 2026-11-05 | source | ## Standards | Standard | Status | What the vendor's pages say | Source | | --- | --- | --- | --- | | llms-txt | no statement | No llms.txt feature in the pages read. | none | | markdown-negotiation | no statement | Prerender.io returns rendered HTML, not markdown, in the pages read. | none | | markdown-twin | no statement | No markdown output in the pages read. | none | | initial-html | supports | Crawlers and agents get cached, fully rendered HTML of JavaScript pages. | source | | real-404 | partial | The cached status is whatever the origin returns, or the value of a prerender-status-code meta tag. | source | | vary-accept | no statement | Not covered in the pages read. | none | ## Checks on its own site | Reading | Result | Date | | --- | --- | --- | | Home page request | HTTP 200; H1 in the initial HTML: yes; 1,394 words; 3 JSON-LD blocks | 2026-11-05 | | Request with Accept: text/markdown | HTTP 200, text/html, Vary: Accept-Encoding, Accept-Encoding,Cookie | 2026-11-05 | | /llms.txt at the host root | HTTP 200, text/plain, 7.1 KB, starts with an H1 | 2026-11-05 | | A made-up path | HTTP 404 | 2026-11-05 | | Ora score, cached | Not available: GET /api/score returned 404 DOMAIN_NOT_SCANNED | 2026-11-05 | | Cloudflare keyless scan | 33, L1 Basic Web Presence | 2026-11-05 | ## What it does not do - Prerender.io does not change what human visitors receive; only requests routed to it by user agent get the cached HTML. ## Related pages on this site - [Hosts, CDNs and edge products in this section](https://agentreadyhtml.com/vendors/by-type/host-or-cdn/) - [The Plain Fetch viewer](https://agentreadyhtml.com/viewer/) ## Sources 1. [Prerender.io: home page](https://prerender.io/) https://prerender.io/, read 5 November 2026 2. [Best practices for crawler-ready pages](https://docs.prerender.io/docs/best-practices-for-crawler-ready-pages) https://docs.prerender.io/docs/best-practices-for-crawler-ready-pages, read 5 November 2026 3. [Why is Prerender.io caching my 404 pages as 200?](https://docs.prerender.io/docs/404-page-is-cached-as-200) https://docs.prerender.io/docs/404-page-is-cached-as-200, read 5 November 2026 4. [Prerender Pricing Plans: Find a Plan to Fuel Your Visibility](https://prerender.io/pricing/) https://prerender.io/pricing/, read 5 November 2026 5. [AI Search SEO with Prerender to Boost AI Visibility](https://prerender.io/ai-search/) https://prerender.io/ai-search/, read 5 November 2026 Last reviewed 5 November 2026 Edition Crawl 2026-11-04 Page updated 2026-11-05 Method How the viewer reads a page, how a file is graded and how a platform is scored: [the method page](https://agentreadyhtml.com/method/).