Alternatives to Fern for agent-readable content

These are the other docs platforms in the rubric, plus any platform Fern is compared with directly. Each carries one sourced difference. Where a head-to-head exists, the sentence is its verdict-neutral difference; otherwise it is the key where the two scores are furthest apart, with the evidence behind the alternative's score.

• Mintlify Docs platform, 15 of 16
  Fern serves llms.txt for every navigation node (sections, versions, tabs, API references, changelogs) and accepts lang and excludeChangelog filters; Mintlify serves one root llms.txt that links split indexes under /_llms when it passes 100,000 characters. Source, read 4 November 2026. Full comparison.
• ReadMe Docs platform, 13 of 16
  ReadMe scores each project against the Agent-Friendly Docs spec inside its AI Discoverability panel; Fern documents agent directives prepended to every markdown page that point agents to .md URLs and llms.txt. Source, read 4 November 2026. Full comparison.
• Scalar Docs platform, 11 of 16
  Scalar leaves hidden pages out of llms.txt and llms-full.txt; Fern leaves pages that fall back to default-language content out of locale indexes and serves custom llms.txt for the default locale only. Source, read 4 November 2026. Full comparison.
• GitBook Docs platform, 11 of 16
  GitBook scores 1 on llms.txt linking against 2 for Fern. The docs page links the files; a home page or header link by default is not documented. Not test-built: publishing needs a GitBook account. Score from the documentation page cited, read 2026-11-04. Source, read 4 November 2026.
• Redocly Docs platform, 12 of 16
  Redocly scores 1 on llms.txt linking against 2 for Fern. Linking from pages is not documented on the page read. Not test-built: the hosted Redocly product needs an account (the open CLI was built, see below). Score from the documentation page cited, read 2026-11-04. Source, read 4 November 2026.
• Stoplight Docs platform, 6 of 16
  Stoplight scores 0 on llms.txt generation against 2 for Fern. No documented generator; none found on docs.stoplight.io. Not test-built: a Stoplight workspace needs an account. Score from the documentation page cited, read 2026-11-04. https://docs.stoplight.io/llms.txt (404 on the read date), read 4 November 2026.

Fern itself: 14 of 16 on the rubric. Read its profile. Scores come from test builds and cited documentation read 4 November 2026; see the method.