llms-txt.io vs llmstxt.studio (2026): which should you pick?

Pick llms-txt.io if

• Fits if your docs are read by AI coding assistants and you want an llms.txt for them
• Works for teams that want the file regenerated when the docs change, from $15 a month

Look elsewhere if

• Not for you if you want to know whether AI search mentions or cites you, as it doesn't track that
• Tight if your site is big: llms-full.txt stops at 20 pages free, 50 on Starter and 100 on Pro
• Watch out: the free API returns only the short llms.txt, and calls past the monthly quota fail until the month resets
• Pricey if you need more than 10 managed sites or a white-label generator, which need the sales-priced Business plan
• Skip it if you want yearly billing, as plans are monthly only

Pick llmstxt.studio if

• Fits if you want a free, detailed check of what AI crawlers can reach on your site
• Works for teams that want an email when an llms.txt or sitemap breaks after a deploy, from Pro

Look elsewhere if

• Not for you if you want to track mentions across AI engines, as the citation check uses one engine it doesn't name
• Tight if you stay free: 3 AI-written files and 50 citation checks, once, never renewed
• Watch out: prices are shown in pounds even from the US, and the page description quotes $19.90 a month with no dollar price behind it
• Watch out: the vendor says Google Search doesn't read llms.txt and no major AI provider has confirmed using it
• Skip it if you need integrations or an API, as none are listed

llms-txt.io

• It produces and checks llms.txt files; it does not track whether AI search engines mention or cite a brand.
• Through the API, llms-full.txt needs Starter or above; the free API plan returns only the shorter llms.txt.
• API calls past the monthly quota return errors until the next month, and unused quota does not roll over.
• Plans are billed monthly in US dollars; the pricing page lists no annual option.

llmstxt.studio

• Prices are shown in pounds by default, from the US too; the meta description says $19.90 a month but no dollar figure appears in the price data.
• The free account's 3 AI generations and 50 citation checks are one-time allowances that do not renew.
• The citation check runs against an AI search engine it does not name, so it is not a multi-engine tracker.
• The vendor says Google Search does not read llms.txt and that no major AI provider has confirmed using it.

llms-txt.io

llms.txt and llms-full.txt generator

Crawls a site and writes spec-following files with AI-written summaries and per-link descriptions; free on the web with no account.

Validator

Lints a file, by URL or pasted text, for structure and readiness for AI agents, and gives a score with what to fix.

Managed sites

Re-checks a site weekly or daily, regenerates only when content changes, and serves the file from a stable URL or pushes it to a webhook.

API

Generate and validate files from scripts, CI or another product with API keys and monthly quotas that reset each calendar month.

Agent Readiness Score

A free scan of 19 checks on whether AI coding agents can reach, find, read and build from a site's public documentation.

llmstxt.studio

AI Readiness Audit

41 checks in five groups: whether AI crawlers can reach the site, find its key pages, understand the content, read structured data and quote it safely.

Named AI crawler checks

Reads robots.txt the way crawlers do and reports whether GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot and Google-Extended are allowed.

llms.txt generator

Writes an llms.txt from the sitemap, with AI-written page descriptions; a free account gets 3 AI generations and Pro has no limit.

Deep Site Crawl

Runs the 18 page-level checks on up to 100 pages a run on Pro or 500 on Premium, showing which pages fail which check.

Audit monitoring

Daily re-audits and sitemap checks on paid plans, emailing only when the score moves, a check flips or the llms.txt disappears.

AI Citation Check

Writes 8 queries from your llms.txt, runs them against an AI search engine and reports where you stand and which competitors were named.

llms-txt.io

• Free$0

  Unlimited web generation, llms-full.txt up to 20 pages, 25 API generations and 2,000 API validations a month.

• Starter$15

  per month for 1 managed site, billed monthly

  Files kept current weekly or daily from a stable URL with a change webhook, 400 API generations a month and llms-full.txt up to 50 pages.

• Pro$49

  per month for up to 10 managed sites, billed monthly

  llms-full.txt up to 100 pages, scheduled regeneration with webhook delivery, 1,500 API generations a month and higher rate limits.

• BusinessCustom

  Up to 250 managed sites, custom volumes and rate limits, and an embeddable or white-label generator. Sold through sales.

llmstxt.studio

• Free£0

  The 41-check audit with fixes, 1 site, 3 AI-written generations ever, 50 citation checks ever and manual monitoring.

• Pro£15.83

  per month for 3 sites, billed annually (£19.99 billed monthly)

  Daily re-audits and sitemap checks with email alerts, 10 deep crawls of 100 pages a month, 100 citation checks and 10 custom prompts a month.

• Premium£40.83

  per month for 20 sites, billed annually (£49.99 billed monthly)

  30 deep crawls of 500 pages a month, 500 citation checks and 50 custom prompts a month, every competitor shown, longer history and priority support.

• EnterpriseCustom

  Unlimited sites and checks, crawls up to 5,000 pages and history kept for the life of the account. Sold through sales.

llms-txt.io

No public discounts listed.

llmstxt.studio

• Annual discount

  Save at least 18% with annual billing

  The pricing page shows Save 18% on annual billing: Pro is £190 a year instead of £19.99 a month, Premium £490 a year instead of £49.99 a month.