# llms-txt.io review (2026): is the free plan enough? > llms.txt generator, validator, API and auto-updating managed files Checked Oct 23, 2026 ยท graded Oct 24, 2026 by ToolGPA. llms-txt.io builds llms.txt and llms-full.txt files from a website, with AI-written summaries and link descriptions, and lints existing files for structure. Paid plans add an API for generating and validating from code or CI, and managed sites whose files are regenerated on a schedule when the content changes and served from a stable URL. It is aimed at documentation sites that want to be read cleanly by AI coding assistants and agents. - **Category:** AI Search Visibility (AEO & GEO) - **Made by:** Lemon Tree Ventures, LLC - **Website:** https://llms-txt.io - **Runs on:** Web - **Who should skip it:** Not for you if you want to know whether AI search mentions or cites you, as it doesn't track that. - **Facts last checked:** Oct 23, 2026 ## Pricing As of Oct 23, 2026, llms-txt.io has a free plan, and paid plans start at $15 per month for 1 managed site, billed monthly. - **Pricing model:** Free plan - **Free plan:** Unlimited use of the web generator with no account, llms-full.txt up to 20 pages, and an API key with 25 generations and 2,000 validations a month. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | 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. | | Business | Custom | Up to 250 managed sites, custom volumes and rate limits, and an embeddable or white-label generator. Sold through sales. | Read from https://llms-txt.io/pricing on Oct 23, 2026. Prices change, so confirm with llms-txt.io before buying. ## Key features - **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. ## Good for - Developer-tool and API companies whose docs are read by coding assistants - Teams that want their llms.txt to update itself as the docs change - Agencies and platforms producing llms.txt files for many sites ## Worth knowing - 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. ## ToolGPA grades **GPA: 3.0 out of 4**, graded Oct 24, 2026. llms-txt.io writes llms.txt and llms-full.txt files from your site, checks existing ones, and on paid plans keeps them current as your docs change. The web generator is free with no account. But free llms-full.txt files stop at 20 pages, and the tool doesn't track whether AI answers mention you at all. - **Value for money: A.** The web generator is free with no account, and a managed site that stays current is $15 a month, under $17.40, which is 60% of where this category's cheaper quarter starts. Pro is $49 for 10 sites. - **Free plan and trial: B.** Unlimited web generation with no account, plus an API key with 25 generations and 2,000 validations a month. The limits: llms-full.txt stops at 20 pages, and keeping files current needs a paid plan. - **Features: C.** A generator, a validator, an agent readiness scan, an API and files that regenerate when content changes. It does the llms.txt job fully, but that's a smaller job than this category's, with no tracking of AI answers. - **Ease of use: B.** No rating on record, but the web generator needs only a URL and no account. The API and webhooks are there for developers who want them. - **Platforms and integrations: B.** Web only, with no desktop or phone app and no named integrations. An API on every plan, the free one included, and webhook delivery let scripts and CI use it. These are ToolGPA's own grades. Graded from this listing, whose facts were read from llms-txt.io's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews. ## Where it stands among AI search visibility tools - llms-txt.io's GPA of 3.0 is higher than 154 of the 157 other AI search visibility tools we grade, and level with 3. - It stands best on value for money (A, above 146 of 157) and worst on features (C, above 6). - Its paid plans start at $15 a month, against a middle price of $59 for the category: 5 of the 128 others that charge start lower. - On features, ease of use and platforms it scores 2.7 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price. The category's chart of price against score: https://toolgpa.com/charts/ai-visibility ## Keep it, or make your own? **Keep it.** Nothing llms-txt.io does is plain enough to make in a weekend. The 2 things listed below take a company. It is one of the better ones too: its GPA of 3.0 is higher than 154 of the 157 other AI search visibility tools we grade. It costs $180 a year. - You could not: A crawler that checks every page of a site. - You could not: An API that other software can build on. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. **Tags:** Public API, Site audit ## Alternatives - [llmstxt.studio](https://toolgpa.com/tools/llmstxt-studio): AI readiness audit and llms.txt generator with scheduled monitoring. [Compare](https://toolgpa.com/compare/llms-txt-io-vs-llmstxt-studio) - [LLMs Ledger](https://toolgpa.com/tools/llms-ledger): Public llms.txt directory with a validator and nightly file monitoring. [Compare](https://toolgpa.com/compare/llms-ledger-vs-llms-txt-io) - [LightSite AI](https://toolgpa.com/tools/lightsite-ai): AI-readable site layer with AI bot analytics and visibility tracking. [Compare](https://toolgpa.com/compare/lightsite-ai-vs-llms-txt-io) - [Known Agents](https://toolgpa.com/tools/known-agents): Analytics and access control for the AI bots that visit your site. [Compare](https://toolgpa.com/compare/known-agents-vs-llms-txt-io) - [Prominara](https://toolgpa.com/tools/prominara): AI visibility tracking with site audits and fixes for agencies. [Compare](https://toolgpa.com/compare/llms-txt-io-vs-prominara) ## Sources The prices, plans, platforms and features above were read from these pages on Oct 23, 2026: - https://llms-txt.io/pricing - https://llms-txt.io/ - https://llms-txt.io/features Page: https://toolgpa.com/tools/llms-txt-io Listed by ToolGPA (toolgpa.com).