# Methodology > Source: AgentsIndex — https://agentsindex.ai/methodology > Index last updated: 12 November 2026 What gets listed, where the facts come from and how listings stay current. ## The checks behind every listing Each tool page is read off the tool's own site, then read again on a schedule. - **400** tools in the index - **97%** of 400 re-read on their own site this cycle - **90 days** at most between two reads of one tool - **12 Nov 2026** last time we read a tool's site ## Where the facts come from Each listing starts from the vendor's own site: product pages, docs, pricing and changelog. We add GitHub activity for open-source tools, and benchmarks and community discussion where they exist. Every listing links to its sources. ## What we check **The product exists.** The site loads, the app runs or the repo is active. **The price is current.** Taken from the vendor's pricing page on the date shown on the listing. **Features are real.** We look for them in the docs, not just the marketing copy. Listings are written from these public sources, not from hands-on trials. We don't see private pricing or enterprise contracts. ## How tools get listed The team behind a tool [submits it](https://agentsindex.ai/submit). If it fits the index, the team joins with a one-time payment and we research the tool before its page goes live. Own a tool that is already listed? Use **Claim** on its page and show that the product is yours. ## How tools are ordered Featured listings sit in a labelled block at the top of their category and first on related pages. Below them, each category is ranked by what we can confirm about each tool: a public price, an API and docs, independent sources and stated limits. Below the Featured places, paying never moves a listing. ## How listings stay current We re-read the oldest listings first and refresh anything we know has changed: a rename, an acquisition, a new product. Last checked across the index on 12 November 2026. ## Reading the yes, partly and no marks - **Yes**: The tool's own docs or pricing page say it does this. - **Partly**: It does, with a catch: a higher plan, an add-on, a beta or a usage cap. - **No**: Its own pages say it does not. - **Not stated**: Its pages don't say either way. ## How we count the figures ### In our articles - Every number in an article we write comes from our own records of each tool or from a source the article cites, and is checked against them before the article goes out. - Prices are read from each tool's own pricing page, and each ranking shows the days we read them. - The typical price is the middle value of each tool's cheapest paid plan, so free plans stay out of it. If fewer than 5 tools have a price, we give no typical price. - Counts such as how many tools have a free plan use the same records and rules as our category pages, so an article and its category give the same answer. ### In our price tracker - Once a week we read every tool's own pricing page. No AI model reads the page. - A price change counts only when the same plan, in the same currency and billing period, shows the old price and then the new one, each in two readings at least a day apart. - A move of more than 5 times, up or down, doesn't count: at that size it is almost always a different plan or unit, not a new price. - Each change shows the price as the pricing page prints it, not converted or rounded. - Our price changes page lists the last 13 weeks, newest first. Fixes to our own records are not price changes. ### In our study: What AI answers about AI tools cite - Once a month we ask Perplexity and ChatGPT the same set of questions about AI tools and keep each answer with the sources it lists. - This edition counts the 62 answers collected between 6 November 2026 and 7 November 2026, to 31 questions. - A site counts once per answer that lists at least one of its pages, and a site is its main domain, so en.wikipedia.org is wikipedia.org. - Shares are of the 62 answers that listed any source. - A product site is the website of a product listed here. [Read the study](https://agentsindex.ai/data/what-ai-cites-on-ai-tools) ## Who runs AgentsIndex AgentsIndex is written and run by [Team AgentsIndex](https://agentsindex.ai/authors/agentsindex). Every listing, guide and report is published under the site's own name, and the team answers for all of it. ## Changes to a listing Changes a maker asks for are made only on a paid listing. A listing that has never been paid for shows what our own data says. Anyone can report a wrong fact with “Report an error” on a listing, at no cost. We fix it once the tool's own website confirms it. Paying buys changes and speed, never accuracy. ## Where we use AI AI models do the reading and the first drafts. A model reads each tool's own website and drafts its listing. Our articles and guides are drafted by a model from our own data. Checks decide what goes live. Every fact on a listing must point to its source on the tool's website, and a sentence that website does not support is cut. In an article, every figure must match our data and every quote must appear word for word in its source. A second reading checks a sample of facts against each tool's own pages. An article that fails a check is not published.