How your score is calculated

Sellom asks ChatGPT the questions your customers ask it, reads its answers and turns them into a score out of 100. Every point of the score leads back to an answer or a page you can open.

• 01

  The questions

  We read your website to understand what you sell, and where. From it we draw the questions a customer would type: one about your main offer, one about your second offer, one of the “who are the best” kind, one about price. The place is always written into the question. A last question names your company and its website.

• 02

  ChatGPT’s real answers, from France

  Each question is put to ChatGPT with web search enabled, from France, outside any personal account. In the free test, each question is asked 5 times: 25 answers. You read these answers, with the sites it cites.

• 03

  A score out of 100, in three parts

  Readable, out of 20: is your website ready to be read by ChatGPT? Known, out of 30: does ChatGPT find you when it is asked about you by name? Recommended, out of 50: does it name you when a customer looks for what you sell? The three parts are always shown. Your score is their sum.

• 04

  Readable, 20 points

  Your robots.txt file lets ChatGPT’s search robot (OAI-SearchBot) through: 5 points. Your home page can be read, with a title and a description: 5 points. Structured data describes your company: 4 points. A sitemap exists: 3 points. The text of your home page appears without a script: 3 points. If a point could not be checked and ChatGPT already cites your website, that point is granted to you.

• 05

  Known, 30 points

  The question that names you is asked 5 times, for 6 points per answer. ChatGPT identifies the right company: 3.6 points, or 1.8 if it only partly recognises it. It describes the right activity: 1.8 points. It cites your website among its sources: 0.6 points.

• 06

  Recommended, 50 points

  Each answer to a customer question receives a value. You are named first: 1. You are among the first three companies named: 0.8. You are named: 0.6. Only your website appears in the sources: 0.2. Otherwise: 0. The part is worth 50 times the average of these values.

• 07

  The five levels

  Your level is the highest one you reach. Recommended: at least 35 points out of 50 in the Recommended part. Named: you are named in at least 4 of the 20 answers to customer questions. Known: ChatGPT identifies you in at least 3 of the 5 answers when asked about you by name. Readable: at least 12 points out of 20 in the Readable part. Invisible: none of these thresholds is reached.

• 08

  The same score if you take the test again

  ChatGPT’s answers are kept for 7 days: a test taken again within the week gives the same score. Your website, on the other hand, is read again at every test: if you fix it, the Readable part moves straight away. The report shows both dates.

• 09

  How we spot your company

  We look for your company’s name and its domain, subdomains included, in every answer. For the question that names you, a check compares the description ChatGPT gives with what we read on your website. All the answers are in your report: you can read them one by one.

• 10

  Our reading robot

  To write the questions, our robot SellomBot reads the home page of your website, then a few public pages. It announces itself under that name (page sellom.io/bot) and, if the site refuses that name, tries once more as a browser. It reads your robots.txt file: a rule that blocks SellomBot or AI robots does not stop the test, the report shows it, with the lines to fix.

• 11

  The Diagnostic

  The Diagnostic asks 10 customer questions and the question that names you, each 2 times: 22 ChatGPT answers, on top of those of the free test. Each answer is scored out of 20: you are named, 8 points; your place among the companies named, up to 5 points; your name highlighted, 3 points; your website among the sources, 4 points. The Diagnostic score is the average of these scores, brought to 100. The report lists the sites ChatGPT relies on and can be downloaded as a PDF.

• 12

  The Tracking

  The Tracking runs new measurements every month, with the same questions, and alerts you when your results change.

• 13

  What the score measures

  The score describes what ChatGPT answers on the day of the test; it may answer differently on another day, and two measurements taken weeks apart can differ by a few points. Sellom measures your presence in the answers, not your traffic or your sales. Reports already produced keep their score and the rule in force on their date. The test is available in French, English, Spanish and Portuguese.

Method in force since November 10, 2026. Each report keeps the method of its date.