How do I create a Matomo segment for one AI assistant?

Definition: A Matomo segment filters analytics reports to visits matching saved conditions. A segment for one AI assistant combines the AI acquisition channel with the assistant's recorded referrer name, such as ChatGPT.

Key facts

• As of October 2026, Matomo's segmentation guide describes filtering reports to smaller audience groups using specific criteria.
• Matomo's AI traffic guide documents Channel Type Is ai for visits from supported assistants, including ChatGPT and Perplexity.
• Matomo's segment reference lists separate referrerType and referrerName conditions; combining them with AND requires both to match.
• The segment editor guide documents TEST for inspecting matching visits and Save & Apply for saving the segment.

Which source conditions select one assistant?

An acquisition channel groups visits by how visitors arrive. Matomo's AI terminology guide describes the AI Assistants channel as visits referred by recognised assistant domains, with chatgpt.com as an example. AI Agent reports concern automated systems accessing the website directly.

For a ChatGPT referral segment, the conditions combine the channel and the recorded assistant name. This configuration uses the dimensions and equality operator in Matomo's segment reference:

Channel Type | Equals | ai
AND
Referrer Name | Equals | ChatGPT

The corresponding segment expression is:

referrerType==ai;referrerName==ChatGPT

The reference defines the semicolon as AND. The channel condition selects AI acquisitions; the name condition narrows that group to ChatGPT. Matomo's AI traffic documentation uses the channel condition alone for traffic across supported assistants.

How is the segment created and saved?

Matomo's custom segment instructions provide the creation workflow:

1. Visitors > Segments or the dashboard's Segment selector provides access to Create New Segment, which opens the editor.
2. A descriptive name, such as ChatGPT referrals, identifies the saved segment.
3. The channel and referrer name conditions shown above are joined with AND. Each condition contains a dimension, comparison operator and value.
4. The value field offers suggestions from collected data; these provide the assistant name in its recorded format.
5. TEST opens a log of matching visits for inspection. After that log closes, Save & Apply saves the segment.

How is the saved segment used and checked?

Matomo's Using Segments documentation explains that selecting a saved segment from the All Visits selector updates the displayed reports. The pencil icon beside its name reopens the editor for changes.

The AI traffic guide identifies Acquisition > AI Assistants as the assistant source report and Visitors > Visits Log as the place to inspect labelled referral visits. Historical visits retain their original channels after the AI channel update, while the dedicated assistant report can show earlier data through internal referrer filtering.

Related terms

• AI referral traffic
• Where do I find AI assistant traffic in Matomo?
• How do I compare Matomo landing pages for AI traffic?
• How do I inspect individual AI referral visits in Matomo?

FAQ

Can I share the saved segment with colleagues?

Matomo's segment settings guide says a superuser can set its visibility to All Users. Segments created by other users are visible to their creator and superusers by default.

Can I use the segment in conversion reports?

Yes. Matomo's AI measurement guide describes applying an AI channel segment to Goals and Ecommerce reports, including goal completions and ecommerce revenue when enabled.

Does the segment capture every visit influenced by an assistant?

Matomo's terminology guide states that assistant referral attribution depends on available referrer information, so visits without that information can be absent from the segment.

Sources

1. Matomo, "Segmentation", undated
2. Matomo, "How to track and analyse traffic from AI Assistants (like ChatGPT) in Matomo reports", undated
3. Matomo, "Segmentation in the API", undated
4. Matomo, "Build custom segments in Matomo", undated
5. Matomo, "What are AI Assistants in Matomo", undated
6. Matomo, "Using Segments", undated
7. Matomo, "Measure AI traffic, conversions, and KPIs with Matomo", undated

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