Accurate tracking of Segment sessions

For teams using Segment, we’ve made it easier to track sessions more accurately, especially when exporting data to a warehouse.
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Unlike GA4, Segment doesn’t natively include a session_start signal. That’s why we’ve introduced a Session start event to help you identify when a session truly begins.

Why this matters?

Segment’s lack of a clearly defined session concept has made it difficult to track session-level behavior and aggregate metrics like average session length or sessions per user.
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What’s new?

We now trigger a Session start event:

• On the first pageview within a new browser session.
• Only once per session, even if the user opens multiple tabs.
• A new session is defined by the user closing and reopening their browser.

This allows for cleaner reporting, improved behavioral analytics, and more accurate session attribution in your downstream tools.

For the full tracking plan and documentation, check our help center!