How would you measure the success of PostHog Session Replay?

Introduction

Session Replay is one of PostHog's oldest and most-loved products. It records what users actually do on a website or mobile app, so teams can watch the clicks, scrolls, errors and rage clicks behind a number on a dashboard. The first 5,000 recordings each month are free, after which teams pay per recording, and mobile replay is an add-on. Replay matters beyond its own revenue: it is often the product that makes analytics "click" for a team, because it shows the why behind a funnel drop. With Replay Vision, PostHog now also uses AI to scan replays for struggles automatically. Measuring Session Replay's success means capturing whether teams learn from recordings, not just whether recordings exist.

Step 1

Product Context (3 minutes)

Key stakeholders:

• Product teams (engineers, designers, PMs, founders): watch replays to debug issues and understand behaviour.
• Support and success teams: look up a customer's session when a ticket arrives.
• End users: are recorded, so their privacy must be protected through masking.
• PostHog: earns usage revenue and drives adoption of other products.

User flow:

1. Team enables recording (on by default for many new web projects) and sets sampling, masking and minimum duration.
2. Recordings are captured and linked to events, errors and the user's person profile.
3. Team finds relevant sessions through filters, playlists, links from funnels and error issues, or Replay Vision summaries.
4. Team watches, comments, shares with colleagues and acts: files a bug, changes a design, or contacts the user.

Lifecycle stage: mature growth. Replay is a high-revenue product with strong competition (FullStory, Hotjar, LogRocket, Microsoft Clarity, which is free) and now an AI layer that changes how recordings are consumed.

Why it matters to PostHog's strategy: replay is the bridge between quantitative data and understanding. A team that clicks from a funnel drop into a replay is using two products together, which is the core of PostHog's all-in-one bet.