Noibu blog

Can Your Session Replay Tool Double as Error Monitoring?

Anthony Tavares

November 10, 2026

Blogs

A session replay tool can show errors, but it is built to show what a shopper did, not to find, rank and route what broke. Fullstory, for example, surfaces error events only when its Console Data Capture setting is on. For checkout and revenue protection, you need errors ranked by revenue at risk, not just visible inside a recording.

TL;DR

Replay answers what did the shopper do. Error monitoring answers what broke, for whom, and what it cost.
A replay add-on can show errors inside sessions, which helps when you already know where to look.
Ask any tool three questions: does it rank by revenue, group duplicates and show the cause?
Cheaper is only cheaper if it covers the job you bought the other tool for.

What does a session replay tool actually show you?

A replay tool records shopper sessions so you can watch where people hesitate, click without result or leave. That is valuable for understanding behavior. Many replay tools now also show errors inside the recording. Fullstory's help center, for example, describes error events in the session event stream, an Error Clicks view of the elements where JavaScript errors were triggered, and error metrics for console errors, network errors, dead clicks and rage clicks. It also states that errors are captured only if Console Data Capture is enabled.

Where does a replay add-on stop?

Two jobs, two starting points

REPLAY STARTS WITH A SESSION

You pick a session or a filter, watch it and spot an error inside it. Best for understanding behavior and confirming a suspected problem.

ERROR MONITORING STARTS WITH THE ERROR

Every error is found, grouped, ranked by revenue at risk and linked back to where it happened. Best for deciding what to fix first and proving the cost.

The difference is the starting point. A replay add-on helps you inspect errors you already suspect. Dedicated monitoring surfaces the ones you do not, which matters because over 90% of website errors are never reported by shoppers.

How do you decide if a replay add-on is enough?

Does it rank errors by revenue?

A list of errors by count tells you what is common, not what is expensive. A rare error on the payment step can cost more than a frequent one on a blog page.

Does it group duplicates and show the cause?

The same error can appear thousands of times across sessions. You need it grouped once, with the stack trace and the code path behind it, so someone can act.

Does it work without extra settings per source?

If error capture depends on a console or network setting being switched on, check that it is enabled everywhere that matters, including checkout.

Does it hand the problem to someone who can act?

Finding an error in a recording is not the same as a ticket or a proposed change. Check what happens after the finding.

What does Noibu do differently?

Noibu starts from the error rather than the session. The Bug Resolution Agent finds the errors shoppers hit, traces them to the root cause, ranks them by revenue at risk and opens a pull request for review. Every agent runs the same loop: find, build, your approval, ship, measure. Nothing reaches the live store until a person approves it. If you already use a replay tool, a free website audit shows what Noibu finds on your store before you change anything.

Noibu is AI for ecommerce operations, the always-on optimization system that keeps online stores running at their best. A team of supervised AI agents finds what's broken, slow, or leaking revenue, does the work, and hands results back for human approval. Trusted by retailers like Free People, Guess, Liquid I.V., and Ariat.

Frequently asked questions

Can session replay replace error monitoring?

Not fully. Replay shows what a shopper did and can show errors inside a session, but it starts from a session you choose to watch. Error monitoring starts from every error, ranks them by impact and routes them to a fix.

Does Fullstory show JavaScript errors?

Fullstory's help center says error events appear in the session event stream and that errors are captured only if Console Data Capture is enabled in the account.

What is the difference between session replay and error monitoring?

Session replay records what a shopper saw and did. Error monitoring finds technical failures, groups them, shows the cause and ranks them by how much revenue they put at risk.

Is a replay add-on cheaper than a separate error tool?

It can be cheaper on the invoice, but only if it covers the job. Check whether it ranks errors by revenue, groups duplicates, shows the cause and hands the problem to someone who can act.

How do I find errors my shoppers never report?

Use monitoring that captures errors automatically across every session. Over 90% of website errors are never reported, so waiting for complaints misses most of them.