Hotjar shows you user behaviour. Bloodhound shows you what's breaking.

What Hotjar actually does

Hotjar records user sessions, generates heatmaps showing where users click and how far they scroll, collects in-page feedback surveys, and provides funnel analytics. It's one of the most popular qualitative analytics tools in ecommerce, and it's genuinely useful for understanding user behaviour and informing CRO work.

Hotjar does not: capture JavaScript errors, measure Core Web Vitals from real user traffic, audit third-party script performance, monitor checkout funnels with technical precision, or alert you when something breaks. It's an observation tool, not a monitoring tool.

Bloodhound vs Hotjar: comparison

The fundamental difference

Hotjar answers: “What did users do on my site?” Bloodhound answers: “What broke on my site and how much did it cost?” These are different questions with different tooling.

Both are legitimate questions to ask. But if you're prioritising where to spend your monitoring budget, consider which one has the more direct relationship with revenue. A JavaScript error that breaks the add-to-cart button on mobile Safari costs you a specific, calculable amount of money — and Bloodhound can calculate it. A heatmap showing users scroll past your product description is useful input for a CRO experiment, but its revenue impact is indirect and harder to measure.

Why Hotjar's session replay misses the most important bugs

Hotjar records sessions at a sampling rate — typically 10-20% of sessions, depending on your plan. It also excludes checkout pages from recording in most configurations, due to the payment data sensitivity.

This means the exact place you most need bug visibility — checkout — is the place Hotjar is least likely to show you. And the bugs that affect a small percentage of sessions — a mobile-specific issue, a browser-specific failure — are likely to be underrepresented in the sample.

Bloodhound captures every error event from every session, including checkout (via Web Pixel). There's no sampling on error capture.

Are they complementary?

Yes, and many stores run both. The workflow is:

• Bloodhound alerts you to a JS error affecting a specific page and browser
• You use Hotjar session replay to watch recordings from users who hit that error, to understand what they experienced
• You fix the error and watch the revenue impact metric in Bloodhound improve

Bloodhound is the alert system. Hotjar is the post-mortem tool. Together they give you complete visibility: you know what broke (Bloodhound) and what the user experience looked like when it broke (Hotjar).

When to choose one over the other

If you have budget for one tool:

• Choose Bloodhound if your primary concern is catching bugs, protecting revenue, and maintaining store health. This is the tool that alerts you when something breaks and tells you how much it's costing.
• Choose Hotjar if your primary concern is UX research, CRO, and understanding user behaviour. This is the tool that helps you understand why users make the decisions they do.

For most Shopify stores, error monitoring is the higher-leverage tool — especially if you haven't done it before. The first time you see a bug that's been quietly breaking your add-to-cart button for two weeks, the value is immediately obvious.