Unbounce landing page speed for Google Ads What 7 Unbounce templates scored on mobile.

Our Unbounce results

Unbounce is built for ad landing pages, so we wanted to see how its templates do on a phone. We took 7 of Unbounce's own template previews, including lead generation, agency, law firm, and course pages. We checked each page's code to confirm it was built on Unbounce, then ran it through Google PageSpeed Insights on mobile.

Here is what we found (ClickMend scans, October 2026, 7 pages):

This was the highest median score and the lightest median page in our 8-builder test. One page scored 95, which Google's Lighthouse scoring rates as good. Three pages had an LCP of 2.4 seconds, inside Google's good line of 2.5 seconds.

But the range was wide. Three other pages had an LCP over 10 seconds and scored 42 to 55. Same builder, very different results.

What made the difference between a 95 and a 42? Not page weight. The fastest page was the heaviest of the 7, at 1,727 KB. The slow pages had more blocking time, up to 1,069 ms, and their main headline waited longer to be drawn. Two pages with the same builder and the same tags ended up more than 50 points apart.

That matters for Google Ads because Unbounce users often run A/B tests. Google's own Quality Score help page says the speed your page loads can be the difference between someone bouncing or buying. If one variant is much slower, the test is partly a speed test. Our guide to the landing page part of Quality Score covers why speed matters.

What slowed the pages

• Tags, not the builder. Script was a median 935 KB per page. Of that, a median 829 KB came from Google Tag Manager, Google Analytics, an A/B testing tool, and a data tool that Unbounce runs on its own previews. Unbounce's own page script was small. This is why blocking time was high: a median 400 ms, where Google suggests under 200 ms.
• Unused JavaScript. Flagged on all 7, a median 353 KB, mostly from the tag manager container.
• Files that block the first paint. Flagged on all 7, with estimated savings of 0.3 to 1.1 seconds. Google Fonts, a jQuery file, and Unbounce's own style files were on the list.
• Images. Lighthouse flagged image savings on 6 of 7, from 26 to 291 KB.
• Fonts. Font loading was flagged on all 7.

Layout shift was not a problem. All 7 pages stayed at 0.028 or below, well under Google's 0.1 line.

Fixes for Unbounce pages

• Audit your tags. Every pixel and tool in your tag manager adds script. Keep the Google Ads tag and what you actually use. Remove the rest.
• Keep the headline easy to draw. On the 3 slowest templates, the biggest item was a large text headline, and Lighthouse showed it sat ready but waiting to be drawn. Fewer fonts and fewer scripts in the head help.
• Keep the hero image small and compressed.
• Use one or two fonts and only the weights you need.
• Build the mobile layout on purpose. Hide large desktop-only images on mobile instead of shrinking them.
• When you run an A/B test, test the speed of both versions. A slow variant can lose for speed reasons alone.
• Check the Google Ads conversion tag fires on the thank you page or form submit. Our conversion tracking guide shows how.

Then run the live page through a free ClickMend scan. It names the slow scripts and checks your conversion tag in the same report.

Limits of this test

• We tested 7 pages. A small sample.
• These were template previews, not real ad pages. They carried Unbounce's own tags, which a real page would not have, but a real page would carry yours.
• Lab data from one run per page on a simulated mid-tier phone. Scores move a little each run.
• None of the 7 previews had real-user data in Google's Chrome UX Report.

Compare Unbounce with other ad page builders like Leadpages and ClickFunnels.

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