Why Most Testimonial Widgets Slow Down Your Site (And How We Fixed It)

The Problem with Traditional Widgets

Most testimonial widgets work the same way:

1. You extract a script tag.
2. The script loads on the client's browser.
3. The script then fetches data from an API.
4. The widget renders, pushing content down (Layout Shift).

This is bad for Core Web Vitals and bad for conversion.

The Zero-Fetch Approach

At Proofi, we treat testimonials as static content. They don't change every second.

When you use our widget, we pre-compile the necessary CSS and HTML logic. The data is injected directly into window objects or rendered serverside if you use our React component.

Result

• 0ms blocking time.
• 0 Layout Shifts.
• 100 Lighthouse Score.

This is why top performance marketers are switching to Proofi.