Report Summary

  • 60

    Performance

    Renders faster than
    76% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 77% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 99

    SEO

    Google-friendlier than
    93% of websites

customer.io

Your Customer Engagement Platform

Page Load Speed

1.8 sec in total

First Response

11 ms

Resources Loaded

1.3 sec

Page Rendered

476 ms

customer.io screenshot

About Website

Welcome to customer.io homepage info - get ready to check Customer best content for United States right away, or after learning these important things about customer.io

Leverage marketing automation and customer data in a single Customer Engagement Platform to personalize your customer communications and drive more engagement. Start engaging your customers like never...

Visit customer.io

Key Findings

We analyzed Customer.io page load time and found that the first response time was 11 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

customer.io performance score

60

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

53/100

25%

SI (Speed Index)

Value3.9 s

82/100

10%

TBT (Total Blocking Time)

Value630 ms

47/100

30%

CLS (Cumulative Layout Shift)

Value0.045

99/100

15%

TTI (Time to Interactive)

Value8.4 s

38/100

10%

Network Requests Diagram

customer.io

11 ms

customer.io

29 ms

project-27ed602b.css

19 ms

bgn0vji.js

206 ms

60166117.js

277 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 23% of them (10 requests) were addressed to the original Customer.io, 20% (9 requests) were made to Use.typekit.net and 7% (3 requests) were made to Pixel.prfct.co. The less responsive or slowest element that took the longest time to load (463 ms) relates to the external source Use.typekit.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 233.2 kB (50%)

Content Size

470.8 kB

After Optimization

237.6 kB

In fact, the total size of Customer.io main page is 470.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 50% of websites need less resources to load. Javascripts take 266.8 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 13.6 kB

  • Original 18.8 kB
  • After minification 18.7 kB
  • After compression 5.2 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 13.6 kB or 72% of the original size.

Image Optimization

-15%

Potential reduce by 19.5 kB

  • Original 133.9 kB
  • After minification 114.4 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Customer needs image optimization as it can save up to 19.5 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-59%

Potential reduce by 157.1 kB

  • Original 266.8 kB
  • After minification 266.7 kB
  • After compression 109.7 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 157.1 kB or 59% of the original size.

CSS Optimization

-84%

Potential reduce by 43.0 kB

  • Original 51.3 kB
  • After minification 51.3 kB
  • After compression 8.3 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Customer.io needs all CSS files to be minified and compressed as it can save up to 43.0 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 23 (72%)

Requests Now

32

After Optimization

9

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Customer. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

customer.io accessibility score

91

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

customer.io best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

customer.io SEO score

99

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Customer.io can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Customer.io main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph data is detected on the main page of Customer. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: