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builder.io

https://builder.io· First analyzed 28 Apr 2026· Updated 28 Apr 2026
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builder.io
Desktop screenshot of builder.io
Mobile screenshot of builder.io
Mobile

Sponsored

Hosting Provider

Fastly, Inc.

IP Address

151.101.1.195

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Montreal, Canada

ASN

AS54113

Organization

Fastly, Inc.

Server

Google Frontend

CDN

CloudFront

Nameservers

dns2.registrar-servers.com.dns1.registrar-servers.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
548 ms10%
Speed Index
712 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.1 MB
101 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Platform
AWS CloudFront
CDN
CloudFront

Technology Stack

8 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Analytics

1
Google Analytics

Tag Managers

1
Google Tag Manager

Languages

1
Go

Frameworks

1
Express

Customer Support

1
Zendesk

SEO Analysis

C65/100
20
4
2
Meta Tags14/15
Content3/12
Headings6/8
Technical18/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social4/5
Freshness0/4
Mobile3/4
Indexability3/3
B
builder.iobuilder.io

Builder.io: Collaborative Development Platform

Ship faster with less back-and-forth. Builder connects designers, PMs, and engineers to your real codebase and design system.

Title Length46 chars

Recommended: 50-60 chars (~268px / 580px)

Description Length125 chars

Recommended: 120-160 chars

Issues (2)

  • • Very thin content (0 words). Search engines need substantial content for ranking.
  • • Most images missing alt text (373/423) — critical for accessibility and SEO

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,219 URLs

robots.txt

10 rules

Sitemap reference found

Local SEO

Local Search Readiness

6/100
Poor
2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F33/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
2/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:1%
Words:1,797
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
B
71/100
13
Passed
2
Critical
1
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
18/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
15/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
3/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
56/100
D
213 mg
CO₂e / view
2.1 MB
Page Weight
50%
Cleaner Than
New Visitor
243 mg
vs
Returning (cached)
122 mg
Annual (10K/mo)
25.5 kg
Emission Segments
Data Center
10 mg
Network
63 mg
Device
140 mg
Resource Breakdown
JavaScript
360.0 KB
CSS
1.6 KB
HTML
621.8 KB
Other
1.1 MB
Green Hosting Verified
Fastly, Inc.
Provider Match
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

121d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

30.07.2025

Valid Until

27.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

*.builder.io

SHA-256 Fingerprint

83:7D:BD:37:A7:2A:0C:D8:B5:74:5F:DC:B3:1F:C6:34:94:96:47:2B...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers
content-type, accept, authorization, x-builder-sdk, x-builde...
access-control-allow-methods
GET, POST, PUT, DELETE, OPTIONS, PATCH
access-control-allow-origin
*
access-control-allow-private-network
true
age
19
cache-control
🟡 5s(public, max-age=5, stale-while-revalidate=86400, stale-if-er...)
Good Warning Issue

Email Infrastructure

Google Workspace

Score

93

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

alt3.aspmx.l.google.com
alt1.aspmx.l.google.com
aspmx.l.google.com
alt4.aspmx.l.google.com

+1 more

Domain Information

builder.io

Domain Age
12y 11m

Created

19.05.2013

Expires

19.05.2027

Last Updated

24.04.2026

Registrar

NameCheap, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner
OneTrust
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: OneTrust
Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
D
51/100
Not Mobile Friendly396 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica + Poppins

WCAG Fail
69/100
Readability
/30
19/30

19px · LH --

Hierarchy
/20
20/20

2.95x ratio · ✓ H1→H6

WCAG
/25
14/25

1:1 min contrast

Performance
/25
16/25

2 fonts · 14 req

Heading Font

Helvetica

Sans56px

Body Font

Poppins

Sans19px

Contrast Ratio

1:1

44 issues

Reading Comfort

~36 CPL

Narrow lines
56px
h1
40px
h2
24px
h3
19px
p

✅ Excellent readability: 19px body text is ideal for all devices.

❌ Low contrast: 44 elements fail WCAG AA (min 1.0:1). Increase text/background contrast.

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

✅ Lean font stack: 2 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFonts

Color Palette

6 unique colors
2.39:1 Fail Dark
#000000
Background· 64.2%
#434c51
Secondary· 3.6%
#f8f8f8
Primary· 0%
#0d1833
Accent· 4.3%
#6db4c2
Secondary· 3.1%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

1
OneTrustEnterprise

Cookie consent and privacy compliance tools

2

Categories

3

Total Tools

1

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

4 Resources

3
Scripts
1
Styles
1
Async
1
Defer

Top Script Sources

cdn.cookielaw.org(2)cdn.jsdelivr.net(1)

Website Identity

builder.io

12 years old
Location detected: 🇨🇦 Canadavia ip
NameCheap, Inc.📧 Google Workspaceen

Sponsored

Last analyzed: 28 Apr 2026 at 07:26

Historical Analysis & Change Tracking