What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

buildbuild.io

https://buildbuild.io· First analyzed 13 Apr 2026· Updated 13 Apr 2026

Export

buildbuild.io

Mobile

Sponsored

Hosting Provider

Webflow

webflow.com

IP Address

198.202.211.1

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS209242

Organization

Webflow, Inc

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-45-b.gandi.net.ns-30-a.gandi.net.ns-17-c.gandi.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

456 ms10%

Speed Index

593 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

41 KB

37 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Webflow

Technology Stack

8 Technologies Detected

Analytics

Libraries

CSS Frameworks

Fonts

Tag Managers

Marketing

CDN

SEO Analysis

C67/100

Meta Tags14/15

Content9/12

Headings6/8

Technical14/25

E-E-A-T0/7

Images3/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

buildbuild.iobuildbuild.io

buildbuild | Construction-focused project management software

Radically easier project management. Focus on construction and decision making, not on gathering information and paperwork.

Title Length61 chars

Recommended: 50-60 chars (~373px / 580px)

Description Length123 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (34/55) — critical for accessibility and SEO

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

22 URLs

robots.txt

1 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

15/100

Poor

5 11 2

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

Sponsored

AI & LLM Readiness

D42/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

0/25

Citation

9/25

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.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:10%

Words:693

Token eff.:Optimal

Sections/1K:7.2

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary129w

Descriptive Headingsavg 3.6w

Canonical URL

Open Graph3/3

Twitter Card1/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

69/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

15/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

7/15

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

9/15

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.

3 recommendations

•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.

60/100

A+

5 mg

CO₂e / view

41.0 KB

Page Weight

95%

Cleaner Than

New Visitor

6 mg

Returning (cached)

3 mg

Annual (10K/mo)

612 g

Emission Segments

Data Center

1 mg

Network

1 mg

Device

3 mg

Resource Breakdown

JavaScript

28.8 KB

Fonts

1.1 KB

HTML

11.1 KB

Green Hosting Not Verified

Webflow

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

41%Poor

Interactive

HTTPS

WAF

65d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

20.03.2026

Valid Until

18.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.buildbuild.io

SHA-256 Fingerprint

CB:CB:6F:D1:A6:E0:2A:15:79:CC:44:E5:B6:21:77:65:04:B1:C7:B3...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

296136

alt-svc

h3=":443"; ma=86400

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9eb92fcba97cd2a6-FRA

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

alt2.aspmx.l.google.com

alt3.aspmx.l.google.com

alt1.aspmx.l.google.com

alt4.aspmx.l.google.com

+1 more

Domain Information

buildbuild.io

Domain Age

5y 4m

Created

03.12.2020

Expires

03.12.2026

Last Updated

11.12.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

71/100

Mobile Friendly1 breakpoint

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.

Viewport

width=device-width, initial-scale=1

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Ppobjectsans + Inter

WCAG Partial

72/100

Readability

/30

24/30

16px · LH 1.50

Hierarchy

/20

18/20

2.5x ratio

WCAG

/25

15/25

2.8:1 min contrast

Performance

/25

15/25

System fonts

Heading Font

Ppobjectsans

Sans40px

Body Font

Inter

Sans16px

Contrast Ratio

2.8:1

1 issue

Reading Comfort

~42 CPL

Narrow lines

40px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 46/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 2.8:1).

⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.5x larger than body text.

GGoogle Fonts Buy on MyFontsFlesch 46

Color Palette

8 unique colors

Light

#ffffff

Background· 16.8%

#c9e35c

Primary· 36.4%

#bbd54d

Accent· 25.9%

#805bd5

Accent· 7%

#2f2c41

Secondary· 5.7%

#eaf2cd

Accent· 4%

#97a46b

Secondary· 3.5%

Business & Marketing Stack

4 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.prod.website-files.com(3)googletagmanager.com(2)js-eu1.hs-scripts.com(1)js-eu1.hs-banner.com(1)js-eu1.hs-analytics.net(1)

Website Identity

buildbuild.io

sales@buildbuild.io

5 years old

Location detected: 🇺🇸 United Statesvia ip

Gandi SAS📧 Google Workspace

Social Profiles

X (Twitter)LinkedIn

Sponsored

Last analyzed: 13 Apr 2026 at 08:44

AI-Powered Analysis

Technical Deep Dive

Technology Analysis for buildbuild.io

StackOptic has analyzed this website's technology stack. View the detailed breakdown in the sections above.

Analysis by StackOptic AIApr 13, 2026

AI-Powered Insights

Historical Analysis & Change Tracking