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

onlyoffice.com

https://onlyoffice.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

onlyoffice.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.174.113.98

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

CDN

CloudFront

Nameservers

ns-174.awsdns-21.com.ns-1915.awsdns-47.co.uk.ns-532.awsdns-02.net.ns-1528.awsdns-63.org.

Performance

Page Speed

538 KB

104 requests

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Next.js

CMS

Medium

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

9 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Microsoft Clarity FullStory

Meta Frameworks

CSS Frameworks

Icon Libraries

Tag Managers

Customer Support

SEO Analysis

B76/100

onlyoffice.comonlyoffice.com

ONLYOFFICE - Secure Online Office | ONLYOFFICE

ONLYOFFICE offers a secure online office suite highly compatible with MS Office formats. Connect it to your web platform for document editing and collaborati...

Description truncated.

Title Length46 chars

Recommended: 50-60 chars

Description Length201 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

8,097 URLs

robots.txt

905 rules

Sitemap reference found

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Security Score

81%Very Good

Interactive

HTTPS

No WAF

81d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

10.04.2025

Valid Until

12.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.onlyoffice.comonlyoffice.com

SHA-256 Fingerprint

A1:34:77:2F:1E:AE:BC:9D:C1:CC:36:36:F7:BF:3A:44:0C:4F:BA:17...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

110379

cache-control

⚪ Custom(s-maxage=31536000)

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'self' https://*.clarity.ms https://c.bing.com '...

content-type

text/html; charset=utf-8

date

Wed, 18 Feb 2026 14:30:21 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

fortimail.onlyoffice.com

Domain Information

onlyoffice.com

Domain Age

18y 10m

Created

15.04.2007

Expires

15.04.2026

Last Updated

16.04.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Open Sans

69/100

Readability

/30

30/40

24px · LH --

Hierarchy

/20

18/25

2.67x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Open Sans

Sans64px

Body Font

Open Sans

Sans24px

Contrast Ratio

Reading Comfort

~41 CPL

Needs attention

64px

40px

22px

24px

✅ Excellent readability: 24px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Customer Support

ZendeskEnterprise

Live chat and helpdesk tools

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(16)googletagmanager.com(2)scripts.clarity.ms(1)clarity.ms(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube GitHub TikTok Discord Telegram Medium

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Last analyzed: 19 Feb 2026 at 21:10

Historical Analysis & Change Tracking