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.

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rescuetime.com

https://rescuetime.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

rescuetime.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.213.224.209

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

Nginx

Nameservers

dns2.rescuetime.com.dns1.rescuetime.com.

Performance

Page Speed

133 KB

75 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Amazon Web Services (AWS)

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

11 Technologies Detected

Analytics

Libraries

CSS Frameworks

Icon Libraries

Fonts

Tag Managers

Other

Other

Web Servers

SEO Analysis

D58/100

rescuetime.comrescuetime.com

Take Control of Your Time: Automatic time tracking with RescueTime!

Boost productivity with RescueTime's automatic time tracking software and timesheet app for freelancers, small businesses, project management, and employees....

Description truncated.

Title Length67 chars

Recommended: 50-60 chars

Description Length378 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (70/70)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

22 rules

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

No WAF

88d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

21.04.2025

Valid Until

16.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.rescuetime.comrescuetime.com

SHA-256 Fingerprint

38:11:F9:F1:47:1D:1B:36:87:72:DF:E5:48:BC:57:BA:14:5A:B6:E3...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src 'none'; base-uri 'self' docs.helpscout.net; chil...

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 13:25:18 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt2.aspmx.l.google.com

alt1.aspmx.l.google.com

aspmx2.googlemail.com

aspmx3.googlemail.com

+1 more

Domain Information

rescuetime.com

Domain Age

19y 6m

Created

14.08.2006

Expires

14.08.2028

Last Updated

16.06.2025

Registrar

Gandi SAS

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Nunito + sans-serif

56/100

Readability

/30

30/40

18px · LH --

Hierarchy

/20

25/25

4.44x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Nunito

Sans80px

Body Font

sans-serif

Sans18px

Contrast Ratio

Reading Comfort

~37 CPL

Needs attention

80px

44px

20px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 4.4x larger than body text.

✅ Good performance: Using 2 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.

⚠️ Risky: Text appears on background images without overlay protection.

GGoogle Fonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Customer Support

Help ScoutSMB

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Ad platforms and retargeting pixels

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

beacon-v2.helpscout.net(3)assets.customer.io(2)googletagmanager.com(2)connect.facebook.net(2)assets.rescuetime.com(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn TikTok Reddit

Sponsored

Last analyzed: 17 Feb 2026 at 13:25

Historical Analysis & Change Tracking